Difference between heads?

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Oct 24, 2011 | 03:34 PM

futuretech

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Drifting

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From: Homer Glen IL

Difference between heads?

Differences between stock 243 heads and Patriot stage II. Is it worth $1300 for the patriots?

Oct 24, 2011 | 06:23 PM

tlove32

Melting Slicks

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From: Bay Area CA

Patriot heads are CNC ported 243 castings........which will provide 20+ hp increase depending on the combustion chamber size. I think they're worth it

Oct 25, 2011 | 01:10 AM

RonSSNova

Safety Car

Joined: Aug 2011

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From: Portland OR

A good friend here has run bottom 11's with the Patriots. I think they are part number 2027? They make a few variations.

Ron

Quote:

Originally Posted by tlove32

Patriot heads are CNC ported 243 castings........which will provide 20+ hp increase depending on the combustion chamber size. I think they're worth it

Oct 25, 2011 | 10:10 AM

futuretech

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Drifting

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From: Homer Glen IL

Thanks guys. I am looking at the 64cc (stock) chamber that provides a compression ratio of 10.5. So basically it comes down to the difference between ported and non-ported 243 heads, right?

Oct 25, 2011 | 10:54 AM

lucky131969

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Joined: Jan 2007

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From: Dyer, IN

Quote:

Originally Posted by futuretech

Thanks guys. I am looking at the 64cc (stock) chamber that provides a compression ratio of 10.5. So basically it comes down to the difference between ported and non-ported 243 heads, right?

Good questions for Patriot. I called them last year to inquire about a few things..........and found them very helpful.

Oct 25, 2011 | 12:52 PM

tblu92

Le Mans Master

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From: CA.

St. Jude Donor '13-'14-'15

The stock 243 (LS6) heads have a intake runner of 210 cc's--I think a
LS1 head is only 190---The patriot ported LS6 head has an intake runner of 227 cc's

Oct 25, 2011 | 03:48 PM

futuretech

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Drifting

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From: Homer Glen IL

Quote:

Originally Posted by tblu92

The stock 243 (LS6) heads have a intake runner of 210 cc's--I think a
LS1 head is only 190---The patriot ported LS6 head has an intake runner of 227 cc's

very interesting

Oct 26, 2011 | 01:06 AM

Thickraybans

Racer

Joined: Jan 2006

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From: Ft. Wayne In

The stage II heads have 2.02/1.57" valve size, their very good dual springs & titanium retainers. Here is the before and after charts on my Patriots with a 59cc chamber. http://forums.corvetteforum.com/1563124671-post18.html Picked mine up used for $800. Very well worth it to me.

Last edited by Thickraybans; Oct 26, 2011 at 01:12 AM.

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Oct 26, 2011 | 12:57 PM

Redvette_22

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From: jackson nj

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Oct 26, 2011 | 02:16 PM

#10

feeder82

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From: Wisconsin

Quote:

Originally Posted by futuretech

Thanks guys. I am looking at the 64cc (stock) chamber that provides a compression ratio of 10.5. So basically it comes down to the difference between ported and non-ported 243 heads, right?

your static comp. ratio would be 10.74 with a .051 gasket, 11.04 with a .040 gasket