Pro comp heads
Thread Starter
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Pro comp heads
Here is some info I picked up on another site in case someone is considering saving some money on their aluminum heads.
http://www.boatstoreonline.com/procomp.html
http://www.boatstoreonline.com/procomp.html
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Here is some info I picked up on another site in case someone is considering saving some money on their aluminum heads.
http://www.boatstoreonline.com/procomp.html
http://www.boatstoreonline.com/procomp.html
you can save some money up front.
Last edited by Little Mouse; Dec 1, 2007 at 03:41 AM.
Melting Slicks
Joined: Aug 2006
Posts: 3,429
Likes: 20
From: Kingston Ontario
Thread Starter
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
You probably wouldn't really notice it unless you disassemble the heads to check them before installing or bought bare castings. The varying chamber size would be a huge issue to the durability also. Would create an out of balance situation and possibly detonation issues on the small chambers. Again the guy putting them on out of the box would not know. You would have to CC the chambers to find it. I think ALL heads should be disassembled and checked closely before installing. My AFR's were too tight on the intake guides when disassembled and checked. Clearance was .001. Had to hone the guides on them. If I were to have just thrown them on out of the box could have possibly stuck a valve when brought up to operating temp. The chamber size, valve seats, castings, valves and flow were almost perfect though.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Well the bigger issue is the part where the seats are machined out to the aluminum. You probably wouldn't really notice it unless you disassemble the heads to check them before installing or bought bare castings. The varying chamber size would be a huge issue to the durability also. Would create an out of balance situation and possibly detonation issues on the small chambers. Again the guy putting them on out of the box would not know. You would have to CC the chambers to find it. I think ALL heads should be disassembled and checked closely before installing. My AFR's were too tight on the intake guides when disassembled and checked. Clearance was .001. Had to hone the guides on them. If I were to have just thrown them on out of the box could have possibly stuck a valve when brought up to operating temp. The chamber size, valve seats, castings, valves and flow were almost perfect though.
You probably wouldn't really notice it unless you disassemble the heads to check them before installing or bought bare castings. The varying chamber size would be a huge issue to the durability also. Would create an out of balance situation and possibly detonation issues on the small chambers. Again the guy putting them on out of the box would not know. You would have to CC the chambers to find it. I think ALL heads should be disassembled and checked closely before installing. My AFR's were too tight on the intake guides when disassembled and checked. Clearance was .001. Had to hone the guides on them. If I were to have just thrown them on out of the box could have possibly stuck a valve when brought up to operating temp. The chamber size, valve seats, castings, valves and flow were almost perfect though.there heads are so messed up you could end up with engine damage
and costly engine repairs.
Instructor
Joined: Mar 2005
Posts: 159
Likes: 0
From: American Canyon Ca
I have these heads on my 383. Runs strong, no problems after 2000miles. Builder goes through heads prior to assembly. http://www.mandrengines.com/store/pr...roducts_id=228 
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
You get what you pay for, when I buy heads I want them made in a country where the workers are familiar with the use of the end product. Brodix IK series or Canfield heads are reasonably priced USA made parts that WILL make MORE HP and last longer. There is metallurgy, chemistry, and maching aspects to making a sucessful cylinder head and if you think China has the edge on these science, be my guest and buy them on Fleabay for under $500 a set (probably going down to $400 next week 
)
)
Le Mans Master
Joined: Apr 2001
Posts: 5,941
Likes: 281
From: Was New Orleans but swam to Baton Rouge LA
Cruise-In IX Veteran
A buddy of mine got a set of those heads and regrets using them. You can definitely tell the difference in the metal used versus the more expensive heads.
Melting Slicks
Joined: May 2005
Posts: 2,486
Likes: 71
From: Elkhart Lake, Wisconsin
You get what you pay for, when I buy heads I want them made in a country where the workers are familiar with the use of the end product. Brodix IK series or Canfield heads are reasonably priced USA made parts that WILL make MORE HP and last longer. There is metallurgy, chemistry, and maching aspects to making a sucessful cylinder head and if you think China has the edge on these science, be my guest and buy them on Fleabay for under $500 a set (probably going down to $400 next week )
)
Thread Starter
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Well, I see the Boatstoreonline pulled their writeup ripping these heads. Must not have wanted to spend the legal fees. Thought we had freedom of the press in this country.
Team Owner
Joined: Apr 2002
Posts: 62,198
Likes: 1
From: All humans are vermin in the eyes of Guru VA
Cruise-In IV Veteran
Cruise-In V Veteran
I have these heads on my 383. Runs strong, no problems after 2000miles. Builder goes through heads prior to assembly. http://www.mandrengines.com/store/pr...roducts_id=228
