Subject	Re: Re: Re: Interesting rod bearing wear pattern.....
Posted by	Renner on June 29, 2004 at 10:07 PM
	This message has been viewed 91 times.
In Reply To	Re: Re: Interesting rod bearing wear pattern..... posted by kuah@splparts.com on June 29, 2004 at 07:34 PM
Message	I'm sorry, upon re-reading I think my statement was a bit misleading. It was supposed to read that the most damaging resonance of those dampened by the crank pulley was the 4th order harmonic. Adding balanced mass to any rotating spring-damper system will dampen any of the lower order harmonics as well, it's not just limited to the 4th order as I made it sound. Because of the amplitude of the 4th order resonances, it seems that during development the 4th order is often looked at for damage prevention, vs the lower orders which seem to be addressed more for passenger comfort NVH issues. By the way, NVH is far from my area of practice, this is just some stuff I learned from test cell runs a while back so I figured I would throw it out. If anybody has some more accurate test info please share it, this is a topic that has always interested me. :) www.ipsmotorsports.net.
Follow Ups	Interesting rod bearing wear pattern..... - Ash's Z (In Progress) 14:37:16 06/29/04 Macro mode. - YugoBernie (NoVA) 14:43:28 06/29/04 interesting indeed - spyhunter(nj) 14:44:40 06/29/04 pfttt what evidence? That's not a controlled test - AzHeat 14:55:06 06/29/04 I think he was joking.... (n/m) - ZEngineer (TT) 14:56:32 06/29/04 I hope so. (n/m) - Kenny 14:58:46 06/29/04 i heard you where banned.. what happened? (n/m) - Halo Z 15:06:37 06/29/04 They banned AssHeat by accident. Damn typos... (n/m) - BigTDogg (MA) 16:51:58 06/29/04 I banned yo Mama (n/m) - AzHeat 19:21:53 06/29/04 I remember 5th grade. Man, that was cool (n/m) - BigTDogg (MA) 19:57:53 06/29/04 5th grade was better the 2nd 2rd and 4th time :-) (n/m) - TARGETZ 21:04:19 06/29/04 DOh (n/m) - Halo Z 07:11:31 06/30/04 You won't find a controlled test environment. - Marshall 15:08:04 06/29/04 In other words it is just speculation and not proof. (n/m) - AzHeat 18:46:53 06/29/04 That's the best we'll get. - Marshall 02:50:28 06/30/04 Your suggestions dont fit the evidence though - - Ash's Z (In Progress) 15:13:03 06/29/04 I look at it this way- - Marshall 15:17:44 06/29/04 agreed (n/m) - aliaZ 15:23:34 06/29/04 Very logical reasoning, also what Ash is showing proves it - PLEAZURE in CA (SD) 15:28:12 06/29/04 the reason manufacturers dont use them is simple - ZEngineer (TT) 15:35:50 06/29/04 False (n/m) - aliaZ 16:18:00 06/29/04 please elaborate - ZEngineer (TT) 16:19:59 06/29/04 ok then :) - aliaZ 16:30:40 06/29/04 I disagree with this - Marshall 16:33:24 06/29/04 Way to jump to conclusions and make unwarranted assumptions - AzHeat 19:10:41 06/29/04 You can have obstruction in a main that feeds the rod - AzHeat 18:53:41 06/29/04 I've always had the concern and used to have a strong - Ash's Z (In Progress) 15:06:26 06/29/04 or maybe they weren't torqued down properly? (n/m) - ZEngineer (TT) 15:10:59 06/29/04 I wouldn't think so - I am meticulous with this part of the - Ash's Z (In Progress) 15:17:22 06/29/04 and when's the last time you calibrated that torque wrench? - ZEngineer (TT) 15:18:42 06/29/04 I thought you were a steal beam torque wrench fan? (n/m) - EricTTZ 15:27:24 06/29/04 What is the torque spec on the OEM rod bolt nut? I don't - AzHeat 19:20:19 06/29/04 quick question - Marshall 15:14:43 06/29/04 Good question, really. The OEM pulleys appear to be - Ash's Z (In Progress) 15:24:18 06/29/04 Re: Interesting rod bearing wear pattern..... - Renner 15:28:21 06/29/04 The rear cylinders also drive the frontal cylinders through - Ash's Z (In Progress) 15:46:56 06/29/04 Re: The rear cylinders also drive the frontal cylinders through - Renner 16:25:18 06/29/04 I don't know about this: - Marshall 16:49:05 06/29/04 Re: I don't know about this: - Renner 17:45:04 06/29/04 Good point - SeedyROM 19:29:51 06/29/04 Re: Re: Interesting rod bearing wear pattern..... - kuah@splparts.com 19:34:40 06/29/04 Re: Re: Re: Interesting rod bearing wear pattern..... - Renner 22:07:01 06/29/04 Re: Re: Re: Re: Interesting rod bearing wear pattern..... - kuah@splparts.com 23:28:12 06/29/04 Re: Interesting rod bearing wear pattern..... - Renner 07:50:29 06/30/04 Re: Re: Interesting rod bearing wear pattern..... - kuah@splparts.com 09:56:58 06/30/04 Re: Re: Re: Interesting rod bearing wear pattern..... - Renner 10:36:54 06/30/04 Re: Interesting rod bearing wear pattern..... - morepower2 15:29:41 06/29/04 I agree, thank you (n/m) - AzHeat 19:00:59 06/29/04 Hey Mike, you should hang out here more often! - AztecTT 01:02:51 06/30/04 Hmmm..... - Spongerider :) 15:37:36 06/29/04 Great link Dean! (n/m) - Ash's Z (In Progress) 16:11:54 06/29/04 This looks like the answer. - Kenny 16:53:06 06/29/04 Shouldn't it be more worn at the far end with Harmonics? - KaZ (VaBch) 15:58:02 06/29/04 One would think so.. What I am wondering about is the - Ash's Z (In Progress) 16:20:04 06/29/04 The rear load would be much greater proportionately. - Kenny 16:57:49 06/29/04 That's why the front twists more than the back - AzHeat 19:13:38 06/29/04 Hey Ash, build this: - Marshall 17:14:41 06/29/04 whoa (n/m) - Spee 18:30:46 06/29/04 holy damn - aliaZ 19:37:03 06/29/04 nothing like strapping on a potential bomb on your back. (n/m) - AzHeat 19:54:38 06/29/04 LOL (n/m) - BigTDogg (MA) 20:02:53 06/29/04 Re: One would think so.. What I am wondering about is the - morepower2 12:57:15 06/30/04 interesting quote: - Marshall 17:03:55 06/29/04 Re: interesting quote: - morepower2 12:59:07 06/30/04 stock pulleys are designed by the factory for longevity - Slowninja(Sport600 Inconel Z) 17:58:30 06/29/04 My Opinion...... - Greg D. (Specialty-Z) 18:32:26 06/29/04 Re: My Opinion...... - morepower2 13:01:20 06/30/04 Re: Interesting rod bearing wear pattern..... (n/m) - Z pearl 14:57:31 07/02/04
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