Ecoboost Performance Forum

Racing Department => Drag Racing Results => Topic started by: steve142857 on October 06, 2013, 05:26:53 AM

Title: How-to optimize drag results
Post by: steve142857 on October 06, 2013, 05:26:53 AM
Hey there,
Since I have been many many times at the drag with both my 2010 and now a few times with my 2013, I figured I could share a bit of info based on my experience.
I have been asked a few times in private messages for tricks to improve drag results, so here are the factors that I can think of that will influence at a different level your time and speed when running the quarter mile.

1) Low D/A

2) Tailwind

3) Good 60':
a) warm tires (doing zig zag in the parking for 30 seconds without heating the engine, just doing donuts right and left at 10mph and then go directly to the lane (easier to do when there isn't too many people).
b) track well prepped (-don't go through the water box- look that there is glue on track- try to go in the lane where many cars just passed, that lane will be warmer)
c) Although I never played with this because my Hankooks are thebest out there to grip, you may want to play a bit with tire pressure.
d) Launch between 1800 and 2200... Sometimes launching too hard will cause tires to slip in the first gear change 1 to 2.
e) Spool turbos before green light... Once stage, ideally start brake/boosting keeping engine running at around 2000rpm for at least 3-5 seconds.

4) Lower the weight:
a) quarter tank of gas max (you may want to bring a separate fuel tank to leave on the side to fuel the car up after you finish) = -35lbs compared to half full.
b) remove spare and tools = -40 lbs
c) empty car from everything (glove compartment, floor mats, head rests, change, even wear light clothes if possible, lower windshield washer) = -5lbs

5) Keep engine cool: ideally with a fan plugged on the car battery. That cools the engine 10-20 times faster than even ice on the intake. Try to avoid big lineups before running... I often go on the side and try to jump in the line against a loner instead of making 30 minute lineups... You can also remove engine cover and the little round cylinder thing in ?mousse? that covers metal parts under the engine cover. Leave them outside of the car to reduce weight while at it...

6) Shallow stage

7) Keep a straight line from beginning to the end... Imagine someone that would move his car 2 times one foot left-right during the run... That means one foot right, one foot left to bring it back x 2 = 4 feet = 4/1320 = 0.3%. 0.3% of 13 seconds are 0.04 seconds just there!

8) TC off, D or Sport (for 2013 doesn't change a thing in my experience)... Close all things in the car (air, radio, ...)

The best scenario for best results is to go earlier in the day on a sunny day when temps are cool. You drive there, pay, and go directly at the lane and run 2-3 runs... The tires are normally warmed up from the drive to get there, but the engine is not warmed yet because it was ventilated while driving...

Please feel free to add other tricks or to comment on any of those... I just wrote everything that came through my mind. Sometimes, 0.01 second can make a difference for someone to achieve his goal, so the combo of all of the above is the way I did it to obtain the best of my machine... My car is not necessarely faster than others, but I just optimize my scenario...

Every 10F or 5C is about 0.10 second and 1mph trap speed
Every 100 lbs or 50kg is about 0.10 second and 1mph trap speed
Every 10mph tailwind is about 0.10 second and 1mph trap speed
Every 1000 ft of altitude is about 0.10 second and 1mph trap speed too.

So, imagine when I go to the drag strip with less than a quarter tank of fuel, emptied the car, go when it is 40F with a 10mph tailwind at 203ft. of altitude and run a 12.1 seconds at 115mph.
Another guy would go in Colorado at 5000 ft altitude when it is 80F with no tailwind and with a half tank of fuel =
0.5 sec for altitude, 0.4 sec for temps 0.1 sec for wind and .03 for fuel, so that is about one full second difference just because not running the good day at the good place and not emptying the car properly. If someone wants to achieve best results, that implies to drive a bit to find a good drag strip, low altitude and well prepped. Watch weather conditions to go on a cool day when tailwind...
There you go guys!
Good luck!
Steve
Title: Re: How-to optimize drag results
Post by: shoman04 on October 06, 2013, 07:54:40 AM
Thank Steve!!!! You have always been my MENTOR of SPEED. Your advise help me go from 13.0 flat tune only to 12.66 sec the fastest tune only car in the club !!! THANK YOU VERY MUCH. Now that I have METH, down-pipes, and 2.5 x-pipe/cat back I will be follow your lead to the lower 12's. It already let to me beating Crash head-up. We are talking about .005 of a sec. for a win!! Crash is a great guy too and that why it was such a big deal for me to WIN AGAINST HIM. Make me DANCE IN THE STREET!!!LOL :mike1:

