ProComp190 (68/64cc)
Le Mans Master
Joined: Sep 2000
Posts: 9,078
Likes: 7
From: DFW TX
Cruise-In VII Veteran
St. Jude Donor '07
In this case, the thread starter should install the heads he bought and let us know how they work out. Not second guess his instinct like he is doing know.
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Joined: Jul 2008
Posts: 87
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From: Hokksund, Norway
What a pleasant surprise!
I received my ProComp cylinder heads this afternoon. I now have hands on and can judge for my self what all this is about. I bought the pair from GR8HOTRODS.COM on eBay to my full satisfaction. Swift and responsive seller, no wonder they have achieved 100% feedback. The pair is ProComp PC3003S, 210cc with 64cc chambers and straight plugs. They were a little “bigger” than first planned, but that’s OK …no worries!…. At a first glance I can state that the cast and machining is of very high quality and there won’t be much porting needed. I am looking forward to install these lovely cylinder heads on my 383.
Best regards
Arne
Best regards
Arne
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
Lucky you! Go and inspect the ProComps for your self. That is much better than being told off by self appointed experts, which never have had hands on these cylinder heads in their life. I suspect the ProComps to be OK for my use, possible for you as well....
Good luck to you as well!
Arne
Go and inspect the ProComps for your self. That is much better than being told off by self appointed experts, which never have had hands on these cylinder heads in their life. I suspect the ProComps to be OK for my use, possible for you as well....Good luck to you as well!
Arne
Burning Brakes
Joined: Feb 2005
Posts: 894
Likes: 91
PC3000 Series Heads
These heads have been "hammered" by many who never had the opportunity to build on ANY platform whatsoever!
We've experimented with a number of sets of these head!
I can give you all this, on a really "base" 383 SB, Comp retro-hyd cam, and "100 year old (or so)" Torker intake, you will get 450 HP and 440 Ft.Lbs. Torque with a "bolt-together" deal!
I have numerous dyno sheets here from these builds! Most are using a 10:1 C.R. With some porting and some add'l HP chasing, you can get up to the "500" number quite easily! A "solid-roller" platform by itself would add some 30/50, depending on the peripherals including a decent intake, possibly with an "HVH" series??
Thanks, Gary in N.Y.
P.S. Those numbers above are using the PC3001's, these are the angle-plug series, and NO porting whatsoever, not even a "slight" gasket match, and are now "getting the job done" in quite a few "rides"!
We've experimented with a number of sets of these head!
I can give you all this, on a really "base" 383 SB, Comp retro-hyd cam, and "100 year old (or so)" Torker intake, you will get 450 HP and 440 Ft.Lbs. Torque with a "bolt-together" deal!
I have numerous dyno sheets here from these builds! Most are using a 10:1 C.R. With some porting and some add'l HP chasing, you can get up to the "500" number quite easily! A "solid-roller" platform by itself would add some 30/50, depending on the peripherals including a decent intake, possibly with an "HVH" series??
Thanks, Gary in N.Y.
P.S. Those numbers above are using the PC3001's, these are the angle-plug series, and NO porting whatsoever, not even a "slight" gasket match, and are now "getting the job done" in quite a few "rides"!
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Joined: Jul 2008
Posts: 87
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From: Hokksund, Norway
These heads have been "hammered" by many who never had the opportunity to build on ANY platform whatsoever!
We've experimented with a number of sets of these head!
I can give you all this, on a really "base" 383 SB, Comp retro-hyd cam, and "100 year old (or so)" Torker intake, you will get 450 HP and 440 Ft.Lbs. Torque with a "bolt-together" deal!
I have numerous dyno sheets here from these builds! Most are using a 10:1 C.R. With some porting and some add'l HP chasing, you can get up to the "500" number quite easily! A "solid-roller" platform by itself would add some 30/50, depending on the peripherals including a decent intake, possibly with an "HVH" series??
Thanks, Gary in N.Y.
P.S. Those numbers above are using the PC3001's, these are the angle-plug series, and NO porting whatsoever, not even a "slight" gasket match, and are now "getting the job done" in quite a few "rides"!
We've experimented with a number of sets of these head!
