AJPTurbo boost regulator mod with EcoPowerParts charge pipes

[Colorado-SHOBro]

Kick ass! Great to see more of AJP's tuning genius come through with the #'s. And while i wouldn't exactly say your "stock pull" was too close to bone stock trim(with the intake,catless pipes,exhaust and E20 fuel) it does go to show how much difference that little bit of Ethanol makes in optimizing timing. I always used to run about 15-20% E when my car was bone stock and i swear i could feel a little bit of difference in the butt dyno. I imagine you left the wastegate connected for the stock pull and it just never opened?

[derfdog15]

Kick ass! Great to see more of AJP's tuning genius come through with the #'s. And while i wouldn't exactly say your "stock pull" was too close to bone stock trim(with the intake,catless pipes,exhaust and E20 fuel) it does go to show how much difference that little bit of Ethanol makes in optimizing timing. I always used to run about 15-20% E when my car was bone stock and i swear i could feel a little bit of difference in the butt dyno. I imagine you left the wastegate connected for the stock pull and it just never opened?

Correct. The wastegate was connected. I didn't hear it open though I believe it did open at the end of the pull on the shift, since the throttle closed and there would have been a pressure spike. Still some spike but not crazy. AJPTurbo left the throttle close logic in place for the stock like tune.

I think it's really interesting to see that the horsepower between the two doesn't have a drastic gap, telling me it is more related to the hardware, and confirming that with a MAP based system a lot of intake/exhaust mods don't need major tune changes

The torque is all from the tunes and I think it's amazing how much torque you can get from the tune. Definitely the best bang for the buck tune.

[f8tlSHO]

This was a mustang dyno, correct?
What boost level is this?


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[derfdog15]

This was a mustang dyno, correct?
What boost level is this?


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It was on a DynoJet, its actually the same model as the one that AJPTurbo did his dyno on a while back (before he sold his SHO).

I believe its commanding a bit over 15psi, its the same rev as the last few logs I posted in the wastegate mod thread. I seem to remember AJPTurbo saying it was looking for ~15psi.

We did determine that the "peak" torque numbers on some of the dyno graphs out there, are due to the spike on shift in/shift out. On these pulls the car was in 3rd from the start, and then the dyno operator nailed it

Based on my conversation with AJPTurbo my car is just about where it should be, and as mentioned, I could have gotten away with a higher wastegate spring on the dyno due to the way load is applied, it had enough that a 15.95 spring probably would have opened the gate (it was open for all 3 of the power pulls, the entire pull). BUT, the 14.5 spring is perfect for the load applied on the street.

AJPTurbo's dyno numbers on his car were with a bit more boost, not sure of his spark, though I believe it was lower.

This is an excerpt from my email with him, which explains why there would have been more horsepower with an increased spring rate, straight from the Log Warlock: "I think if the wastegate duty was a bit lower things would be more efficient  and power would've been closer to 400...When wastegate duty is high the gate is more shut in the turbo because it's trying to spin the turbo for more boost but then all the exhaust is exiting through the little turbine and not as much is escaping the wastegate."

Like I said earlier, I will keep it AS IS for now, and once the tracks open, get some baseline runs on the current setting. Then for the sake of track times, and since it will be warmer, we will probably tweak the tune a bit more (read: more boost) and I'll increment the wastegate springs and go up to the 15.95 and maybe even the 17.4 depending how things look at that point. I will try and do each of those changes one at a time so that I can get more of a comparison.

I am excited to see what this tune runs at the track, since my car ran 14.1 stock(just axelbacks and resonator replaced with an X-pipe), and 12.87 on 93 with 15 psi and a tune and CAI added to the car (plus the mods that were there with the 14.1).

Since then it has gotten E20, much revised tune, 170 thermostat, catless downpipes, hotpipes, boost regulator mod, and a TiAL Q BOV. Some of those (BOV and Chargepipes, as well as T-stat) are more of supporting mods to run a more aggressive tune, but still should be nice to see the gains. I hope for 12.3 or better as the car sits.

[f8tlSHO]

This was a mustang dyno, correct?
What boost level is this?