(http://www.ecoboostperformanceforum.com/gallery/55_14_09_13_8_20_41.jpeg)
Title: Re: How-to optimize drag results
Post by: EcoBrick Bob on October 06, 2013, 01:02:32 PM
Great writeup!  But... at my age, I have already forgotten most of it!!!  LOL   I try most of these things. but have never seen any cooperative people I can cut in line with. At times I have actually ran vehicle thru water bath, only because there is so much crap on my tires from staging lanes.  If I can get enough burnout spin, it actually helped my times and eliminated blow-outs due to excessive front wheel spin.  Know this is contrary to logic, but it has worked for me.
Title: Re: How-to optimize drag results
Post by: Glassman710 on August 10, 2014, 09:36:57 AM
Hey there,
Since I have been many many times at the drag with both my 2010 and now a few times with my 2013, I figured I could share a bit of info based on my experience.
I have been asked a few times in private messages for tricks to improve drag results, so here are the factors that I can think of that will influence at a different level your time and speed when running the quarter mile.

1) Low D/A

2) Tailwind

3) Good 60':
a) warm tires (doing zig zag in the parking for 30 seconds without heating the engine, just doing donuts right and left at 10mph and then go directly to the lane (easier to do when there isn't too many people).
b) track well prepped (-don't go through the water box- look that there is glue on track- try to go in the lane where many cars just passed, that lane will be warmer)
c) Although I never played with this because my Hankooks are thebest out there to grip, you may want to play a bit with tire pressure.
d) Launch between 1800 and 2200... Sometimes launching too hard will cause tires to slip in the first gear change 1 to 2.
e) Spool turbos before green light... Once stage, ideally start brake/boosting keeping engine running at around 2000rpm for at least 3-5 seconds.

4) Lower the weight:
a) quarter tank of gas max (you may want to bring a separate fuel tank to leave on the side to fuel the car up after you finish) = -35lbs compared to half full.
b) remove spare and tools = -40 lbs
c) empty car from everything (glove compartment, floor mats, head rests, change, even wear light clothes if possible, lower windshield washer) = -5lbs

5) Keep engine cool: ideally with a fan plugged on the car battery. That cools the engine 10-20 times faster than even ice on the intake. Try to avoid big lineups before running... I often go on the side and try to jump in the line against a loner instead of making 30 minute lineups... You can also remove engine cover and the little round cylinder thing in «mousse» that covers metal parts under the engine cover. Leave them outside of the car to reduce weight while at it...

6) Shallow stage

7) Keep a straight line from beginning to the end... Imagine someone that would move his car 2 times one foot left-right during the run... That means one foot right, one foot left to bring it back x 2 = 4 feet = 4/1320 = 0.3%. 0.3% of 13 seconds are 0.04 seconds just there!

8) TC off, D or Sport (for 2013 doesn't change a thing in my experience)... Close all things in the car (air, radio, ...)

The best scenario for best results is to go earlier in the day on a sunny day when temps are cool. You drive there, pay, and go directly at the lane and run 2-3 runs... The tires are normally warmed up from the drive to get there, but the engine is not warmed yet because it was ventilated while driving...

Please feel free to add other tricks or to comment on any of those... I just wrote everything that came through my mind. Sometimes, 0.01 second can make a difference for someone to achieve his goal, so the combo of all of the above is the way I did it to obtain the best of my machine... My car is not necessarely faster than others, but I just optimize my scenario...

Every 10F or 5C is about 0.10 second and 1mph trap speed
Every 100 lbs or 50kg is about 0.10 second and 1mph trap speed
Every 10mph tailwind is about 0.10 second and 1mph trap speed
Every 1000 ft of altitude is about 0.10 second and 1mph trap speed too.

