Subject	torsion on the crank would be cumulative
Posted by	aliaZ on April 21, 2009 at 1:11 PM
	This message has been viewed 190 times.
In Reply To	It definately would be a good idea, but from what ive seen posted by z324u on April 21, 2009 at 12:31 PM
Message	The crank broke between cylinders 2 and 3, right? I have my doubts that the torque of only the front two cylinders would be enough to shear the crank, hence my belief that it is more of a harmonic issue than a torque issue. We may never know the true cause. It would be interesting to see a close up pic of the fracture though. There may have been an existing flaw that caused a fatigue failure.
Follow Ups	some history that may have attributed to the 1009rwhp.. - TURBOGAGE(MATTZ Garage) 23:43:47 04/20/09 Off topic, but any pics of your splitter installed? (n/m) - ShakaShaun(Denver) 00:00:07 04/21/09 see here... - TURBOGAGE(MATTZ Garage) 01:15:19 04/21/09 That crank was probably bad from the start. - NytWolf 00:05:52 04/21/09 Re: That crank was probably bad from the start. - Tech@EPR 00:48:10 04/21/09 true... but... - TURBOGAGE(MATTZ Garage) 01:35:11 04/21/09 Re: true... but... - Tech@EPR 01:51:30 04/21/09 Matt, what shop did you use? (n/m) - NytWolf 10:53:39 04/21/09 His crank isnt the first ive seen break. Ill be willing to - z324u 01:22:44 04/21/09 Can you post close-up pictures of the fracture surface? - CaliguyPurdue (redesigning) 04:12:52 04/21/09 Wow. (n/m) - BradZ (UF) 08:10:30 04/21/09 I see you are running an UR pulley as well - aliaZ 08:41:48 04/21/09 x2. I am definitely now sold on the ATI Street Dampener. (n/m) - MixManMash 11:32:18 04/21/09 It definately would be a good idea, but from what ive seen - z324u 12:31:50 04/21/09 torsion on the crank would be cumulative - aliaZ 13:11:22 04/21/09 Yea lets get that baby in a SEM ASAP (n/m) - CaliguyPurdue (redesigning) 13:20:18 04/21/09 i dont have the crank anymore, but i believe russel@z1 does. - z324u 14:28:46 04/21/09 Re: It definately would be a good idea, but from what ive seen - Tech@EPR 17:34:29 04/21/09 I'm not aware of anyone that actually machines the journals - aliaZ 22:35:16 04/21/09 Doesn't SZ do this? (n/m) - The Hawk 23:22:58 04/21/09 not in the manner Tech is describing (n/m) - aliaZ 06:58:17 04/22/09 I saw old posts about crank failures and the lack of a - Yoshi 15:37:53 04/21/09 That is some serious carnage there. :( - spotz 10:10:36 04/21/09 Have you thought of getting any cryo treating done to it? (n/m) - KongZTT GT28RS MD 10:15:53 04/22/09 Sorry but what is a "cam carriers"? (n/m) - ZXRider(SoCal) 02:54:46 04/21/09 bearing caps that secure the cam to the head (n/m) - aliaZ 08:37:06 04/21/09 Thank you. (n/m) - ZXRider(SoCal) 09:00:17 04/21/09 I find it hard to believe that the bearings looked good - ztunerz 10:12:09 04/21/09 My bearings looked brand new, and my crank broke. - z324u 12:39:56 04/21/09 I would speculate that the problem is more with..... - canyoncarver 08:54:23 04/22/09
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