Little Chief head data

[RL]

Dart doesn't give any usable data

http://www.dartheads.com/products/aitdo ... e_id/2019/

so I was wondering if anyone knows the port areas of the available part numbers - basically what's the rpm ranges of the available heads -.

The motor is practically going to be a low maintenance 400cu ProStock engine. Rpm will be lower so that you can get a year out of it before a rebuild, and the valve train will be less aggressive so that springs last a season.

Also are there any other heads in the running that might make more power for the SBC - as a guess around 1000hp at around 9000rpm.

[Cubic_Cleveland]

How much money you got?
viewtopic.php?f=15&t=31234&hilit=Austra ... stock+head

[wyrmrider]

viewtopic.php?f=15&t=31234&hilit=Austra ... stock+head

[user-9274568]

Here are a few Pro-Filer 12º hand finished photos.

[RL]

Aust Pro Stock heads are too high end.

Those heads are for 1170hp at 10,000 rpm, way too much head for what I want. They have 4"+ CSA for 10,000 rpm operation, and that means that you need a valve train at the limit of control to utilize them.

What I want to know is do they make a smaller version for lower rpm, maybe something about 3.75" 9000rpm

Dart only gives a rough port cc for the bare casting, which is useless when the port length isn't stated.

[user-9274568]

Aust Pro Stock heads are too high end.

Those heads are for 1170hp at 10,000 rpm, way too much head for what I want. They have 4"+ CSA for 10,000 rpm operation, and that means that you need a valve train at the limit of control to utilize them.

What I want to know is do they make a smaller version for lower rpm, maybe something about 3.75" 9000rpm

Dart only gives a rough port cc for the bare casting, which is useless when the port length isn't stated.

I have the as-cast PF 12º at 3.60in² MIN.

[RL]

Thanks Chad, that's what I wanted to know.

Guessing that the Little Chief port is about 5.6" long, I'm looking for something like 330-350cc