Im going to be running a single precision T70 GTQ at 16 psi and hoping to hit at least 550 rwhp. Ive got a built engine at 9.17:1 compression, patriot stage 2 heads, stock cams, bullitt manifold, Cobra tank,twin GT pumps, KB 40a BAP, modded FPDM, Spec stage 3 clutch, and switching to dynomax ultraflow straight thru mufflers.
On gasoline I only tuned it @ 8psi and it made 490/510 on a dynojet with about 17 deg's of timing. On E85 I had no tuning ability so timing was locked at 16 deg's and @ 9psi the A/F was 10.8:1 where it made 481hp/507tq, moved the boost to 10psi and it made 509hp/540tq at the same 16 deg's, finally we went to 11psi and it made 539hp/578tq, again at the same 16 deg's but A/F was up to 11.2:1 (still pretty safe!). That's an average of 29hp per lb of boost!
I'm adding an inline pump then I'm ultimately going to run 18 psi with two 60hp shots of nitrous, both will come on @ 3000 rpm's, with one of them shutting off at 16psi or so. I would think it should be close to 750hp/850tq.
On my break in tune I made 575rwhp @ 12 lbs with na heads and turbo cams. I then bought a set of turbo heads and healthy cams but haven't been back. Unfortunately I'm installing a 4r70w tomorrow so when I go back my numbers won't be so great.