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Air/fuel ratio @ 9psi

1868 Views 18 Replies 10 Participants Last post by  JPSlick
what are some yalls air/fuel numbers at 9psi?
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should be 11.5-12.2
and what kind of numbers are you laying down with this ratio? bc mine is running extremely lean my tuner had no f***ing idea what he was doing. i have a 9psi pulley with 650cc injectors and my max read like 15.8.
and what kind of numbers are you laying down with this ratio? bc mine is running extremely lean my tuner had no f***ing idea what he was doing. i have a 9psi pulley with 650cc injectors and my max read like 15.8.
while in boost? no way your ratio was 15.8:1 in boost
and what kind of numbers are you laying down with this ratio? bc mine is running extremely lean my tuner had no f***ing idea what he was doing. i have a 9psi pulley with 650cc injectors and my max read like 15.8.
:rotfl: If you know your running lean why wouldn't you fix the problem or get a real "tuner"
:rotfl: If you know your running lean why wouldn't you fix the problem or get a real "tuner"
im gonna fix it just wanna know if thats why im not laying down what im supposed to
ur numbers are fine for 9psi. but i doubt ur hitting 15+ on your AF while pushing 9psi
ur numbers are fine for 9psi. but i doubt ur hitting 15+ on your AF while pushing 9psi
I thought it was supposed to be around 280?
I thought it was supposed to be around 280?
"2002 NHBP JRSC 288 whp/201 lbs @ 10psi"... thats in ur sig; 10hp per psi.. so 278 is very close to 280 @ 9spi. what DID you get if not whats in ur sig? The first posts are only u crying about A/F
should be 11.5-12.2
Gasoline is so terrible at removing heat that I like to run 11.6 as much as possible unless I'm spraying water/meth. That's my M.O.
I personally tune all f/i at 11.8 and all n/a at 12.8.
2% fuel (give or take)

Cut the difference.... 11.7 (call it a day)
2% fuel (give or take)

Cut the difference.... 11.7 (call it a day)
Your a good salesperson JP. Where do i sign? :)
11.8-12.2. This is where mine is. Runs fine. 280whp is the average...
11.8-12.2. This is where mine is. Runs fine. 280whp is the average...
my car is a little above average :D [steps off high chair]
I thought it was supposed to be around 280?
Sounds like you're going about this the wrong way. You're so concerned about making power, but you're not paying attention about how to do it safely and reliably.

With your reckless attitude you'll probably blow your motor within a month. Take the time to understand the details of tuning, A/F ratio, knock ... then your poor K20 might have a chance of surviving.


Good luck.
Your a good salesperson JP. Where do i sign? :)
Funny you say that, im in sales :mam:
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