So, imagine when I go to the drag strip with less than a quarter tank of fuel, emptied the car, go when it is 40F with a 10mph tailwind at 203ft. of altitude and run a 12.1 seconds at 115mph.
Another guy would go in Colorado at 5000 ft altitude when it is 80F with no tailwind and with a half tank of fuel =
0.5 sec for altitude, 0.4 sec for temps 0.1 sec for wind and .03 for fuel, so that is about one full second difference just because not running the good day at the good place and not emptying the car properly. If someone wants to achieve best results, that implies to drive a bit to find a good drag strip, low altitude and well prepped. Watch weather conditions to go on a cool day when tailwind...
There you go guys!
Good luck!
Steve

thanks! great tips! When you say TC off do u mean Just TC off not sport mode or advance track off, just clarifying what works best :)
TC one click (TC off), hold brake Double click TC (Sport mode) or hold brake and hold TC button 5 secs (advance track off) which one works best :)
Title: Re: How-to optimize drag results
Post by: SHOnUup on August 10, 2014, 01:17:33 PM
Appreciate the write up.
Title: Re: How-to optimize drag results
Post by: ZSHO on September 23, 2014, 12:56:26 PM
Hey there,
Since I have been many many times at the drag with both my 2010 and now a few times with my 2013, I figured I could share a bit of info based on my experience.
I have been asked a few times in private messages for tricks to improve drag results, so here are the factors that I can think of that will influence at a different level your time and speed when running the quarter mile.

1) Low D/A

2) Tailwind

3) Good 60':
a) warm tires (doing zig zag in the parking for 30 seconds without heating the engine, just doing donuts right and left at 10mph and then go directly to the lane (easier to do when there isn't too many people).
b) track well prepped (-don't go through the water box- look that there is glue on track- try to go in the lane where many cars just passed, that lane will be warmer)
c) Although I never played with this because my Hankooks are thebest out there to grip, you may want to play a bit with tire pressure.
d) Launch between 1800 and 2200... Sometimes launching too hard will cause tires to slip in the first gear change 1 to 2.
e) Spool turbos before green light... Once stage, ideally start brake/boosting keeping engine running at around 2000rpm for at least 3-5 seconds.

4) Lower the weight:
a) quarter tank of gas max (you may want to bring a separate fuel tank to leave on the side to fuel the car up after you finish) = -35lbs compared to half full.
b) remove spare and tools = -40 lbs
c) empty car from everything (glove compartment, floor mats, head rests, change, even wear light clothes if possible, lower windshield washer) = -5lbs

5) Keep engine cool: ideally with a fan plugged on the car battery. That cools the engine 10-20 times faster than even ice on the intake. Try to avoid big lineups before running... I often go on the side and try to jump in the line against a loner instead of making 30 minute lineups... You can also remove engine cover and the little round cylinder thing in «mousse» that covers metal parts under the engine cover. Leave them outside of the car to reduce weight while at it...

6) Shallow stage

7) Keep a straight line from beginning to the end... Imagine someone that would move his car 2 times one foot left-right during the run... That means one foot right, one foot left to bring it back x 2 = 4 feet = 4/1320 = 0.3%. 0.3% of 13 seconds are 0.04 seconds just there!

8) TC off, D or Sport (for 2013 doesn't change a thing in my experience)... Close all things in the car (air, radio, ...)

The best scenario for best results is to go earlier in the day on a sunny day when temps are cool. You drive there, pay, and go directly at the lane and run 2-3 runs... The tires are normally warmed up from the drive to get there, but the engine is not warmed yet because it was ventilated while driving...

Please feel free to add other tricks or to comment on any of those... I just wrote everything that came through my mind. Sometimes, 0.01 second can make a difference for someone to achieve his goal, so the combo of all of the above is the way I did it to obtain the best of my machine... My car is not necessarely faster than others, but I just optimize my scenario...

Every 10F or 5C is about 0.10 second and 1mph trap speed
Every 100 lbs or 50kg is about 0.10 second and 1mph trap speed
Every 10mph tailwind is about 0.10 second and 1mph trap speed
Every 1000 ft of altitude is about 0.10 second and 1mph trap speed too.

