To day and yesterday I have performed a visual qualitiy check on these ProComps (#PC3003S). I have taken a lot pics and made my personal notes based on fact findings. Next I'll do the liquid volume test on all runners and combustion chambers.

When I did the gasket alignment, using the FelPro #1003 head gaskets there is a larger water passage than what was shown on the blown gasket. Taking in to consideration, at the time of posting I have no maching shortblock available, I would say that this will not be an issue here. The #1003s and the ProComps have a perfect match. Both cylinder heads are tested.






rgds
Arne

 

How can you say that when you must have somebody doing the porting for you? Get real, this is a technical forum, not facebook....
A.

 

This was by no means the first engine I have built, in fact this last engine was the 10th that I can recall. The only work I do not do myself in the machining. But this does not mean I do not understand how to do the work, rather I do not have those particular tools and I have enough money to let a real professional do it right, unlike you.
The funny thing here, and what made me chime in, is that you DO have a forum of technical experts that are telling you the truth, there junk junk junk,,,,, and you just simply do not want to believe it. I understand how you feel, I too made a mistake here once and was brought to the table for it. These guys are pretty damn smart and knowledgeable. They live eat and breath this stuff. And yes the heads are very pretty and shiny and most ricers believe this adds 100 HP.
O, and I may have a friend that has a awesome Yugo for sale.

 

Are the seats well centered with the valve? Dont see any seat protuding past the exhaust valve on the cylinder on the right, looks off center. Might just be the photo. The steel seat should be uniform and visable all the way around each valve.You bought them, you are going to use them, Hope they are everything you expect!

 

More that 10 builds, you must be an expert!.... my advice to you is read more and post less. Read this thread and let your expert friends explain the technical content for you. Here is some "China-junk" tested on BBC... be my guest!

best regards
Arne

http://speedtalk.com/forum/viewtopic...pro+comp+heads

 

Read the post. OP says he would get 150 more HP out of Edlebrock heads. Wonder what AFR's would do? Also wonder why they chose to run a Jesel shaft rocker system instead of a Pro Comp? Those Big Block power numbers are deceiving. I recently sold a 540 on here. Hydraulic roller cam, 10 to 1 street motor with Dart Iron 308 heads. Not a real radical build. Just a nice streetable engine. 777 HP on pump gas.

 

No they are all centered correctly. The pics have a slight lens distortion in macro setting. I have by no means expected every thing to be correct with these heads, if so I had not taken the step to check it all. So far i found very little to put my finger on. The runners are very good to be as cast and does not resemble at all from the horror pics repeatly being posted in ProComps and Patriots threads. I may post some pics if you guys want me to do so, but I am not sure if you guys care at all if the runners are good or not. It seems like you already have made up your minds that all these are crap.
rgds
Arne

 

What's this?

 

Not to get into this discussion on either side, I would like to see more pics.

 

Expert? no... but it seems I listen and understand better than you..you need to go back and re-read your own post above... 150 more from Edelbrocks?

 

Guys i agree with both,first off i had these heads and they are just find,better then my stock 202 double hump 69 heads,but thats it a little better the them.They arnt as good as the,afrs,trickflows,darts,etc.
But thats not what arneoe wanted,he wanted what he bought and im sure they will run just fine.You should ,if you buy them check them out real good because the foreign companies have low cost people working for them and sometimes theres mistakes made.people doing these heads are not pros.Arneoe they will run great for you has long as the heads are error free. personally i went to victor jr heads on my new engine,i wanted alot more hp I never posted about the use of these heads because i know theres people who just cant use them on here and i understand them,just didnt want to argue .

 

I wonder if those big block heads were just bolted on out of the box, with all those gauges and fixtures and special measuring equipment in those pics...I wonder ?

 

The PC#3003s are told to be of a newer cast. I have not tried to prove the justification in this statement, but it seems to me that the cylinder heads I have received do not look like those being frequently posted by the hardcore disbelievers that wants ruin my thread here on CF. It might be true that those are of ealier cast.

All combustion chambers had a good even surface and without blemishes of any kind. The valves were evenly seated and correctly spaced. I noticed that there was a 0.7mm hight difference between I/E measured on top of the stems. I don’t think that will make any difference to the valve train geometry, but the valves have to go out anyway and probably replaced before I install the heads on the block. The valves are at least good for blanks when doing the combustion chambers.



I inspected all threaded bolt holes and found no inperfections exept for the rocker bolt hole. It was drilled half thru the intake runner, see pic. This must be observed and fixed prior to installation. Burr edge must be removed and rocker bolts theads poperly sealed. Easy fix, no worries.



