It's possible. But your race weight will HAVE to be under 3k. With good air and around 370-380rwhp, 10's N/A is possible. But H/C/I is mandatory. -Mark

I've never heard of a 281" mod motor making 400rwhp N/A.
I could definitely be wrong. I'll get a strong answer tonight

according to blowbyyou's web site their agressive h/c motors make about 385rwhp in an M5. I bet with the right setup after some more reasearch is done into what cams work well with a 3V it could make 400.

Alright...so I asked a very good source and he thought that it's certainly
possible to make 400hp to the wheels through a manual tranny, but it would be
difficult. Through an auto, he thinks it's flat out not going to happen. I tend to
agree.

Granted the FS motors are 4v and are over 400rwhp or right at it but a 3v can get to 400 w/ out the limitations of FS rules. Big cams, lots of timing and alot of compression. Not really street friendly but 400rwhp is 400rwhp. Combined that with a super light weight chassis and I think you can squeeze out a 10.9X pass around 122ish. -Mark

Work on the rest of the setup for now. I bet within a year or so someone will be stepping up with a more HP for the 3v's. Especially once they get some more aggressive cams figured out.

I'm guessing an aftermarket intake would push it over the edge. of course this is without knowing anything about what the stock intake flows :lol: :eyes: I would like 400rwhp on pump gas.

Would we will be able to get enough compression from milling to get 400 hp. Remember I'm talking about the factory block, factory pistons just as my Camaro.

I know you can mill the heads to get 11:1 easily and top that with some dome pistons and I'm sure you get 12:1-12.5. Not really super high compression but add that to the timing, big cams, and maybe remove the power steering and get an electric water pump and 400 is achieveable w/ only 281 cubes, well 284 ci (.020 overbore for new pistons). But on pump gas(93) I don't think that's gonna happen. But Sunoco near my house has 100 so to me that's pump gas. :) It came from the pump. lol. But I'm sure you'll need 110+ for the race tune. It's alot of work to get 400rwhp. Just not as easy as a LS1 H/C/I combo. You damn LS1 guys, can I borrow 65 cubes? :jest: -Mark

EDIT: just re-read your post. On a stock shortblock, I don't know if milling the heads that much would get 12-12.5:1 and keeping the stock pistons. Still learning the 3v stuff.

what is the stock compression on a 3V anyway?