Planning a 400 "B" Build

[MightyMats]

@Turboomni This was a 470 that was built that put out 730 hp

You need to forget everything you know about going fast naturally aspirated to hit the number you are after. 500 cubes with good heads and a turbo will make more power than you can get to the ground by 6000 rpm or less. Parts live a long happy life when you keep the RPM out of the stratosphere.

Boost is just a reflection of restriction so don't get hung up on a number. 15 lbs through a set of stock 906's will get your attention but a set of Trickflow 270's might make the same amount of steam at 7 or 8lbs. More flow = less restriction = less boost to move the same volume of air into the engine.

E85 fuel will be your friend as well as EFI. A stock properly prepared block will live in the 1000 hp range provided you don't get greedy with the tune up. Detonation is what kills blocks, not horsepower.

Kevin

That car from Finland is awesome. You are right with the EFI. Having a computer to control the air/fuel ratio would be a huge relief. Because if the engine ever ran lean, BOOM!

Also being able to take some power out of the car for driving the car when i'm not on the track would be a nice benefit of the EFI. Good thoughts

 

[Gerald Morris]

Apropos "thin walled" 400 blocks...:

440 Source.com Everything you've ever wanted to know about blocks and more....

 

[furious70]

There's a difference between a DIY/junk yard build like mine and an 8sec big car build.
Modern turbo engines have more in common with na engines when you buy custom turbos rather than use dump truck units.
TRENDZ on moparts made strong power with a 470" b, it'd be worth looking him up.
Efi is mandatory these days IMO.
Water/meth injection can help you stay on 93octane.