[64speed]

I liked it better when the shaft didn’t move but I guess it is what it is. All this has given me a headache just reading it. The gear is on and that’s about all that matters to me at this point LOL

[242177P]

Originally Posted by dataway

Says "Pat. Pending DMC" on it.

[dataway]

Hehehe...it's a super rare Delorean Phase Adjuster

[grivera]

Aside from matching the original configuration when installing gear, is there any other way to determine what on side the dimple should be on?

[Shiny]

Originally Posted by HWYSTR455

… Shaft end play.....

Thanks for this post! I now get it. Excess clearance is needed to manage the variation in the STACK: oil pump, oil pump shaft, distributor shaft.

My original thought about thermal expansion was only about differential between distributor housing and distributor shaft. I now think expansion of the pump and oil shaft is another source of clearance loss.

Net: your advice to check clearance when INSTALLED is the key. Thanks again!

[dataway]

Originally Posted by grivera

Aside from matching the original configuration when installing gear, is there any other way to determine what on side the dimple should be on?

As others have stated, for whatever reason the dimple on every points distributor I have taken apart (all Pontiacs) it lines up with the rotor contact. I have no idea if that is the case with every one.

["QUICK-SILVER"]

Originally Posted by Kenth

I have found the distributor gear in a traditional Pontiac V8 is pushed against the wear shim at ALL times with engine running.

Wouldn't have been any need for the tanged (non spin) wear shim if the cam pulled down. Gear cut/angles don't change or stop the cam from lifting up on the distributor. Distributor would have to be on the opposite side of the block/cam for it to pull down.

Clay

[Kenth]

Originally Posted by "QUICK-SILVER"

Wouldn't have been any need for the tanged (non spin) wear shim if the cam pulled down. Gear cut/angles don't change or stop the cam from lifting up on the distributor. Distributor would have to be on the opposite side of the block/cam for it to pull down.

Clay

The distributor gear is pushed UP against the non tanged wear shim in a traditional Pontiac V8.

Kenth

[69 Limelight]

So, what about post #37, paragraph #7? Who's right?

[Sun Tuned]

See post 48.

[65sport]

That's not a phasing tool, that's a timing adjustment tool for use on a car without a vacuum advance. Here is an adjustable rotor for phasing adjustment: https://www.jegs.com/i/MSD/121/84211...IaAgmXEALw_wcB

They don't make this piece because it's a figment of the imagination.

[65sport]

Originally Posted by Sun Tuned

Well I don't really know what to say...
Has nothing to do with how straight through the hole is drilled. That's not the point. It's where in relation to the teeth the hole is..

I feel your pain. This is a hard point to drive home.

[dataway]

Originally Posted by 65sport

That's not a phasing tool, that's a timing adjustment tool for use on a car without a vacuum advance. Here is an adjustable rotor for phasing adjustment: https://www.jegs.com/i/MSD/121/84211...IaAgmXEALw_wcB

They don't make this piece because it's a figment of the imagination.

I'm amazed you thought I was serious.
I have a bridge for sale too.

[65sport]

Originally Posted by dataway

I'm amazed you thought I was serious.
I have a bridge for sale too.

Oh I knew you were trying to be funny, but that's what people do when they don't understand the subject matter and are too embarrassed to ask someone to explain it to them.

["QUICK-SILVER"]

Originally Posted by 69 Limelight

So, what about post #37, paragraph #7? Who's right?

In a "Pontiac", it would have to be a reverse rotation engine for the cam to pull down on the distributor gear.

I've tuned and worked on a bunch of twin engine boats that had one engine that ran CW and the other ran CCW. Most of them were chevy or mopar powered.

I've personally never seen a reverse rotation Pontiac.

Clay

[65sport]

Originally Posted by "QUICK-SILVER"

In a "Pontiac", it would have to be a reverse rotation engine for the cam to pull down on the distributor gear.

I've tuned and worked on a bunch of twin engine boats that had one engine that ran CW and the other ran CCW. Most of them were chevy or mopar powered.

I've personally never seen a reverse rotation Pontiac.

Clay

You should get out more. " Like all PONTIAC engines since 1955, the firing order sets is: 1-8-4-3-6-5-7-2, all by turning it counterclockwise".
http://pontiacformula.free.fr/en/allumage.php
"Pontiac’s 287 block featured five 2.5-inch-diameter main journals that support a forged-steel crankshaft. The left-hand cylinder bank was offset rearward. This allowed the distributor to be mounted on the right side of the block, exposing its driven gear to upward thrust, eliminating the need for a machined thrust surface within the block". https://www.pontiacdiy.com/pontiac-v...ory-1955-1981/

["QUICK-SILVER"]

Originally Posted by 65sport

You should get out more. " Like all PONTIAC engines since 1955, the firing order sets is: 1-8-4-3-6-5-7-2, all by turning it counterclockwise".
http://pontiacformula.free.fr/en/allumage.php
"Pontiac’s 287 block featured five 2.5-inch-diameter main journals that support a forged-steel crankshaft. The left-hand cylinder bank was offset rearward. This allowed the distributor to be mounted on the right side of the block, exposing its driven gear to upward thrust, eliminating the need for a machined thrust surface within the block". https://www.pontiacdiy.com/pontiac-v...ory-1955-1981/

No idea what any of your post has to do with reverse rotation engines.

Does appear that Mickey Thompson may have built at least a couple for one of his early land speed record cars. Four blown 389's, two running regular rotation and two reverse.

Still ain't seen one myself
Clay

[dataway]

Originally Posted by 65sport

Oh I knew you were trying to be funny, but that's what people do when they don't understand the subject matter and are too embarrassed to ask someone to explain it to them.

Settle down, I'm sure everyone here knew exactly what the device was without you "explaining" it.
You're getting off to a wonderful start. I look forward to your insightful contributions to our store of knowledge.

[HWYSTR455]

Dang. Guess dyslexia kicked in again!

.

[STEELCITYFIREBIRD]

Originally Posted by Kenth

I have found the distributor gear in a traditional Pontiac V8 is pushed against the wear shim at ALL times with engine running. Deceleration is NOT an issue that changes that.

I agree, had the same thought when I read the post.