Quote from: ddlopes on September 09, 2017, 06:11:56 PM
Check out this datalog... I think the knock is gone!!! I had to get out of the throttle because a car pulled out in front me.

You need a better datalog... no knock.. which is great... better than your other logs...  You switched to AJP huh? What octane gas are you using?

I know bad gas and meth was mentioned a few times. Nothing you can do till you get rid of it.

Unfortunately I spoke to soon. I got so excited that the problem was finally. LOL...
I took the care out again just to confirm the knock was gone. And it's back!!! Tomorrow I'm going through my whole meth system. I'm thinking there's a delay in the spray. My datalog showed my IAT started at 111 and was cooled down to 75 so I'm getting cooling. But the meth isn't cooling the air instantly like it should. So I'm going to check to see if there's a delay in the meth system. Also drain the meth tank. The other log that showed no knock was from me lowering when the meth started to spray. But it wasn't a full log as I stated. Hopefully tomorrow I'll finally get some insight to what the problem is.

Ok... just an update ... I removed the Airaid and installed my homemade boost tester. Then removed both nozzles from the hot pipes and plugged both holes. I added some clear line to the existing snow performance red meth line. This is for testing purposes only. I wanna see exactly what's going on with the meth before and after I spray. I'll also be removing the passenger side tire and inner wheel well to check on the pump and solenoid for any issues. Hopefully today I'll find the issue and it'll help someone else from having to deal with all this bull!!! Thanks for all the help you guys are awesome!!

Good luck!

Thanks

Ok I've absolutely proven the meth sprays exactly when the control unit calls for meth. I changed the start and full on spray points at several different psi and there was not one issue. Since I used the clear line I was also able to see what the meth was doing in the line before and after spraying. And the meth inside the line always stayed up by the nozzle prior to and after spraying. So there's not an issue with the line bleeding meth back towards the pump. There's also no leaks at any fitting, no kinks on any line and no leaks on any line as well. So it appears the system is working as intended. I completely flushed the meth tank and filled it with the supplier I normally use. The meth that was in the tank before was from a speed shop less then a mile from my house. The place where I usually go to is about a 30 minute drive away so I tried the place close to my house. Hopefully this cures the knock because the only other thing I could think of would be spark plugs. But they only have around 1500 miles on them.

Your not on the same tank of gas still are you?


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Yes but I put some Boostane in there just in cause. So it should of brought the octane up in case I got bad gas.

I ran a rev 10 tune that I got yesterday and didn't see any knock but Brad took timing out. So I'm not sure what my command for spark is. But I'm pretty sure it's on the low end. SBS where are you at with spark if you don't mind me asking.

Quote from: ddlopes on September 10, 2017, 04:15:38 PM
I ran a rev 10 tune that I got yesterday and didn't see any knock but Brad took timing out. So I'm not sure what my command for spark is. But I'm pretty sure it's on the low end. SBS where are you at with spark if you don't mind me asking.

Soooo I think I said before, burn through this tank of gas and reassess... a lot of those octane boosters are not consistent... I don't care with the market brochures say...

Do you have E around you? If you do a couple gallons will help significantly with knock until you get a new tank of gas.

If Brad is tuning around a bad tank of gas then it's a waste of your time and his.

Right now I am at 15psi of boost demanded with 20psi+ boost spikes and 28 degrees of spark.


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I don't have E85 here. I've got a 1/4 tank of gas left in the tank. I'll burn it up tomorrow and refill with 93. Then retest... I don't drive the car often so that's why it's taken so long to burn up a full tank of gas. I've had the car for 3 years and only put on 3800 miles. Thanks again SBS!

So we finally found the culprit of the knock with Brad's help and patients. After going through several different scenarios of what could be causing me to have knock even though I'm running 100% meth it turned out to be bad meth. Brad also did his magic messing with the fuel in the tune as well. I'm seeing approximately 50 degrees of temperature drop according to the IAT sensor. And I'm finally seeing cooling in first gear as well. Before I wasn't see cooling to later in the gears. I would like to say thanks to everyone for helping me. And especially Brad for everything he's done get this car to pull like never before!!!

Nice, bad fuel after all.  Thankfully no issues with your SHO.  Enjoy!

Quote from: ddlopes on September 11, 2017, 04:34:29 PM
So we finally found the culprit of the knock with Brad's help and patients. After going through several different scenarios of what could be causing me to have knock even though I'm running 100% meth it turned out to be bad meth. Brad also did his magic messing with the fuel in the tune as well. I'm seeing approximately 50 degrees of temperature drop according to the IAT sensor. And I'm finally seeing cooling in first gear as well. Before I wasn't see cooling to later in the gears. I would like to say thanks to everyone for helping me. And especially Brad for everything he's done get this car to pull like never before!!!

It is not uncommon.  Im 90% sure my meth is also stale-ish.  I mix 30-70 and after being away for 3 weeks I noticed my sho having issues maintaining spark.  after adding 2 bottles of heet to my reservoir in the car the issues dissipated until is filled it this week for data logging.

i do not think i sealed the VP can enough,  or the pump i used introduced some sort of contaminant.  I am revising my pumping methods to see about avoiding that.