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Big block timing fluctuations with solid roller cam ?
#870425
12/03/10 06:28 PM
12/03/10 06:28 PM
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Joined: Jan 2006
Posts: 587
IL . usa
cjs69mope
OP
mopar
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OP
mopar
Joined: Jan 2006
Posts: 587
IL . usa
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Can somebody educate me on how by putting a collar at the bottom of the distributor shaft helps stop this?
I see two different types out there one is $6.00
and one is $80.00 .
I do think that my timing does walk a few degrees at idle but seams to smooth out if you hold the r.p.m.s up with the throttle.
Has anybody seen a difference by using the distributor collar and what type works best for the money ? Thanks Moparts .
1969 Dodge Charger
1969 Dodge Superbee
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Re: Big block timing fluctuations with solid roller cam ?
[Re: cjs69mope]
#870427
12/03/10 06:46 PM
12/03/10 06:46 PM
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Joined: Oct 2007
Posts: 3,903
Oregon
hooziewhatsit
master
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master
Joined: Oct 2007
Posts: 3,903
Oregon
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I think it helped on my 318; timing seemed more steady afterwards  The collar keeps the distributor gear from walking up towards the distributor. Since it's a gear, if it comes up, it rotates a little and changes the angle to the distributor, which changes the timing (slightly). The collar is attached to the distributor, which is bolted to the block, so it keeps the gear at its lowest point and prevents it from walking back up. I just used a Home Depot $5 1/2 collar.
If you ever find yourself in a fair fight, your tactics suck.
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Re: Big block timing fluctuations with solid roller cam ?
[Re: hooziewhatsit]
#870428
12/03/10 06:51 PM
12/03/10 06:51 PM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Use the cheap one, slide it on the end, snug the setscrew, set dist in to locate the collar further up the shaft, take it out & tighten/loctite it securely. reinstall the dist. If you timing chain is good your timing will be steady. EDIT Also peen the end of the shaft (on each side) to widen it so it fits tight in the intermediate shaft recess as there's also
play there that causes scatter
Last edited by RapidRobert; 12/03/10 06:57 PM.
live every 24 hour block of time like it's your last day on earth
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Re: Big block timing fluctuations with solid roller cam ?
[Re: Dcuda69]
#870429
12/03/10 06:52 PM
12/03/10 06:52 PM
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Joined: Jan 2006
Posts: 587
IL . usa
cjs69mope
OP
mopar
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OP
mopar
Joined: Jan 2006
Posts: 587
IL . usa
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OK but how does it work what does it fix ? is the cam moving or is the distributor moving side to side or what ? Some say that you need this. Not sure i want to spend the money though . web page
1969 Dodge Charger
1969 Dodge Superbee
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Re: Big block timing fluctuations with solid roller cam ?
[Re: cjs69mope]
#870430
12/03/10 07:59 PM
12/03/10 07:59 PM
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Joined: Jan 2003
Posts: 75,070
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,070
U.S.S.A.
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Quote:
OK but how does it work what does it fix ? is the cam moving or is the distributor moving side to side or what ? Some say that you need this.
Not sure i want to spend the money though . web page
Cam is moving and the gear is moving, what is happening is the gear is walking up and down and the collar stops this. Dvoraks is a fancy setup to do with the hardware store part , made in china , does.
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Re: Big block timing fluctuations with solid roller cam ?
[Re: Yancy Derringer]
#870432
12/04/10 02:01 AM
12/04/10 02:01 AM
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Joined: Jan 2006
Posts: 587
IL . usa
cjs69mope
OP
mopar
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OP
mopar
Joined: Jan 2006
Posts: 587
IL . usa
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I see the light ! thank you for clearing this up for me i am going to pay more close of attention to this in all my cars from now on it makes sense . i think the cars will run a little better too . Thanks again guys.
1969 Dodge Charger
1969 Dodge Superbee
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I just used a collar from the hardware store(1/2" I believe)Slid it on w/set screw just snug,put dist in to locate collar on shaft,pulled it out and loctited the setscrew. Been in like that for 3 yrs! 
I'll assume the op is running a thrust button? Collar's, rubber hose etc is a waste of time,no gains except the idle timing may be less jumpy.Dvoraks system is a better bet than the $1.oo hardware store method.