entropy
Moderator
Posts: 8671
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posted April 21, 2005 12:15 AM
piston weight: what variance is OK??
any of you guys put yr pistons on a balance???
what kind of variation is considered OK??
MTC 87mm are about 300gm (w/pins)...
BTW: Falicon rods are about 350gm
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johnnycheese
Pro
Posts: 1008
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posted April 21, 2005 04:14 AM
Karl I try to make them all the same but the local drug dealer is in jail and I have no access to a triple beam.
I would buy one but with the amount of cops that come in the shop I would be scared they would think I am doing something I am not
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Builder and tuner of some of the fastest N.A. and P/A Hayabusas and ZX12 /14 in Texas
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MadMike
Moderator
FEAR THE BLACK FLAG!!!!!!!!
Posts: 6579
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posted April 21, 2005 04:19 AM
what is a stock rod???
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entropy
Moderator
Posts: 8671
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posted April 21, 2005 04:38 AM
 Edited By: entropy on 21 Apr 2005 05:39
400gm = stock rods
JC: In Austin, there is only one thing that triple beams are used for... gimme a call on my cell 832 603 3591, i'm going to the airport but flight is not till 10:30am, back tonight; tomorrow???
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aliveagain
Needs a life
Posts: 5033
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posted April 21, 2005 06:56 AM
I was thinking of using my postal scale I use for weighing the nitrous bottles.Fifty lb. limit but it also measures in grams.
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I wondered why the baseball kept getting bigger. Then it hit me.
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zrxdean
Needs a job
Posts: 2225
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posted April 21, 2005 07:59 AM
My pistons and rods are balanced to within a half gram of each other. I use a digital postal scale - accurrate to a tenth of a gram.
Hey Johnny: what rod clearance do you set on ZXs?
Dean
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kcadby
Pro
Posts: 1733
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posted April 21, 2005 10:02 AM
Edited By: kcadby on 21 Apr 2005 11:04
MY TripleBeam is used for engine parts only... 
Seriously...
John's ZX1260...Pistons, Rings, Pins, Clips, Carrillos all together are @ 2-tenths of a gram heaviest to lightest 
Karl...check the wrist pins by themselves, I have seen a big difference in weight sometimes...
You can match a heavier pin with a lighter piston sometimes to get them closer before grinding on the pistons 
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entropy
Moderator
Posts: 8671
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posted April 21, 2005 11:17 PM
quote:
MY TripleBeam is used for engine parts only...
me too (these days)
KC: good point on the pins vs bare pistons; i'll try it.
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