Shaved Heads
Thread Starter
Melting Slicks
Joined: Sep 2006
Posts: 3,094
Likes: 7
From: Stillwater Oklahoma
Shaved Heads
I am doing a port/polish job on a set of heads for my c5, and i am thinking of shaving the heads a little bit to get back some of the cc that am loosing from cleaning up the chamber. How will the fit be once i am done with this. What will have to be done to the intake to make it work. I am only talking about 20 thousads or so.
Thanks
Jason
Thanks
Jason
Instructor
Joined: Feb 2007
Posts: 179
Likes: 0
From: Savage, Minnesota
I just installed stock heads that were P&p and milled .060 along with g5x3 and all the other go along goodies. The only fitment issue I ran into was the intake manifold was a little tight, but i applied just a little pressure in a few spots and it popped in. bolted it down to spec and have not had any issues or problems with it so far.
Race Director
Joined: Sep 1999
Posts: 12,434
Likes: 916
From: CONCORD NC
You will want to shave down the metal plugs on the bottom corners of the intake manifold. They will bottom out in the heads, according to my old friends at GM racing. The plastic ones are OK, but the metal ones should be trimmed off.
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Instructor
Joined: Feb 2007
Posts: 179
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From: Savage, Minnesota
No, engine and pistons stay in the car. Its a ls1 head and a actual valve with a cutting edge welded on to it. The head gets mounted on with no gasket and the valve/cutting tool in place. Then a shop vac can get hooked up to the exhaust port to remove metal shavings. Using a cordless drill you drill into the piston, Very Very Very slowly. I took about .005 to .010 off per cut, then check depth with a dial caliper. LG told me you can go .080 into piston I only went .070 since I only took .060 off the head. I would do it again, it was scary at first but as long as your careful you cant screw up.
Thread Starter
Melting Slicks
Joined: Sep 2006
Posts: 3,094
Likes: 7
From: Stillwater Oklahoma
JagTech,
For as little as i want to take off, will i need to cut int my pistons? Of course i will check my clearances when the time comes, but do you have any idea. That is nice little list of mods you have there, similar to what I want to do.
Jason
For as little as i want to take off, will i need to cut int my pistons? Of course i will check my clearances when the time comes, but do you have any idea. That is nice little list of mods you have there, similar to what I want to do.
Jason
Last edited by Itallian33; May 11, 2007 at 08:38 AM.
Instructor
Joined: Apr 2006
Posts: 161
Likes: 1
From: Cypress TX
Good info...seems like you can get the depth exactly the same every time by using a shaft collar as a stop...mcmaster carr has em cheap.
When the time comes, I was just gonna post on LS1tech or this forum to see if someone has the Isky cutters for stock valves.
When the time comes, I was just gonna post on LS1tech or this forum to see if someone has the Isky cutters for stock valves.
Thread Starter
Melting Slicks
Joined: Sep 2006
Posts: 3,094
Likes: 7
From: Stillwater Oklahoma
This brings up an idea. when cleaning up the Chamber, it is a good idea to clean the area around the valve itself. Does anyone make a cutter that is basically a valve with a radius around the outside to make the propper exit radius? If not it would be easy to make if you could lap carbide on the end of the valve.
jason
jason
Instructor
Joined: Feb 2007
Posts: 179
Likes: 0
From: Savage, Minnesota
It all depends on the cam (how big) you have, so I dont know for sure. Call the cam company you are going to use, they should have a good idea if you will need to or not.
