Originally posted by bnoon:
Why do people think these are low numbers? That's 25 HP gain over a straight 3L swap...



Those number are just a bit over what I did with the 19# injectors (peak hp at 6000 RPM). Long since fixed, but never re-dyno'ed. I personally expect over 200 fwhp out of mine and once this setup is correctly tuned it should do the same IMHO. It's definitely too rich all across the board. 12.5:1 if measured in the upstream O2 bung, and a shade over 13:1 if measured out the back (with cats).

Hey, if you get a custom chip done (the best way to go again IMHO), make sure they open the IMRC at 3000 RPM. Go ahead, interpolate the hp curve from 3750 down to 3000 RPM, and you'll see why - that dip would pretty much go away.