So, imagine when I go to the drag strip with less than a quarter tank of fuel, emptied the car, go when it is 40F with a 10mph tailwind at 203ft. of altitude and run a 12.1 seconds at 115mph.
Another guy would go in Colorado at 5000 ft altitude when it is 80F with no tailwind and with a half tank of fuel =
0.5 sec for altitude, 0.4 sec for temps 0.1 sec for wind and .03 for fuel, so that is about one full second difference just because not running the good day at the good place and not emptying the car properly. If someone wants to achieve best results, that implies to drive a bit to find a good drag strip, low altitude and well prepped. Watch weather conditions to go on a cool day when tailwind...
There you go guys!
Good luck!
Steve

thanks! great tips! When you say TC off do u mean Just TC off not sport mode or advance track off, just clarifying what works best :)
TC one click (TC off), hold brake Double click TC (Sport mode) or hold brake and hold TC button 5 secs (advance track off) which one works best :)
Advance track off,hold button for 5 seconds with foot on the brake pedal and in drive,great you have the PP.
Title: Re: How-to optimize drag results
Post by: FoMoCoSHO on September 23, 2014, 07:51:21 PM
Hey there,
Since I have been many many times at the drag with both my 2010 and now a few times with my 2013, I figured I could share a bit of info based on my experience.
I have been asked a few times in private messages for tricks to improve drag results, so here are the factors that I can think of that will influence at a different level your time and speed when running the quarter mile.

1) Low D/A

2) Tailwind

3) Good 60':
a) warm tires (doing zig zag in the parking for 30 seconds without heating the engine, just doing donuts right and left at 10mph and then go directly to the lane (easier to do when there isn't too many people).
b) track well prepped (-don't go through the water box- look that there is glue on track- try to go in the lane where many cars just passed, that lane will be warmer)
c) Although I never played with this because my Hankooks are thebest out there to grip, you may want to play a bit with tire pressure.
d) Launch between 1800 and 2200... Sometimes launching too hard will cause tires to slip in the first gear change 1 to 2.
e) Spool turbos before green light... Once stage, ideally start brake/boosting keeping engine running at around 2000rpm for at least 3-5 seconds.

4) Lower the weight:
a) quarter tank of gas max (you may want to bring a separate fuel tank to leave on the side to fuel the car up after you finish) = -35lbs compared to half full.
b) remove spare and tools = -40 lbs
c) empty car from everything (glove compartment, floor mats, head rests, change, even wear light clothes if possible, lower windshield washer) = -5lbs

5) Keep engine cool: ideally with a fan plugged on the car battery. That cools the engine 10-20 times faster than even ice on the intake. Try to avoid big lineups before running... I often go on the side and try to jump in the line against a loner instead of making 30 minute lineups... You can also remove engine cover and the little round cylinder thing in «mousse» that covers metal parts under the engine cover. Leave them outside of the car to reduce weight while at it...

6) Shallow stage

7) Keep a straight line from beginning to the end... Imagine someone that would move his car 2 times one foot left-right during the run... That means one foot right, one foot left to bring it back x 2 = 4 feet = 4/1320 = 0.3%. 0.3% of 13 seconds are 0.04 seconds just there!

8) TC off, D or Sport (for 2013 doesn't change a thing in my experience)... Close all things in the car (air, radio, ...)

The best scenario for best results is to go earlier in the day on a sunny day when temps are cool. You drive there, pay, and go directly at the lane and run 2-3 runs... The tires are normally warmed up from the drive to get there, but the engine is not warmed yet because it was ventilated while driving...

Please feel free to add other tricks or to comment on any of those... I just wrote everything that came through my mind. Sometimes, 0.01 second can make a difference for someone to achieve his goal, so the combo of all of the above is the way I did it to obtain the best of my machine... My car is not necessarely faster than others, but I just optimize my scenario...

Every 10F or 5C is about 0.10 second and 1mph trap speed
Every 100 lbs or 50kg is about 0.10 second and 1mph trap speed
Every 10mph tailwind is about 0.10 second and 1mph trap speed
Every 1000 ft of altitude is about 0.10 second and 1mph trap speed too.

