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#1
10-11-2013, 12:18 AM
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pro comp heads
Hi guys, Has anyone used a set of pro comp bbc heads? Was checking them out and was wondering if anyone here had used them. Im currently build a 427 bored .030 over with KB 176 pistons and wanna run a .520 lift cam. Any info would be appreciated. Thanks
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1968 Chevelle 427 BBC Muncie 4 speed Rats Rule 
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#2
10-11-2013, 02:10 AM
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Re: pro comp heads
Your money can be <span style="font-weight: bold">far</span> better spent elsewhere.
What are your specific performance goals?
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#5
10-15-2013, 09:32 PM
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Re: pro comp heads
What kind of e.t's are you looking to run, and what does your car weigh?
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#6
10-16-2013, 02:27 PM
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Re: pro comp heads
While the castings themselves aren't terrible, the Pro Comp heads leave a little to be desired.
The valve guide material is junk. We have seen several sets ground away by the valve stems in just a few thousand miles. Also, seat machining isn't very consistent. As a comparison, my 540 is equipped with a roller cam, flat top pistons and LS6 cast heads. H.P. is 704 on pump gas. The 69 Camaro, that I posted pictures of under the Chevrolet section, has a 540 with a similar roller cam, flat top pistons and Pro Comp heads. H.P. on pump gas is 738. Also keep in mind, this customer had to pay the machine shop to replace all the guides and redo the seats. Not a bargain in the end.
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It's not the critic that counts, not the man who points out how the strong man stumbled or whether the doer of deeds could have done them better...
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#7
10-16-2013, 02:38 PM
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Re: pro comp heads
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Hemicolt</div><div class="ubbcode-body">While the castings themselves aren't terrible, the Pro Comp heads leave a little to be desired.
The valve guide material is junk. We have seen several sets ground away by the valve stems in just a few thousand miles. Also, seat machining isn't very consistent. As a comparison, my 540 is equipped with a roller cam, flat top pistons and LS6 cast heads. H.P. is 704 on pump gas. The 69 Camaro, that I posted pictures of under the Chevrolet section, has a 540 with a similar roller cam, flat top pistons and Pro Comp heads. H.P. on pump gas is 738. Also keep in mind, this customer had to pay the machine shop to replace all the guides and redo the seats. Not a bargain in the end. </div></div> Tracy, your response mimics what I've been told of the Pro Comp heads. By the time you make the heads "right", you would have been better off buying a set of AFR or Brodix heads for example. I've also heard the aluminum for the Pro Comp heads isn't as strong. Kurt
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 1969 SS396 Post Sedan Delivered to Van-T Topeka KS MCACN Day2 Concourse Gold Award 1965 VW El Lobo Dune Buggy built in the mid 70’s for the Iowa Shriners 1968 Schwinn Orange Krate 1969 Schwinn Pea Picker 1968 Schwinn 5-Speed 1970 Schwinn 3-Speed Deluxe 1972 Schwinn 10-Speed Continental 1973 Schwinn 5-Speed Suburban All Original Paint Bikes
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#8
10-16-2013, 02:53 PM
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Re: pro comp heads
IMHO, a good set of factory heads would work fine, especially no bigger of a cam than you're looking at...matter of fact, a good set of oval ports is a pretty formidable setup.
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#10
10-16-2013, 03:31 PM
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Re: pro comp heads
Most reasonable performance goals can easily be accomplished with factory castings. As long as you aren't starting out with a trashed set of factory heads, the cost should be reasonable.
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