34 DMSA on 1800?

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indyware124
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34 DMSA on 1800?

Post by indyware124 » Sun May 13, 2018 3:52 pm

I have a 1978 1800 with a 32 ADF carb now. Is a 34 DMSA a decent upgrade? Will it be easy to swap?
1978 Fiat 124 Sport Spider
Fishers, IN (Indianapolis)
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friedman
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Re: 34 DMSA on 1800?

Post by friedman » Sun May 13, 2018 4:06 pm

Yes, and yes. Just be aware the DMSA is a mechanical choke so you will have to get a choke cable and block off the water choke lines from the ADF.
Carl in Virginia
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86 Bertone
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indyware124
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Re: 34 DMSA on 1800?

Post by indyware124 » Sun May 13, 2018 4:17 pm

My car already has a manual choke cable, is that what I use? Well, it says throttle on it. So, I guess that's different.
1978 Fiat 124 Sport Spider
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bartigue
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Re: 34 DMSA on 1800?

Post by bartigue » Sun May 13, 2018 5:51 pm

A 78 would have neither a choke nor a throttle pull. Your throttle is retrofitted from another, earlier, model year. You can use it as your choke. You shouldn't ever use a throttle pull, they were outlawed because people would use them as a cruise control. Since they don't release upon braking, they're dangerous if misused.

34DMS is a great carb
-----------------------------------------------------------
Brad Artigue
1982 Spider 2000
I've restored, worked on, sold, bartered, and bled for:
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indyware124
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Re: 34 DMSA on 1800?

Post by indyware124 » Sun May 13, 2018 6:04 pm

Great, I'll try to switch it over to a choke cable. I never use it anyway.
1978 Fiat 124 Sport Spider
Fishers, IN (Indianapolis)
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cgranju
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Re: 34 DMSA on 1800?

Post by cgranju » Sun May 13, 2018 9:35 pm

34 DMSA is great, I think. I believe it has a shallower base than the one you will be replacing so a thicker spacer, shorter studs, etc would likely be in order (no big deal).

(EDIT) I should have added, this was the stock carburetor for the 1974 model which also was an 1800.
Chris Granju
sunny East TN
owner of a number of Fiats built prior to 1986
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