Who sells the ISKY flycutting tool?
06-27-2004, 02:08 PM
#2
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Originally Posted by McRat
Price?
Thanks!
Thanks!
http://www.thunderracing.com/catalog...&vid=3&pcid=17
91-PNT-158 Isky Piston Notching Tool, 1-5/8" Diameter $124.99
91-PNT-178 Isky Piston Notching Tool, 1-7/8" Diameter $124.99
91-PNT-200 Isky Piston Notching Tool, 2.00" Diameter $124.99
91-PNT-214 Isky Piston Notching Tool, 2-1/4" Diameter $124.99
91-PNT-216 Isky Piston Notching Tool, 2-1/16" Diameter $124.99
91-PNT-134 Isky Piston Notching Tool, 1-3/4" Diameter $124.99
91-PNT-218 Isky Piston Notching Tool, 2-1/8" Diameter $124.99
91-PNT-238 Isky Piston Notching Tool, 2-3/8" Diameter $124.99
91-NP-1132 Isky Piston Notching Pilot, 11/32" Valve Guide $39.99
91-NP-516 Isky Piston Notching Pilot, 5/16" or 8mm Valve Guide $39.99
91-NP-38 Isky Piston Notching Pilot, 3/8" Valve Guide $39.99
06-27-2004, 02:11 PM
#3
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I know a couple of vendors sell the tool----->
we rent the setup, if you are interested in that route call Brad at 502-648-1093 or shoot him a PM to user name ForceFed HP
we rent the setup, if you are interested in that route call Brad at 502-648-1093 or shoot him a PM to user name ForceFed HP
06-27-2004, 02:11 PM
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06-27-2004, 06:17 PM
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When using this tool how much P/V clearence will this free up?
Also does this weaken the pistons at all?
I have seen where it is said that a 2cc valve relivef is a huge amount and therefore could mill the death out of the heads w/o P/V clearence.
Is flycutting this about the same?
Also does this weaken the pistons at all?
I have seen where it is said that a 2cc valve relivef is a huge amount and therefore could mill the death out of the heads w/o P/V clearence.
Is flycutting this about the same?
Last edited by JZ'sTA; 06-27-2004 at 06:57 PM.
06-27-2004, 06:54 PM
#7
Originally Posted by McRat
2cc's is a shitload. If you are taking more than 0.060" out, you need to rethink things, IMO.
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06-27-2004, 07:10 PM
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I'm just basing the 0.060" on what I've gotten away with dish releaving cast pistons from years ago. I have zero experience with LS1's.
Since you cannot know what the crown thickness is, flycutting pistons without mic'g them is kinda ghetto. Cast pistons crack easier than forged do, so you want to avoid cutting a piston deeper than you have to.
If you are running a cam so big as to need 1/2 the crown cut down, you probably needed stronger pistons anyways to start with.
But pushing the limits is why you are cutting them to begin with, so BONZAI!!!!
Since you cannot know what the crown thickness is, flycutting pistons without mic'g them is kinda ghetto. Cast pistons crack easier than forged do, so you want to avoid cutting a piston deeper than you have to.
If you are running a cam so big as to need 1/2 the crown cut down, you probably needed stronger pistons anyways to start with.
But pushing the limits is why you are cutting them to begin with, so BONZAI!!!!
06-27-2004, 10:32 PM
#9
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The crown thickness is ~.250", but think about where you are cutting valve reliefs... You don't cut directly in the center of the piston where its at its thinnest, your cutting right above a very re-enforced area of the piston where the piston pin support structure is and that is very thick compared to the crown. Also another thing to consider is the deepest point of the cut valve relief is only a few mm wide, the rest of the cut valve relief is thicker than this one point.
If I get some time this week (prob not) I'll cut a used piston in half and get a more accurate measurement, I think the last one I cut was .330" thick where the valve relief location was.
If I get some time this week (prob not) I'll cut a used piston in half and get a more accurate measurement, I think the last one I cut was .330" thick where the valve relief location was.
