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Timing chain tolerance? #612803 02/13/10 10:38 PM 02/13/10 10:38 PM
Joined: Apr 2009 Posts: 228 northeast texas S strokin73cuda OP enthusiast
strokin73cuda OP enthusiast S Joined: Apr 2009 Posts: 228 northeast texas	I have a rollmaster set from my previous build not many miles. It has .530 slop in the chain (side to side)on the current block. I don't know what it had before It was built by someone else, is this acceptable? 496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'

Re: Timing chain tolerance? [Re: strokin73cuda] #612804 02/14/10 01:17 AM 02/14/10 01:17 AM
Joined: Dec 2007 Posts: 486 IL knyech1 mopar
knyech1 mopar Joined: Dec 2007 Posts: 486 IL	I just talked to a dealership a couple weeks ago about my friends 4.3L in his Blazer that I was rebuilding and he said .5in is too much. I have a timing chain tensioner in mine with a billet timing set, that would tighten it up knyech1- '71 Sassy Grass Demon 340/904. Pump gas, 1.61 60ft, 7.439 1/8 @ 95mph, 11.824 1/4 @ 111mph "Not too bad for a pump gas 340, full of used parts and hillbilly ported stock heads." - V.B. '03 2500 5.9L HO 6-spd on 35's. 395hp/755ft-lb at tires.

Re: Timing chain tolerance? [Re: strokin73cuda] #612805 02/14/10 09:40 AM 02/14/10 09:40 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: I have a rollmaster set from my previous build not many miles. It has .530 slop in the chain (side to side)on the current block. I don't know what it had before It was built by someone else, is this acceptable? The tighter the better... you would get less cam fluctuation... a tensioner would help alot.... I never tried to figure out the degrees of fluctuation per .1 of slop.... I use a gear drive so I can really tell you what to do

Re: Timing chain tolerance? [Re: MR_P_BODY] #612806 02/14/10 09:53 AM 02/14/10 09:53 AM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	Agree the less the better. It may be time for a .005" shorter chain. On my engine (line bored) I had to go with a .010" shorter Cloyes to get it tight.

Re: Timing chain tolerance? [Re: strokin73cuda] #612807 02/14/10 10:21 AM 02/14/10 10:21 AM
Joined: Jul 2005 Posts: 8,647 ELYRIA,OH B blownzoom440
blownzoom440 B Joined: Jul 2005 Posts: 8,647 ELYRIA,OH	Quote: I have a rollmaster set from my previous build not many miles. It has .530 slop in the chain (side to side)on the current block. I don't know what it had before It was built by someone else, is this acceptable? is that measurement with all the slack on 1 side of the chain? what is the use of the engine,valve spring psi? myself i would replace it with that much slack but i use a roller cam with stiff valve springs. i last checked my timing and with 1/4" slack i had i think less than 1* of play with a large timing wheel on the crank.

Re: Timing chain tolerance? [Re: blownzoom440] #612808 02/14/10 10:36 AM 02/14/10 10:36 AM
Joined: Apr 2009 Posts: 228 northeast texas S strokin73cuda OP enthusiast
strokin73cuda OP enthusiast S Joined: Apr 2009 Posts: 228 northeast texas	Quote: Quote: I have a rollmaster set from my previous build not many miles. It has .530 slop in the chain (side to side)on the current block. I don't know what it had before It was built by someone else, is this acceptable? is that measurement with all the slack on 1 side of the chain? what is the use of the engine,valve spring psi? myself i would replace it with that much slack but i use a roller cam with stiff valve springs. i last checked my timing and with 1/4" slack i had i think less than 1* of play with a large timing wheel on the crank. That is with all the slack on one side. It is an SR headed rb stroker with solid roller setup so the springs will be pretty stiff Dwayne is still working on the heads so I don't know yet exactly how stiff. Thanks I will go ahead and order another timing set. I also have a summit wheel I will check and see what the degrees of slack shows just for kicks and post them here. 496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'

Re: Timing chain tolerance? [Re: blownzoom440] #612809 02/14/10 10:38 AM 02/14/10 10:38 AM
Joined: Mar 2003 Posts: 15,493 the boonies aarcuda I Live Here
aarcuda I Live Here Joined: Mar 2003 Posts: 15,493 the boonies	i had close to this much slop with a brand new chain. i used my old one that had less slop It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspensions, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas.

Re: Timing chain tolerance? [Re: blownzoom440] #612810 02/14/10 11:18 AM 02/14/10 11:18 AM
Joined: Apr 2009 Posts: 228 northeast texas S strokin73cuda OP enthusiast
strokin73cuda OP enthusiast S Joined: Apr 2009 Posts: 228 northeast texas	Heres some pics it shows 1.5 degrees total chain slack. What would be acceptable? 5803588-Chainslack002.JPG (91 downloads) 496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'

Re: Timing chain tolerance? [Re: strokin73cuda] #612811 02/14/10 11:19 AM 02/14/10 11:19 AM
Joined: Apr 2009 Posts: 228 northeast texas S strokin73cuda OP enthusiast
strokin73cuda OP enthusiast S Joined: Apr 2009 Posts: 228 northeast texas	the other way. 5803589-Chainslack001.JPG (80 downloads) Last edited by strokin73cuda; 02/14/10 11:20 AM. 496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'

Re: Timing chain tolerance? [Re: strokin73cuda] #612812 02/14/10 12:06 PM 02/14/10 12:06 PM
Joined: Jul 2005 Posts: 8,647 ELYRIA,OH B blownzoom440
blownzoom440 B Joined: Jul 2005 Posts: 8,647 ELYRIA,OH	Quote: Heres some pics it shows 1.5 degrees total chain slack. What would be acceptable? certainly not in a race engine. what did the chain measure in slack?

