1W crank, G40 block, machining?

[Richg40]

Ok, does anyone have a definative answer on exactly how much machining a G40 block would need to accept a 1w crank? I'm struggling to find detailed info on this build.

Rich.

[Richg40]

Any ideas?

[poloeatonm45]

i emialed the guy who you got this from on ebay and he said some dont need it at all but others need around 2-3mm taking off. i would of thought it would be a case of just try it and turn the crank by hand to see if it clears, if it dont grind a bit out and try again 

steven

[Richg40]

yeah, i got the same impression from everything i've read. finding actual real info that can be relied on is tricky.

[hayesey]

I think that's because people with 1Ws have used the 1W block so far haven't they?  Going to be a case of suck it and see I think, put the crank in and see what the score is.

[Richg40]

Block is off being rebored, i'll feedback on this when it's done.

[Richg40]

Well i finally got it back. Having tried the crank and pistons the flat end of the big end cap bolts catches a tiny bit on the block oil gallery. After shaving a gnats chuff off the head of the bolt it runs sweet.

[PeteG40]

i'd have taken a bit off the block not bolt - will it not be unbalanced/

[youngprodigys]

as above - surely the block was the best thing to chop???

[Richg40]

Both bolts on each conrod have been skimmed. Can't cut into oil line too risky.