So, imagine when I go to the drag strip with less than a quarter tank of fuel, emptied the car, go when it is 40F with a 10mph tailwind at 203ft. of altitude and run a 12.1 seconds at 115mph.
Another guy would go in Colorado at 5000 ft altitude when it is 80F with no tailwind and with a half tank of fuel =
0.5 sec for altitude, 0.4 sec for temps 0.1 sec for wind and .03 for fuel, so that is about one full second difference just because not running the good day at the good place and not emptying the car properly. If someone wants to achieve best results, that implies to drive a bit to find a good drag strip, low altitude and well prepped. Watch weather conditions to go on a cool day when tailwind...
There you go guys!
Good luck!
Steve

thanks! great tips! When you say TC off do u mean Just TC off not sport mode or advance track off, just clarifying what works best :)
TC one click (TC off), hold brake Double click TC (Sport mode) or hold brake and hold TC button 5 secs (advance track off) which one works best :)
Advance track off,hold button for 5 seconds with foot on the brake pedal and in drive,great you have the PP.
Or there's always my car which likes to shutdown Advancetrak every time I cross 100MPH.
Title: How-to optimize drag results
Post by: 91hybrid on September 23, 2014, 08:23:50 PM
You're not alone. My seems to do it when I go over 110. 🙈


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Title: Re: How-to optimize drag results
Post by: steve142857 on September 24, 2014, 05:39:17 AM
I hold it 5 sec. Mine too shutdown the advance track over 110 or so. But if I leave it shutdown and run another run right after, I get the same results, so I guess it should make a b ig difference afterall. But TC off will get cut you 0.1 sec.
Title: Re: How-to optimize drag results
Post by: ZSHO on September 24, 2014, 06:17:04 AM
I hold it 5 sec. Mine too shutdown the advance track over 110 or so. But if I leave it shutdown and run another run right after, I get the same results, so I guess it should make a b ig difference afterall. But TC off will get cut you 0.1 sec.
Steve did your 2010 SHO shutdown advancetrack.if not could be due to the new updated ECU&PCM disabling it on the 13+SHO'S.
Title: Re: How-to optimize drag results
Post by: pejohnson on October 24, 2014, 10:44:15 AM
All great tips!  I followed all them to a T and got great results.  I am hoping to make it to the last track day this season this weekend.  My goal is to improve slightly on my times.  Rumors are winter blinds are here.  How should I combat that?  I was planning on arriving at the track with a little less than a quarter of a tank.  Should I add a half gallon of 100 octane fuel?  Or E85?  I certainly don't want to do anything to damage the engine which probably goes without saying.  Thoughts?
Title: Re: How-to optimize drag results
Post by: SHOnUup on October 24, 2014, 10:51:19 AM
All great tips!  I followed all them to a T and got great results.  I am hoping to make it to the last track day this season this weekend.  My goal is to improve slightly on my times.  Rumors are winter blinds are here.  How should I combat that?  I was planning on arriving at the track with a little less than a quarter of a tank.  Should I add a half gallon of 100 octane fuel?  Or E85?  I certainly don't want to do anything to damage the engine which probably goes without saying.  Thoughts?
I've had great success with adding 2 gallons of e/85 to a full tank of 93. Before hand I was getting sluggish performance with high knock readings. Only time will tell if this very slight increase in ethonal will hurt at all. Ended up running what I think is the best 3bar tune time to date. It actually has decreased my knock readings from prior to winter blend also.

Corn FTW!!!

Rich

Title: Re: How-to optimize drag results
Post by: pejohnson on October 24, 2014, 03:48:40 PM
Interesting!!  Hmmm I probably will hold off until more confirm the pros and cons.

Anyone using higher than 93 octane on their tuned vehicles. Trying to decide what to do in preparation for this Sunday.


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Title: Re: How-to optimize drag results
Post by: SHOnUup on October 24, 2014, 03:52:06 PM
FoMoCoSHO is the resident expert here on this.  Maybe shoot him a PM

Rich

Title: Re: How-to optimize drag results
Post by: SHOmanMike84 on October 24, 2014, 05:34:04 PM
I too am running a 25% mix of E85 and 91 octane with great results, a big thanks to FoMoCoSho for the inspiration.

