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Author Topic: DRLA diaphragm plate size  (Read 471 times)
pupjoint
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« on: April 26, 2019, 06:59:39 am »

Looking to order some diaphragms for my DRLAs, I notice there are 2 types, 19mm and 22mm plates.

my old ones are 22mm and they are a bit hardened.

whats the difference between the 2 types? Does the size of the plates matter?
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GARRICK.CLARK
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« Reply #1 on: April 26, 2019, 17:12:33 pm »

There is early and late model DRLA'S. I would just order the size you have now.
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j-dub
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Posts: 116



« Reply #2 on: April 27, 2019, 01:53:10 am »

When I first read this post I was a bit confused and did not know what you were talking about. I did a quick google and of course alfa's ebay add came up and I read what he was offering. This sent me to the garage to have a look at what I have and can tell you I have a mix of 16mm and 22mm center plate diaphragms and I don't think you will notice a difference between any of them. The plate size does not effect fitment, I would think in a lab environment it may effect pump shot volume a little bit.


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pupjoint
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« Reply #3 on: April 27, 2019, 09:52:23 am »

thanks I just got some ordered. found out I did not have any diaphragm springs inside the carbs and I have driven them about 3200 miles like that. I took the carbs out for cleaning/maintainence and changing the plugs out.
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j-dub
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« Reply #4 on: April 27, 2019, 18:44:51 pm »

No spring, that is tricky. Hopefully the springs and new diaphragms will get you all fixed up.

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pupjoint
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« Reply #5 on: April 28, 2019, 07:03:24 am »

No spring, that is tricky. Hopefully the springs and new diaphragms will get you all fixed up.



yea I got a shocked myself. surprisingly it ran good all the 40 months with 3 long trips out of town.
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