Rod bushings and Wrist pin size

[Wotland]

Hello,

I found an very nice set of SBC forged rods to suit my application but of course the wrist pin size is chevy 0.927'' and full floating type.

I have an set of new Omega forged pistons with standard Rover 0.875'' pressed wrist pin.



Rather than modify wrist pin size in piston, I ask to me if someone has already tried to fit new rod bushings and rearmed them to Rover wrist pin size.
And also modify pistons to have provision for the circlip required for full floating wrist pin.

Cheers.
Dimitri

[katanaman]

Bushing the rods shouldn't be a problem, the piston could be though depending on how much material is available. You will probably have to cut the pin down to make enough room. Alternatively you could use PTFE buttons instead of a clip. Would it not be possible to make the bushing so that the pin in a press fit and save all the hassle?

[Wotland]

Hello,
Sorry for my ignorance but what do you mean by PTFE Buttom ?
I contacted Crower and they only supply aluminium bronze bushings for full floating pin.
I don't which type of material to use to machine rod bushings suitable for press pin.

[katanaman]

you press the buttons in instead of using circlips. In turn they are held in place by the bore walls and as they are made of PTFE there is virtually no friction. Very easy to use and virtually failure proof. The are very common on performance motorcycle engines. Not so common on car engines but then a lot of them are press fit so have no use for them.

[kiwicar]

I believe very popular at the top eng of drag racing as they save alot of time in stripping and rebuilding an engine if you burn a hole in the top of a piston.
looks like a very good solution to me.
Mike

[katanaman]

I should add you press them in with your fingers and not a press which is why its a time saver as Kiwicar says.

[350matt]

If you're making bushes which are to hold the pin tightly then go for the same material as the rod. As the pin won't be moving with respect to the rod

Matt