Who makes the best timing chain? - Page 4

buzzinhalfdozen · 08-14-2013, 08:41 AM

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.

Mike Taylor 3601 · 08-14-2013, 08:59 AM

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

Mike Taylor 3601 · 08-14-2013, 09:03 AM

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

Reed Granrt · 08-14-2013, 09:18 AM

Quote:

Originally Posted by Mike Taylor 3601

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

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

Mike Taylor 3601 · 08-15-2013, 07:56 AM

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

SSDiv6 · 08-15-2013, 09:56 AM

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.

Crisco · 08-15-2013, 09:03 PM

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?

Tim H · 08-15-2013, 09:44 PM

Quote:

Originally Posted by Crisco

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?

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

CFMCNC · 08-16-2013, 12:34 AM

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.

SSDiv6 · 08-16-2013, 12:38 AM

Quote:

Originally Posted by Crisco

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?

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

08-14-2013, 08:41 AM	#31
buzzinhalfdozen Senior Member Join Date: Sep 2006 Location: Bellevue Ohio Posts: 984 Likes: 0 Liked 11 Times in 8 Posts	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. __________________ Joe Buchanan SS/BX 3117

08-14-2013, 08:59 AM	#32
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,362 Likes: 336 Liked 279 Times in 96 Posts	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

08-14-2013, 09:03 AM	#33
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,362 Likes: 336 Liked 279 Times in 96 Posts	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

08-15-2013, 07:56 AM	#35
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,362 Likes: 336 Liked 279 Times in 96 Posts	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

08-15-2013, 09:56 AM	#36
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,036 Likes: 710 Liked 1,538 Times in 575 Posts	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.

08-15-2013, 09:03 PM	#37
Crisco Member Join Date: Jul 2005 Location: Hendersonville, TN 37075 Posts: 223 Likes: 4 Liked 42 Times in 18 Posts	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?

08-16-2013, 12:34 AM	#39
CFMCNC Junior Member Join Date: Apr 2012 Location: Somwhere in NJ Posts: 72 Likes: 4 Liked 3 Times in 3 Posts	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.