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12-14-2009, 10:55 PM

argon929

Beginning Member

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Join Date: Nov 2009

Location: Kimball,MI

Posts: 38

afr

just cerious does any body no the air to fuel ratio for a stock 1999 blazer 4.3 vortec? i am getting into tuning my blazer adjusting fuel and spark tables and such i am try to get familiar with it all

12-15-2009, 03:13 AM

rriddle3

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Join Date: Dec 2006

Location: Fort Worth,Texas

Posts: 6,594

IIRC, it's 14.7:1 air to fuel.

12-15-2009, 06:13 AM

swartlkk

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Join Date: May 2005

Location: Waterloo, NY

Posts: 41,173

Quote:

Originally Posted by rriddle3

IIRC, it's 14.7:1 air to fuel.

Yep, that is basically the optimum AFR for any gasoline fueled internal combustion engine.

12-16-2009, 10:09 AM