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Forum: Pontiac - Street 05-20-2020, 03:13 PM
Replies: 54
Views: 9,635
Posted By David Ray
Timing, vacuum advance and thermostat are...

Timing, vacuum advance and thermostat are correct. I wouldn't run distilled water, I'd run filtered tap water, and 50 percent green anti freeze. Reason: altered waters are all ineral starved, and...
Forum: Pontiac - Street 03-18-2020, 05:44 PM
Replies: 24
Views: 2,220
Posted By David Ray
I usually don't post here, because there are so...

I usually don't post here, because there are so many now it all's that don't have a clue, but, facts on points.

YES, Uni-Points are pure junk, for the 3rd reason, and, cooling, they are just...
Forum: Pontiac - Street 11-18-2019, 08:09 PM
Replies: 47
Views: 5,325
Posted By David Ray
ZZ4 and all Chevrolet crat engines come with a 22...

ZZ4 and all Chevrolet crat engines come with a 22 degree mechanical advance weights and center set, weights 41, center 375.

MOST of the aftermarket large HEI builders have started to use that...
Forum: Pontiac - Street 11-18-2019, 07:59 PM
Replies: 34
Views: 4,804
Posted By David Ray
I was a GM ignition system design engineer, none...

I was a GM ignition system design engineer, none of you were.

Now, in your most eloquent dissertations, outline just why a vacuum gauge shows vacuum below the throttle plates ehen they are closed,...
Forum: Pontiac - Street 11-18-2019, 04:58 PM
Replies: 34
Views: 4,804
Posted By David Ray
"Did you say vaccum advance was adding timing...

"Did you say vaccum advance was adding timing during WOT? I don't think that can happen under ported or manifold source? I always thought it zero's out advance under WOT?"

Well....that IS the main...
Forum: Pontiac - Street 11-17-2019, 05:38 PM
Replies: 47
Views: 5,325
Posted By David Ray
Although the points and large HEI distributors...

Although the points and large HEI distributors use the same basic premise for mechanical advance, there is a giant difference between them.

The points distributors use various center plates to...
Forum: Pontiac - Street 11-17-2019, 05:06 PM
Replies: 29
Views: 4,368
Posted By David Ray
The weights you want are 41, center plate is 375,...

The weights you want are 41, center plate is 375, straight out of the ZZ Chevy large HEI.

Unfortunately, the large HEI uses a center and weights package easily changed to reset curves, but, for...
Forum: THE LOBBY 11-06-2019, 08:47 PM
Replies: 33
Views: 1,868
Posted By David Ray
I get about 30 robocalls and spam calls per day,...

I get about 30 robocalls and spam calls per day, even on the weekends. Worse, I get upwards of 400 spam emails per DAY. I have filters galore on my phone, but, it isn't fun, nor controllable.

I...
Forum: Pontiac - Street 10-11-2019, 02:10 PM
Replies: 17
Views: 917
Posted By David Ray
OK, well, if you can't follow a simple...

OK, well, if you can't follow a simple explanatio0n of the way things actually work, so be it, but, stand aside and let those that want to fix it right, get to the info, and stop trying to make it...
Forum: Electrical Tech 10-10-2019, 07:20 PM
Replies: 34
Views: 7,333
Posted By David Ray
Hilarious, very entertaining. So, NO other...

Hilarious, very entertaining.

So, NO other carb creates ported vacuum above the throttle plates. That is just plain false.

It seems in your world, other carb manufacturers simply cannot drill...
Forum: Industry Stuff 10-10-2019, 07:00 PM
Replies: 30
Views: 25,522
Posted By David Ray
Yes, that is a really interesting version of an...

Yes, that is a really interesting version of an MSD E Core, isn't it.

And, for the price, it should also teach itself what each individual engine wants for a curve.

When it deficates itself,...
Forum: Pontiac - Street 10-10-2019, 06:43 PM
Replies: 30
Views: 2,566
Posted By David Ray
Yes, I fully outline in the vacuum advance stop...

Yes, I fully outline in the vacuum advance stop package, with install instructions and pictures that I have offered for the last 20 years for absolutely FREE for the asking.

I have outlined well...
Forum: Pontiac - Street 10-10-2019, 04:39 PM
Replies: 30
Views: 2,566
Posted By David Ray
OG68, a simple question, just WHERE did you...

