Help Identifying Heads!
Thread Starter
Race Director
Joined: Apr 2005
Posts: 11,556
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From: SoCal Twin Turbo, Any Questions?
St. Jude Donor '06-'07
Help Identifying Heads!
I purchased this motor in a wreck I purchased for a GTM project.
It had lots of mods, Coilovers, Headers, Shifter ETC.
It also had an oil cooler, and these heads on it.
It says DRM 030 on it. I contacted DRM and they said that is how much they shaved off the deck to increase the compression.
I cant tell if they were stock heads and they were just Modded this way?
Is that something you have done by its self, or usually with porting or Cam or what else? Car also had an LS6 intake (originally came with an LS1 as it was a 2000) and a BBK TB.
Any idea what this setup would make? Assume headers and a good tune, Approximate?
I know a great deal about these cars, but I went the FI route when modding mine, so Heads and Cam stuff is a bit beyond me.
Thanks
It had lots of mods, Coilovers, Headers, Shifter ETC.
It also had an oil cooler, and these heads on it.
It says DRM 030 on it. I contacted DRM and they said that is how much they shaved off the deck to increase the compression.
I cant tell if they were stock heads and they were just Modded this way?
Is that something you have done by its self, or usually with porting or Cam or what else? Car also had an LS6 intake (originally came with an LS1 as it was a 2000) and a BBK TB.
Any idea what this setup would make? Assume headers and a good tune, Approximate?
I know a great deal about these cars, but I went the FI route when modding mine, so Heads and Cam stuff is a bit beyond me.
Thanks
Last edited by NAVY08; Mar 18, 2009 at 10:19 AM.
AMP Racing
Joined: Aug 2006
Posts: 10,753
Likes: 588
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
How about a pic of the heads?
they should have a casting number on the aft part near where the valve cover meets the head. 241, 243, 799, etc.
If they were a brand (AFR, TFS,)it would likely say it on the front face of the head.
they should have a casting number on the aft part near where the valve cover meets the head. 241, 243, 799, etc.
If they were a brand (AFR, TFS,)it would likely say it on the front face of the head.
Thread Starter
Race Director
Joined: Apr 2005
Posts: 11,556
Likes: 52
From: SoCal Twin Turbo, Any Questions?
St. Jude Donor '06-'07
AMP Racing
Joined: Aug 2006
Posts: 10,753
Likes: 588
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
Early style LS1 heads. good for boat ancors. 
People have been known to make big power out of stock 243 casting heads found on the C5 Z06.
You should be able to find a pair for around $400-$500 used.
People have been known to make big power out of stock 243 casting heads found on the C5 Z06.
You should be able to find a pair for around $400-$500 used.
Team Owner
Joined: May 2003
Posts: 23,480
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From: East Meadow NY
St. Jude Donor '12
853's are the early LS1 castings. They are the "worst" of the LSx castings. You would probably have to pull the heads and valve covers to see if anything else was done. I don't know if someone would bother to send out heads to be shaved for higher compression and do nothing else in the process.
Casting 243 are the LS6 heads.
Casting 243 are the LS6 heads.
Thread Starter
Race Director
Joined: Apr 2005
Posts: 11,556
Likes: 52
From: SoCal Twin Turbo, Any Questions?
St. Jude Donor '06-'07
Good to go, Any idea how heavy each of these things are? I'm about to pull the motor and I'm trying to decide weather to pull the heads off it first or not. Motor is probably going to be completely rebuilt, or sold.
I'm thinking LS3 with AFR heads and a big cam.
I'm thinking LS3 with AFR heads and a big cam.
Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
about 22lbs per head.
AMP Racing
Joined: Aug 2006
Posts: 10,753
Likes: 588
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
I'm thinking LS3 with AFR heads and a big cam.
Good luck keeping it on the road.
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Former Vendor
Joined: Feb 2004
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From: Burlington NC
The heads came from our shop. 95 percent of our heads have been ported on. If you clean up the ports with a good solvent, oven cleaner, carb cleaner you will be able to tell if they have had the CNC treatment. Our heads flow good numbers with good port size for your application.
Get scrubbing. Report back
Randy
Get scrubbing. Report back
Randy
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From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
Thread Starter
Race Director
Joined: Apr 2005
Posts: 11,556
Likes: 52
From: SoCal Twin Turbo, Any Questions?
St. Jude Donor '06-'07
The heads came from our shop. 95 percent of our heads have been ported on. If you clean up the ports with a good solvent, oven cleaner, carb cleaner you will be able to tell if they have had the CNC treatment. Our heads flow good numbers with good port size for your application.
Get scrubbing. Report back
Randy
Get scrubbing. Report back
Randy
