I have some peugeot sport Mahle forged pistons that have fully floating pins. (They are designed for a 1294cc 205 Rallye)
I am not using these right now. However I have been offered a set of modfied connecting rods that have been modfied to fit forged pistons. The measurement of the small ends are claimed to be 20mm.
I measured the pins on my pistons (with a digital slide) and I measure 19.98, 19.97.
I have little knowledge of the tolerance in the fitting of floating pistons. Does this sound like a good fit for my pistons. Or am I better off getting someone to machine my standard conrods to fit (which are normally a smaller interference fit)?
Thanks
Christopher
Floating piston pins - Fitting of conrods
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Hello Chris
those pins would be way too loose, rattle and knock the rods to pieces, you need about 0.008mm clearance for a good sliding fit rod-pin. rod bush-pin fits are a job for the expert only (ie: rod manufacturer).
Better to get some race rods made. I use only Calif based Cunningham as it happens but UK Arrows do race rods too and are a nice firm to deal with.
FWIW you are on the right lines, I'd never run press fit pins for choice.
GC
those pins would be way too loose, rattle and knock the rods to pieces, you need about 0.008mm clearance for a good sliding fit rod-pin. rod bush-pin fits are a job for the expert only (ie: rod manufacturer).
Better to get some race rods made. I use only Calif based Cunningham as it happens but UK Arrows do race rods too and are a nice firm to deal with.
FWIW you are on the right lines, I'd never run press fit pins for choice.
GC
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