Big ones yes, perhaps 33 but mine ran best at 32 at sea level.

Awesome combo, that thing will be a beast.

thx prosport i cant wait !!!

Whoa! all that torque would rip my poor B body in half

Congrats on a killer combo...thats quite an animal there!!!

That's on Pump junk???

no race gas but deffinatly not near max effort piece.built for a bracket racer before i bought it.a good buddy is shooting for 4digit #s on pump junk 572" with orig B1s with some serious work.. T-ram..twin doms etc.

Get the vacuum issue solved, wont ad much for power but engine well be happier. Put a larger carb on it, larger throttle blade and it will like that too. What fuel are you using? The BSFC's look pretty good, which explains the lower timing. IMO depending on fuel the AFR's are on the lean side especially up top. Still plenty there for sure. IMO carb spacer likely wont yield a ton as the intake on a B1 is pretty bug but a reversion plate and small tapered spacer may show some decent gains. Was still making power when the pull stopped as well.


Out little 572 made 1000 and seems to run a representative number to date, with plenty left. Good luck with it!!!

ya Al i agree looked alittle lean to me too we had Q16 in it...yes it was still making power he just didnt like the OP so cut it short. a bit more for a smoke free room(it was brutal couldnt stand in there for 10sec)and the rings were still not sealed because of the synthetic oil i used.also agree on the carb deal but i own it so thought i would give it a try...i was happy considering.. now time to get it to the track!!have some chassis work to do so hopfully in the next few weeks.

who did your heads and what flow numbers >?

some local guy ported them.....no flow #s but they measure 385cc with the RB plates.