half-n-half

iTrader: (7)

hey guys i am curious what kind of AFR you huge cam guys are running at while daily driving..
Thanks
Louie

usd2sing

iTrader: (15)

good question...here's a bump..

txhorns281

iTrader: (12)

if operating in closed loop, then stoich (plus or minus whatever over/undershooting your fuel calcs are doing due to overlap characteristics). If OL, you can dial in whatever A/F you like, to the extent that a wideband monitor does not suffer the ill effects of low rpm overlap as well.

15.5ish is supposed to be optimal for gas consumption
14.7 is stoich
11.0-13.0 is for power production (depending on your setup)

Black02SS

iTrader: (36)

I shoot for 14.5-15.1

half-n-half

iTrader: (7)

do you guys feel that that AFR can still be accomplished with a large cam without bucking issues?

I will have to try it out and see for myself of course...

Thanks
Louie

gametech

iTrader: (1)

With a really big cam you may have to go to 12-12.5 or so to get a reasonable idle, but above 2krpm or so the normal afr's should apply.

Black02SS

iTrader: (36)

I have never had to take a cam lower then 14.5 to get it to idle and I am talking about some big cams.

SideStep

98redorangeta

iTrader: (10)

how big of a cam are we talking that needs 12-12.5 afr to idel

half-n-half

iTrader: (7)

at idle1000rpm(due to shake...not tuning) i am at 15.5...and i love the idle..
but i richened up all the other cells that i would cruise at 1400-2000 and up gets richer and richer and never above 14:1. i richened it up to alleviate some bucking and now i think i may be able to lean it out hopefully to regain a little gas milage.

If i lean it out and still get bucking what are some other options for me to take?

Thanks
Louie

GuitsBoy

iTrader: (4)

Im not a particularly big cam, but i just shoot for 14.63 at idle and part throttle, and 13.0 WOT

fast98

iTrader: (16)

i have a 224/228 110 and at idle i'm about 15-15.6, light throttle cruise is about 15.7-16.5 and moderate to heavy cruise 14-14.7 wot is 12.9