W/I activated, boost drops

lunchbox660 · 04-17-2007

Quote:

Originally Posted by VR6T

14.7 is the perfect afr for boost....

maybe on your car, but not an SRT4. antying leaner than 12.5 they start to get quite a bit of knock on 91 octane pump gas. if you are using an ultra high quality pump gas of maybe say 94 or 95 octane, i could see going leaner, but even on pure race gas i still would no way in hell run a 14.7 AFR. you will melt a hole right thru the piston with 20+ pounds of boost. on a naturally aspirated car, maybe ok, boost, no way.

vtec-this · 05-13-2007

eh, whoever told you 14.7 might wanna consult a general engine tuning book.

12.2:1 = mean best torque.

GQ4Life · 02-03-2008

14.7 is for best emissions.. 12.5 give or take a lil will give you most power..

JettaRed · 04-13-2008

I noticed the exact same thing, but after a couple of miles it seems to correct itself. I have a 2004 Audi TT 225 at 22 psi peak. I suspect the car was running rich until the ECU adjusted the fueling. Could be wrong, but it appears to be running fine now.

rjcornine · 06-02-2008

lol vr6t.. 14.7 is perfect a/f ratio for all cars... AT IDLE

you wont wanna have a 14.7 a/f ratio at wot on either NA car or Boostd cars.. lean out and then you'll lose your engine.. i would say shoot for mid 13s on n/a cars and to be on the safe side i would tune for mid 11s on boosted cars.. thats wide open tho.. if your running both o2s on my car the ecu will automatically tune the low throttle for you. on the spec v the tune is a breeze.. all you have to do is adjust the a/f's since we have a maf sensor the ecu adjusts everything else.. it's a sweet deal.

05-13-2007	#12 (permalink)
vtec-this Water Injection Year: 2003 Make: MazdaSpeed Model: Protege 2.0l Turbo FSDE Join Date: May 2007 Posts: 15	Re: W/I activated, boost drops eh, whoever told you 14.7 might wanna consult a general engine tuning book. 12.2:1 = mean best torque.

02-03-2008	#13 (permalink)
GQ4Life Water Injection Newb Year: 2004 Make: Dodge Model: SRT-4 Join Date: Feb 2008 Posts: 1	Re: W/I activated, boost drops 14.7 is for best emissions.. 12.5 give or take a lil will give you most power..

04-13-2008	#14 (permalink)
JettaRed Alcohol Water Injection Year: 2004 Make: Audi Model: TT225 Join Date: Apr 2008 Posts: 64	Re: W/I activated, boost drops I noticed the exact same thing, but after a couple of miles it seems to correct itself. I have a 2004 Audi TT 225 at 22 psi peak. I suspect the car was running rich until the ECU adjusted the fueling. Could be wrong, but it appears to be running fine now. __________________ 2004 Audi TT 225Q GIAC, Forge 007, Neuspeed 19mm RSB, 42DD Downpipe, BoostMachine, Haldex Blue, Devil's Own WM Injection 2008 Infiniti G35x (stock) 1999.5 Audi A4 1.8TQ Neuspeed 1 Bar, 710N 2000 Audi A4 1.8TQ GIAC, 710N 2003 GTI 1.8T Black SOLD 2001 Audi A4 1.8TQ DEAD 2000 Supercharged JettaRed DEAD

06-02-2008	#15 (permalink)
rjcornine Water Injection Newb Year: 2004 Make: Nissan Model: Sentra Spec V Join Date: Jun 2008 Posts: 1	Re: W/I activated, boost drops lol vr6t.. 14.7 is perfect a/f ratio for all cars... AT IDLE you wont wanna have a 14.7 a/f ratio at wot on either NA car or Boostd cars.. lean out and then you'll lose your engine.. i would say shoot for mid 13s on n/a cars and to be on the safe side i would tune for mid 11s on boosted cars.. thats wide open tho.. if your running both o2s on my car the ecu will automatically tune the low throttle for you. on the spec v the tune is a breeze.. all you have to do is adjust the a/f's since we have a maf sensor the ecu adjusts everything else.. it's a sweet deal.