Another turbo ?

Ed Wright · 05-13-2010, 01:27 PM

I have only tuned street cars with turbos, but those won't live long leaner than 12.0-1.
Mid elevens works well, and leaner shows very little power increase with a turbo.
12.8-1 & 13-1 are normally aspirated numbers.

Jim Wahl · 05-13-2010, 01:38 PM

11.2 A/F in a turbo race motor under load is ok. Better too rich that too lean, especially a turbo engine! You would be surprised how quickly those pistons go from being a solid to a liquid! Jim

LNorton · 05-13-2010, 04:26 PM

Marc, shot you a message on FB. Get back at me!

Jimi B · 05-14-2010, 08:45 PM

Just backing up what others have said. Mid 11s is about where you wanna be on higher octane pump fuels. Around 12:1 or so on higher octane race fuels. There is a lot to play with afrs on spool as well, but in a drag car this is not going to be that usefull.. Especially if its a stock turbo, prob spooling fairly well anyway..

05-13-2010, 01:27 PM	#1
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Another turbo ? I have only tuned street cars with turbos, but those won't live long leaner than 12.0-1. Mid elevens works well, and leaner shows very little power increase with a turbo. 12.8-1 & 13-1 are normally aspirated numbers. __________________ Ed Wright 4156 SS/JA

05-13-2010, 01:38 PM	#2
Jim Wahl Veteran Member Join Date: Jan 2002 Location: Central Florida Posts: 5,845 Likes: 672 Liked 683 Times in 129 Posts	Re: Another turbo ? 11.2 A/F in a turbo race motor under load is ok. Better too rich that too lean, especially a turbo engine! You would be surprised how quickly those pistons go from being a solid to a liquid! Jim __________________ Jim Wahl....NHRA #2239 S/SS - IHRA # 8 Stock, D2 Stock Champion (forever I guess) 2019 Baby Gators Stock Champion 2009 NHRA D2 National Open Stock Champion 1982 NHRA D2 West Palm Beach LDRS SS Runner Up Past President, Southern Stock / Super Stock Association.

05-13-2010, 04:26 PM	#3
LNorton Senior Member Join Date: Apr 2004 Location: RacerTees.com Posts: 505 Likes: 0 Liked 4 Times in 2 Posts	Re: Another turbo ? Marc, shot you a message on FB. Get back at me! __________________ Lee Norton - N229 STK IHRA H/FIA - NHRA O/SA RacerTees.com

05-14-2010, 08:45 PM	#4
Jimi B Member Join Date: Nov 2005 Location: Cincinnati Posts: 226 Likes: 0 Liked 0 Times in 0 Posts	Re: Another turbo ? Just backing up what others have said. Mid 11s is about where you wanna be on higher octane pump fuels. Around 12:1 or so on higher octane race fuels. There is a lot to play with afrs on spool as well, but in a drag car this is not going to be that usefull.. Especially if its a stock turbo, prob spooling fairly well anyway.. __________________ Jimmy Bowling BF/S 3808 www.facebook.com/jimib1980