383 stroker
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
pro-com sucks, and lies.... do an internet search....
you would be better off with iron heads from World or Dart. the only atvantage of aluminum heads are .5 increase on C/R, and a weight reduction of about about 50lbs. just because there aluminum does not mean they are any good.
you would be better off with iron heads from World or Dart. the only atvantage of aluminum heads are .5 increase on C/R, and a weight reduction of about about 50lbs. just because there aluminum does not mean they are any good.
Le Mans Master
Joined: Oct 2010
Posts: 6,922
Likes: 839
From: melbourne florida
2023 C3 of the Year Finalist - Modified
pro-com sucks, and lies.... do an internet search....
you would be better off with iron heads from World or Dart. the only atvantage of aluminum heads are .5 increase on C/R, and a weight reduction of about about 50lbs. just because there aluminum does not mean they are any good.
you would be better off with iron heads from World or Dart. the only atvantage of aluminum heads are .5 increase on C/R, and a weight reduction of about about 50lbs. just because there aluminum does not mean they are any good.
there is nothing wrong with the current version of the pro-comp heads.
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
if they have changed that would be great... but until then I'll stick with AFR, Bordax, World, Dart and other well known reputable head manufactures.... jmho. there truly is a ton of bad stuff written about these pro-comp heads... i just would not want to be the gene-pig on such a major purchase.
Last edited by pauldana; Sep 11, 2013 at 11:11 PM.
Le Mans Master
Joined: Oct 2010
Posts: 6,922
Likes: 839
From: melbourne florida
2023 C3 of the Year Finalist - Modified
well actually i go out of my way to not buy california made products. you have no idea what was done to my heads , they were assembled and worked on by people i would stack up against anyone. and people i am sure know more than you if you are relying on a u tube video to make your point. no offense.
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
I can tell you I have worked with Pro Comp heads once. Three valve seats were misaligned with the seat bore in the chamber and/or the valve stem holes. No way to seat the valves without grinding into the aluminum on two.
The majority of the posters on this sight make their living building performance engines. If these heads were decent for 1/2 the money everyone would use them.
http://speedtalk.com/forum/viewtopic.php?f=1&t=33949
BTW I go out of my way to buy American products over Made in China. Guess that is just me.
The majority of the posters on this sight make their living building performance engines. If these heads were decent for 1/2 the money everyone would use them.
http://speedtalk.com/forum/viewtopic.php?f=1&t=33949
BTW I go out of my way to buy American products over Made in China. Guess that is just me.
Last edited by 63mako; Sep 12, 2013 at 01:27 AM.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
Everyone falls for "cheap".
Look what just happened to a member here building his 427 same chit.
you get what you pay for, folks. Least most the time lol.
Cant hate a person for being a junk dealer just know they dealing junk thats all. And thats what youre gonna get. Gotta chuckle at the "my car runs great" stuff...sure come check back in 15 or 20,000 mi
flame away
Look what just happened to a member here building his 427 same chit.
you get what you pay for, folks. Least most the time lol.
Cant hate a person for being a junk dealer just know they dealing junk thats all. And thats what youre gonna get. Gotta chuckle at the "my car runs great" stuff...sure come check back in 15 or 20,000 mi
flame away
Last edited by cv67; Sep 12, 2013 at 01:16 AM.
Le Mans Master
Joined: Oct 2010
Posts: 6,922
Likes: 839
From: melbourne florida
2023 C3 of the Year Finalist - Modified
i understand what is out there, i am not advocating buying out of the box anything. i have seen brodix and dart heads with issues too. my heads were purchased bare, machined ,checked , port worked and assembled with manley components. the seat concentricity was very good on these. so i see no need to worry . most of the issues with the pro comps are early castings and assembled units, when you make something so inexpensively of course there are probably going to be issues but if you use them as a basis they are fine. maybe I was a bit touchy about it , but it is unfair to attack someones choices without understanding the reason. i have been around enough and have more than ample background to know what I'm looking at. if you want an inexpensive set of castings the ones i have are very good . but, you probably will not be happy unless you pay to have someone go thru and check them out which will make your cost go up.thats my 10 cents, they are on the engine doing there job for several thousand miles and running beautifully .
