timing chain stretch
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timing chain stretch

  1. #1
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    Default timing chain stretch

    anyone use this setup, i put one in my bbc has about 2 hours on it breakin and few passes pulled cover and changed cam today and found about 1/2 play in the chain... does anyone make a good chain anymore????
    and it's usa built and not cheap $$$$$

    it's used with a big roller cam but the stretch is scary

    http://www.cloyes.com/HighPerformanc...S/Default.aspx

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    Boat Nut sleekcrafter's Avatar
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    Ran one in my 540 for 8 seasons, it was definitly streached. I'm running a Roll master this go round, suposed to be pre streached, we'll see

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    I have had good luck with the Rollmaster Iwis chain. Other timing mfg do have Iwis but the chain that Rollmaster uses has been and still is exclusive to them. It is assembled in the number of links needed for a given engine and then pre stretched. Most other chain used is stretched in long runs.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

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  6. #4
    gn7
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    I found you can kill a perfectly good chain in minutes from lack of lube. Soaking in oil, lubing with a oil can, etc. doesn't seem to get the job done. I given up on the now, but found that giving them a good heavy shot of motorcycle chain lube inside and out, roll the motor and shoot some more, before putting on the cover greatly increased the life of the chain.



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    steelcomp was here
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    Quote Originally Posted by gn7 View Post
    I found you can kill a perfectly good chain in minutes from lack of lube. Soaking in oil, lubing with a oil can, etc. doesn't seem to get the job done. I given up on the now, but found that giving them a good heavy shot of motorcycle chain lube inside and out, roll the motor and shoot some more, before putting on the cover greatly increased the life of the chain.
    I would guess that there a number of things that contribute to timing chain stretch, like bad valve train harmonics for one. It makes sense to me that if everything is running smoothly, even with a big roller, the timing chain will see less stress and last longer. Just another reason to be on top of valve train geometry.
    Funny you should mention motorcycle chain lube. That's all I've ever used on timing chains and for whatever reason, I've never had one stretch excessively. One of the best (and least expensive) chain/gear sets I've ever had was from PAW. It's been in two engines and is sitting on my shelf ready for another (BB Ford).
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    gn7
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    Quote Originally Posted by steelcomp View Post
    It's been in two engines and is sitting on my shelf ready for another (BB Ford).
    And never saw the far side of 5 grand There is no doubt that alot of things factor in, spring pressure, harmonics, oil pump pressure, RPM, lift intensity, etc.



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    Are you running the galley plugs with the little holes that lube the chain?

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    Quote Originally Posted by jungledave View Post
    Are you running the galley plugs with the little holes that lube the chain?
    no dave plugs are solid,but with being a v-drive i think gets a good bath from oil running back up the pan into the drive. but i think im going to put them in before i button it back up.

    anyone the cam-correct drive systems ???

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    We haven't used a chain in some time now. Gears and belts give you so much the advantage timing the cam during the build and wear is so much less a factor that we have chosen to stick with them.
    The best things in life aren't things!

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    cant afford the belt deal, i wish and all i here is bad things about gear drives,ie. harmonics and pics of burnt idler bearings so ill pass on that.may have to sell a guitar to pay for a belt setup. naaa.

    the cloyes quick adjust is cool in the way you can degree cam in so im going to put a new chain in with (gn7 chain lube tech) thanks and i put new oil galley plugs w/oil hole this time..thanks jungledave

    steelcomp im going to recheck all my pushrod lengths over thanks i set it up using a jesel pushrod tool and also used the line across the valve stem. i think i missed something to have a chain stretch so much. i run k-motion springs k1000h 265/825 lb springs

    Also thanks chris straub for getting back with me so fast about the rollmaster chain. called him and he fixed me right up. very nice guy

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    Quote Originally Posted by flat601 View Post
    no dave plugs are solid,but with being a v-drive i think gets a good bath from oil running back up the pan into the drive. but i think im going to put them in before i button it back up.

    anyone the cam-correct drive systems ???
    Off the subject but do you ever make it down to tablerock or bull shoals?

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    no, im not well liked at army corp lakes, my brother lives at tablerock but i dont pull down there. army corp lakes have there own set of rules regarding speed and noise. i used to go to mark twain lake but water patrol would just point towards the in ramp last few times i was there. took my hydro to mark twain lake only once you would of thought i was in alices resturant song, ya know three part hamony and littering
    used to go to clearwater a long time ago, i love lake of the ozarks family has lots of boats and homes on the lake.

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    Quote Originally Posted by steelcomp View Post
    I would guess that there a number of things that contribute to timing chain stretch, like bad valve train harmonics for one. It makes sense to me that if everything is running smoothly, even with a big roller, the timing chain will see less stress and last longer. Just another reason to be on top of valve train geometry.
    Funny you should mention motorcycle chain lube. That's all I've ever used on timing chains and for whatever reason, I've never had one stretch excessively. One of the best (and least expensive) chain/gear sets I've ever had was from PAW. It's been in two engines and is sitting on my shelf ready for another (BB Ford).

    hey steel looked up what springs i put on these smogger heads k1000h k-motions, 265/825 1.625 will recheck pushrods and geometry and may need to change springs later, i have a set of 240/620 1.625 pbms also i have 1.8 and a set of 1.7 rockers for the motor any thoughts there???
    thanks for the input guys

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    Quote Originally Posted by flat601 View Post
    cant afford the belt deal, i wish and all i here is bad things about gear drives,ie. harmonics and pics of burnt idler bearings so ill pass on that.may have to sell a guitar to pay for a belt setup. naaa.

    the cloyes quick adjust is cool in the way you can degree cam in so im going to put a new chain in with (gn7 chain lube tech) thanks and i put new oil galley plugs w/oil hole this time..thanks jungledave

    steelcomp im going to recheck all my pushrod lengths over thanks i set it up using a jesel pushrod tool and also used the line across the valve stem. i think i missed something to have a chain stretch so much. i run k-motion springs k1000h 265/825 lb springs

    Also thanks chris straub for getting back with me so fast about the rollmaster chain. called him and he fixed me right up. very nice guy
    Flat,
    Your welcome, chain will ship today to you. I forgot to ask if you got those flow numbers on the heads yet. Be more then happy to look at them and see if a cam would give some improvement.
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

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