Re: Timing chain tolerance? [Re: blownzoom440] #612813 02/14/10 01:24 PM 02/14/10 01:24 PM
Joined: Sep 2003 Posts: 2,008 Sweet Home Alabama M MRMOPAR622 top fuel
MRMOPAR622 top fuel M Joined: Sep 2003 Posts: 2,008 Sweet Home Alabama	MrPBody, Would all of us be better to use a gear drive in a all out race-engine? I would like a belt drive but that is out of my price range. I'm also trying to make my mind up if I will reuse my timing(roll master)chain again. "To Be The Man'You Have Got To Beat The Man" "T/D and Pro-Bracket Racer"

Re: Timing chain tolerance? [Re: blownzoom440] #612814 02/14/10 10:01 PM 02/14/10 10:01 PM
Joined: Apr 2009 Posts: 228 northeast texas S strokin73cuda OP enthusiast
strokin73cuda OP enthusiast S Joined: Apr 2009 Posts: 228 northeast texas	When measuring the chain with all slack on one side it will move a total of .530 left to right. And should I be running a gear drive? I would have thought a good gear and chain to be sufficient. 496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'

Re: Timing chain tolerance? [Re: strokin73cuda] #612815 02/14/10 10:18 PM 02/14/10 10:18 PM
Joined: Jul 2005 Posts: 8,647 ELYRIA,OH B blownzoom440
blownzoom440 B Joined: Jul 2005 Posts: 8,647 ELYRIA,OH	Quote: When measuring the chain with all slack on one side it will move a total of .530 left to right. And should I be running a gear drive? I would have thought a good gear and chain to be sufficient. how many gear/chains can you get for the cost of a gear drive? there is more to it than that buti wanted to .

Re: Timing chain tolerance? [Re: blownzoom440] #612816 02/14/10 11:46 PM 02/14/10 11:46 PM
Joined: Apr 2009 Posts: 228 northeast texas S strokin73cuda OP enthusiast
strokin73cuda OP enthusiast S Joined: Apr 2009 Posts: 228 northeast texas	At least 4 including shipping for some good ones, but your'e right thats not all there is to it but if thats what I need or should be getting then I will. I just really thought they were for blower motors or something really highend. I don't know anything about who has a good geardrive or scince my motor has been correctly linebored now do I need to measure the distance from the crank to the cam centerline? 496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'

Re: Timing chain tolerance? [Re: strokin73cuda] #612817 02/15/10 12:02 AM 02/15/10 12:02 AM
Joined: Jul 2005 Posts: 8,647 ELYRIA,OH B blownzoom440
blownzoom440 B Joined: Jul 2005 Posts: 8,647 ELYRIA,OH	there is a lot of people with roller cams that have chains still.i have only had a roller for a yr so time will tell for me.

Re: Timing chain tolerance? [Re: strokin73cuda] #612818 02/15/10 01:07 AM 02/15/10 01:07 AM
Joined: Aug 2003 Posts: 43,309 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,309 Bend,OR USA	Off the Rollmaster and buy a good Cloyes brand billet set with the needle bearing thrust washer set up I have one on my street stroker with a Comp Cams solid roller with 650 lbs open, that motor and chain set has close to 1200 street miles and lots of laps at the drags with 7000+ rpm shifts, it had less slop than your does the last time I had the motor apart(it broke a lifter wheel in half Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Timing chain tolerance? [Re: strokin73cuda] #612819 02/16/10 11:33 PM 02/16/10 11:33 PM
Joined: Jan 2007 Posts: 7,664 IN A ahy master
ahy master A Joined: Jan 2007 Posts: 7,664 IN	Quote: At least 4 including shipping for some good ones, but your'e right thats not all there is to it but if thats what I need or should be getting then I will. I just really thought they were for blower motors or something really highend. I don't know anything about who has a good geardrive or scince my motor has been correctly linebored now do I need to measure the distance from the crank to the cam centerline? On measuring... the shop I was working with on my line bored "B" engine didn't have a way to measure so it was trial and error. The stock spec Cloyes was way loose, the .005" shorter was better but still a little sloppy and the .010" shorter Cloyes was tight and just right. I was able to return the chains that didn't work so I lost only time with the trial and error.

Re: Timing chain tolerance? [Re: ahy] #612820 02/17/10 01:16 AM 02/17/10 01:16 AM
Joined: Apr 2009 Posts: 228 northeast texas S strokin73cuda OP enthusiast
strokin73cuda OP enthusiast S Joined: Apr 2009 Posts: 228 northeast texas	Did you try using the 5.152 center that the venders use for a center or just go for it by trial and error? I havn't ordered a set yet and I have some time but I would like to get it right the first time. Thanks 496 stroker,Indy srs , new best 6.87 @ 98 1.46 60'

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