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by **Begle1** » Tue Oct 23, 2007 10:27 pm

Anybody know what the crankshaft, connecting rods and pistons weigh on any old stock 5.9?

by **2muchtq** » Wed Oct 24, 2007 7:01 pm

not exact... but I'll bet the crank alone will go 300-325

by **Begle1** » Wed Oct 24, 2007 7:43 pm

That sounds way too much... I thought it was 150-200 for the crank, then 30 each for the connecting rods?

by **Fnschlaud4620** » Wed Oct 24, 2007 8:37 pm

crank weighs right in around 140lbs

by **2muchtq** » Wed Oct 24, 2007 9:09 pm

Must not have eaten my Wheaties.

The ones on my uncles floor feel every bit 300.

by **KTA** » Thu Oct 25, 2007 10:52 am

Actually I think the crank less flywheel is more like 110-120lb. A piston with rings, pin, and snap rings is about 5lb and the rod is about 5 too.

by **Fnschlaud4620** » Thu Oct 25, 2007 11:53 am

Well then I got screwed on shipping then didn't I

by **Begle1** » Thu Oct 25, 2007 3:18 pm

A connecting rod is only 5 pounds?

Damn, they sure look more substantial than that on pictures...

by **KTA** » Thu Oct 25, 2007 3:25 pm

I threw one on the scale before I posted that its actually more like 4.7lbs for a rod but it didn't have a bearing in it so I figure 5 be close enough. :roll:

On your shipping you probably paid for packaging too.

by **Fnschlaud4620** » Thu Oct 25, 2007 5:01 pm

The guy I got the a crank from said that he weighed it and it came to 140 AND i paid extra for packaging, OH well some day I'll learn.

by **mhuppertz** » Mon Nov 12, 2007 7:50 pm

Wonder how a 5.9 would react to knife edging and lightening the rotating assembly and using a Fluid Damper to keep the crank from cracking. I know it would be a little harder to get the dude out of the hole without killing the engine because of the loss of spinning mass, but I bet it would wrap much faster....

by **cummins king** » Mon Nov 12, 2007 7:52 pm

thats what they did with banks sidwinder race truck, and also thats what audi did with its 24 hour event car
5000rpm no problem, better have a desent set of bearings though

by **mhuppertz** » Mon Nov 12, 2007 8:31 pm

cummins king wrote:thats what they did with banks sidwinder race truck, and also thats what audi did with its 24 hour event car
5000rpm no problem, better have a desent set of bearings though

Yea, align honing the mains wouldn't hurt either. I wonder how the stock oil pump holds up under 5k revs?? Enough volume?

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Rotating mass of the 5.9?

Rotating mass of the 5.9?

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