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C5R head history....racer only?

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Old 03-27-2009, 07:59 AM   #1
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Default C5R head history....racer only?

Was the C5R head racer only in '02? Anybody remember? Seems like I saw them for sale by Katech (used I know) and probably others.

What was special about the C5R head? Vein port which supposedly twists the intake charge? Sounds like BS to me. The intake ports look normal. Anybody know?
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Old 03-29-2009, 02:34 PM   #2
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I seem to remember buying a set of used Katech heads from El Es One (?) in '02. And it seems like SCPC or some other GM pefermance dealer listed them on their site.
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Old 04-09-2009, 06:01 PM   #3
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Here's an easy one. Were the first C5R engines 346 CI?

Bonus Points: who pioneered the C5R engine? Katech?

What is the biggest diffence in a LS1 piston and a C5R assuming same size engine?
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Old 04-11-2009, 07:40 AM   #4
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Maybe I should move this to Gen III External, eh??
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Old 04-14-2009, 06:22 PM   #5
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Default c5r

the c5r head is a 11degree head while a stock ls1 is 15 degree.thats what et performance told me.i bought a set of them before i knew this and my valves hit the pistons
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Old 04-14-2009, 10:53 PM   #6
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Quote:
Originally Posted by grb View Post
Here's an easy one. Were the first C5R engines 346 CI?

Bonus Points: who pioneered the C5R engine? Katech?

What is the biggest diffence in a LS1 piston and a C5R assuming same size engine?
the c5r is a 7.0 liter (427ci) ls1
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Old 04-15-2009, 08:45 AM   #7
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Yes, but were early C5Rs 346? I don't think so because there has only been one C5R block and it was used to build 427s. Did the factory want a stouter 346? I don't think so.
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Old 04-21-2009, 07:19 PM   #8
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There were indeed white-body C5R's in 99 if I recall. 346 cube engines.
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Old 04-23-2009, 02:36 PM   #9
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Early ones were 6.0L's At least the C5R race cars were
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Old 05-22-2009, 08:37 AM   #10
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When were first 427 CI C5R built? Who built them? Did the early 427 ZL-1s get some of the first C5R 427s????
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Old 05-22-2009, 08:37 AM
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