When Fly-cutting pistons... 
When Fly-cutting pistons...
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Originally Posted by Demon SS
top dead center
There is not enough room under the cylinder head with the piston at TDC for the fly-cutting tool... I got the one from Isky, 2-1/4 (2.06).
***Edit***
I may be using a different tool from what most use. I got the tool from ThunderRacing
http://www.thunderracing.com/catalog...&vid=7&pcid=17
I am going to the garage to take some pics...
Last edited by SideStep; May 10, 2005 at 05:39 PM.
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as far as i know you need a scrap set of heads with the valve seats REMOVED and the cutting tool takes the place of the seats. thats probably why you don't think you have the room. heres a nice wright up i found.
http://www.forcefedhighperformance.com/tech_Isky.htm
If anyone else is interested, i have a second set of 98 heads i'm not going to use, and eventualy was going to do this with, i can cut you off a cylinder and you can use that.
also i noticed you said this...
2-1/4 is 2.25, not 2.06...
http://www.forcefedhighperformance.com/tech_Isky.htm
If anyone else is interested, i have a second set of 98 heads i'm not going to use, and eventualy was going to do this with, i can cut you off a cylinder and you can use that.
also i noticed you said this...
There is not enough room under the cylinder head with the piston at TDC for the fly-cutting tool... I got the one from Isky, 2-1/4 (2.06).
Last edited by WickedS6; May 10, 2005 at 06:49 PM.
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Originally Posted by WickedS6
as far as i know you need a scrap set of heads with the valve seats REMOVED and the cutting tool takes the place of the seats. thats probably why you don't think you have the room. heres a nice wright up i found.
http://www.forcefedhighperformance.com/tech_Isky.htm
If anyone else is interested, i have a second set of 98 heads i'm not going to use, and eventualy was going to do this with, i can cut you off a cylinder and you can use that.
http://www.forcefedhighperformance.com/tech_Isky.htm
If anyone else is interested, i have a second set of 98 heads i'm not going to use, and eventualy was going to do this with, i can cut you off a cylinder and you can use that.
Yes you are right!!!
I just got off the phone with Tony (AFR) and he explained the whole ordeal to me... I have a set of LS1 241 heads and I am going to get the valve seats mahined out so the tool will sit up in the head.
Thanks, Tony and everyone else that posted
Last edited by SideStep; May 10, 2005 at 06:56 PM.
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Originally Posted by WickedS6
...If anyone else is interested, i have a second set of 98 heads i'm not going to use, and eventualy was going to do this with, i can cut you off a cylinder and you can use that...
You need to set the piston at TDC with a dial indicator. Also the piston rocks back and forth on the rod pin. FWIW the guy that did my notching used 1/4 of a head. That way he didn't have to keep moving the cutters. Surprisingly he never thought of using tape to keep the filings out of the cylinders, or using a feeler gauge to set the depth of the collar.
I don't know if this is allowed here, but I have an 853 head cut for the tools and a set of Isky cutters and shafts I can rent and maybe we can work something out. If you are interested give me a PM. I just did this on my 99 C5.
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Originally Posted by ArKay99
I don't know if this is allowed here, but I have an 853 head cut for the tools and a set of Isky cutters and shafts I can rent and maybe we can work something out. If you are interested give me a PM. I just did this on my 99 C5.
I am going to try to cut mine in the next week or so, any help would be appreciated
Last edited by SideStep; May 11, 2005 at 07:45 AM.
The piston needs to be top dead center and you just need to remove the valve seats from an old head. I had to double up the gaskets to get enought clearance for the tool to fit properly. Make sure you use a dial caliper to measure the length of the cut to keep them the same depth. You will see what I mean once you cut a couple.
Force Fed HP has a write on this site that shows you exactly how to do it. Use the dial indicator to get TDC, but use a feeler gauge between the cutter collar and where the valve seals sits to get the correct depth. This is not exact science so there will probably be .010-.015 differences in notch depth.
