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Re: YET ANOTHER HOW MUCH DOES IT MAKE QUESTION!!!
[Re: topbrent]
#704906
05/23/10 07:33 PM
05/23/10 07:33 PM
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Joined: Jun 2009
Posts: 705 Michigan
Hemiroid
super stock
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super stock
Joined: Jun 2009
Posts: 705
Michigan
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Quote:
Quote:
GTX weighs 3740,race weight,and runs 11.19-11.30 @ 120mph. Motor's a '70' +.040 440 block,10:25:1 Diamond Forged pistons,OTB Eddy Performers,Comp SQ solid flat tappet with .610 lift and 260/266 @ .050 duration,105 installed centerline. M-1 intake,and 850 Holley DP. Headers are 2" TTI's, 3.5 collectors. Any estimates??? -RandyB
Randy,
In the Fall 2007 Engine Masters Magazine, Steve Dulcich dyno'ed a simple 448" motor back to back with stock RPM heads vs Modern Cylinder Head CNC RPM heads.
At 6000-rpm peak, he gained 46 HP with the swap. From 529hp to 574hp His combo: - Speed-Pro-2355 pistons, 10.2 compression - Comp MM Flat tappet cam, 243°/247° @.050, .586/.597 lift, 110°LSA, 106° installed - Comp 1.6 Roller rockers - Victor intake - RS1000 Demon carb - TTI 2-2_1/8 headers.
I guess I missed the "OOTB" comment the first time I read it. As Topbrent mentioned, there's lots to be gained from Jeff's CNC porting over the OOTB heads.
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