machine JE pistons for stock rods?

[liv4gnz]

my engine builder said it might be another day because he has to machine the pistons because the stock rods will not fit the JE pistons.

any one run into this problem before?

 

[dr_frankenstein]

are the pistons full floaters?

then the rods probably need to be bushed.

A.j.

 

[liv4gnz]

bushed?

i have a pic here
http://i41.tinypic.com/6fql9f.jpg

 

[dr_frankenstein]

bushed?

i have a pic here
http://i41.tinypic.com/6fql9f.jpg

yea, the pistons are for a floating pin. the stock rods are press fit pins.

he will hone, then press a bronze bushing into the rod, then rehone to size of pin. that way the pin will slide thru the rod and will be retained by spirolocks on the piston.

A.j.

 

[87action]

J e pistons

I have a set of je pistons on huge Cunningham rods for my stage motor. Why aren't mine floating? Also I think the rods are stock length making this motor not a stroker, just a 4.1 252cubic inch

 

[Slow91z]

I have a set of je pistons on huge Cunningham rods for my stage motor. Why aren't mine floating? Also I think the rods are stock length making this motor not a stroker, just a 4.1 252cubic inch

Uh the crank with the longer stroke is why it would be referred to as a stroker...Rod length has nothing to do with it.

 

[Nick Micale]

my engine builder said it might be another day because he has to machine the pistons because the stock rods will not fit the JE pistons. any one run into this problem before?

Sounds like the JE pistons are built for a .927" pin, like most using a floating pin/rod.

The stock rod [and piston] uses a .940" pin. He probably does not want to bore out the small end of the stock rod for a bushing as it leaves the rod very weak in that area. This is a cast rod. Boring the piston weaken it in that area.

Best option is to use a forged rod made with a .927" bore, and already bushed. Since it is a smaller diameter pin, it is usually made with stronger material than stock, and JE has various pins depending on HP level and $$$.:smile: