CARBS

fiat218 · Post by **fiat218** » Thu Apr 12, 2012 7:59 am

i don't have them on a fiat at this time, this is just a picture of one of them,

124JOE · Post by **124JOE** » Thu Apr 12, 2012 9:00 am

RRoller123 · Post by **RRoller123** » Thu Apr 12, 2012 1:14 pm

Wickhud pissah!

sptcoupe · Post by **sptcoupe** » Thu Apr 12, 2012 3:11 pm

I think I would put them on my coffee table for all to see!

fiat218 · Post by **fiat218** » Thu Apr 12, 2012 3:39 pm

i may just do that lol

124JOE · Post by **124JOE** » Thu Apr 12, 2012 11:45 pm

at least they would stay clean on your table

boogiedude · Post by **boogiedude** » Fri Apr 13, 2012 12:29 am

That's a DCNF, not an IDF, just so you know

fiat218 · Post by **fiat218** » Fri Apr 13, 2012 6:55 am

actually i notice that last nite, i was told there where idfs. i do hope they are still ok of a carb, or what. when i got them i just put them away and they stayed in the box, i just happen to look at the carb last nite and read it on there, KNOW WHAT YOUR BUYING I GUESS LOL

WELL are they still a good carb? i did read the idf's are better

http://www.ebay.com/itm/Weber-40-DCNF-3 ... 519ec93a20

can some one verify if this will fit the carbs i have, says it the same but being i had no clue on what the heck i bough ,i best need to have some one verify it, i want to get a set of cleaners like this and the top cage will be gold plated too

sptcoupe · Post by **sptcoupe** » Fri Apr 13, 2012 11:27 am

DCNFs work best on tranversley mounted motors (Think X/19, Lancia Zagatos, etc). The arrangement of the fuel pick up in the float bowl in a DCNF will cause fuel starvation in a moderate corner lateral g load, as the fuel pick up will become uncovered momentarily. This will cause a brief "stumble", which can be a bit hairy in the middle of the turn.

They will work fine on a 124 TC mounted longitudinally, other than the fuel starvation issue. I have run them on several motors (before I figured out why it would stumble in corners), and just learned to adapt my driving to limit the lateral g's in corners, or anticipate the stumble. I never did dyno a set of DCNFs against a set of IDFs, but I suspect the power output is nearly identical with both, and it certainly will be unnoticeable to the guy in the diver's seat.

The throttle linkage is a bit different, but not hard to solve. The jetting will be slightly different as the emulsion tubes work differently in a DCNF, but you will still need to do all the other things you need to do to really enjoy your twin carbs and get the most from them.

Of course, mine were gold plated.

fiat218 · Post by **fiat218** » Fri Apr 13, 2012 11:55 am

well that kinda sucks now, starvation , i have all the linkage and stuff for it, now i wished i knew what i was buying

live and learn

sptcoupe · Post by **sptcoupe** » Fri Apr 13, 2012 5:56 pm

THe stumble will only be be under specific and limited conditions. I wouldn't worry about it unless you spend a lot of time at the edge in corners. JUst enjoy them - I did.

fiat218 · Post by **fiat218** » Fri Apr 13, 2012 6:16 pm

my mechanic said he can fix that, so it all good

ljayr · Post by **ljayr** » Wed Apr 25, 2012 12:00 pm

That carb looks great!
The easiest way to stop fuel starvation is to regulate fuel pressure after the carb.

This enables the float bowl to stay full around corners and under WOT.

fiat218 · Post by **fiat218** » Wed Apr 25, 2012 4:15 pm

thanks, i send in my valve covers to get gold too,.
thanks for the info

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