crankshaft balance
Thread Starter
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
crankshaft balance
added photos
Is it standard practice to use an agle grinder and grind on the crankshaft to remove mass for balancing purposes ??? I mean, not that it really matters but it sure looks ugly
======================================== ===============
more photos of the balance holes and the grinding:
doesn't look as ugly as the photos further down this page..... still, I'd like to polish it a little but I'm afraid of getting dirt in the engine....
Is it standard practice to use an agle grinder and grind on the crankshaft to remove mass for balancing purposes ??? I mean, not that it really matters but it sure looks ugly
======================================== ===============
more photos of the balance holes and the grinding:
doesn't look as ugly as the photos further down this page..... still, I'd like to polish it a little but I'm afraid of getting dirt in the engine....
Last edited by MYBAD79; Feb 15, 2007 at 08:21 PM.
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
Likes: 384
From: South of giving a damn
St. Jude Donor '11, '17
Generally the counter weights are drilled. The flat area will cause a small amount of drag (that's why the counter weights are knife edged). Strange way to do it, but on a street engine should be OK. If this is a race engine, you're screwed.
Drifting
Joined: Aug 2004
Posts: 1,883
Likes: 124
From: Lubbock TX
I don't agree that on a race engine, he's screwed. It may not be the pretties way, may cause a bit of windage but I'd bet there's not a horsepower difference between one ground like that and one that's been drilled. As long as the shop has a good reputation and all dimensions are good, run hell out of it.
Drifting
Joined: Nov 2004
Posts: 1,631
Likes: 293
2020 C3 of the Year Finalist - Modified
here's the beautiful job my machine shop did with mine....they said it was way out of balance, but they definately could've done a better job.....my motor's been running for about 4 months now....
Le Mans Master
Joined: Apr 2006
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Le Mans Master
Joined: Dec 2006
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Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Who is the manufacturer of the crank?
Thread Starter
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
Mine is drilled too.... I expected it to be drilled that's why I didn't mention it or posted pictures of the holes..... I also think that if you grind on the crank you can polish it a little and make it look a little nicer, especially if you sell a short block without oil pan to hide the half a$$ job....
bluegtp - although it's likely going to run fine.... that's fugly...... people just don't take pride in their work nowadays. I'd be ashamed giving a crank like this to a customer :o
bluegtp - although it's likely going to run fine.... that's fugly...... people just don't take pride in their work nowadays. I'd be ashamed giving a crank like this to a customer :o
Le Mans Master
Joined: Oct 2006
Posts: 7,123
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From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
I hope that's not as ugly as it looks in the picture. Any sharp edges will create stress risers, and stress risers create cracks, and cracks create broken parts, and broken parts create...........
Same for taking a grinder and removing metal. As long as it's polished afterwards, no problem.
Same for taking a grinder and removing metal. As long as it's polished afterwards, no problem.