I got a posted comment about the rough machined pushrod enterance. I tend to ignore such inperfections, but is amasingly what a handfile can do.



The intake runners are of as cast. They have a nice and eaven surface and show no visible imperfections. Very little work is needed to make them perfect. Honestly I would not hesitate let them be without any modification. I have not done, and probably will not do, any flow test. I just do my own road test to find out how good they are. From what I can judge they will do fine for most of us. They are little too big (210cc) for my XE-268H camshaft, but that will do for now. At the time of posting, I have not liquid measured any of the caveties to check if the given data is correct. Hopefully the intake runner smaller and the combustion chambers are larger, I cross my fingers.



The exhaust runners are also of good surface quality as for the intake runners. They are of square shape and will not match oval 1 5/8” headers without modifications. Round- or D-shaped primaries will probably make a better fit.



All milled surfaces were inspected. The surfaces were of good quality and all gaskets did fit-up nicely.

The cast aluminum had a nice greyish surface treatment and they looked pretty nice to my eyes.

This is what I have so far. I’ll put them aside for a while, knowning I have porting job to do in my spare time.

Best regards and happy Easter hollydays to all of you!
Arne

 

I find this topic very interesting but think it could you less with the personal attacks. It is polluting this thread.
I think no one is expecting the "greatest heads in the world" (say it like Clarkson). Especially Arne, I think he realizes that cheap comes at a prize. I don't think he is going to drag race with them.

I have a question for the AAA-head lovers. Is it true AAA-heads never have casting flaws, and never blow up?

 

Nice Pics Arne, gonna take the Pro-Comp wagon out and see if we can run better than 9.90@138

Just keep trying to blow her up! Doesn't seem to be cooperating. Go figure?... and with such Junk Heads!

Sure the AFR Headed motor runs .5 second faster, but that only cost and additional $20,000 over the wagons motor.

Hopefully more posters will start posting more upbeat and positive encouragement.

 

I'm sure there's plenty of posts out there already comparing your heads. Where are they cast, btw? Where are they machined? what valves do they use again? What springs? Go USA or go home. please answer the questions if you dare. I know where Brodixes are cast. I know the valves they use. I don't doubt they stand behind their product. You offer a money back guarantee, if your not satisfied,, " Mr. Procomp" I didn't think so,, where were they cast again???

 

Do you want me to explain that for you? I think you should ask your expert friends to open up an engine to show you how it looks like from the inside.

 

Enjoy your Heads........

 

What can't be seen by the naked eye can cause the most problems. Do you have a machinist's straight edge and all the measuring tools to check these heads properly or are you going to eyeball them ?

A machinist familiar with small block chevy heads should go through them for you. He will pick up things you might miss.

You say you are already replacing the valves ? Now the price is going up and you still have Chinese heads.

This is not a personal attack, I actually post to help other forum members, one way to help them is to tell them things I have experienced. If I can steer someone away from buying something that I know is no good then I am helping not attacking the person. The info I pass on is always first hand experience, no books, no hearsay, only what I know from what I have seen. In this case it was not clear in the original post that the heads had already been bought and the OP was only looking for positive comments on his purchase

 

The test I have done so far is a visual test as described. I have also told you what I plan do. I have all necessary testing and measuring tools available if needed. I don’t feel the need to consult the local GM dealer for help because we have the facilities and expertise in house at work. This is not going to become a screening or destructive test. I think that is to take it a little too far, if you see my objectives. I have one crate 383, which I want slightly modify for street use, plus a 350 stock I am going to rebuild. One pair of Procomps is bought, two pairs of smog iron heads are dwelling on my workbench, and I planning to buy the fourth pair. That is going to be a Vortec type of some brand…. Most likely it will be a second pair of Procoms. I have no agenda when I published my first findings and you must all take it for what it is and make up your private minds. This has been an unpleasant experience from the very start off. However I feel somewhat obliged to tell you the facts, when I have my hands on the very cylinder heads, a lot you speak so negatively about. Some of it may be true, but it does not apply to the pair of Procomps I have inspected. That is for sure. I think many of you have scared people off so that valuable information is not being posted. That is a pity because the Procomps, Patriot and other such brands are selling in waste numbers these days, and users will have experienced how good or bad these brands really are. As I said earlier, I probably am wasting my time posting here on CF. I rather spend my time in the workshop or spending my free time on forums with more friendly people, people that speak my language and do not post rude or impolite messages.
Best regards
Arne