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Discussion Starter · #1 ·
I might be in the market for new heads. I'm looking for a set under a grand. I just found out World is about 3 miles from me. How do you like these heads?

I'm looking at the 72CC angled plug ones. The head I have now is casting #3970126. What kind of gains could I expect?
 

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I used to run Sportsman IIs and they were fine but I think there are better heads out there for the money these days.

I know money doesn't grow on trees but heads are the single most important purchase you will make for your car. I always recomend guys just put off the the purchase until you have another $400 in the budget. That's the difference between a decent head and a killer head in many cases.

In the long, long run you are better off buying the best head you can get the first time. I bought the Sportsman IIs on a budget then ended up with the AFR heads a few years later. I dropped my e.t. .15 in the 1/8th but I took a beating selling the old heads... Check out the AFR Eliminators, they will make you drool! JMHO.
 

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What are the specs on your engine? What is your current heads and static CR? Difference between a 72cc and 64cc head on a 350 is 1.2 CR!! This can make a huge difference. We need details mainly your current piston deck height, piston relief cc, current head gasket compressed size, current head chamber size, current valve size, then we could give you details as to what will do what.
 

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Discussion Starter · #6 ·
What are the specs on your engine? What is your current heads and static CR? Difference between a 72cc and 64cc head on a 350 is 1.2 CR!! This can make a huge difference. We need details mainly your current piston deck height, piston relief cc, current head gasket compressed size, current head chamber size, current valve size, then we could give you details as to what will do what.
- +3 cc dome piston
- 30 over
- Comp cam 280H
- .022 piston in the hole
- .039 head gasket
- 1.94 stock cast heads, 76CC
 

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Those values reveal a static compress of 8.9:1 (76cc, .039 gasket)
72cc would get you 9.32:1 (.039 gasket size)
72cc would get you 9.85:1 (Felpro 1094 .015 Gasket)
64cc would get you 10.2:1 (.039 gasket size)

Current 76cc heads at 8.9:1, 600cfm carb, small tube headers, dual plane manifold gives you: 303hp at 5000 rpm, 342 torque at 4000 rpm

Change to 72cc (9.32:1) results in : 360hp at 5500 rpm, 370 torque at 4500 rpm
Change to 72cc (9.85:1) results in : 369hp at 5500 rpm, 377 torque at 4500 rpm
Change to 64cc (10.2:1) results in : 374hp at 5500 rpm, 382 torque at 4500 rpm

Emailing you the PDF
 

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Discussion Starter · #9 ·
Those values reveal a static compress of 8.9:1 (76cc, .039 gasket)
72cc would get you 9.32:1 (.039 gasket size)
72cc would get you 9.85:1 (Felpro 1094 .015 Gasket)
64cc would get you 10.2:1 (.039 gasket size)

Current 76cc heads at 8.9:1, 600cfm carb, small tube headers, dual plane manifold gives you: 303hp at 5000 rpm, 342 torque at 4000 rpm

Change to 72cc (9.32:1) results in : 360hp at 5500 rpm, 370 torque at 4500 rpm
Change to 72cc (9.85:1) results in : 369hp at 5500 rpm, 377 torque at 4500 rpm
Change to 64cc (10.2:1) results in : 374hp at 5500 rpm, 382 torque at 4500 rpm

Emailing you the PDF

Cool. I think you put the stroke in for a 302. I believe a 350 stroke is 3.48. The carb is a Holley 670 .Can you run that?


thanks
 

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i have the 64cc angle heads.i had them angle milled 100 thansants to raise compress more.they picked me up about 3 tenths in the 1/8th over a set a set of 186 casting ,with a good port job.i like the heads fine but they are a heavy casting so you will add some weight.i now have the arf 210s and i picked up 2 tenths over the sportsmans and the same over a set of 215 iron eagles ,with a motor that has less compresstion.im just guessing now but i feel the arfs would have been good for aother tenth over the sportsman if i would have raised the compresion to the same level as the engine the other heads where on.
 

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Damn how'd that stroke get set wrong! I swear the software did it!! Ok 670 carb


Current 76cc heads at 8.9:1, 670cfm carb, small tube headers, dual plane manifold gives you: 360hp at 5500 rpm, 383 torque at 4500 rpm

Change to 72cc (9.32:1) results in : 369hp at 5500 rpm, 389 torque at 4500 rpm
Change to 72cc (9.85:1) results in : 378hp at 5500 rpm, 398 torque at 4500 rpm
Change to 64cc (10.2:1) results in : 384hp at 5500 rpm, 403 torque at 4500 rpm
 

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Discussion Starter · #13 ·
Damn how'd that stroke get set wrong! I swear the software did it!! Ok 670 carb


Current 76cc heads at 8.9:1, 670cfm carb, small tube headers, dual plane manifold gives you: 360hp at 5500 rpm, 383 torque at 4500 rpm

Change to 72cc (9.32:1) results in : 369hp at 5500 rpm, 389 torque at 4500 rpm
Change to 72cc (9.85:1) results in : 378hp at 5500 rpm, 398 torque at 4500 rpm
Change to 64cc (10.2:1) results in : 384hp at 5500 rpm, 403 torque at 4500 rpm

Why am I getting more comp? I am getting 11.51:1 with 64CC and 10.48:1 with the 72CC. Here... http://www.angelfire.com/fl/procrastination/motor.html

Cylinder Diameter 4.030
Stroke Length 3.48
Number of cylinders 8
Chamber in cc's 64
Piston dome in cc's (Dome = positive, ) +3cc
Gasket Thickness in inches .039
 

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Discussion Starter · #16 ·

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Well I have no idea what compression you have given that 6 different sites/software programs gave 5 different readings!

In any case, as for alum heads, the Edelbrock Performer EDL-60909 (64cc) run $519/each or the EDL-60719 (70cc) which I run on my 383 are $509/each at Summit Racing

Summit also offers their own line (64cc Alum) for $949/pair SUM-162111 or (62cc Alum) SUM-162109 for $949/pair
 

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Your quench at .061 isn't doing you any favors - as suggested, get a thinner head gasket and you'll make more power plus it should help ward off detonation. For the money, there are better heads out there. Most of World's stuff is souped-up stock style stuff, they don't get the power or flow numbers out of their heads than the competition does. For around a grand, I'd look at either some Iron Eagles, Vortecs or Brodix IK's.
 

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