Pig Rich Wot

[Polyol]

From what I see looking at many treads with my mods. I sould have my afc high th point set at around -14 to -18, but when at that setting at wot my a/f ratio is about 9.0 pig rich. to get it to run 10.4 to 11.0 my high th points are set at -30 to -32. does this seem wrong
Thanks

 

[CanadianTSi]

You probably have a boost leak.

 

[oldman]

That actually sounds about right as stock AFR is about 9.5 : 1 and requires about -14% to bring that to 11 : 1, though a boost leak test will never hurt.

 

[drewvr4]

That actually sounds about right as stock AFR is about 9.5 : 1 and requires about -14% to bring that to 11 : 1, though a boost leak test will never hurt.

agreed sounds about right with how much you have dropped your ratio's...granted you have 550s and are running right around where my 650s are.

 

[Polyol]

I did a boost leak test and had a small one at the thortle body fixed that turned afc bact to around -20, and still pig rich slugish at 4000 to 6500 rpm hitting low 9's on wideband. ended up setting it back to around -30 to -31 and it's working great. I still don't understand why my setting are where 660 cc should be. Thanks for your input