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Old Oct 9, 2005 | 03:11 AM
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roger dowty's Avatar
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roller chain ?

I was looking at comps cam kit with timing chain and it is a double...non roller. What is the diff. I know...rookie!!!
 
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Old Oct 9, 2005 | 07:56 PM
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The Comp Cams Magnum Double Roller timing set for a 35C/351M/400 is Part# 2121.

The roller should be a 1/4" diameter cylinder that rolls on a pin. You may have a non-roller set.
 
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Old Oct 9, 2005 | 08:41 PM
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i think it's edelbrock? that advertises non-roller chain for less stretch. i've run both roller and non-roller, the non-roller may actually stretch less. some are refered to as "double row" chain.
 
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Old Oct 9, 2005 | 08:48 PM
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The roller cuts friction loss. The non-roller looks more like a double bicycle chain. It has a solid link.
 
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Old Oct 9, 2005 | 09:15 PM
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friction where? the "rollers" or "pins" don't move anywhere while engaging the sprockets. to me the rollers are built in slop.

let it be known that i'm no particular edelblah fan. from their site,

Edelbrock Performer-Link by Cloyes
TRUE-ROLLER TIMING CHAIN SETS Performer-Link timing chain sets are for use with Edelbrock or stock cams. They have a solid-bushing chain for a true bearing surface that rolls with the sprockets, eliminating chain stretch.
 

Last edited by grclark351; Oct 9, 2005 at 09:24 PM.
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Old Oct 10, 2005 | 12:35 AM
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I didn't buy the set yet...
 
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Old Oct 10, 2005 | 01:16 AM
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I boght the comp cams xe262 k-kit. Sure looks like a double roller to me.
 
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Old Oct 10, 2005 | 04:33 AM
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could be a misprint- can't tell by pics. SO you went with 262!!! wish I had your # already to compare!
 
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Old Oct 11, 2005 | 12:38 AM
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Roger, went to the garage today just to make sure I wasn't crazy. The chain that came with the xe262 kit was indeed the part #2121 that danlee eluded to. It is a double roller chain. What # is it you're looking for, to compare to what? I am seriously considering going with the CHI 2v heads. The more I look into it, the better they look.
 
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Old Oct 11, 2005 | 01:01 AM
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Don't know if i could find it- I was looking over a site and saw it and it raised the ? about double roller vs double non roller. I'll be buying a double roller. Can't pass up the opp to learn something ya know? Now I'm on to trying to understand DCR in relation to propane.
 
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Old Oct 11, 2005 | 06:16 AM
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Roger,
I use a DCR of 8.5:1 as the absolute max for pump fuel (93 Octane). Propane has an Octane rating that is much higher than 93. I have no experience or information that tells me what the max DCR is with Propane.

Maybe you should post something on the alternative fuels forum.
 
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