GM STAGE 2 tune
11-03-2017, 03:01 PM
#26
Senior Member
iTrader: (6)
It might make more power up top with a 2.9 pully but less torque down low I'm guessing
I'm also assuming the kncock sensor is taking timing out when the injectors max out causing a drop in power at high rpm. But honestly I don't feel the power fall off at all up to 7200 I've never watched the timing advance closely at the top of any gear. Might try that sometime when the roads are dry
I'm also assuming the kncock sensor is taking timing out when the injectors max out causing a drop in power at high rpm. But honestly I don't feel the power fall off at all up to 7200 I've never watched the timing advance closely at the top of any gear. Might try that sometime when the roads are dry
11-03-2017, 03:09 PM
#27
Moderator
with an aftermarket tune and a modded car, your driveability, NVH is never going to be perfect. Theres always going to be weird quirks or small things that happen. If you want perfect drivability and NVH you would need to buy a new car. Or spend days or weeks of seat time tweaking every piece of your tune, which is a waste of time IMO.
11-03-2017, 03:13 PM
#28
Senior Member
iTrader: (6)
with an aftermarket tune and a modded car, your driveability, NVH is never going to be perfect. Theres always going to be weird quirks or small things that happen. If you want perfect drivability and NVH you would need to buy a new car. Or spend days or weeks of seat time tweaking every piece of your tune, which is a waste of time IMO.
11-03-2017, 03:39 PM
#31
Senior Member
iTrader: (6)
That's how it started for me, then I started logging my drive to and from work and making little tweeks, I usually make small adjustments every spring and fall in part to help with traction for winter and the idle load is different and the lnf is stupid for idle tuning, still have a little more to get it to hold timing perfect (still bounces 1-3degrees)
11-03-2017, 03:55 PM
#34
That's how it started for me, then I started logging my drive to and from work and making little tweeks, I usually make small adjustments every spring and fall in part to help with traction for winter and the idle load is different and the lnf is stupid for idle tuning, still have a little more to get it to hold timing perfect (still bounces 1-3degrees)
Calibration is literally a full time job, so doing it myself in my free time, it doesnt really get the attention that it would at the oem level. Thats why I say it will never be exactly perfect. We dont have the equipment available to us(mostly due to cost) to create a perfect aftermarket calibration.
Ive been looking into buying a cylinder pressure sensor but the analyzer is 8500 and the spark plug/pressure sensor is over $5000
11-03-2017, 04:13 PM
#35
Senior Member
iTrader: (6)
ive always wanted to do stuff with cam timing, playing with small things like that.
Calibration is literally a full time job, so doing it myself in my free time, it doesnt really get the attention that it would at the oem level. Thats why I say it will never be exactly perfect. We dont have the equipment available to us(mostly due to cost) to create a perfect aftermarket calibration.
Ive been looking into buying a cylinder pressure sensor but the analyzer is 8500 and the spark plug/pressure sensor is over $5000
Calibration is literally a full time job, so doing it myself in my free time, it doesnt really get the attention that it would at the oem level. Thats why I say it will never be exactly perfect. We dont have the equipment available to us(mostly due to cost) to create a perfect aftermarket calibration.
Ive been looking into buying a cylinder pressure sensor but the analyzer is 8500 and the spark plug/pressure sensor is over $5000
The spark plug/pressure sensor/thermocouple would be an amazing purchase for getting things dialed in for road track use.
11-12-2017, 08:31 PM
#36
Senior Member
Thread Starter
I went out put a new maf sensor on and when I took the nut off the bracket the housing fell off... I forgot to tighten the hose clamp behind the maf....lol
I out the new maf sensor in anyways.
Seems to run really nice now. No more hesitation betweens shifts... For now
I out the new maf sensor in anyways.
Seems to run really nice now. No more hesitation betweens shifts... For now
11-12-2017, 09:56 PM
#37
Something is def wrong with the car.
I tried to read the comments and seems like your an idiot. Just being brutally honest. Also some info is missing or deleted.
Either way a real GMS2 does not do all the stuff going on there. If memory serves. A real GMS2 tune was using stock header and stock downpipe. Anything added after that affects it. The pulley is a 77.9mm or a 3.0-3.1. Something like that. Reliability was high on that tune as well. I read somewhere header and eBay cat or some ****.
If your thinking HP Tuner is expensive I can only imagine how much you would complain to get a Baja tune or a SCT to load up a MPT tune
hptuners are sold left and right for 350$. 350$ barely buys a cold air intake nowadays.
I tried to read the comments and seems like your an idiot. Just being brutally honest. Also some info is missing or deleted.
Either way a real GMS2 does not do all the stuff going on there. If memory serves. A real GMS2 tune was using stock header and stock downpipe. Anything added after that affects it. The pulley is a 77.9mm or a 3.0-3.1. Something like that. Reliability was high on that tune as well. I read somewhere header and eBay cat or some ****.
If your thinking HP Tuner is expensive I can only imagine how much you would complain to get a Baja tune or a SCT to load up a MPT tune
hptuners are sold left and right for 350$. 350$ barely buys a cold air intake nowadays.
11-27-2017, 07:31 PM
#41
Senior Member
Thread Starter
been looking at timing at WOT. with the 2.7 pulley i've seen it anywhere between 13-18. seems pretty conservative. but im ok with it esp w/ the pulley size