Technical will a single 36 DCNF work on a 1500

[murcielagoGTR]

hi evey one i just joined last nite. what i need to know is alot of people use twin 36's but will a single do much or anything at all and what to expect.

 

[fiatfactory]

36 or 40DCNF will work very well as a single carb, but the issue is mounting it correctly.

The DCNF bolt pattern is different to the DMTR/DATR blt pattern that your X19 has as standard.

You can modify the existing manifold to accept the wider spacing, but this will actually orient the carburettor incorrectly for best use.... in that the float bowl (mostly the float pin) axis will be along the cars length, not across it as the designer intended.... causes lean out issues on hard turns one way, but not usually the other

32dmtr/datr has 22/22 venturis with 32mm butterflys, The 36 DCNF has 36mm butterflys, but the choke sizes are changeable, available from around 24mm up to around 32mm. (A 32mm hole will flow around twice as much air as a 22mm hole... Pi x (R x R) to work out the surface area to compare)

To do the job properly means major mods to your manifold, or the purchase of a suitable X19 single DCNF manifold.

A single DCNF will give about 90% of what twins will...when it's done properly.

The first picture is a modified manifold and a standard one to compare, the second picture is what you really need to do the job properly, or modify your existing manifold to orient the DCNF like this.

SteveC

 

[murcielagoGTR]

what about a regular weber intake manifold,does PBS has one;or vick's or someonee?

 

[murcielagoGTR]

does PBS or someone haave them and how much

 

[fiatfactory]

What do you mean by "regular"?

PBS sell twin manifolds, that are half way between 128 and X19 angles, so actually incorrect for either application, as the carb should be absolutely vertical for best results (according to Eduardo Weber the man who designed them)

Sprint and Alquati (both Italian companies now no longer in business) used to make these single manifolds for both 128 and X19, good luck finding one for an X19, they are few and far between, but come up occasionally on ebay. (128's are much more plentiful, but can be machined at extra expense)


SteveC

 

[murcielagoGTR]

sorry to ask 2x im still trying to figure how this thing works

 

[murcielagoGTR]

well i think i saw a "weber" intake manifold on e-bay for an x1/9, like the one in the pic you gave me

 

[murcielagoGTR]

could i have an adapter type plate made so it mounts to the stock manifold? or would flow be a problem?

 

[fiatfactory]

Anything is possible, but how well it will work and how even the mixture distribution will be is anyone's guess.....

Only manifold I can see on ebay at the moment is for twin dcoe's to what looks like a sohc (could be for a OHV like a 124 pushrod) , and its missing a chunk.....

http://cgi.ebay.com/Ansaugbruecke-A...598535196QQcategoryZ76044QQrdZ1QQcmdZViewItem

matt brannon at midwest X19 (ebay store) often has some interesting parts, try him, he's an X19 racer in the states... he had a couple of the sprint x19 manifolds a while back, so he will know what your after.

SteveC

 

[murcielagoGTR]

disregard the last entry, i see what you mean. thanks for the help though merry christmas

 

[murcielagoGTR]

real quick was 30$ i spent okay for the carb and K&N filter (found at a fleamarket)

 

[fiatfactory]

If the carb is complete and the throttle shaft isn't bent/ twisted, then it was easily worth the $30us you paid.... it was actually quite a good buy, probably worth around $50us quite easily... if it came with any sort of bell mouth or ram tubes, then even better, as these alone fetch around that money.

keep looking for a decent manifold to suit, proabably worth around $100 to $150us alone for an X19...

coupled with a standard Fiat twin out exhaust manifold (you guys in the states call these a "74 x" manifold) from a 128 coupe/x19 and freeflow system, a mild cam and reasonable compression.... around 100RWHP from a 1500 is achievable if your clever. (big jump from around the 60rwhp you now have)

SteveC