I'm going to be installing b&b test pipes shortly. Main reason is i dropped down to a 2.35" pulley and don't want to run the risk of burning them up. Guys that have done this, are you able to run a few more degrees of timing at WOT than WITH cats? I'm currently at 16* at WOT in the upper rpms with a 2.55" on 91/93 octane (which seems pretty normal). I know i can always trial and error this, but i'd figured i'd ask first. thanks
Less exhaust restriction can lead to more ignition timing
That's what I figured, just wanted to get some feedback from someone who has done it already
16* on 93 seems low. On 93 and catless I'm at 20* on E85 it's 27*
With my C6Z06 twin turbo I also significantly leaned out my fuel curve especially during idle
I'm at 16.5 on 91 in AZ with cats.
2013 OBM A6 CTS-V Coupe
Mods: Headers back Billy Boat Exhaust, GripTec 2.65, 8.6 PowerBond Lower, LSX Innovations Solid Isolator, ID850's, NGK TR7IX's, Accel 9070CK Wires, Spectre CAI, SRI Ported Throttle Body, SRI Catch Can, NGK AFRM, 160* T-Stat, 0fx2gv Brick, Hard Line Delete W/3/4" Lines, FB 101 FMIC, Pierberg CWA50, Stoptech Drilled/Slotted Rotors, EBC Redstuff, Cut Stock Springs, Flat Bottom Steering Wheel
2006 Black Raven STS-V (Traded In)
Fully Modded: 459RWHP@5888rpm/451lbft@4696rpm
occasional 91 octane goes in too. 16 is above 4000 rpms i believe ( i don't have my tune in front of me at the moment).Originally Posted by asteggall
i will take a look at this once i install them....thanks
Dealing with 91 sucks.
also, do any of you guys know which codes to disable in hptuners to prevent the CEL from popping up? I know i can disable any of the cat testing but i wasn't sure which codes to set to "NO ERROR REPORTED". Do i just disable anything that has to do with the "sensor 2" included in the description?
You got it anything to do with sensor 2.
sounds good, thanks
Just revisting this..How much boost are you running with these numbers? Are you on a stock lower with a 2.35 upper like me? You have headers?
Last edited by sgod1100; 09-26-2019 at 11:39 AM.
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2013 OBM A6 CTS-V Coupe
Mods: Headers back Billy Boat Exhaust, GripTec 2.65, 8.6 PowerBond Lower, LSX Innovations Solid Isolator, ID850's, NGK TR7IX's, Accel 9070CK Wires, Spectre CAI, SRI Ported Throttle Body, SRI Catch Can, NGK AFRM, 160* T-Stat, 0fx2gv Brick, Hard Line Delete W/3/4" Lines, FB 101 FMIC, Pierberg CWA50, Stoptech Drilled/Slotted Rotors, EBC Redstuff, Cut Stock Springs, Flat Bottom Steering Wheel
2006 Black Raven STS-V (Traded In)
Fully Modded: 459RWHP@5888rpm/451lbft@4696rpm
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