Crankshaft work

abhattan · 10-21-2006, 02:07 AM

Hi everyone, this is my first forum, so bear with me. I am about to rebuild a 7M-GTE and would like to know what Knife edging and Micropolishing is when it comes to cranks. And about how much would something like this cost?

tone loc · 10-21-2006, 05:47 AM

sorry but what is that?

WiseAssJester · 10-22-2006, 01:46 AM

I wouldn't do either unless you're expecting to attain some really high RPMs.

Prices? I dunno.Very dependant on the shop. Make sure you get a reputable shop.

rnoswal · 10-22-2006, 03:45 AM

Knife edging is always helpful when it comes to windage in the oil pan. Not to mention the lightening wouldn't hurt either. Micro polishing will help the bearings last longer, but you may as well look for a coating on the bearings and pistons too. Use a synthetic oil, aluminum flywheel and it will be a fast revving engine for really quick shifting.

Russ

tone loc · 10-22-2006, 04:07 AM

what is knief edging and mirco polishing?

Murd · 10-22-2006, 04:19 AM

I don't know about micro polishing, but knife edging, they sharpen the counterweights on the crank to "cut" through the oil more efficiently.

10-21-2006, 02:07 AM	#1
abhattan 3" Exhaust Join Date: Oct 2006 Location: Brentwood, New York Posts: 162	Crankshaft work Hi everyone, this is my first forum, so bear with me. I am about to rebuild a 7M-GTE and would like to know what Knife edging and Micropolishing is when it comes to cranks. And about how much would something like this cost?

10-22-2006, 04:19 AM	#6
Murd 3" Exhaust Join Date: Jul 2006 Location: Vancouver, WA. Posts: 233	I don't know about micro polishing, but knife edging, they sharpen the counterweights on the crank to "cut" through the oil more efficiently. __________________ 1989 N/A Targa 5spd. Metallic Grey, w/grey interior. No mods done.

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10-21-2006, 05:47 AM	#2
tone loc 20psi boost Join Date: Jun 2006 Location: Chicago Posts: 706	sorry but what is that?

10-22-2006, 01:46 AM	#3
WiseAssJester 3" Exhaust Join Date: Sep 2005 Location: Reno Posts: 77	I wouldn't do either unless you're expecting to attain some really high RPMs. Prices? I dunno.Very dependant on the shop. Make sure you get a reputable shop.

10-22-2006, 03:45 AM	#4
rnoswal Lexus & 550's Join Date: Apr 2005 Location: Bossier City LA Posts: 556	Knife edging is always helpful when it comes to windage in the oil pan. Not to mention the lightening wouldn't hurt either. Micro polishing will help the bearings last longer, but you may as well look for a coating on the bearings and pistons too. Use a synthetic oil, aluminum flywheel and it will be a fast revving engine for really quick shifting. Russ

10-22-2006, 04:07 AM	#5
tone loc 20psi boost Join Date: Jun 2006 Location: Chicago Posts: 706	what is knief edging and mirco polishing?