[BB_Mike]

If I was to build a naturally asperated 540cid motor (dart Big M) with 8.5:1 Compression ratio and the heads being used where 340cc runner BB 2X brodix heads, what horse power should I shoot for?

I'm asking because I am about to decide on a camshaft for my twin turbo 540 that has a boosted goal of 1200+HP, but I would like a n/a goal as well. So I am thinking I should aim for a 600HP n/a motor build. My goal is to have decent off-idle giddy up (non boosted), but not to have a radical idle or crappy starting woes.

I wanted to ask before I start into the camshaft "talks".
If I am out in left field, just let me know, please.

 

[BillyGman]

Just a guess on my part, but I don't think you're out in left field on this at all as far as a 600 HP N/A goal. I DO think that you're going to need to throw a whole lot of boost pressure at it to reach your 1,200 HP forced induction goal though. How much boost are you planning on? I bet you're not going to be able to use a conventional head gasket type for the level of boost pressure that you'll need. Something tells me that you'll need to groove the deck surfaces of the block for o-rings. I don't know much about that though.

EDIT: ooops, I just noticed that you've listed a twin turbo. I thought you were talking about a supercharger.