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Old 12-09-2014, 09:34 AM
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Originally Posted by Black Baja
H-beam will twist under detonation as the piston moves from tdc as an I-beam will not due to the I-beam design.
i have never heard of a rod twisting due to detonation,where did you get this information.i am asking because i am always wanting to learn.
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Old 12-09-2014, 09:37 AM
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Originally Posted by Black Baja
I didn't know there was mountains in Illinois. Do you consider yourself a "mountain billy"?
thats some funny chit right their!
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Old 12-09-2014, 09:51 AM
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Originally Posted by FIXX
we run bme rods in the mountain motors..2000 plus hp range...i have to admit that i do run 5w20 syn in one of my toys and its been living at 10600 rpm range since 2005..
I have to ask... How many AA's does your toy take. That thing has gotta take a lot if it's spinning 10,600 rpm's. No really who's heads are on that thing that will support that many rpm.
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Old 12-09-2014, 02:32 PM
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Originally Posted by Black Baja
H-beam will twist under detonation as the piston moves from tdc as an I-beam will not due to the I-beam design.
Are you going to substantiate this claim? I don't see how a rod with its symmetrical shape would ever impart a twisting motion in tension or compression.
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Old 12-09-2014, 02:53 PM
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Originally Posted by Cole2534
Are you going to substantiate this claim? I don't see how a rod with its symmetrical shape would ever impart a twisting motion in tension or compression.
When you detonate the piss out of the motor the piston will want to rotate in the bore. The I-beam design is alot stronger as far as twisting goes. I think I still have some pics in my old phone of a set of rods that came out of a nitrous motor with a bad tune up. This is not a big mystery to nitrous builders.
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Old 12-09-2014, 03:10 PM
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I never heard of twisting myself, not to say it cannot happen, but never once heard that...
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Old 12-09-2014, 03:18 PM
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Originally Posted by Full Force
I never heard of twisting myself, not to say it cannot happen, but never once heard that...
A little before your time.......look up Chubby Checker.
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Old 12-09-2014, 03:20 PM
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Originally Posted by brian41
a little before your time.......look up chubby checker.
lol
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Old 12-09-2014, 03:34 PM
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Cool. I'd like to see pics of those twisted rods.
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Old 12-09-2014, 04:03 PM
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Just my 2 cents butt most of the time when a Rod fails.... something else has happened first (spun bearing) oiling issue "something" its not to often they just break , not saying they can't or won't break but rarely.... I was IHRA Record Holder in 84 and 85 in A-Gas 468 bbc with tin-dipped chevy rods 8600 rpms never a problem. I know thats different from boat engines but as others have said.... tune up.. Clearences when built etc etc will blow one up quickly.

Last edited by jamie 10017; 12-09-2014 at 04:07 PM.
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