Reverse threaded carb linkages

Congrats, what you have made is quite genius and a perfect replacement for Ferrari's mistake. Anyone can set perfect suction at idle among the three carbs, but to get the suction to remain perfectly even as the throttles open, that is the challenge. I have spent many hours toiling over a hot idling engine trying to achieve it, but to no avail, so have come up with a system that does what yours does, but not so elegantly as yours. I would post the pictures, but am a little embarrassed.

john

 

Hi - this looks like a great idea!

I will happily try them out and document the process on the rebuild thread of my 275GTB:

http://www.ferrarichat.com/forum/showthread.php?t=280041&page=43

as you can see it is very comprehensive and detailed restoration with a good number of hits and followers. We are about to start the documentation of the engine rebuild, which will include a detailed section on the carb's. We will be using the 6 carb set up.

Given that www.joemacari.com always has a number of vintage Ferrari under various stages of repair or restoration I am sure Joe will be interested in using the product - good commercial opportunity for you.

Please let me know. regards Mark

 

Hi Bill, don't laugh... a mini-lathe and hardware store stock in the hands of an amatuer...
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Thanks Bill, but I do want to say that perfectly unison suction throughout the range makes a huge difference in smoothness of acceleration. Your invention, in the right hands, can bring about marked improvement to an otherwise well set up engine.

How I came to create my system is I had this very slight vibration that would come on at about 1200 RPM and would last a brief while. I was convince that it was a dynamic balance issue. But all it was was uneven suction above idle and the way I found it was by that crazy setup you see in my last picture—with six synch meters. Then, once I found the problem, I realized correcting it was nearly impossible. So, as they say, necessity is the mother of invention, I came up with this “brassy” adjustment system. Now my car’s take-off is so smooth, it almost feels like I have two V12’s under the hood ; )

john

 

nice work both of you, Bill and John.

You can never have too many synchrometers . . . .

 

Hi Bill, many thanks look forward to trying them on the 6 carb set up, I will document everything on the 275gtb restoration thread. regards Mark

Mark McCracken
c/o Joe Macari Ferrari Service Centre
The Kimber Centre
54 Kimber Road
London.
SW18 4PP
UK

 

These are for the three-carb use.

john

 

An environmentally friendly upgrade to the mercury-filled glass sync tools of yesteryear. Nicely done, John.

 

Hi, we never did receive the set down the garage?
The engine builders are very keen to try them, given last year they rebuilt over 20 Colombo V12 engines, it may be a great place to have the service department market your product to the clients and owners of vintage Ferraris.

Let me know

regards
Mark

 

I used this linkage on my newly rebuilt Lusso motor. They made set up quick and simple.
It is worth it for the time savings.
Aloha,
Mark

here it is running on Paul Hasselgrens dyno:
[ame]http://www.youtube.com/watch?v=Pnay3gg761k[/ame]

 

Nice work Busted Belt Bill. Your system is awesome, actually thought out properly. The "Italian" way to make the pinch bolts loose enough to make slip on the shaft but tight enough to hold as you adjust makes me go insane. What is more insane is that I keep tuning these engines this way, standing over hot engines and breathing exhaust. Next time I have an application for your parts I'll call you!

 

Thanks. The kit comes with only one set of ends. Is it expected that we use our original ones?

john

 

Got it, thanks Bill.

Great product, if you're aiming for a razor sharp tune.

john