Procomp aluminum heads/ kmj performance heads

[70chevybb]

I am interested in knowing if anyone has used these heads and if they are anygood ?

Thanks, Wes

[rspears]

I am interested in knowing if anyone has used these heads and if they are anygood ?

Thanks, Wes

Wes,
Not a BBC, but I had my engine done bySehr Performance Machine Engine Rebuilding Specialists and Scott likes the ProComp heads because they have a lot of meat to allow him to bowl port the chambers as he likes to do. However, he buys the bare heads, and then builds them up with quality valves, springs, retainers & rockers as opposed to buying complete units from ProComp. Not sure I would buy complete heads from them.

[1gary]

Hey Wes-with all the head companies out there,a direct answer is when you price shop and then expect to get something for nothing,this situation isn't any different than anything else you buy where you get what you pay for.

One certain fact is the lower dollar head companies DO NOT have the R&D programs that you pay of in the price in the bigger brand name companies.

The days of a neanderthal caveman with a die grinder thinking he can match yrs of flow-bench research and CNC porting is just a silly notion.For one thing to match port to port and let alone head is head with a die grinder the percentage isn't in favor of hand porting.

If you choose a BBC,you should do so understanding and accepting the heads are going to cost you alot more than a SBC.

[rspears]

C'mon now Gary, so you're calling a guy who makes his living building custom, high horsepower, high efficiency engines that hold several NHRA and Sprint Car records and has engines running Bonneville a "neanderthal (your spelling) caveman with a die grinder"? Geesh, I gotta say you've got some nerve.

[pat mccarthy]

there is things about the head i do not like .port size will not match any thing out of the box . head chamber will only seal with a 4.625 fire ring head gasket not to big of a deal were your useing a 4.600 bore bbc but i would never use them heads on any thing that big of bore the 396-496 so with a 4.125to 4.310 .that chamber is to far off . them two things stop me . there are many heads i can get and for the price i can get them for i have a very hard time wanting to spend added time on a sub quality part making it work when there is stuff out of the box that fits better

[1gary]

C'mon now Gary, so you're calling a guy who makes his living building custom, high horsepower, high efficiency engines that hold several NHRA and Sprint Car records and has engines running Bonneville a "neanderthal (your spelling) caveman with a die grinder"? Geesh, I gotta say you've got some nerve.

Just the messenger Roger.I wish I could find the series of articles from the trades magazine Engines builder and how advanced porting has gotten,but some guys haven't.
We have had our share of national and regional wins.Surely you don't think I am guessing...........Hell all total I got what 50 yrs in drag racing and it's about time it is accepted.So it sounds like a duck and smells like a duck,well it's a duck.

[1gary]

BTW-I posted at the same time or alittle after you Roger.So I didn't know what you said until afterwards.What gets me going is all those guys that with some head manufactures guy's who think they are getting "A Deal" and how much B.S. that really is.We campaign a RED and a 9.90 car that we built and on any given day I dare say we could and do win.

[pat mccarthy]

i deal with alot of dart heads for customers there is no free lunch on heads most of the big power guys we are useing Pro 1 cnc heads and there as good heads out there as darts RMS .Profile. AFR . are the makers that i would use if not for me getting the darts as i like money staying in MI or at least the USA. if i can ...as a engine builder i under stand the fact that there much cheaper heads and many guys want THE LOOK i given much thought of building a 496 crate engine with all the lower dollar stuff were the rub comes in as alot of the stuff is not worth the time getting it to fit

[rspears]

BTW-I posted at the same time or alittle after you Roger.So I didn't know what you said until afterwards.What gets me going is all those guys that with some head manufactures guy's who think they are getting "A Deal" and how much B.S. that really is.We campaign a RED and a 9.90 car that we built and on any given day I dare say we could and do win.

I'm sorry, Gary, but I'm not foolish enough to believe that you posted almost 15 minutes later and did not read the post. One or two minutes, maybe, but thirteen's a stretch. Regardless, it's not worth the time taken to type, so we'll call it done and gone.

Wes, you can trust what Pat McCarthy says 100%, especially anything having to do with a BBC. In fact, you'd be well advised to call him and see what he can do for you on a set of built out heads. He knows of what he speaks, and that's a fact.

[1gary]

I'm sorry, Gary, but I'm not foolish enough to believe that you posted almost 15 minutes later and did not read the post. One or two minutes, maybe, but thirteen's a stretch. Regardless, it's not worth the time taken to type, so we'll call it done and gone.

Wes, you can trust what Pat McCarthy says 100%, especially anything having to do with a BBC. In fact, you'd be well advised to call him and see what he can do for you on a set of built out heads. He knows of what he speaks, and that's a fact.

Honestly I am just shaking my head.You guys treat this like some sort of high school popularity contest.
I have spoken to Pat on the phone and I do indorse his advise as well.

One thing that you should take into account,is what I said.Most street driven cars don't know with a given choice they made is what they are missing.Well those that don't use a chassis dyno or on a given cruise night run into a guy who has matched everything up making you wonder why you don't run as good.

We have for many yrs in our parts business supplied god knows how many customers.

[1gary]

Roger-don't even think about calling me a lie'er.I didn't see you post until after mine.Remember me saying how the stroke I had effected my left hand slowing down my typing??.Well that is what happened and a fact.

[jerry clayton]

I wouldn't use them---mostly we use Dart and also some afr heads--they been in the racing and head business for years(ever since the rules were changed to where you didn't have to use a factory head)(in fact, Dart and AFR are probably the reasons the rules got changed)
These guys have been in racing from day 1 and all the BS has been engineered out of there product---It isn't done because of cheaper imported castings, a random cnc machine or the offshoot of a family business that manufactures something else---

[Dave Severson]

Yeah, what Pat and Jerry said! If you're looking for an out of the box performance head, I don't think Pro Comp would be my choice. They're cheap, but other then that they don't really have a lot going for them unless you're looking for a bare casting to turn over to a good cylinder head shop and have built for your engine.

[1gary]

Yepper Pat,Jerry,Dave and I all agree.

[70chevybb]

I did not want to start a problem thread. I am restoring a 70 chevy 2wd truck. I am building this as a daily driver. I will be putting in a 402 .030 over with .180 dome pistons and possibly cast iron 116 c.c.(Ithink) chamber heads. I am going to use edelbrock performer rpm cam, intake and carb with a 700r4 and 3.73 gear. I just want a really goog running truck. I just thought the aluminum heads might be worth the money. I do know you get what you pay for. I have a set of 272292 casting heads I was going to use. Can anyone tell me what c.c. the chambers are?

Thanks, Wes