I currently have a Comp Magnum double roller (found out its not a true double roller hence this post) #2831.

Im looking at two Cloyes timing sets to use instead as I have enough money in my 306 build I dont want to cheap out on a timing set and use the Comps double roller look alike that is not a true roller.

Cloyes #9-1138 is the first one I am looking at, two piece fuel pump eccentric, cast iron cam gear, billet steel crank gear, 0.250" true double roller links for $41.95 which is cheaper than the $50 I spent for the Comp unit.

Cloyes #9-3138 is the second one I am looking at, two piece fuel pump eccentric, cast iron cam gear, billet steel crank gear, 0.250" true double roller links but this one also states it is hand matched to qualify the correct center distance and minimize runout. This is one priced at $106.

Question is which one is better? I assume the 3138 is but it sounds like I would have to measure the distance between center of crank and center of cam and verify it matches the 4.804" standard center distance. I know my crank was line honed on my engine but not sure if it was enough to change this distance.

So what is everyones consensus on the Cloyes #9-3138 and the #9-1138? It sounds like both would fit the bill for my daily driver truck just one is a bit more specific than the other and not sure if that is something to split hairs over. I just want a true double roller to extend the life of the timing set as well as to reduce friction as well.

 

I have done a lot of research on timing chains and currently have a text message to Summit racing tech department to find out what the name brand of the chain is on Comp cam's 7138 timing gear set. Most timing chains are a no brand import chain that will stretch a fair amount in a couple thousand miles. I have read good reviews with Rolon chains (Great reviews of the Rolon Gold chain) and Great reviews with IWIS chains. Most Rollmaster timing gear set's use German made pre stretched IWIS chains. Some of the Rollmasters come with the standard Rolon chain. The best I found so far is the Rollmaster CS10030. Not cheap but worth every penny from what I have read. The cheapest place I have found it so far is Amazon. Fordstrokers.com recommended the Comp cams 7138 & the SA gear 78151T9. Woody at Fordstroker builds a lot of engines and I trust what he says. I have not yet checked to see what chain is on the SA gear timing set yet. With everyone cheaping out to save a buck in the aftermarket you have to check before you buy.

Update. Summit texted me back and said Comp cams does not say what the name of the chain is. Apparently its to hard to open the package and look to see if it has a name on it. Guess I will have to call Comp cams and see if I can get some info.

Rollmaster Timing Set SB Ford "race" CS10030 - FlowTech Induction


https://www.summitracing.com/parts/c...4aAvsyEALw_wcB

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Either one will work just fine with a hydraulic roller cam I think that the fancy chain is a waste of money for the application. Also, be careful with "line bore" sets because it is easy to get the chain too tight. In one of David Vizard's most recent You Tube videos he tells a story about how big of an effect a tight chain had on performance when running one of his dyno mule engines. Loose to the point of really flopping was just fine, too tight very bad.

 

See thats what I am afraid of right now I dont believe my block was line bored I know it was line honed on the mains at least thats what the description of the work I was provided said. Thats why I was looking at the standard set, but I really want to get a good set without spending more than I have to. I have the Comp Cams Magnum timing set but its not a true roller like it was marketed as through summit. I can get the cheaper Cloyes one which is a true double roller but some of the reviews made it sound like there was way too much slop in the chain on their engine resulting in some 4* of crank movement.

I try to take reviews with a grain of salt but I also dont want to blindly buy without checking first. Im just as happy spending $42 as spending $106, I just want a nice fitting true double roller set that wont wear out on me quickly and require engine disassembly. I know good true double roller timing sets can easily go 150k - 200k miles with proper engine service intervals.

 

Thanks for the links I will check them out.

 

The Rolon chain is made in India but I haven't had any problem with it in the sets that I've used for mild applications. Some timing sets come with the Iwis chain and some with the DID Borg Warner.

 

Ive heard of some of those. I actually did some thinking on it and talked with a few more people I know for my application as a daily driver in a truck that wont see over 5,500 rpm (redline is 6,000) the $106 matched set is over kill and the $41 set would be sufficient for my intended use, it is better than the more expensive Comp magnum timing set I bought last year when I was buying parts that was priced at $50-$55 and doesnt even have true rollers unlike this Cloyes that I picked up that has oversized 0.250" rollers.

Thanks for the options and the conversation it helped me to think through this to make a informed decision.

 

Back in 04 when I built my 331, I used a Cloyes set for a stock HO 5.0 to turn the Z303 cam with 1.7 rockers. It's never failed me, up to this point in time (2021) This was the O.E double row, roller set. I pulled the engine out a couple years ago to replace a bent connecting rod and there was no noticable slack in the chain.

 

So which Cloyes sets did you guys buy/use?? 9-1138??

 

I don't recall the part numbers but it was the std O.E timing set for a late 80's-up H.O. 5.0 Like I said before, it's a double row, roller chain set

 

I ended up buying the #9-1138

Cloyes Parts

Cloyes Gear 9-1138 Cloyes Street True Roller Timing Sets | Summit Racing

 

Sounds like the 9-1138 that I bought, its $40ish for it and its a true double roller set and is listed as fitting 72 and up with 2 piece fuel pump eccentrics. It also has a napa part number of 201138, Cloyes site also lists this as a performance upgrade for the OE.