un cut 6 bolt crank

plow420 · 03-25-2015

Looking for a virgin crank 6 bolt.

blesi660r · 03-25-2015

I've got one pm me

s1ngletracker · 04-10-2015

Why does everyone want virgin cranks? what is wrong with running oversized bearings? me no get.

plow420 · 04-10-2015

DSM cranks have a hardened layer and that's why the FSM says they are not serviceable. Its a big debate, many shops also don't recommend it.

Alpha D · 04-10-2015

^ what he said, the re treating of the crank isnt cheap either.

dsmDolney · 04-10-2015

Ive got one im sure might need a polish but ill check when i get home from work

s1ngletracker · 04-10-2015

Quote:

Originally Posted by plow420

DSM cranks have a hardened layer and that's why the FSM says they are not serviceable. Its a big debate, many shops also don't recommend it.

Interesting, I was not aware of that. Thank you!

**goodhart** · 04-10-2015

It's the nitride coating. Cheaper to find a fresh on than have it re-nitrided.

s1ngletracker · 04-10-2015

gotcha! Makes sense that they are case hardened, that would do a lot for wear resistance.

plow420 · 04-10-2015

I called crankshaft supply today and to service my crank, it will cost $366 plus me shipping and shipping back.

That includes filling the thrust bearing on crank, cutting and polishing the mains, also the nitrate coating. The nitrate coating is $168 alone.

The only reason why i might send them the crank is that it was balanced, I don't know if it will still be balanced after they work on it.

And i am still looking for a good used 6-bolt crankshaft.

DSMINMN · 04-10-2015

$366 isn't bad when comparing to the alternative. Eagle junk for $500ish or Manley for 6. Crankshaft supply is the beesneez around here. They don't carry any 4g cranks down there? Would almost think they would.

Good luck on the decision.

plow420 · 04-10-2015

Crankshaft Supply don't have any stock of 6 bolt cranks. I wish i knew of them sooner. I've trashed 3 cranks because they needed to be cut.

I also have a set of acl tri metals sitting in my garage, I'm thinking about going to aluminum. I haven't had the best luck with the tri metals.

Anyone with experience with aluminum bearings around 500 whp.

punxnotdead185 · 04-10-2015

You can cut 7 bolt cranks .010 and be fine, they are induction hardened and the hardening layer is .025-.030 deep, a 6 bolt crank is nitrided and that only goes .010-.015 deep so a basic .010 cut could remove the hardening off the journal.