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It was on a DynoJet, its actually the same model as the one that AJPTurbo did his dyno on a while back (before he sold his SHO).

I believe its commanding a bit over 15psi, its the same rev as the last few logs I posted in the wastegate mod thread. I seem to remember AJPTurbo saying it was looking for ~15psi.

We did determine that the "peak" torque numbers on some of the dyno graphs out there, are due to the spike on shift in/shift out. On these pulls the car was in 3rd from the start, and then the dyno operator nailed it

Based on my conversation with AJPTurbo my car is just about where it should be, and as mentioned, I could have gotten away with a higher wastegate spring on the dyno due to the way load is applied, it had enough that a 15.95 spring probably would have opened the gate (it was open for all 3 of the power pulls, the entire pull). BUT, the 14.5 spring is perfect for the load applied on the street.

AJPTurbo's dyno numbers on his car were with a bit more boost, not sure of his spark, though I believe it was lower.

This is an excerpt from my email with him, which explains why there would have been more horsepower with an increased spring rate, straight from the Log Warlock: "I think if the wastegate duty was a bit lower things would be more efficient  and power would've been closer to 400...When wastegate duty is high the gate is more shut in the turbo because it's trying to spin the turbo for more boost but then all the exhaust is exiting through the little turbine and not as much is escaping the wastegate."

Like I said earlier, I will keep it AS IS for now, and once the tracks open, get some baseline runs on the current setting. Then for the sake of track times, and since it will be warmer, we will probably tweak the tune a bit more (read: more boost) and I'll increment the wastegate springs and go up to the 15.95 and maybe even the 17.4 depending how things look at that point. I will try and do each of those changes one at a time so that I can get more of a comparison.

I am excited to see what this tune runs at the track, since my car ran 14.1 stock(just axelbacks and resonator replaced with an X-pipe), and 12.87 on 93 with 15 psi and a tune and CAI added to the car (plus the mods that were there with the 14.1).

Since then it has gotten E20, much revised tune, 170 thermostat, catless downpipes, hotpipes, boost regulator mod, and a TiAL Q BOV. Some of those (BOV and Chargepipes, as well as T-stat) are more of supporting mods to run a more aggressive tune, but still should be nice to see the gains. I hope for 12.3 or better as the car sits.

Not sure I understand why u have a 14.5 spring in the gate if you are looking for 15psi. The gate is prob opening up all the time isn't it?


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[MiWiAu]

I think it's really interesting to see that the horsepower between the two doesn't have a drastic gap, telling me it is more related to the hardware, and confirming that with a MAP based system a lot of intake/exhaust mods don't need major tune changes

This statement is a little misleading. You can't really go off of peak numbers. Well, you can, but that doesn't really tell you the whole story.

I saw a similar phenomenon on my XSport where the peak HP numbers weren't all that different. In fact, I think MY AJP 87 tune showed peak HP that was like 0.2 HP less than the OE tune (going off fuzzy memory), but looking at total power, overall there was a substantial gain across the RPM range.

Similar story with yours. Just eyeballing, but it looks like you're making 50-100HP more through most of the RPM range. That's hugely drastic... and awesome!

I'll calculate your total power over the next few days and post it up for you to salivate over.



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[derfdog15]

Not sure I understand why u have a 14.5 spring in the gate if you are looking for 15psi. The gate is prob opening up all the time isn't it?


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The 15.95 and 17.4 springs were not cracking the wastegate when we started revising the tune. No whoosh, and still some spike on shift (slightly reduced on 17.4 a bit better on 15.95). With the 14.5 I still hit the boost commanded, but the car is basically flat on shifts, no spikes at all. However, due to how the dyno works, it put more load on the car, so the conditions the car was on while running on the dyno, would have most likely properly cracked the 15.95 setting, or possibly even the 17.4.

I think it's really interesting to see that the horsepower between the two doesn't have a drastic gap, telling me it is more related to the hardware, and confirming that with a MAP based system a lot of intake/exhaust mods don't need major tune changes

This statement is a little misleading. You can't really go off of peak numbers. Well, you can, but that doesn't really tell you the whole story.

