Hello,
I'm tuning a Mini Stock circle track car with a 2016 Focus SE engine, the customer has recently installed an ST intake manifold primarily for better fitment and engine placement in the chassis (foxbody)
I've got it almost back to the power we had before with the SE intake but I'm running into an issue with the exhaust cam position.
At 5,100rpm without fail it drops from 15* to 10* no matter what I try, I've changed all relevant mapped points and optimum power angle tables to 15*
VCT Schedule Mode shows Optimum Power, but you can see the distance to OP change from 0 to 5.
Any ideas what I'm missing? This is a race car that sees 4700-7800rpm and it's off throttle or WOT, I'm not concerned with drivability.
Please see attached log and tune file.
Dyno graph attached, thick line is previous near stock tune with SE manifold and thin line is new manifold.