Almost zero knock and the car pulls great, give it a shot. Plenty of calculators online to determine your percentage. I personally use an E85 app I found on Google Play Store, super convenient especially while at the pump.
Title: Re: How-to optimize drag results
Post by: Airbornemaikai on October 24, 2014, 06:22:33 PM
I've been running a 16% blend with 91 non ethanol and e85. No matter how many times I explain to the attendant exactly to the penny the amount of gas I want they always ask me why. I calculate it to the penny so that way I don't have to worry about accidentally squeezing over at the pump
Title: Re: How-to optimize drag results
Post by: Josephm on October 24, 2014, 08:24:00 PM
Why don't you use 92/93 with E?
Title: Re: How-to optimize drag results
Post by: Airbornemaikai on October 24, 2014, 09:45:58 PM
None available in my state
Title: Re: How-to optimize drag results
Post by: SHOnUup on October 25, 2014, 06:16:03 AM
I've been running a 16% blend with 91 non ethanol and e85. No matter how many times I explain to the attendant exactly to the penny the amount of gas I want they always ask me why. I calculate it to the penny so that way I don't have to worry about accidentally squeezing over at the pump
They look at me weird too when I say I'll take $3.58 on pump whatever...don't know if it's a man this guy's broke look or is he insane look. Lol

Now that I'm sure to top off each time to keep the mix right, my other weird look getter is gone. As I'd come in purchase a few things and ask for total, then quickly do the math in my head to equal an even amount. The puzzled look when doing this turns to a wow look when they add the odd gas request and it's say $50 even...long lost art of math.

Rich
Title: Re: How-to optimize drag results
Post by: pejohnson on October 25, 2014, 09:30:20 AM
Should I take the under belly shield off?  I know at high speeds people have experienced hood vibration. Not sure if would happen or not at the strip. Thought by removing it might help with engine temps.


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Title: Re: How-to optimize drag results
Post by: SHOnUup on October 25, 2014, 09:34:44 AM
Should I take the under belly shield off?  I know at high speeds people have experienced hood vibration. Not sure if would happen or not at the strip. Thought by removing it might help with engine temps.


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Good question. Maybe extra drag would be created by removing this. Some have removed the plastic strip along the back of the hood where it meets the windshield. Might be a better option to avoid extra drag and the possible hood shake.

Rich

Title: Re: How-to optimize drag results
Post by: SHOdded on October 25, 2014, 10:13:03 AM
I would back Rich's comment about the plastic strip.  Getting rid of heat effectively will probably be a better approach for the drag strip.
Title: Re: How-to optimize drag results
Post by: Larrylu on October 25, 2014, 10:54:02 AM

Should I take the under belly shield off?  I know at high speeds people have experienced hood vibration. Not sure if would happen or not at the strip. Thought by removing it might help with engine temps.


Sent from my iPhone using Tapatalk
Good question. Maybe extra drag would be created by removing this. Some have removed the plastic strip along the back of the hood where it meets the windshield. Might be a better option to avoid extra drag and the possible hood shake.

Rich

Removal of the rubber seal at the back of the hood/firewall has been a good experience for me. No noticeable water intrusion at all and coupled with the engine cover removal, I have achieved a real measurable IAT2 temp drop. 
Title: Re: How-to optimize drag results
Post by: pejohnson on October 25, 2014, 01:30:19 PM
Interesting. I may give that a try. Thanks.


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Title: Re: How-to optimize drag results
Post by: ZSHO on October 26, 2014, 07:32:29 AM
http://www.amazon.com/gp/product/B00029KC2U/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 (http://www.amazon.com/gp/product/B00029KC2U/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1) ordered some heat shield tape and installed it around the intake and with the combination of removing the cowl cover that Rich pointed out and engine cover will see a drop in IAT temp's cause our car's are so sealed top to bottom and limiting the engine to breathe,will check with torque if any drop in IAT'S.
Title: Re: How-to optimize drag results
Post by: SHOnUup on October 26, 2014, 08:06:55 AM
Would like to defer the above mentioned credit to Larry, (thx though) as I'm pretty sure he was the one with this clever idea.

Rich

Title: Re: How-to optimize drag results
Post by: dappie99 on August 25, 2016, 09:56:28 AM
Taking my to local 1/8 mile track again this weekend. Great tips!
Title: Re: How-to optimize drag results
Post by: lamrith on April 17, 2017, 10:19:08 AM
So newby to the SHO and AWD launching here, hoping to get a little clarification on the boost brake launch.

As soon as you go green and let off brake do you plant the throttle or roll into it at same time you let off brake?

