Jump to content
  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

How can I put a 40 DCNF onto a 2002?


bbrilli1

Recommended Posts

Hi all. I could use a little sage advice. (Even parsley advice would be fine) I am going to put a Weber 40 DCNF carb onto my '71 2002. I run it in FP in regional SCCA races so this must be my choice. (Oh what I would give for a pair of side drafts.) I have a Tisa sport cam and 10:1 compression and the old faithful 32/36 just isn't keeping up with the dopey miatas. Especially when when the engine is turning over 6k rpm. I doubt it is a bolt on so does any one sell a kit or will I have to fab the whole thing? Anything in particular to watch out for? Anybody have an old carb or adapter they want to get rid of? Thanks for your help.

BB

Throw another screw down the carby.

Link to comment
Share on other sites

Robert Maples and I have both done this. Robert came up with the idea to use two 1/4" plates, one bolted to the carb, and one to the manifold.

It works Ok. I am making the same HP with the carb as I did with injection. I am still working on the correct jetting. The key is the emulsion tube. I will have mine on the dyno in a week or two. Hopefully I will have the jetting resolved durring that session. I will post results. G

Link to comment
Share on other sites

Thanks for the info G. I'd love to see what you find out on the dyno. I've never even held a dcnf in my hands so any jetting info would be great. Do you have yours mounted with the throttle control lever pointed toward the back so you can use a rod or did you switch to a cable throttle linkage?

Throw another screw down the carby.

Link to comment
Share on other sites

Good luck on the DCNF installation. These carbs were popular years ago for the air-cooled VW. As with any other old carb, watch out for worn out throttle shafts, stripped threads and incorrectly drilled (oversize) jets.

I'm not even sure replacement parts can be sourced for these models.

See weblink to exploded view I just found http://www.racetep.com/weber/40DCNF.pdf

Shoot - what's next? Someone trying to install a Holley "Bug Spray" on a 2002?

Jim Gerock

 

Riviera 69 2002 built 5/30/69 "Oscar"

Link to comment
Share on other sites

I am going to put a Weber 40 DCNF carb onto my '71 2002. I run it in FP in regional SCCA races so this must be my choice.

I have no answers (not yet, anyway), but do have a question: Is there documentation in the SCCA rule book / elsewhere that the 40 DCNF was raced 'back in the day' ? I've got a vintage '02 race car which I race in VARA and have considering this option, but want to make sure it's legal (with documentation) before I proceed. Anyone have more info??? Thanks!

Link to comment
Share on other sites

Jgerock, thanks for the link. Yep, it is a weird thing putting a Ferrari carb on a BMW but that is the SCCA way. Thanks for the input.

kbmb02, gracer is correct. This is a (relatively) recent move by SCCA to equalize the cars running limited prep engines. If you can run side drafts I would do that instead of all the fabrication. If you are dead set, or required, to run one carb maybe a 38/38 DG(whatever choke)S would give you an advantage over a 32/36.

gracer, thanks again for the info. Here is my email address. bbrilli1 at live dot com. If you could either post your info here or email it I'd really appreciate it.

http://www.turbosport.co.uk/showthread.php?t=109939

Here is an interesting thread about modifying 32/36 carbs. And no I have not tried any of these tricks because that would be illegal for competition. I do think having this thread here instead of the front page will prevent some horrible damage to innocent carbs.

Throw another screw down the carby.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • BMW Neue Klasse - a birth of a Sports Sedan

    BMW Neue Klasse - a birth of a Sports Sedan

    Unveiling of the Neue Klasse Unveiled in 1961, BMW 1500 sedan was a revolutionary concept at the outset of the '60s. No tail fins or chrome fountains. Instead, what you got was understated and elegant, in a modern sense, exciting to drive as nearly any sports car, and yet still comfortable for four.   The elegant little sedan was an instant sensation. In the 1500, BMW not only found the long-term solution to its dire business straits but, more importantly, created an entirely new
    History of the BMW 2002 and the 02 Series

    History of the BMW 2002 and the 02 Series

    In 1966, BMW was practically unknown in the US unless you were a touring motorcycle enthusiast or had seen an Isetta given away on a quiz show.  BMW’s sales in the US that year were just 1253 cars.  Then BMW 1600-2 came to America’s shores, tripling US sales to 4564 the following year, boosted by favorable articles in the Buff Books. Car and Driver called it “the best $2500 sedan anywhere.”  Road & Track’s road test was equally enthusiastic.  Then, BMW took a cue from American manufacturers,
    The BMW 2002 Production Run

    The BMW 2002 Production Run

    BMW 02 series are like the original Volkswagen Beetles in one way (besides both being German classic cars)—throughout their long production, they all essentially look alike—at least to the uninitiated:  small, boxy, rear-wheel drive, two-door sedan.  Aficionados know better.   Not only were there three other body styles—none, unfortunately, exported to the US—but there were some significant visual and mechanical changes over their eleven-year production run.   I’ve extracted t
  • Upcoming Events

  • Supporting Vendors

×
×
  • Create New...