509 rotating assembly
 

Any track oriented real world thoughts on the 509 BBC? Its the next step with relation to the 427.....bore to stroke ratio the same. Piston speed same. I'm thinking about staying with the Rat pack and adding the ZF 6 speed. I would probably use a 502 block and a lightweight balanced rotating assembly. Eventually would like to try out the latest stack injection as well.

I realize the big block will make the front end a bit heavy. But what does it feel like compared to a fast rev small block? I would liken it to that of a heavy 302 with a lot more torque?

David

A 509 is likely where I'm gonna end up so I'm interested in this discussion as well. I really wanted to go 522 but can't bring myself to go .060 over on a block just for 13 cubes. Restricting the conversation to BBC builds, I think for a PT type application the big bore, short stroke would be a nice setup. At least that's what I've been led to believe :-). The arguments certainly make sense.

There have been a couple recent builds over on Chevelle forum that have been 4.0" stroke, 4.5"+ bore combos that have yielded great numbers. Lots of good BBC info over there.

Thank you John. I'll drop in over there and check them out.

David