I can give you all this, on a really "base" 383 SB, Comp retro-hyd cam, and "100 year old (or so)" Torker intake, you will get 450 HP and 440 Ft.Lbs. Torque with a "bolt-together" deal!
I have numerous dyno sheets here from these builds! Most are using a 10:1 C.R. With some porting and some add'l HP chasing, you can get up to the "500" number quite easily! A "solid-roller" platform by itself would add some 30/50, depending on the peripherals including a decent intake, possibly with an "HVH" series??
Thanks, Gary in N.Y.
P.S. Those numbers above are using the PC3001's, these are the angle-plug series, and NO porting whatsoever, not even a "slight" gasket match, and are now "getting the job done" in quite a few "rides"!
I think this is to be a good build from what I have seen so far. I'am very impress by the quality of these heads... the cast is perfect. I am planning next week to order another identical pair for my 350 build. I just have to find out what camshaft to use first. I think I need much higher lift this time.Best regards to all of you!
Arne
Race Director
Joined: Apr 2000
Posts: 17,665
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Glad you got them and are satisfied with them. Would you have any close up pics of the intake runner, exhaust port and combustion chamber ? 
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Thread Starter
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Joined: Jul 2008
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From: Hokksund, Norway
rgds
Arne
Racer
Joined: May 2008
Posts: 318
Likes: 0
From: Wheaton, Illinois
I agree w/ Motorhead & 63 Mako. I also researched these Pro Comps and only heard negative comments about them. Also, it sounds like you only want to hear good things about your cheap heads? One last thought, buy American.
Burning Brakes
Joined: May 2006
Posts: 893
Likes: 7
From: Hazerswoude-Rijndijk Zuid Holland
Sorry couldn't resist!!
Last thing American I bought where some bank stocks!! Is that representable for American made?
Lets wait and see where Arne brings us with these heads. Could be a (in) valuable lesson to be learned.
Good luck Arne.
Last thing American I bought where some bank stocks!! Is that representable for American made?
Lets wait and see where Arne brings us with these heads. Could be a (in) valuable lesson to be learned.
Good luck Arne.
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Joined: Jul 2008
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From: Hokksund, Norway
rgds
Arne
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Joined: Jul 2008
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From: Hokksund, Norway
If your research is based on hearing comments, and that's how you do things over there ....no wonder you guys got problems .....
Race Director
Joined: Apr 2000
Posts: 17,665
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Drifting
Joined: Aug 2005
Posts: 1,682
Likes: 3
From: League City TX
Most research is based on hearing comments, just like yours.
You just put more faith in the comments that coincide with what you would like them to be.
Racer
Joined: Feb 2009
Posts: 265
Likes: 0
You can see where it should be and where it is. Both exhaust ports dump in the center on #4 and #6 so heat is more concentrated in the center than throughout the rest of the head and full coolant flow is the most critical here. Would bet the head warped causing the blown gasket due to inadequate coolant flow between cylinder 4 & 6 as a direct result of poor quality machining. Did you check the head with a straight edge for warpage?
I think some people can be told not to touch the hot stove, and they get it,
other people have to touch the stove anyway and find out firsthand why it's a bad idea....
I don't pretend to be an expert, but I now know enough that 1) playing with vettes gets expensive and 2) trying to cut corners (especially on something this critical) is a really bad idea. There...I said my 2 cents (or euros as the case may be).
Last edited by kunkle; Apr 4, 2009 at 11:46 PM.
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
just do an internet search, as I did when I saw them a year ago or so... Someone did a direct dyno test on them and they were worse than the stock heads!!
I have 7 words.. "They are junk junk junk junk junk". Was that seven?
.... it always seems to boil down to you get what you pay for. I payed more than that just for porting, polishing, and port-matching on my heads....
I have 7 words.. "They are junk junk junk junk junk". Was that seven?
.... it always seems to boil down to you get what you pay for. I payed more than that just for porting, polishing, and port-matching on my heads....
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
Sure thing, but have you ever used or inspected these cylinder heads? I am not very much worried about where in the world they have been produced, so please keep this on a technical level and skip promoting other brands. They are selling a lot of these ProComp cylinder heads on eBay, so it must be a reason for this.... would'nt you think? Anyone else please....
rgds
Arne
Anyone else please....rgds
Arne
duh!!