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As I understand it, DCNF's were the predecessor to IDF's, which were invented when they found that DCNF's had problems with fuel bowl slosh in some configurations. The IDF's superior float bowl design solved this problem. A friend had a set on a 69x88, though, and never had any problems on the slalom course (and he was a dedicated parking lot slalom enthusiast). He loved them. Berg sold the 40 and 42 DCNF and claimed to have done modifications so they would meter properly on a VW engine. As Stan and Mike said, they are easy to fit in a beetle engine compartment. Al

No, no, no......   Never on a Fiero.  Leave the EFI on there alone.  Going to carburetors makes it undrivable AND, if you can make it barely drivable, your fuel mileage will turn to crap (like, 15-ish).  Fiero V6's were a weird bunch. 

GM's Fiero EFI was bullet-proof and easy to work with.

I always thought the DCNF was a single carb set-up.  They always tended to have float bowl percolation problems in dual situations unless you used intake manifold insulator blocks.  They also flooded on hard cornering for some reason.

Some guys loved them.  I never did.

Last edited by Gordon Nichols

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