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Old 07-14-2008, 06:39 AM
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MSD Dizzy

The literature with the MSD chevy pro-billet distributor shows that the block needs to be chamfered to run the dist with rubber o-rings. What is the point to that?

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Old 07-14-2008, 06:50 AM
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maintains oil pressure.
and directs oil to distributor shaft.
http://www.chevytalk.org/fusionbb/sh...hp?tid/192284/
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Old 07-14-2008, 07:00 AM
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You donīt have to use them ifīn you donīt want too.
I have an MSD which I hoped to install today, but one thing is bothering me,
the flag on the distributor gear.
I have 15 - 40 Castrol in mine and donīt fancy oil changes for installing distributors.

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Old 07-14-2008, 07:18 AM
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Just wondering what is the origin of this word dizzy for a distributor. I have never heard it before until reading it around this site and do not here it in the field. Seems to be some local HTBB term, it just sounds lame as a part id.

Can't you just here Austin Coil saying, "hay pass me the two dizzies and we can fire this thing" or is this one of those Hottroders terms, dumbing it down, like Hotrodders terms for dummies kind of thing.

Maybe a pole here..
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Old 07-14-2008, 07:34 AM
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Quote:
Originally Posted by pepi
Just wondering what is the origin of this word dizzy for a distributor.
I don't really know the origin of the term "Dizzy" for distributor. I always attributed it to being either an Aussie and/or Brit terminology. I don't recall having heard it before going on Bulletin Boards on the internet.
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Old 07-14-2008, 07:49 AM
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I actually picked it up here too....lol....too lazy to type distributor all of the time......I guess the question is why would you go out of your way to chamfer the distributor holes in the block just to run the o-rings and if the block was chamfered and you didnt use the o-rings what would happen and if there is any advantage to either?
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Old 07-14-2008, 07:54 AM
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Quote:
Originally Posted by malc
You donīt have to use them ifīn you donīt want too.
I have an MSD which I hoped to install today, but one thing is bothering me,
the flag on the distributor gear.
I have 15 - 40 Castrol in mine and donīt fancy oil changes for installing distributors.

I wonder - what is the healthy wear pattern on a distributor's gear supposed to look like?
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Old 07-14-2008, 09:30 AM
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The wear pattern should resemble the pattern on a differential ring & pinion, centered on the distributor gear & not eating in to the gear. If it's not centered you may need to shim it. I just apply plenty of assembly lube and start it up.
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Old 07-14-2008, 09:34 AM
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If your question is why is it necessary to chamfer the block, it's so you can get the distributor into the block with the o-rings in place. Without the chamfer, the o-rings get bound up and cut by the sharp edge of the block.
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Old 07-14-2008, 10:00 AM
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That makes sense. Now I guess the question is why o-rings?
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Old 07-14-2008, 11:00 AM
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Quote:
Originally Posted by SSedan64
The wear pattern should resemble the pattern on a differential ring & pinion, centered on the distributor gear & not eating in to the gear. If it's not centered you may need to shim it. I just apply plenty of assembly lube and start it up.

I've not ever seen the ring & pinion wear pattern, either, sorry! My distributor's gear wear is centered on the gear - and as far as eating the gear I guess that you mean taking metal away from the gear? Mine isn't doing that.
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Old 07-14-2008, 11:01 AM
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dizzy, noss, donk, bubble, hopper, zip, etc.
a lot of new buzz words created by the younger generation to sound cool.

Didn't you see the modern classic, Fast and Furious?
It will be (IS) their American Grafitti and Two Lane Blacktop.

Sort of like hot rod, rod, deuce, highboy, lead sled, etc.
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Old 07-14-2008, 11:39 AM
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Quote:
Originally Posted by Sixtyninemercury
I've not ever seen the ring & pinion wear pattern, either, sorry! My distributor's gear wear is centered on the gear - and as far as eating the gear I guess that you mean taking metal away from the gear? Mine isn't doing that.
This has some pictures of a ring&pinion install with wear pattern shown. On a distrbutor gear you really only set the depth unless you use a front thrust button or (OEMretainer plate)(roller cam) and the rear cam plug or a stop for backlash. Flat tappet lobes have a taper that keep pushing the cam rearward toward the gear.
http://www.richmondgear.com/ringandpinion.pdf
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Old 07-15-2008, 05:41 AM
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Done hi-jacking my thread?...lol.....repost.......That makes sense. Now I guess the question is why o-rings?
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Old 07-15-2008, 08:30 AM
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Quote:
Originally Posted by dawg
maintains oil pressure.
and directs oil to distributor shaft.
http://www.chevytalk.org/fusionbb/sh...hp?tid/192284/
You were answered post 2.
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