Hey, and I have the most with the lowest psi (~8.5psi) and totally stock engine components, along with the lowest-cost construction of the whole lot!
Where does that fit in?
Turbodude:
Thanks for the input. I was using a home-built manual boost controller to raise the boost to ~8-9psi and it was very tricky. This one uses a ball and spring but it also has a controlled leak for when the engine drops out of boost in order to vent the wastegate. I noticed some squirly stuff happening when I raised the boost much over 8psi. I am waiting until I get back from Iraq to get a better boost controller and to convert my stock manifolds back to headers. When those are done I'll dyno again and then decide which set of cams I am going to stay with.
I tuned my engine to 12:1 with a total variation across the A/F curve of 11.8:1 to 12.3:1. This was on 91 to 93 octane and it shows to be very promising. I am still running on a conservative timing curve as I can't afford to get back to SF in arizona where we can do a few actual runs and with the chip and change the timing. Better safe than sorry.
Oh yeah, I'm running a (I think) T3/TO4e 60 trim with a .83 exhaust. It spools to full boost in the 3500+ range.
Tom
