AFR Ratio

[schacher94gt]

Does anyone know what the air fuel ratio on our stock 5.0s in WOT? I found that at cruising its 14 to 1, but haven't found anything on WOT. Can I just get a AFR regulator or do I have to dyno tune it, to change my ratio?

 

[CC'S95GT]

Ideally you want 14:1 through out the rpm band. or just a tad on the rich side.
A tune would be the best way to get 14:1

 

[IceMan]

Normal driving 14:1 is not that bad but at WOT that's lean... Anything over 13:1 on a N/A application is lean...

 

[SVTurbo 98]

^agreed

typically 14.7 (stoich) is good for cruising and 12.5:1-13:1 at wot (n/a)

 

[schacher94gt]

so you think i should bring it down to 12.5:1 or 13?

 

[SVTurbo 98]

at WOT yes...and stoich while cruising

 

[gregbar]

With the APR you can adjust however you move the whole curve not just in one spot. If you want to reshape the curve then tune. WOT 12.7 AFR

 

[schacher94gt]

Alright thanks guys. Another question is I have a mail order SCT chip thats been burnt can i reflash that chip and use it again for my dyno tune?

 

[IceMan]

Yes you should be able to reflash it.

 

[Inspector13]

Yeah. 12.5:1 is where it should be at during WOT. ccasion14: