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results of procomp heads dyno test


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Lord, what a nightmare. Think about the poor sap that purchases these heads to bolt onto his hotrod, and doesn't have a dyno to fall back on for analysis. I wonder how many other vendor heads have this same issue.

I hope and pray (and honestly believe) that the AFR heads I bought match my expectations and promotional data.

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I dont understand some venders. As fast as news travels on the net, there is no reason to be stiff necked when your reputation is at stake.

 

What I dont understand is why this guys mechanic utilized such a low SCR along w/such a small duration/small overlap cam.

 

With such a low SCR and small cam the 216's, which were suppose to be the 195's, are definately too large. If SCR were increased and a longer duration cam installed the 400+ should've been easily reached....cant speak for the possibly screwed up machining to said cylinder heads: apparently Procomp isnt going to touch their mistake either(?).

 

I see the A/F for the engine on the link but did not see the CFM Flow Chart for the heads which the link said was given; anyone know the Flow for these heads?

 

If Procomp doesnt clear up the bad machining allegation - their reputation will be mud. Word of mouth, er-uh the keyboard will ruin their sales.

 

I dont see why someone would spend that much on heads, and not go with the current leaders Grumpy listed.

 

I hate war stories; not good for anyone!

 

Kevin,

(Yea,Still an Inliner)

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I'd like to throw Canfield into the mix of heads that ought to be on the list. Just make sure that you buy heads that are machined by Canfield. (See the threads below for details.) I don't have any dyno or 1/4 mile times, but seat of the pants from having my 406 in the car with the Canfields and a good size solid roller with no real tuning told me that the heads are working very well.

 

See the posts below for some info:

 

http://forums.hybridz.org/showthread.php?t=80497

 

http://forums.hybridz.org/showthread.php?t=80680

 

http://forums.hybridz.org/showthread.php?t=81935

 

http://forums.hybridz.org/showthread.php?t=85464

 

http://forums.hybridz.org/showthread.php?t=85482

 

http://forums.hybridz.org/showthread.php?t=85663

 

(Note, my engine build up is discussed, but changed - I went with a solid roller and stud girdle.)

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Pete is right on, I had a set of 200cc Canfields on my 383 for 3 plus years and was very happy with them. Ran a best of 10.80 at 125 on that combo.

 

I now have a set of the AFR 210 Eliminators and like them as well. Ran a new all motor best today of 10.56 at 128.34...too bad I busted another stub axle today!

 

Mike

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WHILE THERES NO DOUBT you can get very good results from dart HEADS, ...I DON,T LIKE thier casting quality or machine work on SOME, but not all of the dart heads Ive worked with, there seems to be a good deal of variation on DART heads, and I find that to be a problem, as Ive had both excellent results and heads that looked like a third world machinist worked on them

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WHILE THERES NO DOUBT you can get very good results from dart HEADS, ...I DON,T LIKE thier casting quality or machine work on SOME, but not all of the dart heads Ive worked with, there seems to be a good deal of variation on DART heads, and I find that to be a problem, as Ive had both excellent results and heads that looked like a third world machinist worked on them
Thanks for the info. Jerry
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One more thing to show that you get what you pay for.

 

Really don't think that applies here, bud.

 

On another note, I'm looking to get some new Edelbrock Alum Heads sooner than later, and am wondering if you, Grumpyvette (since you seem to be the "Head-Guy") knew of similar priced heads that were maybe better than mediocre Edelbrocks. Mediocre, meaning one of their intro series... Performer/Performer RPM's. Thanks man

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Really don't think that applies here, bud.

 

On another note, I'm looking to get some new Edelbrock Alum Heads sooner than later, and am wondering if you, Grumpyvette (since you seem to be the "Head-Guy") knew of similar priced heads that were maybe better than mediocre Edelbrocks. Mediocre, meaning one of their intro series... Performer/Performer RPM's. Thanks man

 

yes that does apply, because procomps are roughly only 750-800 dollars a set of Al heads compared to the 1300 afr's and 1500 for the afr eliminators. Other Al heads are around 1000-1200. And if your looking at a new set of heads I would not go with edelbrock because they do not really flow that well compared to afrs and afrs 195's are only 200 more I believe.

http://airflowresearch.com/195sbc_sh.php

http://www.purplesagetradingpost.com/sumner/techinfo/heads1.html#Edelbrock%20RPM

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My one experience (which is for a big block) is Brodix, from their Race-Rite series. Comparing what I have with anecdotal evidence on the others, I’d say that quality is above-average, but not exceptional. The CNC’d combustion chambers have a definite “staircase†pattern, the rocker studs protrude into the intake ports and the deck has ~1/4â€-deep marks from a 1/2" drill, evidently used to secure the heads when doing the CNCing. However, the casting quality is very good and there are no fitment problems. The stock exhaust port and spark plug locations are a definite plus.

 

I went with Brodix because AFR simply refused to make oval-port BBC heads. Brodix flow numbers are great on the intake side (especially given their 271cc port volume), but mediocre on the exhaust side. This led me to a cam with strong exhaust bias - which is hopefully going to work out well.

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