I know when I have been trying to datalog if I just mat it, it tends to spin allot more than rolling into it.  That is usually colder road vs prepped track though.
Title: Re: How-to optimize drag results
Post by: derfdog15 on April 17, 2017, 10:44:32 AM
So newby to the SHO and AWD launching here, hoping to get a little clarification on the boost brake launch.

As soon as you go green and let off brake do you plant the throttle or roll into it at same time you let off brake?

I know when I have been trying to datalog if I just mat it, it tends to spin allot more than rolling into it.  That is usually colder road vs prepped track though.

I got better results by putting it to the floor when launching, I would brake boost between 2000-2200 RPM, and on the 3rd yellow, let out of the brake and simultaneously floor it. This got pretty good reaction times, and nice 60' times with all season tires (1.7-1.9).
Title: Re: How-to optimize drag results
Post by: TopherSho on April 17, 2017, 11:27:22 AM
So newby to the SHO and AWD launching here, hoping to get a little clarification on the boost brake launch.

As soon as you go green and let off brake do you plant the throttle or roll into it at same time you let off brake?

I know when I have been trying to datalog if I just mat it, it tends to spin allot more than rolling into it.  That is usually colder road vs prepped track though.

--avoid gravel, dirt, water at all costs.
--slowly drive into the box, and super creep to get the second stage light lit without rolling any further into it.
--brake hard
--push the gas so the rpm is 1900-2000 (for me).  keep it STEADY at that rpm.  The SOONER you can start this the better as you are low speed spooling the compressor.  With the compressor already spinning you have taken some of the inertia penalty away from the launch.
--wait for light number 3 on the full tree to light up.. this is 500ms between each light.  so,  yellow, yellow, yellow and go! BEFORE green.  100% stab\murder the gas pedal while releasing the brake.  do this simultaneously and as lightning fast as you can.
--hang on

** LANE ETIQUETTE!  *remember* 
-Know where the exit is... this is critical to not getting thrown off the track.  If the exit is on your LEFT,  and you are in the RIGHT lane. DO NOT CROSS THE LANES until the left car has exited FULLY.  And if the exit is on the RIGHT, and you are in the left lane do not cross the right lane until the right lane has fully exited.
-make eye contact with the lightman when lining up. its polite. and you will be able to communicate more.
-bring pants.
-bring shoes, no sandles
-bring a HELMET,  SNELL SA2010 or better (and yes there expensive-ish), Not a SNEL M2010 helmet although some tracks do not inspect that close, but if they do a M rated helmet is not the same as a SA rated helmet. 

Title: Re: How-to optimize drag results
Post by: Macgyver on June 23, 2017, 02:25:21 PM
So newby to the SHO and AWD launching here, hoping to get a little clarification on the boost brake launch.

As soon as you go green and let off brake do you plant the throttle or roll into it at same time you let off brake?

I know when I have been trying to datalog if I just mat it, it tends to spin allot more than rolling into it.  That is usually colder road vs prepped track though.

--avoid gravel, dirt, water at all costs.
--slowly drive into the box, and super creep to get the second stage light lit without rolling any further into it.
--brake hard
--push the gas so the rpm is 1900-2000 (for me).  keep it STEADY at that rpm.  The SOONER you can start this the better as you are low speed spooling the compressor.  With the compressor already spinning you have taken some of the inertia penalty away from the launch.
--wait for light number 3 on the full tree to light up.. this is 500ms between each light.  so,  yellow, yellow, yellow and go! BEFORE green.  100% stab\murder the gas pedal while releasing the brake.  do this simultaneously and as lightning fast as you can.
--hang on

** LANE ETIQUETTE!  *remember* 
-Know where the exit is... this is critical to not getting thrown off the track.  If the exit is on your LEFT,  and you are in the RIGHT lane. DO NOT CROSS THE LANES until the left car has exited FULLY.  And if the exit is on the RIGHT, and you are in the left lane do not cross the right lane until the right lane has fully exited.
-make eye contact with the lightman when lining up. its polite. and you will be able to communicate more.
-bring pants.
-bring shoes, no sandles
-bring a HELMET,  SNELL SA2010 or better (and yes there expensive-ish), Not a SNEL M2010 helmet although some tracks do not inspect that close, but if they do a M rated helmet is not the same as a SA rated helmet.

Awesome stuff. Great to know.