What is a "fat head" cylinder head?

[flapjack]

I have heard of "fat head" cylinder heads but have no clue as to what "fat head" means. I tried googling, but google wasn't friendly today.

So, what's the scoop?

TIA

 

[Roadsters]

BAE "fat heads" - Google Search

BAE "fatheads" - Google Search

Brad Anderson Enterprises

 

[flapjack]

BAE "fat heads" - Google Search

BAE "fatheads" - Google Search

Brad Anderson Enterprises

Sorry for being dense here, but that tells BAE makes fat heads, but not what a fat head cylinder head is. What distinguishes a fat head for a normal head?

 

[flapjack]

I finally found something. Looks like the intake valve is repositioned and the exhaust port is modified to be used with low exhaust lift earlier timing on exhaust cycle. That and I believe they have larger combustion chambers.

Would an expert please correct me if I am wrong?

 

[Roadsters]

Here's a seven-page thread with lots of information: Hemi Tech

 

[flapjack]

Here's a seven-page thread with lots of information: Hemi Tech

Thanks!

 

[handsome]

the "fat head" has a smaller cc chamber than the standard fuel head. it's designed for alcohol class racing.