Knife edging a crank

Post Thu Dec 21, 2006 10:16 pm

Anyone had this done? I know the cranks are the bollocks allready but just weighing up the possible benefits for my M52 2.8.

Post Fri Dec 22, 2006 4:02 pm

dead money mate, yes lower reciprocating mass, and arguably more streamlined, but it doesn't cut through the oil in the sump so offers no real benifit when compared to the cost of having it done, unless you can DIY it yourself or have a mate who's a manual machinist

Post Fri Dec 22, 2006 5:41 pm

Stuff it then

Post Sat Dec 23, 2006 4:32 pm

When ever i have heard the spec on a top engine, the majority of them have knife edge cranks. What sort of beans you talking Ant to have that done? (approx)

Post Sat Dec 23, 2006 5:50 pm

I would guestimate at around Ã‚£200

Post Sat Dec 23, 2006 10:33 pm

Post Sat Dec 23, 2006 10:42 pm

Is that your crank Andy?

Post Sat Dec 23, 2006 10:45 pm

No, i just put it up incase some one didn't know what this thread was on about

Post Sat Dec 23, 2006 11:20 pm

Well it certainly looks pretty

Post Sat Dec 23, 2006 11:26 pm

my dad got his crank nife edged but this was because he was aiming for big power

it's not worth it unless your going for big revs

Post Sat Dec 23, 2006 11:30 pm

How much Max?

Post Sat Dec 23, 2006 11:30 pm

don't know try to get in touch with bexleys im sure they will tell you how much it cost unless it came from BMW like that

Post Sat Dec 23, 2006 11:34 pm

Bexleys?

What do you think I am? Made of money!

Anyone would think I was doing a 'proper' conversion

Post Sat Dec 23, 2006 11:37 pm

DanThe wrote:Bexleys?

What do you think I am? Made of money!

Anyone would think I was doing a 'proper' conversion

bexleys aren't up to 'proper' standards tho

i'm sure it wouldn't cost much but it's only really worth it if yout going for high revs.

Post Sat Dec 23, 2006 11:39 pm

Sorry, I must have been thinking of Birds