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Re: How much timing chain slop allowed with roller cam
[Re: Hemi_Joel]
#2093930
06/18/16 01:53 PM
06/18/16 01:53 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I have a Rollmaster set (uninstalled). I'd heard good regarding it. made in Australia iirc
live every 24 hour block of time like it's your last day on earth
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Re: How much timing chain slop allowed with roller cam
[Re: Thumperdart]
#2094284
06/19/16 02:44 AM
06/19/16 02:44 AM
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Joined: Sep 2014
Posts: 4,457
Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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I know of 1000 hp cars w/chains.........I saw some used gear drives for sale so may grab one myself soon cos NOTHING sounds meaner than a gear drive and of course perfect timing doesn't hurt.......... If you can hear the gear drive it's junk If you heard my engine run you would not know it has a GD.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: How much timing chain slop allowed with roller cam
[Re: Hemi_Joel]
#2094327
06/19/16 10:42 AM
06/19/16 10:42 AM
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Joined: Oct 2005
Posts: 8,872
Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 8,872
Ontario, Canada
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I have a Rollmaster set (uninstalled). I'd heard good regarding it. made in Australia iirc This is top quality stuff!!
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Re: How much timing chain slop allowed with roller cam
[Re: madscientist]
#2094373
06/19/16 12:25 PM
06/19/16 12:25 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I know of 1000 hp cars w/chains.........I saw some used gear drives for sale so may grab one myself soon cos NOTHING sounds meaner than a gear drive and of course perfect timing doesn't hurt.......... If you can hear the gear drive it's junk If you heard my engine run you would not know it has a GD. Same here.. it seems the double idler gear drives are noisey ... you cant hear mine even if it had the best muffs on it... I have it apart right now and it looks like new... about 8-10 years old.... the KB unit is a single idler 
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Re: How much timing chain slop allowed with roller cam
[Re: Stanton]
#2094391
06/19/16 01:04 PM
06/19/16 01:04 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I don't think there is any adjustment in double rollers so they're probably made a tad loose so they'd still fit after a line hone. The one's I've seen also have very coarse gears compared to the single idler KB unit I had. True... the link bar between the 2 idlers is a fixed point and I'm sure they are a bit sloppy on the mesh..to set a KB you use a piece of paper as the gap
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Re: How much timing chain slop allowed with roller cam
[Re: Hemi_Joel]
#2095080
06/20/16 04:23 PM
06/20/16 04:23 PM
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Joined: Jan 2003
Posts: 7,490
Minnesota
Hemi_Joel
OP
master
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OP
master
Joined: Jan 2003
Posts: 7,490
Minnesota
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Is the Milodon gear drive as good and as quiet as the KB? It's cheaper.
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: How much timing chain slop allowed with roller cam
[Re: Hemi_Joel]
#2095106
06/20/16 05:19 PM
06/20/16 05:19 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Is the Milodon gear drive as good and as quiet as the KB? It's cheaper. If its a single idler that has a adjustment on it(and I think it is) then yes its quiet.... you want a single gear... any dual gear the link bar is pre set and can be sloppy(noise) EDIT The dual idlers sound like a blower
Last edited by MR_P_BODY; 06/20/16 05:24 PM.
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Re: How much timing chain slop allowed with roller cam
[Re: dogdays]
#2095634
06/21/16 01:50 PM
06/21/16 01:50 PM
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Joined: Jan 2003
Posts: 1,237
North Central, Indiana
Roughbird72
pro stock
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pro stock
Joined: Jan 2003
Posts: 1,237
North Central, Indiana
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Timing chains do not stretch, the pins wear. Eliminating chain wear during the first operation as the chain breaks in would probably extend the life.
R.
The cheaper timing sets have cast gears which also wear & add to chain slop.
72 Plymouth Roadrunner 11.08@123.25
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Re: How much timing chain slop allowed with roller cam
[Re: Roughbird72]
#2096296
06/22/16 04:19 PM
06/22/16 04:19 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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The Keith Black gear drive is not available for the early Hemi/LA.
The Milodon is a single gear, installs under the timing cover. Milodon has been making them for many engines for at least 40 years. It's not a two gear setup.
BTW, two gear setups can usually be bought noisy or quiet. Noisy ones have straight cut teeth. I believe after the first 50 miles the whine would be obnoxious.
I'm sure tooth wear is a factor on chains but not in the first few thousand miles. Also tooth wear tends to put a hook in the flank of the tooth, doesn't do much to the bottom or the opposite side of the tooth, which is where the slop would come from. The Rollmaster high dollar setup has billet gears, so tooth wear should be negligible as long as they picked the material wisely.
There is a third timing alternative, the timing belt that's available from HotHemiHeads.com but it's in the four digit price range.
R.
Last edited by dogdays; 06/22/16 05:50 PM.
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