1975 124 spider carb

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1975 124 spider carb

Postby calebw on Sun Mar 23, 2008 2:32 am

I have been working on my fiat for a while now and its a not making me a very happy person due to several cancerous problems if i couldent weld it would already be a parts car but anyway thats off subject, Im asking about the carb i bought the car for a very good price (free) but it had already been worked on and the carb's fuel lines were unhooked and had no makings to indicate where they go so i need some help knowing what goes where
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Re: 1975 124 spider carb

Postby Danno on Sun Mar 23, 2008 8:42 am

A man of historic proportions, named Brad Artigue (pronouced R-teeg, or so he tells me), has compiled most of the information you need.

Check here:
http://www.artigue.com/fiat/

first get the pdf labeled "FIAT 124 Spider Engine Maintenance and Modification" to help determine exactly which carb you have. you probably have the stock carb (The 75 was a good year!- 32adfa), but you wouldn't be the first with something different.

Then scroll down and there is a list of weber carb diagrams. Pick the one you have. all else fails I have the 32adfa and I spent a looooong time looking at diagrams, etc trying to figure the stupid thing out, so I can probably help.
Dan Reinhardt
Owner of the world's most expensive Free Fiat (Friat - 1980 Carb'd)
I also own a 1976 2door 128 Sedan.
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Re: 1975 124 spider carb

Postby calebw on Sun Mar 23, 2008 11:55 am

Well i have some strange news the body on my fiat is from 1975 but the engine isnt. Im not sure what year it is but its a 2000cc with a 32 adha on it. Not sure if its a good thing or a bad thing but it is a bigger engine so i guess i'll be happy so long it runs well. One more question though will it run with just the inlet.
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Re: 1975 124 spider carb

Postby So Cal Mark on Sun Mar 23, 2008 1:00 pm

yes, it will work with just the inlet. One of the advantages of a return line is to reduce the chance of vapor lock. With a return line, fuel will constantly flow through the pump and lines and that prevents vapor lock.
Mark Allison
allisonsautomotive.com gear reduction starters for the 124, 131, X1/9, 850 Distributorless ignitions for 124, 131, X 1/9, Monza wheels
X1/9, 131, 124 Spider exhaust system, http://www.fiat500speed.com
starsmark@hotmail.com 909-981-3566
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Re: 1975 124 spider carb

Postby calebw on Sun Mar 23, 2008 3:07 pm

When i said inlet i meant that nothing else will be hooked up to the carb but the one main fuel supply mainly because i dont know where the other hoses go and most of the hoses arent there so the only way for me to really put it all together is to see a working one and copy it unless i can find a diagram with detail about where the hoses come from and where the go
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Re: 1975 124 spider carb

Postby So Cal Mark on Sun Mar 23, 2008 3:30 pm

so, you're asking about the vacuum hoses, not just the fuel hoses? To get the car running, you can cap all of the vacuum ports. Just realize that the large port on the manifold goes to the power brake booster so you won't have power assist if you drive the car. The small vacuum nipple under the accelerator pump diaphragm should be attached to the crankcase breather tube on the air cleaner. Without that one hooked up you may build excess crankcase pressure and create oil leaks
Mark Allison
allisonsautomotive.com gear reduction starters for the 124, 131, X1/9, 850 Distributorless ignitions for 124, 131, X 1/9, Monza wheels
X1/9, 131, 124 Spider exhaust system, http://www.fiat500speed.com
starsmark@hotmail.com 909-981-3566
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Re: 1975 124 spider carb

Postby calebw on Sun Mar 23, 2008 4:15 pm

Thank you for your help now im sure i can get it running but not drivable, my goal was too just get it running but if anyone knows where i can find a diagram about all the lines comming off and going into the carb that would be best because ive been having a horrible time restoring this car. I miss working on 5hp motors and simple american cars. But none of them look as good as the spider, with two exceptions the shelby cobra and old muscle cars. driving an original cobra was the best day of my life by the way.
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Re: 1975 124 spider carb

Postby ventura ace on Sun Mar 23, 2008 6:12 pm

Caleb W.,
I took pictures of all the stuff around the carburetor for a '76 spider before removing the engine. I think this may be the same as '75. E-mail me with your e-mail contact, and I'll send you pics. I labeled all the connections, also. Therefore, I could possibly provide you answers if you want to call and discuss.

Alvon Elrod
ventura_ace@juno.com
805-338-1767
Alvon Elrod; Ventura, CA
ventura_ace@juno.com
'70 124 spider, 1.8L modified
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Re: 1975 124 spider carb

Postby bradartigue on Sun Apr 06, 2008 9:09 pm

There are two fuel lines on the DS fender, the bigger one (typically under the master cylinder) is fuel INTO the pump, the smaller one (typically a 90 degree turn up towards the hood closer forward of the MC) is the fuel OUT of the carburetor. The larger port on the carb is fuel IN from the pump, smaller is fuel OUT. These are on the carburetor top.

On the base of the carburetor you'll find a triangle cast into the body. Above that is a small vacuum port, it is for the distributor vacuum that you will need if you have an electronic distributor. Hooked to the side of the carburetor and under the pneumatic secondary is a dashpot with a screw in the top and a large port on it. That's a vacuum line to the DS fender mounted fast idle assembly. I'd block it off. Buried into the side of the carburetor is a vacuum port that hooks to the charcoal canister; also can be safely blocked off.

Hope it helps.
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