What is a good a/f ratio for turbo sohc?

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Old Aug 23, 2003 | 09:24 PM
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civic dx's Avatar
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Default What is a good a/f ratio for turbo sohc?

set up
-sohc d15b7,y7 head
-cr 10.1:1
-7psi non-intercooled
-fmu
-255 fuel pump

My a/f ratio is in the 14's at all rpm. I have detonation at full boost. I know i need a intercooler, but do I need a lower fuel ratio to get cure the detonation?



Modified by civic dx at 1:46 AM 8/24/2003
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Old Aug 23, 2003 | 10:22 PM
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As far as i know with most any turbo applications a good target a/f ratio is around 12:1.
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Old Aug 23, 2003 | 10:40 PM
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Default Re: (pkoury)

does anyone know what size NSX injectors are i have a set, but i don't have i resistor box for them.
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Old Aug 24, 2003 | 11:41 AM
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Default Re: What is a good a/f ratio for turbo sohc? (civic dx)

14.x:1 is WAY lean...

12.8:1 is about as lean as you want to run any turbocharged street car...and the closer to 12:1 you get, the safer it is...generally speaking, of course every car responds differently.

What size injectors are you running? And what fuel pressure @ 7psi of boost?
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Old Aug 24, 2003 | 01:08 PM
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Default Re: What is a good a/f ratio for turbo sohc? (civic dx)

12.5 under boost is pretty good.
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Old Aug 24, 2003 | 03:39 PM
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Default Re: What is a good a/f ratio for turbo sohc? (NaperNeonRT)

i am running my stock 230cc injectors. do i need bigger injectors of a bigger fmu disk?
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Old Aug 24, 2003 | 04:19 PM
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Default Re: What is a good a/f ratio for turbo sohc? (ekb18c)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ekb18c &raquo;</TD></TR><TR><TD CLASS="quote">12.5 under boost is pretty good.</TD></TR></TABLE>

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Old Aug 24, 2003 | 04:21 PM
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Default Re: What is a good a/f ratio for turbo sohc? (ekb18c)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ekb18c &raquo;</TD></TR><TR><TD CLASS="quote">12.5 under boost is pretty good.</TD></TR></TABLE>

Exactly what I tuned my hondata at.
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