C5R heads, where-how much etc
Thread Starter
Melting Slicks
Joined: Oct 2002
Posts: 2,855
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C5R heads, where-how much etc
Do you order c5r heads from GM, from Katech? how expensive are they and is this bare head--I am thinking that to save the value of the the head it would be better to change pistons than try shrouding etc to get these to a streetable CR of say 11.25 CR--there is no doubt they outflow anything available and I'm sure they will outflow anything in the works like the AFR's--they are obviously either hard to get or very expensive or completely impractical or more people would be applying them to their cars---
Le Mans Master
Joined: Jul 2002
Posts: 6,147
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From: Dallas TX
Re: C5R heads, where-how much etc (NEPTUNEBILL)
I know you need a custom intake manifold to accomodate the heads.
Besides the cost of the heads, the extra 2 grand for the manifold is another turnoff.
Besides the cost of the heads, the extra 2 grand for the manifold is another turnoff.
Le Mans Master
Joined: Jul 2002
Posts: 6,147
Likes: 32
From: Dallas TX
Re: C5R heads, where-how much etc (kumar75150)
I think you also need different rockers, special valves, pushrods, and maybe custom fuel rails.
I think a bare set of C5R heads is around 4 grand. Just a guess.
Ported C5R heads can flow close to 400cfm.
[Modified by kumar75150, 4:24 PM 2/13/2004]
I think a bare set of C5R heads is around 4 grand. Just a guess.
Ported C5R heads can flow close to 400cfm.
[Modified by kumar75150, 4:24 PM 2/13/2004]
Thread Starter
Melting Slicks
Joined: Oct 2002
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Re: C5R heads, where-how much etc (kumar75150)
:lol: :lol: :lol: Sorry I asked--I think a 100K+ is enough to put into this car I can see another 20K to get these heads up and running but boy would 400cfm be sweet--than another 5K+ to get an intake and TB that would feed it--I should have gotten an LPE 427TT with boost controller and been done with it--
Le Mans Master
Joined: Jan 2001
Posts: 5,786
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From: Lafayette Colorado
Re: C5R heads, where-how much etc (NEPTUNEBILL)
Last time I checked, the bare C5R head was about $1200ish. The head is layed out in that it requires at least a 4.10" bore cylinder. Beside the point mentioned about the custom intake, the non full race version uses 38cc chambers so a serious dish piston( -24cc ) would need to be used.
Keith
Keith
Team Owner
Joined: Mar 1999
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From: San Jose/Bear Valley CA
CA Events Coordinator
Re: C5R heads, where-how much etc (NEPTUNEBILL)
I should have gotten an LPE 427TT with boost controller and been done with it--
VR :cheers:
Thread Starter
Melting Slicks
Joined: Oct 2002
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Re: C5R heads, where-how much etc (kromberg)
Keith--I've got the 4.1 bore--I assume thats 1200+- each, do you know if the hardware I have on these new heads would work on them, valves, springs, roller rockers etc--I would think a sheetmetal intake would feed them at a reasonable CR if we can find a TB that will draw enough air--I assume it would only be practical to go solid roller with them--
Hell I didn't think about headers too--I wish I had done this to start with I have too much in the current setup already--
Hell I didn't think about headers too--I wish I had done this to start with I have too much in the current setup already--
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Burning Brakes
Joined: Feb 2002
Posts: 1,154
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From: Jasper GA
Re: C5R heads, where-how much etc (Sir Sel)
Bill:
I'd go back to a blower before I got involved with all that C5R mess. A 427 (or your 436) with 9:1 C.R., an appropriate blower cam, and a T-Trim Vortech at 11-12 psi should be good for at least 700 RWHP, and would probably be a cheaper conversion than going C5R. It would require more sophisticated engine management and an upgraded fuel system, but I did all that on my dear, departed Camaro and the results merit the effort.
We're never satisfied are we?
I'd go back to a blower before I got involved with all that C5R mess. A 427 (or your 436) with 9:1 C.R., an appropriate blower cam, and a T-Trim Vortech at 11-12 psi should be good for at least 700 RWHP, and would probably be a cheaper conversion than going C5R. It would require more sophisticated engine management and an upgraded fuel system, but I did all that on my dear, departed Camaro and the results merit the effort.
We're never satisfied are we?
Instructor
Joined: Oct 2002
Posts: 171
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From: Cologne Germany
Re: C5R heads, where-how much etc (NEPTUNEBILL)
Kinsler has nice looking intake manifolds. Too pricey for me though.:cry
http://www.kinsler.com/i_manifolds.htm
Till
[Modified by till, 9:21 AM 2/15/2004]
http://www.kinsler.com/i_manifolds.htm
Till
[Modified by till, 9:21 AM 2/15/2004]
Burning Brakes
Joined: Feb 2002
Posts: 1,154
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From: Jasper GA
Re: C5R heads, where-how much etc (till)
You'd also need a complicated, mechanical throttle linkage assembly, custom fabricated air intake, etc., etc.
Life is too short to go out of one's way to look for aggravation.
Life is too short to go out of one's way to look for aggravation.
Thread Starter
Melting Slicks
Joined: Oct 2002
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Re: C5R heads, where-how much etc (marco383)
I'm with you Mark--screw it I would just like what I have to reach its potential and it will be more than adequate--I would settle for a decent idle right now--drawing 5 inches of vacuum at WOT--I need the FAST 90 setup to work and that will be enough for gods sake, I really just want a good fast powerful and fun street car--
