stock heads?
Thread Starter
Burning Brakes
Joined: Sep 2005
Posts: 1,141
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From: Kona, Treasure coast Hawaii, Florida
stock heads?
well my brother noticed that i dont have the number on my heads (i think it should say 246) but they are polished where it would say my number. This car was modded from what i beleive (racing clutch). Is their a way i can look to see who makes them? sorry i dont have a pic.
Drifting
Joined: Aug 2004
Posts: 1,837
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From: . Kona, HI. Orem, UT. PSL, FL
Originally Posted by jdec
I think it's on the deck of the head, but i'm not positive on that.
Drifting
Joined: Jun 2005
Posts: 1,824
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From: Middleboro Massachusetts
#243 is located on the passenger side front above where it meets the block.http://cgi.ebay.com/ebaymotors/LS2-L...spagenameZWDVW
Scroll down for a picture in the right row.
Last edited by zo6vetteman2003; Sep 17, 2006 at 11:55 PM.
Drifting
Joined: Jun 2005
Posts: 1,824
Likes: 1
From: Middleboro Massachusetts
One other way to identify a real LS6 #243 head, is that below the exhaust outlets where the spark plugs are, there are a series of triangles along the bottom cast into the head. Without these you actually have a "sand casted" head. The LS6 heads are a SPM "semi permament mold". The SPM heads will result in 6-10 additional horsepower over the sand casted heads.
D shaped exhaust ports are another feature of a ls6 head. Hard to tell if they are installed with the exhaust manifolds on though
D shaped exhaust ports are another feature of a ls6 head. Hard to tell if they are installed with the exhaust manifolds on though
Drifting
Joined: Jun 2005
Posts: 1,824
Likes: 1
From: Middleboro Massachusetts
Originally Posted by chris.shea
Any reason why they would shave and polish where the numbers would be?
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Drifting
Joined: Aug 2004
Posts: 1,837
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From: . Kona, HI. Orem, UT. PSL, FL
Originally Posted by zo6vetteman2003
It could be an aftermarket head is all I can think of. Was this car being passed off as a ZO6?
mitch please log me out
Last edited by Chris.Shea; Sep 18, 2006 at 01:26 PM.
Advanced
Joined: Apr 2005
Posts: 65
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I have a set of AFR 205 heads milled to 58 cc with Comp 921 dual springs and titanium retainers. C/R was around 11.8. They have about 3,000 street miles on them. A small piece of my top ring broke and put reeeeeeally small marks on one cylinder. Mill them another .002 and they will be perfect.
I ended up building a forged 402 with 225 heads.
The cost me 2700.00
Someone make me an offer that is reasonable and I will let them go
I ended up building a forged 402 with 225 heads.
The cost me 2700.00
Someone make me an offer that is reasonable and I will let them go
Drifting
Joined: Jun 2005
Posts: 1,824
Likes: 1
From: Middleboro Massachusetts
Originally Posted by 22655td
I have a set of AFR 205 heads milled to 58 cc with Comp 921 dual springs and titanium retainers. C/R was around 11.8.
Advanced
Joined: Apr 2005
Posts: 65
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I ran them for 4 months and had no detonation or knock. If your tuner is good with Ls1 Edit you can tune the knock right out. Higher C/R is better if you run a big cam. 242/246 618/624 111. You could a slighty thicker head gasket than the .040 cometic I used to get 11.8
100 octane will do nothing for you just burn up your o2 sensors and fry your cats. LG motorsports is shipping 58 CC heads everyday. For a 346 cube motor there fine. If you go up in cubes you have to have more cc due to your C/R will be alot higher. I am running a 402 with -2 cc pistons and a .040 gasket, 225 heads milled to 67cc giving me around 11.9. again I have no knock or detonation. Just tune the timing or adjust the fuel tables to get rid of any issues.
100 octane will do nothing for you just burn up your o2 sensors and fry your cats. LG motorsports is shipping 58 CC heads everyday. For a 346 cube motor there fine. If you go up in cubes you have to have more cc due to your C/R will be alot higher. I am running a 402 with -2 cc pistons and a .040 gasket, 225 heads milled to 67cc giving me around 11.9. again I have no knock or detonation. Just tune the timing or adjust the fuel tables to get rid of any issues.
