i bought a set of speed pro forged pins
PN L2256F
they are a stock type piston with "pressed fit" pin

ok, the wrist pins are a slip in the piston, can i buy a set of eagle esp rods with a bushed wrist pin and just buy a new set of floating pins???
or do they bush the piston as well?


please tell me i didn't screw myself on the pistons.

 

If the pistons don't have a way of holding the pins in, you can't float them. Normally the pistons will be machined specifically for wrist pin locks and would cost more.

 

No, the piston does not get bushed. But you need to check if the piston has a pin lock groove for the spiral lock that holds the pin in. If it was designed for a pressed fit application it may not work with a floating pin.

 

well i'm a machinist, i work on cnc's and stuff, i wonder if its something i can do rather easy...

 

It may be possible to machine a groove in the piston and get either shorter pins or machine the pins you have to work. Im sure it would be very labor intensive to do and may be worth it to buy the correct parts and sell the wrong ones.

 

naw, i like doing my own custom work....

made a 52mm monoblade from the stock housing
made a set of 1.5" wheel spacers
made my own rear brake brackets for the 8.5" rear
ect.


anyway, yeah, i can chop the pins down on the edm, nice clean precise cut.

as for the grooves, that will be tricky, first i need the clips to see how wide and deep the grooves need to be...i'll probably have to make a cutter for the job, but it shouldn't be too difficult, just take some time..

 

I just went through this same thing. I ordered h-beam rods, and they don't make a press fit h-beam rod.

I already had forged pistons press fit, so I ordered a set of I beam rods.

Got the shop to press them on, took em home, put the motor together, and 3 seconds after startup, it locked up.

The wrist pins had seized onto the pistons. The shop told me I should have soaked the piston/rod in lubricant before installing the piston/rods. I'd never heard of such a thing.

I just bought a set of speed pro forged floating pistons for $425 for the h-beam rods that I have, and there's no way that this will be screwed up this time.

Go with the floating, it will cost a little more, but you'll know that they are right since you can put them together yourself.

This little ordeal has costed me 1 scat I beam rod (damaged), a set of forged 2256F speed pro pistons, new H beam rods for replacements, and a set of forged speed pro pistons floating for replacements.

D Moss