This induction was designed for the Opel racing team by the engineers at Opel When they went to EFI a few years later, rather than re-invent the wheel (or exhaust manifold, in this case) they simply used the manifold they already had laying around. Just one example of how factory sponsored racing benifits the company.GTJIM said:It has just occured to me that this is probably the setup that gave the "Sprint" exhaust manifold its name originally as it would need an exhaust manifold without the heat stove.
So it uses a seperate choke for each cylinder!
IMS, DCNF carbs have slightly larger footprint than our typical 38DGAS or 40DFA replacement carbs, BTW the ONLY ones usable with this manifold without modifications to it, for reason already mentioned (progressive vs. synchronous throttles).oldopelguy said:Those carbs are a real pig to get anything for, the "O" in DFO is for Opel and so nothing else used them.
I have the intake manifold for sale, though, if anyone wants to try to adapt a pair of DCNF or similar carbs to it.
Brings to mind some deliciously beautiful Ferrari front engined V-12 GTO sport coupes and roadsters of the '50s and '60s. Just imagine the look of SIX DCNFs in a row snuggled neatly in the valley between the heads of a narrow angle Ferrari V-12! AWESOME!oldopelguy said:The DCNF bolt spacing is a bit different than the DFO's but the bore spacing is pretty close. That means you will need an adapter of some sorts, but it should be pretty easy. DCNF's have a huge racing heritage as well, considering they are the weapon of choice for almost everything Italian that goes fast.
Those throttle bodies sure are yummy. What a cool induction system that would make.