Anyone with a 2.9!!!!
06-07-2012, 12:12 AM
#1
New Member
Thread Starter
Join Date: 11-22-10
Location: San Diego
Posts: 90
Likes: 0
Received 0 Likes
on
0 Posts
Anyone with a 2.9!!!!
Is anyone running a 2.9 on a stage 2 tune with 91 octane?????? I want to put my pulley on but people tell me different things. OR.... If you know it it safe for me to run a 2.9 on my 2006 cobalt ss with 49lbs, GM stage 2 tune header back all 3".????????
Please help me out... im going crazy with this pulley thing!!!
Please help me out... im going crazy with this pulley thing!!!
06-07-2012, 09:50 AM
#7
Is anyone running a 2.9 on a stage 2 tune with 91 octane?????? I want to put my pulley on but people tell me different things. OR.... If you know it it safe for me to run a 2.9 on my 2006 cobalt ss with 49lbs, GM stage 2 tune header back all 3".????????
Please help me out... im going crazy with this pulley thing!!!
Please help me out... im going crazy with this pulley thing!!!
make that a million and 1
06-11-2012, 07:21 PM
#13
Banned
iTrader: (2)
Join Date: 06-03-10
Location: HBG/Hanover
Posts: 6,919
Likes: 0
Received 0 Likes
on
0 Posts
ran out of injector lol, you can see commanded was way rich so this is what lead to it and was just one in a number of flashes thereafter, i think idcs were just below 100 when it was done but this is on a 3.0 and people thinking it's ok to run lower with a gms2 tune are delirious imo. granted you will have more or less inj depending on altitude as in CO you can run a 2.8 and 42's and be fine, but i don't see the point in putting a smaller pulley on if you can't afford a 2-300 dollar tune to make sure it's safe.
06-12-2012, 10:09 AM
#18
05slowline is right. I would never run anything lower then a 3.1" pulley on GMS2 injectors.
I maxed them right at 7k with a custom tune.
Stock Injectors Stock Pulley Stock Tune and all the bolt-ons - Saturn ION RedLine Forums
Of course the OP already heard the answer he wanted to hear so he is probably going to do it.
I maxed them right at 7k with a custom tune.
Stock Injectors Stock Pulley Stock Tune and all the bolt-ons - Saturn ION RedLine Forums
42s / 3.07" / Stock GMS2 Tune
Tune is from an 07 ION Redline
PE Fuel Multiplier vs RPM Table
I am not sure what the thought process behind this is...
It takes quite a while for the AFR to drop to a safe level. Before 4562 rpms the AFR was in the mid 12s.
100% IDC at 5841 and the lowest AFR of 10.7.
120% IDC and 11.8 AFR at 6626.
I wanted to rev to 7000 but I saw the lean spike and let off. I have a little more faith in this setup compared to the stock setup. I "think" that I can keep the IDC under 100% all the way to 7k with a custom tune that has the proper AFR. But its going to be close.
It will be really interesting to see what the 2.8" and 2.9" pulley does with these injectors.
Tune is from an 07 ION Redline
PE Fuel Multiplier vs RPM Table
I am not sure what the thought process behind this is...
It takes quite a while for the AFR to drop to a safe level. Before 4562 rpms the AFR was in the mid 12s.
100% IDC at 5841 and the lowest AFR of 10.7.
120% IDC and 11.8 AFR at 6626.
I wanted to rev to 7000 but I saw the lean spike and let off. I have a little more faith in this setup compared to the stock setup. I "think" that I can keep the IDC under 100% all the way to 7k with a custom tune that has the proper AFR. But its going to be close.
It will be really interesting to see what the 2.8" and 2.9" pulley does with these injectors.
06-13-2012, 12:03 PM
#23
Senior Member
Join Date: 11-20-06
Location: Charleston, SC
Posts: 537
Likes: 0
Received 0 Likes
on
0 Posts
I have logs somewhere of my 2.9 with 42s at over 120% duty cycle as well. Depending on your mod level and what you're revving to, I'd be very careful and recommend 60's.
06-15-2012, 01:15 AM
#25
Senior Member
Check this artical out by ZZP I think it should awnser your questions.
ZZP News | Go Fast... Not Broke | 3800 | Ecotec | Sonic/Cruze
And for what it's worth, I'm running a 2.85" (seems to be an oddball size) on 60s
ZZP News | Go Fast... Not Broke | 3800 | Ecotec | Sonic/Cruze
And for what it's worth, I'm running a 2.85" (seems to be an oddball size) on 60s