Fast Burn heads

[Taylorman]

Im watching Overhaulin and they mentioned fast burn heads. I heard that term before but never knew what it meant.

[Oldsquirt]

Straight from the GM Performance Parts catalog for Fast Burn heads part#12464298. Note: these are for SBC only.
"The name Fast Burn refers to the heads ability to quickly and completely burn the air fuel mixture, resulting in higher cylinder pressures and more power. The shape of the combustion chamber is designed to accomplish this Fast Burn with flat top pistons, so flat top pistons are recommended with this cylinder head. It is not recommended that the combustion chamber be modified or reshaped as this could decrease the efficiency of the chamber."
The print catalog shows the combustion chamber design and it is quite different than the standard SBC combustion chamber. Unfortunately I couldn't find any pics on the net for you.

[Carbon Dave]

Here is a picture of them.
http://www.trademotion.com/sfimages/213920/partImages/SFPLImage18606.gif

[Blown 472]

And of course they stole the idea from mopar. :p

[Oldsquirt]

And of course they stole the idea from mopar. :p
...who in turn had acquired it from Sir Harry Ricardo......:p