Will these heads work without fly cutting
Thread Starter
Burning Brakes
Joined: Feb 2006
Posts: 844
Likes: 46
From: Southaven MS
Will these heads work without fly cutting
I have a chance to buy some gtp stage two heads that are milled .005. I was wondering if they will work with a tr224/224 or tr230/224. Any help would be greatly appreciated. If they wont work this will kill the deal.
Racer
Joined: Mar 2005
Posts: 475
Likes: 0
From: Euless TX
Why is the casting number on the heads. That is very minimal milling and you will more than likely be fine. You should always check the ptv clearance. The type of gaskets you use can make a difference as well.
Melting Slicks
Joined: Jul 2005
Posts: 2,572
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From: Rehoboth MA . . . NRA Life Member
St. Jude Donor '06-'07
.005 is almost nothing. I think a human hair is about .003.
A quick check would be to lay the new head on the cylinder deck, using the old compressed gasket, and turn the crank very slowly BY HAND to feel any contact between the valve and the piston.
Most fly-cut pistons have much more valve to piston clearance that .005 so you should be fine.
Bob
A quick check would be to lay the new head on the cylinder deck, using the old compressed gasket, and turn the crank very slowly BY HAND to feel any contact between the valve and the piston.
Most fly-cut pistons have much more valve to piston clearance that .005 so you should be fine.
Bob
Pro
Joined: Feb 2006
Posts: 616
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From: Vancleave Ms.
Originally Posted by BobbyG
.005 is almost nothing. I think a human hair is about .003.
A quick check would be to lay the new head on the cylinder deck, using the old compressed gasket, and turn the crank very slowly BY HAND to feel any contact between the valve and the piston.
Most fly-cut pistons have much more valve to piston clearance that .005 so you should be fine.
Bob
A quick check would be to lay the new head on the cylinder deck, using the old compressed gasket, and turn the crank very slowly BY HAND to feel any contact between the valve and the piston.
Most fly-cut pistons have much more valve to piston clearance that .005 so you should be fine.
Bob
One more thing I forgot. you need a set of lifters (just for the cylinder you plan on checking P/V clearance) converted into a solid lifter by flipping over the plunger so the lifter won't collapse during the procedure. It is impossible to pump up the lifter and keep it pumped up when turning the engine over by hand. Just think of it as a special tool for any future builds. Most machine shops can convert the lifters for you.
James
Last edited by mean lx; May 22, 2006 at 09:14 AM.
Pro
Joined: Feb 2006
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From: Vancleave Ms.
Originally Posted by redcycle13
just to be clear. .005 is 50 thousands of an inch correct.
Thread Starter
Burning Brakes
Joined: Feb 2006
Posts: 844
Likes: 46
From: Southaven MS
Would you let these heads go because the pistons need to be fly cut? I am running nitrous on this motor and I hear the sharp edges can cause detonation. I can pick these heads up for $900, but I dont want to raise the cost of them by having a bunch of extra work that needs to be done.
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Pro
Joined: Feb 2006
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From: Vancleave Ms.
Originally Posted by redcycle13
Would you let these heads go because the pistons need to be fly cut? I am running nitrous on this motor and I hear the sharp edges can cause detonation. I can pick these heads up for $900, but I dont want to raise the cost of them by having a bunch of extra work that needs to be done.