So, running 10 lbs of boost, and staying steady at 11:1 A/F ration til high RPMS then dropping to about 10.9:1. Am i the only one that thinks this is low? I notice others running same setup with about 13:1. What should I do to bring it up? Thanks

 

You are running a little on the rich side. Ideally at WOT in the high RPMS 12.0 A/F would be good. You could pick up a littel HP if you lean it out but it was probably done as a conservative tune.

 

Was this a stock tune from JBA or was it dyno tuned? you could just get it retuned

 

I'd like to know as well ...

 

First, where are you reading AFR? I'd assume it is right at the collector, but I have to ask.

Assuming you are in the collector area, on a 10# S/C setup I wouldn't go richer than 11.8-12.2 AFR for a solid street tune. You could get into the LOW 13 AFR if you really wanted to push it, but I generally wouldn't.

In any event, 11.0 is not too horrible and would certainly be a safe street tune. I've certainly seen worse.

Take care.

 

The tune was done on the Dyno at JBA.
I noticed that when I went back and had them re-tune it, the power was a lot more pronounced, but not sure what the A/F ration is now, the original tune was the 11:1, not sure if it was leaned out or not, as far as I know from watching them tune others, the reading was taken at the exhaust tip. I am not too concerned about it running leaner, after all that is why I had them build me my current motor, since I blew up the last when I had the STS turbo on it. :-) Just gotta blow up that wimpy stock tranny so I can replace it now.