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Old Mar 12, 2010 | 03:39 PM
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Default timing chains?

I am getting ready to install my ECS blower cam and i am down to getting a mellings oil pump and a timing chain. I am looking at the c5-R timing chain or a double timing chain. Since they are around the same price that is not a concern. Which is a better option? Also spoke to chris at ECS and he said the new mellings oil pumps are not having any clearence issues with the double chains. Any tips?
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Old Mar 12, 2010 | 03:50 PM
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Stock ls6 has always treated me right. Failures are awfully rare, and you might be able to make a case that they are more rare than the aftermarket doubles.
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Old Mar 12, 2010 | 04:26 PM
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Default timing chain

If your changing timing chains,,,,or have the harmonic balancer off for any reason....replace your timing chain cover oil seal at the same time.
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Old Mar 12, 2010 | 04:26 PM
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LS2 timing chain
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Old Mar 12, 2010 | 04:56 PM
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Originally Posted by corvette8189
LS2 timing chain


The LS2 chain is beefier than the LS1/6 chain and cheaper than the other options. So, unless you need something stronger than the LS2 chain, I would just go with that.
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Old Mar 13, 2010 | 12:38 PM
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If your running any valve springs stronger then the LS2 valve spring I would go for the double roller chain.
GM does not over design anything, the bean counters won't let them!
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Old Mar 13, 2010 | 12:45 PM
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Ls2
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Old Mar 13, 2010 | 06:51 PM
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I am fixing to buy the c5 r chain.

My timing chain broke on the dyno, a decent amount of damage was done. Avoid the headaches and do it right.
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Old Mar 13, 2010 | 06:56 PM
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The LS2 chain works great. I have used in numerous cars without problems, even at 7100rpms.
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Old Mar 13, 2010 | 06:59 PM
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I run the LS2, I would go with that or the C5R chain.
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Old Mar 13, 2010 | 07:05 PM
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Originally Posted by darren6114
I am fixing to buy the c5 r chain.

My timing chain broke on the dyno, a decent amount of damage was done. Avoid the headaches and do it right.
Have not heard much of them breaking, as the bolts sometimes walk out. A little lock tight should cure it?
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Old Mar 13, 2010 | 07:26 PM
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i run the c5-r chain
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Old Mar 13, 2010 | 09:43 PM
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Originally Posted by bullitt4110
I run the LS2, I would go with that or the C5R chain.
I did the D/roller chain with the stock cover it will work great, if you just do a little grinding on the inside of it at the key points...
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Old Mar 14, 2010 | 02:29 PM
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Originally Posted by robert miller
I did the D/roller chain with the stock cover it will work great, if you just do a little grinding on the inside of it at the key points...
I had similar issues...
Installed a double roller and had to grind the Melling oil pump (from ECS) for clearance.
Then had to grind and mill the timing cover to clear the oil pump (spacers installed.)
Installed the IW 8" balancer and then tried to turn the crank after getting it all together and it wouldn't budge. - had to buy an new oil pump
Balancer had damaged the oil pump cover.
Had to turn down the end of the balancer in the lathe.
Also honed out the inside of the stock balancer - used it as a guide to center up the oil pump.
It's been six months and running ok.
Recommend going the LS2 route if possible.
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Old Mar 14, 2010 | 02:40 PM
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thanks guys!
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Old Mar 14, 2010 | 09:07 PM
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Originally Posted by z06sicz
Have not heard much of them breaking, as the bolts sometimes walk out. A little lock tight should cure it?
I am confused to as what you are saying. My chain did break, along with a lifter and bent valves in four cylinders.



Would the c5r chain and melling oil pump have any clearance problems??
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Old Mar 14, 2010 | 10:31 PM
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I have a double roller. I was going to use a LS2, but my engine builder recommended the double roller. It has held up well for me.
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Old Mar 14, 2010 | 11:09 PM
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Originally Posted by HP_Addict
I have a double roller. I was going to use a LS2, but my engine builder recommended the double roller. It has held up well for me.
No problems with my set up....on the D/roller...
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Old Mar 14, 2010 | 11:36 PM
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LS6 chain is no longer avaliable, has been replaced by LS2.

Only issue with LS2 is the chain has alot of slack due to the fact that robots build the LS2. LS3 tensioner cures that problem.

C5r Katech chain is the cream of the crop for single chains
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Old Mar 15, 2010 | 12:49 PM
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katech has them back in stock now

Last edited by QUIKSILVERZ; Mar 15, 2010 at 02:47 PM.
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