I saw a similar phenomenon on my XSport where the peak HP numbers weren't all that different. In fact, I think MY AJP 87 tune showed peak HP that was like 0.2 HP less than the OE tune (going off fuzzy memory), but looking at total power, overall there was a substantial gain across the RPM range.

Similar story with yours. Just eyeballing, but it looks like you're making 50-100HP more through most of the RPM range. That's hugely drastic... and awesome!

I'll calculate your total power over the next few days and post it up for you to salivate over.

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Gotcha! You rock, thanks again for taking the time to look at data for my car haha. And I am already considering printing my dyno graph on photopaper and framing it lol, or maybe putting it in the garage so I can have motivation when I work on the car.

Mod wise, the car is basically at a standstill for now, next major mod will be custom FMIC but I want to wait till warranty is closer to out, and car is payed off or substantially down.

I will probably do colder plugs with a tight .3 or .28 gap once its time to do plugs, but 30k miles is still a year away at this rate haha.

[ZSHO]

There are five Topics scattered throughout the board AFAIK and might need to consolidate a few for less clutter.
Congrats and due produce a time slip this upcoming Spring track event especially with all the extra time,effort,$$ you put in to it,best of luck to ya.  Z
BTW if you ever in FL this summer make sure to LMK. 

[f8tlSHO]

Not sure I understand why u have a 14.5 spring in the gate if you are looking for 15psi. The gate is prob opening up all the time isn't it?


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The 15.95 and 17.4 springs were not cracking the wastegate when we started revising the tune. No whoosh, and still some spike on shift (slightly reduced on 17.4 a bit better on 15.95). With the 14.5 I still hit the boost commanded, but the car is basically flat on shifts, no spikes at all. However, due to how the dyno works, it put more load on the car, so the conditions the car was on while running on the dyno, would have most likely properly cracked the 15.95 setting, or possibly even the 17.4.

Ok, gotcha, wonder why this is.




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[f8tlSHO]

Awesome numbers by the way!!. I only have a mustang dyno near me, and apparently it reads lower than a normal mustang dyno. Prob a real heartbreaker. I think I may take it in once I get the wastegate on and working properly.


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[derfdog15]

Awesome numbers by the way!!. I only have a mustang dyno near me, and apparently it reads lower than a normal mustang dyno. Prob a real heartbreaker. I think I may take it in once I get the wastegate on and working properly.


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Yeah, mustang dynos are a bit weird, since they allow for a lot more shop calibration. That is why generally people look for dynojets. Mustang dynos can be skwewed high, low or calibrated to be similar to the DynoJet.

IMO, the timeslips are the real proof. But pulls on the same dyno can show a bit more of the gains per mod. It will be nice to have these dyno results once I start going heavier into the mods (FMIC, ATP Turbos, etc.).

That way we can have an apples to apples comparison for gains on those specific mods.

[f8tlSHO]

Got it hooked up, have to wait till tonight to take her out after kids go to bed.


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[SHOdded]

Good luck!  Thar she blows!!!

[f8tlSHO]

Ok, the gate did not open at all. I did not have the right spring in the gate. It came with 2 springs, a 7 and a 13. I must not have read instructions thoroughly. It is set for 20psi. I assumed there was supposed to be 3 springs and they shorted me one. Tomorrow is another day, the ground is wet here anyway, car was having trouble getting traction


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[derfdog15]

Ok, the gate did not open at all. I did not have the right spring in the gate. It came with 2 springs, a 7 and a 13. I must not have read instructions thoroughly. It is set for 20psi. I assumed there was supposed to be 3 springs and they shorted me one. Tomorrow is another day, the ground is wet here anyway, car was having trouble getting traction


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Good luck, do you have quick grips/similar (http://www.emedco.com/irwin-quick-grip-bar-clamps-spreaders-4b8.html?SKU=GG453&gclid=CIeDyu2NvtECFR6ewAods84AIw)

I clamp my gate to the workbench I use, with two clamps, and loosen all screws, then slowly back both grips off, it allows for the gate to relieve pressure without the top flying out/springs going everywere.

I do the same method to put it back together, gradually tighten the grips, then align the holes and bolt it up.

Make sure the diaphragm is clear of pinching and in the correct place as well when you put it back together.