Looking for dizzy specs

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Nov 3, 2015 | 06:45 PM

#21

JohnZ

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From: Washington Michigan

Quote:

Originally Posted by Winch

I've been doing some research. I found this thread about the 1111069 distributor (365 hp)

http://www.ncrs.org/forums/archive/i.../t-106937.html

Which had these specs:

Gr. 2.372 Shaft (includes "football") #1964337
Gr. 2.389 Springs # 1883498, (23/32" free length)
Gr. 2.388 Weights # 1880902
GR. 2.410 Control # 1116236 (I believe it is stamped "MS", "236", and "16")
Gr. 2.362 Housing # 1961404
Gr. 2.381 Cam # 1935632 (my notes show that a NOS 1935632 cam is stamped "534" and "CCW")

Are these the weights I need? I'm not sure what GR.2.388 means. Is that 2.388 grams? If so can after market weights be bought like that assuming I can't find GM?

All of those parts were discontinued over 30 years ago. The "Gr." refers to the GM Parts "Group Number" used only for Service Parts. The only aftermarket weights I'm aware of are those included in the Moroso/Accel/ etc. advance kits, but they're not hardened.

Nov 3, 2015 | 07:25 PM

#22

Winch

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Quote:

Originally Posted by JohnZ

Sure - just remove the springs and the weights will lift right off their pivots.

Quote:

Originally Posted by Pilot Dan

I recently researched this on my own (I actually weighed the GM weights with holes and the GM ones without) and found they are the same weight .06 oz. Don't know why some had holes, but IIRC the "37" was the GM parts book replacement. Anyway, they weighed the same.

Pilot Dan

I did't know any of them had extra holes as designed. Do you know what horsepower the ones you weighed were for?

Nov 5, 2015 | 06:34 PM

#23

Winch

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Quote:

Originally Posted by Pilot Dan

Pilot Dan

Are you sure about .06 oz? The reason I ask is there are 28.3495 grams in an oz. So .06 x 28.3495 = 1.70097 grams. I just checked a post-1982 penny weighs 2.5 grams. I got to think those weights are more than a penny? I'll find out soon. I just ordered a jewelers scale accurate to .01 grams and I'm getting the Mr. Gasket weights and springs 927G. I'll weigh the weights in that kit and the GM weights in my dizzy now and report the results.

Anybody have the weight of the GM 1880902 weights?

Nov 5, 2015 | 07:46 PM

#24

Pilot Dan

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From: NJ Hockey beer league

Quote:

Originally Posted by Winch

I never weighed a penny, but all the different weights I do have all measured Six tenths of an ounce on the digital scale, though some were configured differently. One set was from a 365 HP distributor another a low HP and they weighed the same. The Mr. Gasket weights ALSO weigh the same but don't have the holes and are NOT hardened (as John mentioned) like the ones below.

Here is a photo of the GM weights as sold over the counter:

Last edited by Pilot Dan; Nov 5, 2015 at 07:47 PM.

Nov 5, 2015 | 07:58 PM

#25

Winch

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Quote:

Originally Posted by Pilot Dan

Here is a photo of the GM weights as sold over the counter:

six tenths would be .6 not .06 thus producing 17.0 grams. That sounds more reasonable. However finding out that all the weights are the same makes me wonder how this all works. Are they shaped differently? I guess I'll find out when I get the scale and Mr. Gasket weights.

Thanks

Jun 16, 2016 | 08:32 AM

#26

Winch

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I haven't posted on this thread for a while. I got my 350 running about as good as I'm going to get it I think. When I was researching this I found a website that had charts of all Chevy engines for each year. It had a lot of specs. I used to have it bookmarked but must have lost it. Anyone know of such a site?