AFR or fastburn heads
11-24-2002, 08:27 PM
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AFR or fastburn heads
I was planning to use a miniram or lt1 on a 383. Which heads would flow better or make more power, I would be running at high rpms like 6500.
11-24-2002, 08:33 PM
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Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
The AFR are far superior and i thin are about the same price. The fastburns are pretty much just aluminum vortecs. They are good but not that good.
11-26-2002, 04:02 PM
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Car: 86 Iroc-Z28
Engine: FB385
Transmission: 700r4
From what i understand the AFRs, but i will be using the fastburns b/c thats what came with the motor! I am also using the miniram. They are basically aluminum vortecs but from what i have heard they have great potential when worked. I did not have any work done to them. They are on the crate motor. Out of the box the AFRs from what people say! good luck
11-26-2002, 05:15 PM
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Car: 1986 Iroc
Engine: 454 Demon 850DP
Transmission: TH350, 3500 stall
Axle/Gears: 3.73
I think saying the Fastburns and the Vortecs are pretty much the same is like saying a Cavalier is pretty much a Camaro.
11-26-2002, 05:27 PM
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Car: 1986 Iroc
Engine: 454 Demon 850DP
Transmission: TH350, 3500 stall
Axle/Gears: 3.73
Here is the flow ratings of the two heads from purplesagetradingpost.com/sumner/techinfo/heads1.html
lift GM Fastburns GM Vortec
.100 62/55 70/49
.200 136/104 139/105
.300 187/133 190/137
.400 232/158 227/151
.500 266/180 239/160
.600 275/193 229/162
lift GM Fastburns GM Vortec
.100 62/55 70/49
.200 136/104 139/105
.300 187/133 190/137
.400 232/158 227/151
.500 266/180 239/160
.600 275/193 229/162
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