1990LSx

iTrader: (9)

I ran a cross the article in Hot Rod magazine and the heads struck my interest.

http://www.hotrod.com/techarticles/e...der_head_test/

^^article right there


Now I know they tested a supplied set of heads from each manufacturer and that scares me. Were these Pro Comp heads a "worked" off the shelf set they sent in to glorify numbers?

I did a search and found not much data on these heads so for those who say "search is your friend" I made the effort to find more data before posting.

Any info would be greatly appreciated.

badazz81z28

iTrader: (6)

You're going to get mixed reviews. Most if not all negative will come from people who have never used them.

I would get what your budget allows

badazz81z28

iTrader: (6)

Oh yeah..... I would expect all of them to give their best product to test

2000PewterT/A

I have no experience with them but they seem to be pretty nice. I can't say about the quality since I never used or even seen on in person.

1990LSx

iTrader: (9)

My budget is not limited to the cost of these cylinder heads. However I am all in favor for HP per $. If I can make GOOD power with a less expensive cylinder head choice why not. I have never ruled out going against the grain on any product. My vehicles always run good but I do research and match parts that WORK regardless of their price range. The cylinder heads look really good however I know ProComp doesn't have the best rep among racers but I have bought some products with them with good luck. I would probably pass on their electronics but their cylinder heads seem to function. If I went that route I would definitely do a valve job and have the machine shop check the deck for 100% flatness.

1FastBrick

iTrader: (16)

Your in luck some one else on the board is trying them out... I am sure if you give it a few weeks he will have it running and can give you a better opinion of how they perform.

https://ls1tech.com/forums/generatio...-new-post.html

1990LSx

iTrader: (9)

Thanks! I will definitely stay tuned on that thread.

badazz81z28

iTrader: (6)

Most of the research you will find will be from unreliable sources. Like I said, most who have the worst things to say have not even ran them. Its always a friend of a friends uncles's brother in-law who "said". The rest hate pro-comp just because they are made somewhere besides the USA.

I have personally used Pro-Comps water pumps, distributers, and intakes with no issues what so ever. If the price was right and I was on a budget, I dont care where something is made. But if I have the cash, I always stick with the most popular.

96capricemgr

iTrader: (1)

I would open up your research to any heads made by them which might not tell you how the LS heads work but it should tell you something about company QC

64post

iTrader: (5)

I have looked at them at a trade show and they appear to be copies of 243-799 (rough)castings with their D shape exh. ports and more closed off C chambers. They claim 62 cc chambers which is good. They do have oversized swirl steps like stock heads which I think is bad for flow but with some work they likely would make decent flow. 2.02's and 1.60's I Have seen these on ebay for $400 for a bare set.

TurboMonte100

iTrader: (1)

I can't speak for the LS heads, but I have used their sbc and bbc heads with good success. Also I have bought from the feebay seller that has them for 389 or best offer, quick shipping and no problems. If I knew for sure they would with a 5.3, I would order a set today.

1990LSx

iTrader: (9)

Yeah I am interested in their version with the 2.055 valve that hotrod magazine tested. They threw down 629hp on an engine dyno on a 408 with 11-1 compression and a 232/240 duration cam.

An AFR 245 I believe was the only cylinder head to test higher and it was 631 peak hp

heads tested were TFS, AFR, TEA, DART etc

showvette

These are NOT the heads used in the Hot Rod article. These are Procomp 225 CC heads with 2.02"-1.55" valves. It was less than $700 for the pair shipped.

CFM FLOW NUMBERS
LIFT INTAKE EXHAUST
.100 67.9 54.0
.200 139.0 113.0
.300 201.1 157.6
.400 255.7 183.2
.500 286.1 197.6
.600 291.5 203.3
.650 293.3 206.6

BKsNHRA

iTrader: (4)

Any results?

96capricemgr

iTrader: (1)

Looks like a fake CNC job where the tool is just waved around to clean up the casting rather than do anything to actually improve flow.

NemeSS

iTrader: (127)

infor dyno/track results

2000PewterT/A

I hate to say it but that's what it looks like, hopefully I am proved wrong with some dyno results but I am not holding my breath.

JakeFusion

iTrader: (7)

Those have a whole lot of untouched areas in the head for it to be a 225cc port. My TEA heads are touched nearly everywhere and are 225cc ports.

1990LSx

iTrader: (9)

Mine were the exact heads as the ones tested and had far more CNC markings than that. They actually flowed as advertised. The only thing not as advertised was the combustion chamber which my local and very reputable machine shop measured at 71cc. We milled them down to get compression up to around 10.4-10.5.

showvette

Had the ports CCed today. Actually 240.8 CC. Done by very respected Pro Mod engine builder.