I just bought 4 Webers 40DCNF from a Fchater. He said they were Webers 40DCNF-12 but i don't see the 12 #'s anywhere. The only #'s i see on the Carbs are 40DCNF 35, 40DCNF 36, 40DCNF 37, 40DCNF 38. Does that sound right or mean anything?? Image Unavailable, Please Login
The dash 12's are the later replacement carbs. What you have there are actually a bit better if they are in good shape. The 35 through 38's are the early carbs they used on the euro cars. The only physical difference as to how they operate are that the progression holes are slightly different, ie more for non emissions type or euro cars. But its also possible these have been molested vis a vis drilling the progression holes larger, or adding a hole or two. I have the original hole size saved somewhere if you want to check them.
Thanks Paul. The guy said they were New. I'm no expert, but they don't have any gas smell if that means anything.
Huh. Its actually listed in the GT4 manual. 0,80-1,40-1,30-1,60-0,80 mm's. Its crazy how you can read that book 40 times and still find new stuff.
Could they be NOS? I guess I was under the impression those hadnt been made in a long time and were NLA.
I was looking Chris's new carbs over today. They're either new, or have been very cleanly & thoroughly rebuilt. No signs of any kind of stains/oil/fuel marks on any of the bodies, bright golden hardware. Throats clean w/no sign of staining. Threads in fuel line attachment holes look new, never used. Numbers are thin but legible. Overall body castings have a fine satin finish... Chris, It's beginning to look like you may have gotten lucky & have a matched set of Euro carbs! Maybe you should go fishing for early Euro cams... Paul,
Dead give away that these are Ferrari specific DCNFs and not the more ubiquitous -12: yours have the 5 screw top. Operationally does not really matter, but interesting to realize you paid less than half what those carbs are worth to a restorer. As has come up here so many times - no matter what the book says, VERIFY that each carb's jetting is the same! Sounds silly, BUT.... Have fun!
Thanks Russ. I'll have to touch base with our local carb guy (Birdman) to show me how to check the jetting.
Hmmmmm. I bought a Haynes Weber manual, but its a "techbook", and obviously different. Oh well, whats another book to buy in the grand scheme of things.
Here is a picture of under side and the manifolds. The carbs have a #78 on the gold flaps. (i know, i'm a duh on the right term) Image Unavailable, Please Login Image Unavailable, Please Login
+1 I'm going after one myself! Can't read too many books! PS: 'gold flaps' = throttle plates or 'butterflies'. another very obvious sign that these are Ferrari specific is the angling of the idle adjustment screws.
Wow! those are fantastic! I have never seen a new complete set like that. Why did you buy them? You profile says you have a GTSi. Are you planning a project...?
Yes, a little project. I'm going to convert from CIS to Carbs. It's crazy, i know, but like Birdman says "CARBS BABY!!"
Most likely it's a part # or size indicator. Get one of the Haynes Weber manuals, you're going to need 1 since you've decided to live with carbs.
Part number. Things you will need to use with Webers: Braden/Haynes/Pierce Weber manual: $ Market 8mm wrench: $ 5.00 flat headed screwdriver: $5.00 needle nose pliers: $15.00 thin magnetic pick-up rod: (don't ask me how I know) $10.00 SK synchronometer: $ 60.00 The Force: $ priceless
Hey Chris, those are the ones I bought 2yrs ago and sold to what's his name that you bought from. they are NOS, they were in the Ferrari shrink wrap when I passed them on. hard to find too, complete with linkage. the manifolds are also the euro ones as they do not have air ports in the runner base as the US versions do. hope that helps. PM me or call if you need more info.
