Pistons

partybarge_pilot

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British parts in a Yami? It'll never work........





They should apply a little of there expertise to the valves........
 

Dezertpilot

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Ok, what is the difference between this and a J/E, etc?
 

Dezertpilot

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I know Cosworth stuff is BA top of the line stuff but how would this be any better than another high quality piston?
 

partybarge_pilot

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Anti-scuff side coating, Electro polished top, I'm not sure what ring package Yami's are running currently, but it's got a very thin single ring package=less friction. Material, Casidiam coated wrist pin, from the wall thickness of it could be a Ti pin..... And all the F1 engineering goodness you could ever want.
 

Sparky

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Oooohhhh. The 250F is needing a piston...

Where can you buy?
 

troyharper

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Oooohhhh. The 250F is needing a piston...

Where can you buy?
cosworthusa.com
Tell Donavan Norris Troy Harper sent ya
 

Chase 2

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Anti-scuff side coating, Electro polished top, I'm not sure what ring package Yami's are running currently, but it's got a very thin single ring package=less friction. Material, Casidiam coated wrist pin, from the wall thickness of it could be a Ti pin..... And all the F1 engineering goodness you could ever want.
Won't a lighter wrist pin change the balance?
 

partybarge_pilot

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Won't a lighter wrist pin change the balance?
Yup. For some reason that doesn't seem to bother most piston makers. The Weisco I got for My KLX300 was 10 grams heavy. Boy was that fun to balance out,tapering the ends of the wrist pin was hard on the carbide boring bar........
 

Sparky

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Yup. For some reason that doesn't seem to bother most piston makers. The Weisco I got for My KLX300 was 10 grams heavy. Boy was that fun to balance out,tapering the ends of the wrist pin was hard on the carbide boring bar........
What is the big deal? We are only spinning those engines to 13Krpm or so... LOL!! And guys wonder why they get vibrations when they install big-bore kits with heavier pistons.
 

Dezertpilot

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So one day when I need a piston look for a Cosworth Piston, gotcha, thanks!!
 
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