safe af ratios on a 165

M

Mafix

New member

• Mar 28, 2006

• #1

i'm just curious what a safe level would be. mine is running rich but i don't want to lean it out too much. and i drive the car a lot so just a little leaner would be good. and i do plan on doing this ast a dyno i just don't want to have them do what they think is best.

 

S

smc252

New member

• Mar 28, 2006

• #2

12.3:1 does pretty well on 3s-gte's, it really depends on your tuning and fuel more then anything. As you probably know, it's better to be too rich then to go lean.

 

M

Mafix

New member

• Mar 28, 2006

• #3

so would that mean to run like 11.5 to 1 to keep it running longer? safe for friving ratios?

 

Austen_gt4

New member

• Mar 28, 2006

• #4

i'd go 11.5 to 1.

 

H

Hic

Member

• Mar 29, 2006

• #5

11.3:1 is safe and very good power ratio for 3s-gte, up to 1.3bar or little more

 

C

ChrisD

New member

• Mar 29, 2006

• #6

12.3 : 1 is way too lean. 11.5:1 is a good point for pump gas. 12.5:1 for race gas.

 

M

Mafix

New member

• Mar 29, 2006

• #7

htanks that is what i needed to know.

 

S

smc252

New member

• Mar 30, 2006

• #8

chris_dittrick":ot0s6bl2 said:

12.3 : 1 is way too lean. 11.5:1 is a good point for pump gas. 12.5:1 for race gas.

Click to expand...

I should have asked which ecu. The stock ecu uses too much timing, so yes you are correct, pig rich is great. I run 12.3:1 on pump gas and have no problems at all. Of course I am running Autronic though.

 

C

ChrisD

New member

• Mar 30, 2006

• #9

With autronic you have to watch out b/c you dont have any knock sensing function.

Here is an excellent thread to read regarding safe A/F ratios, written by a very good tuner. A few responses from other highly regarded tuners as well.

http://www.mr2oc.com/showthread.php?t=171448