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post #1 of 18 (permalink) Old Nov 27th, 07, 1:20 AM Thread Starter
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interesting procomp heads dyno test

http://www.boatstoreonline.com/procomp.html
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post #2 of 18 (permalink) Old Nov 27th, 07, 2:17 AM
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Re: interesting procomp heads dyno test

Very interesting,makes me not want to look into those heads for a future budget build up.
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post #3 of 18 (permalink) Old Nov 27th, 07, 3:39 AM
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Re: interesting procomp heads dyno test

good story, couple problems.

Cast iron exhaust manifolds are killing HP on all heads

"600 BG carbs flows 900" I doubt it. The jet sizes they give wouldn't work with a 900 anyway. Aroma of fish here.

A lot of people were already calling the Procomp heads cheap China junk already, no surprises here. Looks to me like boatstoreonline isn't much better.

Tom
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post #4 of 18 (permalink) Old Nov 27th, 07, 8:29 AM
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Re: interesting procomp heads dyno test

I checked 'em out, big and small block.
Big block heads I looked over are thin, lightweight castings with inferior valve seats (thin) and poor core shift on the castings. Smallblocks would have taken hours just to clear the casting slag in the ports, hands-down the worst castings I've ever seen.
Junk, just like the boatstore said.

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post #5 of 18 (permalink) Old Nov 27th, 07, 9:17 AM
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Re: interesting procomp heads dyno test

I am so glad that I did not stay my usual, hard headed self and tried to make the BBC pair that I had work. I sold them and picked up a set of AFR 305's with 114cc CNC chambers from Wolfplace, among many other things. Thanks Mike!!

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post #6 of 18 (permalink) Old Nov 27th, 07, 10:17 AM
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Re: interesting procomp heads dyno test

Now thats quite a cam We stepped the cam up to 503/510 224/230 @.005 as I hope thats a type O.

The BSFC numbers don't look right either.
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post #7 of 18 (permalink) Old Nov 27th, 07, 10:44 AM
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Re: interesting procomp heads dyno test

Quote:
Originally Posted by CNC BLOCKS N/E View Post
Now thats quite a cam We stepped the cam up to 503/510 224/230 @.005 as I hope thats a type O.

The BSFC numbers don't look right either.
For a small block boat engine that doesn't sound too out of place to me? Especially shooting for 400hp with 383 cubes.

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post #8 of 18 (permalink) Old Nov 27th, 07, 10:49 AM
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Re: interesting procomp heads dyno test

Quote:
Originally Posted by CNC BLOCKS N/E View Post
Now thats quite a cam We stepped the cam up to 503/510 224/230 @.005 as I hope thats a type O.

The BSFC numbers don't look right either.

Quote:
Originally Posted by jbird View Post
For a small block boat engine that doesn't sound too out of place to me? Especially shooting for 400hp with 383 cubes.
224/230 at 5 thousands seems out of place to me as I wonder what it is at .050
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post #9 of 18 (permalink) Old Nov 27th, 07, 11:51 AM
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Re: interesting procomp heads dyno test

probably just a typo.

Tom
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post #10 of 18 (permalink) Old Nov 27th, 07, 10:48 PM
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Re: interesting procomp heads dyno test

Anybody notice the numbers between the Vortec head and the IK180.

For the money, I believe I'd spend and hour or two on the Flowbench with the Vortecs and put a fresh valve job on them and let 'em rip.

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post #11 of 18 (permalink) Old Nov 28th, 07, 1:27 AM
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Re: interesting procomp heads dyno test

Quote:
Originally Posted by DragRacer View Post
Anybody notice the numbers between the Vortec head and the IK180.

For the money, I believe I'd spend and hour or two on the Flowbench with the Vortecs and put a fresh valve job on them and let 'em rip.
That's exactly what I was thinking. Especially since they said the pushrods were incorrect on the Vortecs and they were using stamped steel rockers instead of rollers.

In Brodix's defense...I'm sure if they were turning more than 6000 RPM the differences between the Vortecs and IK180's would be quite a bit bigger though. Still, kinda makes you wonder.
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post #12 of 18 (permalink) Old Nov 28th, 07, 3:16 AM
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Re: interesting procomp heads dyno test

And to think I almost bought a set of Procomp before I settled on the IK200's

I'm sure the .005 number was supposed to .050

Vortecs are some good flowing heads. The Brodix heads picking up 18hp over them at the same rpm is pretty good in my book. Those IK's are a cheap replacement head (IK = Iron Killer) that seems to run pretty good. And I agree, if they were turning more RPM, the IK's would walk away from them.

Building a street engine to similiar specs, one would have to consider total cost whether it would be cheaper to go with vortecs and do all the necessary mods to get a decent spring on them or a head such as the IK series. The vortec does require a specific manifold so that can't be over looked.

Ray
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post #13 of 18 (permalink) Old Nov 28th, 07, 1:10 PM
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Re: interesting procomp heads dyno test

Quote:
Originally Posted by CNC BLOCKS N/E View Post
224/230 at 5 thousands seems out of place to me as I wonder what it is at .050
I actually didn't even notice the typo. Pretty obvious it should read .050".

Jay Campbell
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post #14 of 18 (permalink) Old Nov 28th, 07, 4:11 PM
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Re: interesting procomp heads dyno test

A friend of mine has a 392" sbf in a Ranger that had World iron heads on it. They "stepped up" to the Pro Comp heads and lost 1/2 second...

They put the World heads back on and got their lost ET back and then eventually went w/ some AFR's and picked up over 1/2 sec over the World heads. Lesson learned...

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post #15 of 18 (permalink) Old Nov 28th, 07, 6:03 PM
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Re: interesting procomp heads dyno test

A good friend of mine bought a set of the pro-comp heads and bolted them on his blown 383.
The 383 had a 4340 assembly,SRP blower pistons,custom ground mech. roller blower cam,the CNC Pro-comp heads with a 215 cc port volume,2.0/1.6 valves,
pair of flowed 750 dp's on top of a 8-71 from the Blower Shop.
This engine was a max. effort for 92 pump gas.
Pull after pull with the Pro comp heads the best he could do was 588 hp.
He sold the heads and I told him to try a set of the 220 AFR heads.
He bolts them on and goes back to the dyno.
His first pull was 633 hp with no tunning.
He then say's the timing was only at 27* total and his A/F ratio was way fat.
Of course of think he is full of BS.
He then calls me back after he drops 3 jet sizes out of the front and 4 jet sizes out of the back of both carbs and then takes his timing to 33* total he also advanced the cam 4 degree's.
With all the tunning he claims it now went 662 hp.
I have never seen the dyno sheets maybe he really was telling the truth??
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