246 engine tuning

If you mean the Kugelfischer setup then it was mechanical, cam based and a nightmare to setup. It never worked as well as carburetors either.
The carburetor's venturis and over-fueling make the sound what it is.

 

No I didn't mean the Kugelfischer. That was Lancia.

Ferrari used Lucas which worked better than carbs for circuit racing and still does. A BDA or BDG engine on Lucas injection is always 30 bhp up on the carb setup. Hundreds of historic racers are still using them, and they're simple to maintain & set up.
Also, have you ever heard a Dino F2 injection engine? It's amazing, spine-tingling.
I really don't think that the turbulence of the venturis is audible, (and overfueling??????)
Actually I just remembered I've a got a nice injection engine ready to test in the car in about 4 weeks, see below. When it was on the dyno a couple of months ago people were flocking from all around asking what the hell that noise was. I promise you if it doesn't sound good in the car I'll own up and concede the point....
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I have some interesting pictures in my archive and maybe that is good base to discuss about.
First one is this, sorry for poor quality
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I think this picture shows a Dino engine on a test bench where Ferrari made some trials with in the 60´s.
I have nevers een those long trumpets on a Dino race car and they would give probably package problems.

 

No this picture was taken in your country. This is a custom setup with injectors in the trumpets.

 

OK, so nothing really special.
What about this engine?
The datails looks revolutionary to me if you see WHERE the intake manifold goes..
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wow! that must flow very well. looks like a large amount of machining was required to get that right as well. For what application was this done and what did it yield in the end?

 

I don´t have more informations about it.
I´m sure the picture was taken in workshop in Italy.
On the valve cover it is written "Dino 206" as the real Dino 206 S or SP´s.
I think even the location of the sparks had to change to make space for the new dirct intake channel.
And the distributor location is also interesting..

 

It looks like a non-factory modified engine to me, although the slide throttles themselves look correct. The works engines had twin inlet ports per cylinder which then siamesed in the manifold before the throttles. Also looks like it's wet sump and all the racing engines were dry sump.

I think the inlet between the cams engines were mainly produced in 1967 and with 3 valves/cylinder. The 1967 166 F2 was quoted at 200bhp/10,000 rpm which then went up to 225bhp/10,600 for the 4 valve (injection in the vee rather than between the cams). Does anyone know what power the 3 valve 206S was quoted at? The earlier 2 valve carb engines were 205bhp/8800, and Scarfiotti's hillclimb 2 valve injected 206S at 220 or 235bhp

 

I just came upon this old thread. Any updates? I love the discussion!

Freeman