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Re: WHICH ALUMINUM HEADS AND WHY?
[Re: LaRoy Engines]
#1242391
05/31/12 10:34 AM
05/31/12 10:34 AM
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Joined: Jun 2011
Posts: 1,039
ALBERTA CANADA
CUDA8U
OP
super stock
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OP
super stock
Joined: Jun 2011
Posts: 1,039
ALBERTA CANADA
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isn't the single plane only good til 500hp?
also just realized no one mentioned brodix heads
From personal experience:
M1 single plane
850 cfm Mighty Demon
451 cubic inch stroker, 9.5:1 compression
452 ported factory IRON heads 295 cfm @ .700"
just bought my holley 850 and my heads are STAGE 1 MUSCLE MOTORS "STREET KILLER" 250 cfm @ .500 LIFT ,CAST HEAD
10:1 COPRESSION
COMP CAM 21-224-4
M1 SINGLE PLANE
ROSS FLAT TOPS
CAT RODS
In what application are you using these "STREET KILLER" heads? They would be a little soft for a big 493 street stroker.
The ones we ported were 90 cfm @ .100", 166 @ .200", 218 @ .300", 255 @ .400", 278 @ .500", 288 @ .600" and 295 @ .700".
As your stated goal was 550-600HP the RPM head is fine for a 493. The RPM heads do have the potential to go 750+ HP with good porting, but if you ever plan on that much horsepower, you would be better to start with a better head than the RPM.
the street killer cast heads are on there now and this is why i'm asking about aluminum heads,i know i can't reach my goal with these heads
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