This sounds like the chain I just purchased. The man told me it was hand assembled and had hand picked links/pins, the pins were of a chrom alloy, it was pre-stretched, heat treated, the links were made from a stronger alloy, and shot peened.

He also told me it was "obsolete" due to no demand, but they still had a number of them in their facility due to them not selling. I purchased the unit from Summit Racing and they had to call Cloyes to activate the part number as they did not have it listed. Sounds we are buying whats left from the initial production run.

 

This article confirms I purchased the same "Renolds" chain. Check out the article on the right side of the picture where it refers to purchasing a timing set for all out racing. The timing set number is listed as 9-3153AL. If you look at that timing set at the top, it lists 9-194 as the chain for that timing set.

 

Did they mention how many were left? I would like to pick up a complete 9-3153AL timing set if anyone has one left.

 

He told me they still had around 60 chains there. I am unsure of the complete timing set.

 

Please tell me what the part number is that I need to use when order this timing set for an LS3. I am buying a new motor as a result of a second timing chain break. I want the best and am willing to pay for it.

FWIW - I broke an LS2 and a Rollmaster double. I road course the car without a TC dampner. I also was using a ASP underdrive. New motor is getting an ATI. I looked at my factory balancer and noticed that it was weighted as was my flywheel

EDIT: I just called Summit and they said it was a special order item. My motor is coming from LPE so I will see if they can source one for me

 

According to the Cloyes rep I spoke with, the timing set will not work, but the chain alone will work on the stock gears of the LS3. Call Summit Racing and tell them you want part number 9-194. That is the chain that has been discussed in this thread.

 

I just called Summit again they do not have them. Cloyes does have 30-40 chains. Once they run out they will be out for a while. They do not regularly produce them. If you need one call Summit ext 5751 and Tom (I think) will set you up with a drop ship. Mine is on order.

Which gear set do I use? Factory LS3?

 

Any factory gear should work. I am pretty sure the only thing keeping these aftermarket timing gears from working is how they are mounted?

 

1.8t, Cloyes should give you a chain for helping move some real old stock!

Happy you got it figured out.

 

I don't know about the other brands mentioned, but Cloyes offers a single roller timing set for the LS7. You could also use your stock gears and just purchase the Cloyes 9-194 chain. If you want billet gears, purchase the timing set for the LS7 below and the 9-194 chain for a complete set. See here:



YES, its a drop in replacement for any stock LS.

 

i have an ls2 chain... no problems yet knock knock

 

Just curious, but...Have all the chain failures happened when an underdrive pulley is used?

 

That is a good question.

 

I bought an ATI 10% under drive at Corvettes at Carlisle several years ago. One of their technicians was there and I spent some time talking with him. He told me they have not achieved the level of harmonic damping required with any under drive less than 10% and hence the reason they don't make it. If you look at one of ATI's support functions for NASCAR and other racing types, they actually have equipment that they use and will go to the engine builder and set up the damper for them on the fly. I guess the only reason I bring all this up is I personally believe the UD may play a role in this, along with the design of the timing chain damper. The folks who may have some good input on this subject would be Katech. While I am an advocate for a good quality timing chain as failure will wreak havoc with the motor, the chain may only be the symptom of another issue.

 

From the seraches that I did it appears that most are with a ASP underdrive pulley. I am concerned that they are fixing the symptom not the real cause.

Kurt (427) has a ton of experiance with these deals. He talked about the harmonics earlier in this post.

If you read the ATI Catalog you will see that there are different durometer rubber O rings used in different applications.

I would call the techs at ATI and discuss this with them.

I don't have a problem with improving the parts but you may just be masking a bigger problem.

Robin

 

FWIW, my ASP underdrive pulley is not going back on. I am either going to use the stock balancer or the ATI unit.

 

Seems we have a common theme.

Well, just looking at this thread 1.8t and Rob 's 73 both had ASP balancers. I wonder how many other people with chain problems were running an aftermarket balancer and which brand?

IN MY HUMBLE OPINION, concerning balancers I would only use ATI. I'm currently running the ATI 917278 10% UD Y-body balancer.

 

Spend the coin on the ATI and pin it while you're in there. The ATI has a keyway built in and uses a vertical pin. Here's a few pics of mine:

Crank drilled


Compared to stock


Seated on crank


All done

 

That really blows. Time for AFR heads, and some forged stuff too.

 

ill keep the stock pulley on my build till there is a definite answer to why all these chains broke