ECaulk

iTrader: (6)

Do a few, the more data he has the better

random_letters

lol it did what we wanted it to, limit the pressure.

Terminator2

Ok looking at it now. The Max airload torque needs work it is 100% the whole RPM range which should only be done at high altitudes when you want more boost to compensate for the lack of baro pressure. It is what is causing the big boost spike. Lower the lowest cell to 74% then ramp up smoothly to 100% by 4500-4750 RPMs. Desired airloads at 280% or so which is a tad high. Lower to 255% or so in the last column. Too much torque in neutral and in 1st gear lower those valves to around 55-65% max. Wg duty cycle tables are stock so desired boost up top is only 235 kpa (135 kpa once you take baro pressure out) Tune is not stock and looks nothing like a well done tune. needs lots of work IMHO.

Also has 4* of timing over stock up top which might be too much on 91 octane but fine on 93. PE lambda 0.88 which is fine.

random_letters

Im assuming you were talking to John there, cause I have no idea what is going on in this post... Ill just do the logs lol

I only run 93 octane.

Terminator2

If you follow those instructions you can make the spike stop. Easy. I told you what to adjust and where the numbers should be.

09CobaltSS1

NO.. Put it back to where it was, NOT 300kpa.

No real knock to write home about, and zero in the pull. As I've mentioned, the tune clearly needs work, however he is NOT spiking to 29psi. I'd say no more than 24psi tbh. I just need a log with my config to verify.

Just so everyone is clear who might not have read the thread up to this point. This is NOT my tune. I am only attempting to help someone with a botched setup.

Terminator2

No lower it to around 255% and lower the max airload torque in the low to midrange RPMs.

Terminator2

With the pressure RPM factor at 3.0 in the midrange, 280% DAL, and 100% MALT It could be spiking 30 psi but it will drop off up top.

09CobaltSS1

With the maf being as surprisingly dialed in as it is in the wot areas, and going off of maf flow and cylinder air mass calcs, it's highly unlikely the spike is anywhere near that. Regardless, I'll need that log to say for sure either way.

Terminator2

I would tend to agree but it is a near stock car so not going to breathe as well as a fully bolted one so I would expect airflow at a given boost level to be low.

That MAF cal and correction looks like an old one of mine for the K&N, however I will not claim the rest of that file LOL PE lambda is typical of a lot of tunes I do as well but other people use 0.88 lambda there as well.

random_letters

Its snowing here, so im going to have to wait until it stops and the roads clear up to make that log.
Ill post again when they're done.

09CobaltSS1

lol.. stop it.

If that's the case, I can pull up a dozen lnf files with k&n intakes strapped to them with similar scaling and say the same.

Ok sounds good. Just shoot me an email with the log and I'll check it out. You can also email me if you have any issues or questions.

random_letters

Sounds good. Thank you again.