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Old 07-17-2002, 05:31 PM
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Post GM Fast Burn Heads

I have been hearing a lot about GM Fast Burn Aluminum heads. The heads are used on the Chevrolet 385 HP "Fast Burn" crate motor. Are they worth the price $589 per head. Should I stick with a World Products Sportsman II Iron head for $795 per pair ? I have just heard the "Fast Burn" heads are the latest technology.

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Old 01-01-2007, 08:10 PM
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Second generation large port Vortec Heads are about the equal of Fast Burn heads at a lesser cost and are cast iron versus aluminum.
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Old 01-01-2007, 08:22 PM
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The Sportsman II has a "fast burn" chamber as well. It has to do with the design of the chambers, intake ports, spark plug location, etc. I believe most, if not all, aftermarket heads, as well as the GM Fast Burn and Vortec heads all share the same basic design principles.
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Old 01-01-2007, 09:19 PM
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Fastburn heads p/n 12464298 are CNC machined, 2.00"/1.55" valves, 210cc intake port, roof raised .240", 78cc D-shaped exhaust ports, raised .200", 62cc combustion chamber, 400" thick deck, angled plugs, screw in studs 3/8" top, 7/16" bottom. Quit a bit of differance to a Vortec head. This head delivers 40hp over Chevy's previously best head, the ZZ4 p/n 12556463.

Vince
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Old 01-02-2007, 10:46 AM
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The Fastburn 210cc alum. head was used on the limited run(just 430 made) 430 hp ZZ430.
They are also used on the ZZ383 425 hp crate engine.

As stated before the GMPP Largeport Bowtie Vortec heads, with 207cc intake ports are right there with the Fastburn 210 heads but are about $100 less per head.


GMPP 201 CC Fastburn heads
http://www.sdpc2000.com/catalog/3129...inder-Head.htm

207 cc Bowtie Largeport Vortec heads
http://www.sdpc2000.com/catalog/3129...inder-Head.htm

175 cc Bowtie Smallport heads
http://www.sdpc2000.com/catalog/3129...inder-Head.htm

The Fastburn heads have been out for a few years now.

The Fasburn and largeport Bowtie Vortec heads BOTh have a D shaped exhaust port which requiers a D shaped exhaust manifold(LT1/4) or large tube headers to cover the D ports.

peace
Hog
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