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Old 04-01-2005   #1
Join Date: Dec 2004
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Exclamation better carb. for 128

is the fiat x1/9 1300 carb is better than the carb. for the x1/9 1500 to be put in fiat 128 1100 or there is better carb. from other fiat can be fitted and get more performance without massive fuel consumption
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Old 06-01-2005   #2
Join Date: Mar 2004
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Re: better carb. for 128

I take it that you have a manifold from a 128 coupe (two barrel weber carb std) this is the manifold to go for (I have the part number thats cast into it around somewhere) This is better than a manifold from say a 128 3p (as here in australia anyway) these have much smaller ports.

The same base pattern is used by all DMTR type carbs (what a 128 coupe has)

the carb from a 128 coupe is a 32dmtr and has 22/22 venturis.

From a lancia beta 2000 you can get a 34dmtr carb, which has 25/26 venturis

from a regata 100s you can get a 32/34dmtr, with 24/25 venturis

the difference may not sound like much, but work out the cross sectional area available with the larger venturis, and its a fair %age increase

If you modify the coupe manifold slightly, you can also fit a DCNF type carb, these have the two throttle blades opening together (simultaneous) as opposed to the progressive type DMTR carbs

Attached is a pic of a 36dcnf carb with a modified 128 manifold, this is for sale, email me if your interested.

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