OG68, a simple question, just WHERE did you install the Crane scroll degree stop plate on the advance, where Crane said to do it on the rear mounting screw? Or, directly opposed to the pin???
...
Forum: 64-65 GTO Tempest & LeMans TECH 10-10-2019, 04:02 PM
Replies: 7
Views: 1,123
Posted By David Ray
wow, LOTS of misinformation floating around. ...

wow, LOTS of misinformation floating around.

12SI IS the alternator to use, that is why the aftermarket people chose the 94 ampere Chevy Citation ones to pattern their stand alone models. Simple,...
Forum: Pontiac - Street 10-10-2019, 01:59 PM
Replies: 30
Views: 2,566
Posted By David Ray
OK, everybody go put their "Whirling Dervish"...

OK, everybody go put their "Whirling Dervish" costumes on. That'll help when everyone is spinning around in circles and gets nothing done.

There is a lot of good info in this topic, slogging, or,...
Forum: Electrical Tech 10-09-2019, 09:48 PM
Replies: 34
Views: 7,333
Posted By David Ray
Ported vacuum is NEVER sourced below the throttle...

Ported vacuum is NEVER sourced below the throttle blades, it is ALWAYS sourced at the smallest diameter of the bore venturii, that is why, as the air flow is high there when the throttle is full...
Forum: Electrical Tech 10-09-2019, 03:20 PM
Replies: 34
Views: 7,333
Posted By David Ray
WRONG. Since ported vacuum is taken further...

WRONG.

Since ported vacuum is taken further up the throttle bore, well within the smallest diameter of the venturi, vacuum is created there, to pull a vacuum advance diaphragm into adding timing...
Forum: 64-65 GTO Tempest & LeMans TECH 10-09-2019, 12:58 PM
Replies: 7
Views: 1,123
Posted By David Ray
M&H is a great wiring company, but, make...

M&H is a great wiring company, but, make absolutely sure you get EVERYTHING correct in the request. If you make a wire dimension that is too short, that IS the way they make it, no questions.
...
Forum: Electrical Tech 10-08-2019, 09:09 PM
Replies: 10
Views: 1,941
Posted By David Ray
At parts stores, Wells brand, VR715. At least,...

At parts stores, Wells brand, VR715. At least, that would be the one for the remote regulator alternators.
Forum: Electrical Tech 10-08-2019, 12:48 PM
Replies: 18
Views: 5,153
Posted By David Ray
Fusing, or, using a relay to power up an ignition...

Fusing, or, using a relay to power up an ignition system is not the way to go.

Direct connect to a full voltage source, hot in both start and run IS the way to do it.

If the IGN isn't hot...
Forum: Electrical Tech 10-08-2019, 12:40 PM
Replies: 2
Views: 1,494
Posted By David Ray
Yes, MSD boxes can exhibit those symptoms, but,...

Yes, MSD boxes can exhibit those symptoms, but, usually those are from a coil that is failing, especially a Blaster series MSD coil.

To correctly test the coil, it has to be at operating...
Forum: Electrical Tech 10-08-2019, 11:45 AM
Replies: 34
Views: 7,333
Posted By David Ray
"Please explain how a vacuum operated load...

"Please explain how a vacuum operated load compensator would ADD timing at acceleration? "

Welllllll, as we all know, full manifold vacuum REDUCES upon engine acceleration, because engine vacuum...
Forum: Electrical Tech 10-07-2019, 07:50 PM
Replies: 34
Views: 7,333
Posted By David Ray
The majority of the wire failures on large HEI...

The majority of the wire failures on large HEI magnetic pickups are fraying of, then intermittent connection to the two terminals inside the plastic connector that fits the two wires onto the end of...
Forum: Electrical Tech 10-07-2019, 12:54 PM
Replies: 34
Views: 7,333
Posted By David Ray
Pickup coil has single windings wire to stranded...

Pickup coil has single windings wire to stranded wire interface problems, and, second issue might be the actual strands are broken at the terminals in the plastic connector block that interacts into...
Forum: Pontiac - Street 10-06-2019, 10:34 PM
Replies: 27
Views: 5,353
Posted By David Ray
"36 degrees" isn't saying much. What is the...

"36 degrees" isn't saying much. What is the initial timing, and how many degrees does the vacuum advance have?
Showing results 1 to 25 of 35

 
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