SB2's are made to make HP at high rpm; granted the cam has a lot to do with that too, but even when they had the option of running either motor, the 18 degree motors had a flatter torque curve and were better for short track, sb2's ruled the speedways. Given that the average street motor doesn't spend much time at or above 8000 rpm, there are better head choices for a street motor, although I have to agree that they look REALLY cool under the hood.

I was talked out of it by a Busch Series engine builder. He developed the LS2 based spec engine for Busch East and Busch West. That is what is in my Camaro. Cheaper, better streetability, plus it was new, not some rebuilt race stuff. He had both to sell me, he just believes in the LSx potential.

http://www.wegnerautomotive2.com/

wow thats my kind fo shop, prety women and race engines in plain view and last but not least... beer on tap!


http://www.wegnerautomotive2.com/GRA..._engine5_x.jpg

From a power production standpoint, some of the aftermarket LS1/LS2/LS6 style heads are flowing up to 340 CFM on the intake, and the LS7 style are approaching 400 CFM. Purely from a performance standpoint, the 18 degree or SB2 heads are not going to have much more potential if any. Then add in the requirements for special rockers and offset solid roller lifters ...

Now, the sprint car heads from Brodix, Dart, or All-Pro are probably the best flowing small block heads of all. If you were going to build a 450+ CID, 8000 RPM motor, those heads with a Kinsler or similar individual runner FI would make a truly exotic setup.

That sounds pretty interesting. Do you have any more info on them?

Go on Brodix's website or look up M2 cnc'd heads (also sold by Brodix, but they do other mfg's stuff too.); some of the more radical non-production based stuff can flow 400cfm+.

VanB has a good point on the Busch LS based, but there are some oiling issues on the bottom end-- lots of lost motors at Louden this year from rods/cranks- a lot of people were blaming the spec required Wegner oil pan. They do make good HP in race form though, I believe that are talking 650ish with the 390cfm carb.

-Dan

hmmm we are getting in to teritory where i would opt for an aluminum big block with Big Chief heads instead... http://www.ultrastreet.net/632_1000_bd.asp with the price of a new, 8000 rpm kinsler injected large SBC you are almost into the same money....


personally id opt for the 582 with the aluminum block option http://www.ultrastreet.net/582_classic.asp that is 14500 bucksand it churns out 745 Hp on 92octane ánd comes with a 2 year warranty

The big blocks that i've been in aren't really the most driveable cars, generally require a lot more maintanence than a small block equivalent, and i assume are a lot heavier... so i think i'm probably going to stray away from one of those.

and i dont really plan on buying a full on, runs out of the box, crate motor. i would prefer building the motor up slowly myself, as i DO have a budget. but either way, i'm willing to pay money for something thats worth it... just not all at once :D

that being said, that shafiroff big block is seriously impressive.

I know exactly what you are talking about, i went with the LS1 for exactly that same reason.... here is a pic of what i ended up with... 2002 LS1, and a masterpower turbo from schwartz racing polished by yours truely should reach 500 rwhp as is... and is capable of double that with a forged rotating assembly and some ported heads.. and lotsa boost :D

http://i155.photobucket.com/albums/s...4/IMG_0551.jpg
http://i155.photobucket.com/albums/s...4/IMG_0557.jpg

that is pretty flippin sweet.