60mm crank

[no-hair]

i`m about to fit my first 60mm crank is ther anything that i may need extra , thats differant to the standard 58mm ,

[bigmuff]

A 1mm packer plate/ 1mm recessed head/ Lots of patience and a dremell.
You should be lucky if you need only 2 of the above. I have only fitted 60mm MEC cranks to 2 small blocks and both have needed a bit of dremell surgery (about 0.5mm clearance) in the crankcase. Have Fun. Be Lucky.

[no-hair]

hi bigmuff , so where is the packing plate for , does anyone have any pictures of the packing plate which is required , cheers :wtf:

[turbovan]

Best to speak to Harry barlow .He put a 61mm crank in mine no problem.

[mickdale]

Best to speak to Harry barlow .He put a 61mm crank in mine no problem.

he gets the crankcase machined so a recess sits where the big end rotates. This stops the conrod fouling the case.
very cheap too

[carlos fandango]

hi bigmuff , so where is the packing plate for , does anyone have any pictures of the packing plate which is required , cheers :wtf:

first of all why do you want a 60mm stroke?

if one is fitted the piston crown at TDC will be 1mm higher and at BDC 1mm lower. you need to check that at BDC it has enough clearance and doesnt foul / hit anything !

So that leaves the 1mm at TDC, to take this up, the barrel can be lifted 1mm higher with a 1mm packer in the base gasket area (the packer is base gasket shaped) this will maintain the correct/existing

squish (It would still need checking though).

Or you could fit a 1mm thicker head gasket to what you already have. this would also maintain the correct/ existing squish.

Or a combination of the two 0.5mm at top and bottom ?

BUT the deciding factor re packers should be the port timings, as making these alteration alters port timings and in turn the characteristics of the engine / ride. Check out Edens "port time calculator"

on the board index page at the bottom

So, ill say it again why do you want a 60mm stroke crank ? and how do you want to improve the engine / ride?

[corrado]

....... 'Cause it's bigger. :bigsm:

[Chutney Brownlove]

Best to speak to Harry barlow .He put a 61mm crank in mine no problem.

he gets the crankcase machined so a recess sits where the big end rotates. This stops the conrod fouling the case.
very cheap too

Machined? I use a lap wheel. cheaper still.

[DMC]

Best to speak to Harry barlow .He put a 61mm crank in mine no problem.

he gets the crankcase machined so a recess sits where the big end rotates. This stops the conrod fouling the case.
very cheap too

Machined? I use a lap dancer. cheaper still.