What's the difference between the Hinson c7r chain vs this one?
 

Looks like just the price, good find.

That's what I'm thinking. I'd like some confirmation though.

Why pay 75 for only a chain when you can have a whole three piece set for $100
http://progearweb.com/4000/pg4210.htm

Because unless it's a seamless roller IWIS chain that's comparable to either mentioned above its an apples to oranges comparison.

As if a non seamless chain won't handle what you're doing......great put the best strongest can't never ever break chain on the stock gears....all I'm saying is it's an economical NEW set that if you do a little research about the process their gears go through, you just might be interested....:cheers:

Lol. I get what you're saying. I'm not using stock gears fwiw...even though I haven't heard of any stock failures.

One word: marketing.

Someone has to get paid for all the work and effort made to advertise a new product. They can't be selling that product for peanuts.

I have corresponded with IWIS (JWIS) in the past. As stated in that thread, they make several chains with the correct pitch that will fit the LS motor. They are of varying quality. The C5R chain is the one used on the BMW M5 10 cylinder motor and is an excellent chain.

Here is the same IWIS chain sold by Brian Tooley that ProServ is selling. It is not the C5-R chain that Katech sells. It is 3% stronger than the Rolon chain that comes with the ProGear timing set. Thanks to information that A.R. Shale Targa told me, I bought the ProGear set and have no regrets with it. The gears are Made in USA. Not many timing sets can say the same thing. 3% less that the standard IWIS is nothing in my book. The Rolon is better than the Renold LS2 chain.

Can I ask a quick little "just want to make sure" question ? Most timing chains have a initial stretch. Is it enough to change cam timing by a half a degree ? If I want to end up with a Intake Valve Close of 43 degrees should I have my cam ground 43.5 or 42.5 IVC ?

That's an excellent point that I've never considered. I wonder if the different chains have different amounts of stretch, and if so if anyone has ever tested that. It would be great info to know when trying to build for max effort or blueprinting an engine. From everything I've seen on here and the interwebz...it seems that IWIS/JWIS sells only 3 seamless chains for LS engines. This one (3SR60-2), the limited production IRL chain, and the C7R one that Hinson markets. I've never seen them post an IWIS pn for it so that's why I wonder if it's not the same one. I wonder if a seamless one would stretch less?

Chain stretch
 

I am sure the different designs have different amounts of stretch but most of the specifications for the chain length are with some type of load on the chain when being measured so that should help reduce that variation. Also since we are talking about fairly small amounts of stretch, differences between different chains would be an even smaller variation (a fraction of a fraction).

The IRL chain is no longer made, but at the time was made by Renold for Cloyes to support the IRL motors. The chains were hand built using premium components, everything shot peened and the link plates were “fineblanked” instead of stamped. They probably had a strength that was 30-50% better than a conventional single roller.

Not so sure I would be too concerned about a seamless chain, the IRL chain was not seamless and it was the strongest chain ever made. I would also think the seam would provide better oiling.

Cospeed2 claims that cloyes will make another run of IRL sets if 20-30 people were committed to it.

All IWIS chain is not the same either. The founder of Rollmaster/Romac Bob Brackum worked with Iwis to develop the chain that Rollmaster still uses today. One key component is Rollmaster IWIS chain is pre stretched in assemblies, meaning if the set is 60 links it is assembled then stretched. All chain is pre-stretched but in runs of chain that can be 100' long. This is part of the reason that Rollmaster sets last so long. I have sold and used the stuff for 19 years.

Looks like I hijacked another thread. Here's why I asked about chain stretch. The cam I want has the events IVO>0 IVC>43 EVO>48.5 EVC>1.5 If I ask for a 223 wit ICL of 111 and 230 with ECL of 114 and the Rolon chain I have does initial stretch of 1/2 a degree, I arrive at my numbers. yes ?
Getting back to drain89 original question, I wish Brian Hinson would add his reply to this thread. I'm sure we all appreciate his sponsorship of our forum and his reply may teach us something. If not, this thread is still full of win.

That's the one I have, Thanks for telling me about it !

Agreed! I wish Brian would chime in. I'm sure he picked that chain for a reason and I'd like to know why.

Thanks for your extra info Chris,

They're also significantly cheaper than the other hyped chains, I already had one fitted and then succumbed and spent too much on a hyped one, it's still in the packet and the Rollmaster is in the engine after some more research with them. I'm not sure if the mods will let me post the link below but if they do there's plenty of info there.

Best wishes,
Jason.

http://www.romac.com.au/TCS.html