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
you know.... everytime i have gone cheap, I have paid for it.... my 383 had a cast crank, it was a Skat, but it was cast and i snapped it,,,,,,, i went a cheaper radiator, it worked, but my no means the craftsmanship of my DeWitts.....and yea, i have other stories of going cheap...
Why buy a pair of heads you know you have to fix before you even take them out of the box?!?!?!
And even more to reccomend such junk to otheres?
My wife, Oxana, is from Russia, and they have a saying... loosely translated.... Cheap buys twice.
Why buy a pair of heads you know you have to fix before you even take them out of the box?!?!?!
And even more to reccomend such junk to otheres?
My wife, Oxana, is from Russia, and they have a saying... loosely translated.... Cheap buys twice.
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Le Mans Master
Joined: Oct 2010
Posts: 6,922
Likes: 839
From: melbourne florida
2023 C3 of the Year Finalist - Modified
there are very few engine parts that i use straight out of the box.
a guy that taught me a lot about racing and engines who held multiple national records had an expression he always repeated to me
"thats great,,,,,, If thats the best you can do" .I'm not an out of the box guy i love to take so called junk and make it work, i put my first set of tubes in a pair of small block chevy heads when i was 19. i made that same set of heads flow 300 c.f.m , and it took 3 cans of stop leak to seal them up, but thats how it was in the early 70's. i ran a mountain motor pro-stock car and match raced it for about 2 years but money was too tight and went back to plumbing. i crossed path with many racers whose names you'd know , and more you wouldn't. when somebody says i made a stupid choice based what some very gifted engine builders tell me i take exception, you can call me what you like i don't care, but when it concerns people I've known since i was a kid well then you stepped in it. I'm sorry if i came off a bit rough and I'm sorry for that. but sometimes its better to ask why, first
a guy that taught me a lot about racing and engines who held multiple national records had an expression he always repeated to me
"thats great,,,,,, If thats the best you can do" .I'm not an out of the box guy i love to take so called junk and make it work, i put my first set of tubes in a pair of small block chevy heads when i was 19. i made that same set of heads flow 300 c.f.m , and it took 3 cans of stop leak to seal them up, but thats how it was in the early 70's. i ran a mountain motor pro-stock car and match raced it for about 2 years but money was too tight and went back to plumbing. i crossed path with many racers whose names you'd know , and more you wouldn't. when somebody says i made a stupid choice based what some very gifted engine builders tell me i take exception, you can call me what you like i don't care, but when it concerns people I've known since i was a kid well then you stepped in it. I'm sorry if i came off a bit rough and I'm sorry for that. but sometimes its better to ask why, first
Le Mans Master
Joined: Oct 2010
Posts: 6,922
Likes: 839
From: melbourne florida
2023 C3 of the Year Finalist - Modified
http://j-performance.com/index.php?o...ask=view&id=48
these aren't what i have, but have the same foundation
these aren't what i have, but have the same foundation
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
http://j-performance.com/index.php?o...ask=view&id=48
these aren't what i have, but have the same foundation
these aren't what i have, but have the same foundation
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Le Mans Master
Joined: Oct 2010
Posts: 6,922
Likes: 839
From: melbourne florida
2023 C3 of the Year Finalist - Modified
http://www.j-performance.com/index.p...ask=view&id=55
it says these are there econo heads , weather or not they are cheap or not isn't the point these are thier econo heads. it also clearly says Pro-Comp castings. they are a reputable porter, are these heads also junk because of the pro comp castings? are the seats gonna fall out? are the guides crooked? do you think they would risk their reputation on junk castings? are my heads which are not out of the box also garbage? i think not. pro-comp did have problems when they first went on the market and i would certainly never buy them assembled , but the castings have a lot of potential, and can be a good basis to build on. i will keep my garbage.
it says these are there econo heads , weather or not they are cheap or not isn't the point these are thier econo heads. it also clearly says Pro-Comp castings. they are a reputable porter, are these heads also junk because of the pro comp castings? are the seats gonna fall out? are the guides crooked? do you think they would risk their reputation on junk castings? are my heads which are not out of the box also garbage? i think not. pro-comp did have problems when they first went on the market and i would certainly never buy them assembled , but the castings have a lot of potential, and can be a good basis to build on. i will keep my garbage.