Timing chains
12-30-2009, 10:08 PM
#1
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Timing chains I have searched and it seems to be a real unsure subject. I am refreshing my totally stock 96 LT1 and need a timing chain. I see alot use the Cloyes 3145, I would assume that its the regular one and not any of the -XX shorter setups. Any reason why this double roller is 89.95 and the GM performance parts heavy duty roller is 275?
12-30-2009, 10:18 PM
#2
I have the cloyes billet double roller. Very nice timing set. I would assume the GM perfromance parts single roller is more expensive because it utilizes the gear drive on the back of the cam sprocket and also comes with the mating smaller sprocket for the water pump shaft drive. More costly to manufacture. And then there is GM's lovely mark up, which comes with all of their parts!
So I take it you are going with an electric WP? You are probably aware, but you cannot run a double roller and keep the factory WP. The double roller loses the sprocket provision to drive the pump that I mentioned above.
So I take it you are going with an electric WP? You are probably aware, but you cannot run a double roller and keep the factory WP. The double roller loses the sprocket provision to drive the pump that I mentioned above.
Last edited by 355TurboLT1; 12-30-2009 at 10:21 PM. Reason: spelling
12-30-2009, 10:25 PM
#3
If running an EWP, my favorite is the Cloyes 3157, which is the same as the GM LT4 ED minus the WP drive gear, AND it's a tighter fit than the GM ED. It's every bit as strong as the 3145 double roller and guarantees no interference and required grinding on the front of the block. The roller pins are the weak points in these chains and the double roller offers no advantage there.
12-30-2009, 10:49 PM
#4
If running an EWP, my favorite is the Cloyes 3157, which is the same as the GM LT4 ED minus the WP drive gear, AND it's a tighter fit than the GM ED. It's every bit as strong as the 3145 double roller and guarantees no interference and required grinding on the front of the block. The roller pins are the weak points in these chains and the double roller offers no advantage there.
12-30-2009, 10:51 PM
#5
Maybe in a lower output LT-1. I would never run a single in anything over 800hp. That being said I realize the OP is looking for a set to be used in a stock LT-1. The 3157 is not the end all timing chain though. Cloyes makes better ones.
Last edited by 355TurboLT1; 12-30-2009 at 10:53 PM. Reason: spelling
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12-31-2009, 03:04 AM
#8
)BYW, I'm curious to hear why you think a double roller adds anything to a high hp setup. My info is not my own opinion, it comes from Cloyes. Namely their now-retired guru who did the majority of their R&D for the past 35 years. According to him, there were reasons in the past for a double roller. With advancements in materials, things have changed.
Last edited by bowtienut; 12-31-2009 at 03:13 AM.
12-31-2009, 03:53 AM
#9
BYW, I'm curious to hear why you think a double roller adds anything to a high hp setup. My info is not my own opinion, it comes from Cloyes. Namely their now-retired guru who did the majority of their R&D for the past 35 years. According to him, there were reasons in the past for a double roller. With advancements in materials, things have changed.
12-31-2009, 07:39 AM
#10
They're not my claims; just relaying info I got from Cloyes.
I found the other guy's claim about needing a double roller for 800 hp just short of preposterous!
My first post was only trying to help the OP avoid unnecessary expense and aggravation. Nothing wrong with a double row, just may have to grind on the block for clearance. And the 3157 set is about 1/3 the cost of the GM ED. Also, over the years, people have run stock LT1 timing sets in performance builds with great success, depite the wimpy appearance of it......so there's another option! Only, I would get the Cloyes PN rather than the GM for the tighter fit.
I found the other guy's claim about needing a double roller for 800 hp just short of preposterous!
My first post was only trying to help the OP avoid unnecessary expense and aggravation. Nothing wrong with a double row, just may have to grind on the block for clearance. And the 3157 set is about 1/3 the cost of the GM ED. Also, over the years, people have run stock LT1 timing sets in performance builds with great success, depite the wimpy appearance of it......so there's another option! Only, I would get the Cloyes PN rather than the GM for the tighter fit.
12-31-2009, 07:47 AM
#11
Guy is refreshing a STOCK engine, why consider anything other than a stock timing set?
Despite all the talk of "upgrading" who breaks stock chains, just about nobody, the FEW I am aware of in my almost 10 years screwing with this platform are so few and dissimilar they should be written off as freak failures which happens with any mass produced part.
I have actually read more stories about the LT4 ED set breaking than the stock set.
Despite all the talk of "upgrading" who breaks stock chains, just about nobody, the FEW I am aware of in my almost 10 years screwing with this platform are so few and dissimilar they should be written off as freak failures which happens with any mass produced part.
I have actually read more stories about the LT4 ED set breaking than the stock set.
12-31-2009, 09:06 AM
#12
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Guy is refreshing a STOCK engine, why consider anything other than a stock timing set?
Despite all the talk of "upgrading" who breaks stock chains, just about nobody, the FEW I am aware of in my almost 10 years screwing with this platform are so few and dissimilar they should be written off as freak failures which happens with any mass produced part.
I have actually read more stories about the LT4 ED set breaking than the stock set.
Despite all the talk of "upgrading" who breaks stock chains, just about nobody, the FEW I am aware of in my almost 10 years screwing with this platform are so few and dissimilar they should be written off as freak failures which happens with any mass produced part.
I have actually read more stories about the LT4 ED set breaking than the stock set.
