Re: Who makes the best timing chain?
 

MEXJOE, you may have found your answer .050 clearence on the exhaust + loose chain, yeah that's not gonna work. Before you go out and try to find a timing chain that doesn't stretch maybe have whoever does your engines build in a bit more clearence, not trying to be a smart ***** just a suggestion.Static measurment of .050 in my opinion is not near enough add in chain slack and cam twist you have a disaster waiting to happen. Not saying an engine can't be run with this tight of clearence cause I know a few who do it but it's CLOSE! BTW been running Cloyes chains on my stuff for years, 380lbs. on the seat 10,000 RPM, no issues .050 on intake .070 on exhaust. Good luck with your engine.

Re: Who makes the best timing chain?
 

MEXJOE,
.050 is tight on ex,if anything goes wrong like say dowel pin breaks in cam or chain got loose/stretched it will get ex valve will get closer,in will get farther away.
Also when valvetrain is loaded(spring pressure) piston to valve will changed some,ex will lose clearance and in will gain clearance.
If this is bracket engine I would shoot for around .090-.100 clearance,this is safe number.
Yeah you can run less,but have to do so carefully,when on the edge you can fall off.
Hopefully you got lucky and did'nt do too much damage.
Mike Taylor 3601

Re: Who makes the best timing chain?
 

I type slow Joe posted while I was typing.
I also have run almost only Cloyes for at least 15 years in almost every engine I build with a chain.
Mike Taylor 3601

Re: Who makes the best timing chain?
 

Im glad u typed it slow cause I read slow. HeHeHe
reed

Re: Who makes the best timing chain?
 

I do peck on keyboard w/2 fingers,and it has to be enough light to see keys.LOL
I graduated in 1985,never thought I would need to type
Mike Taylor 3601

Re: Who makes the best timing chain?
 

What everyone calls timing chain stretch is actually wear.
Both the gear and pins will wear, based on the loads the timing set experiences from operating RPM levels and the high spring rates used in the valvetrain.

The reason I believe Rollmaster is superior to other makes is due to their use of Nitrided billet gears and their premium sets use a German Iwis chain.

Re: Who makes the best timing chain?
 

What about link style chain sets? Ive always heard they were better than a roller style because of less harmonics being transferred through the valve train..Anyone else heard this?

Re: Who makes the best timing chain?
 

I think Grumpy used to claim that back in the '70's ...

Re: Who makes the best timing chain?
 

In the 70s all the best Pro-Stocks,Modified Elim,Stockers and Super Stockers used aluminun nylon upper gears and link belt chains,they dampened harmonics better than steel gears .We never had a failure with the Alum-Nylon -Link-belt stuff ,and later Jesel belt drives became the norm,with the rubber belt also dampening harmonics.Bill C.

Re: Who makes the best timing chain?
 

There are still some link style chain sets used for racing.
One example is the Ford Racing timing set, Part Number M-6268-F302.

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