Dino engine balancing

No, originally all components were balanced separately...

 

The clutch disc is always in a different position in relation to the flywheel and cover (pressure plate) so it is not included in the balancing. For the most part, clutch covers are balanced well enough to be used, as is, without problem. The 206 engine is different depending on whether it is a Ferrari engine or a Fiat Dino engine. The Ferrari is internally balanced. The Fiat is externally balanced. That means that the crank needs to be balanced as a unit with the front pulley/damper and the flywheel.

Balancing a Ferrari flywheel and cover would require making some kind of special jig arrangement. The flywheel is driven by a rubber cushioned damper but it is centered and located by its own special shaft. The Fiat flywheel has an eccentric weight cast into it to complete the "externally balanced" crankshaft. It really needs to be spun as a unit with the crank.

 

I seriously question that the FIAT is different from the Ferrari engine. I know there are many myths out there that Ferrari people like to believe to keep believing the Ferrari is better but there are many published books that clearly state the engines were identical.

 

Hi Mike

I understand your being skeptical! It is especially understandable because there are so few Ferrari 206 engines out there. While all of the physical dimensions are the same: stroke, main journals, rod journals, the Fiat and Ferrari cranks are balanced differently. The quickest and easiest piece of evidence to see is that the front pulley/damper assembly on the Ferrari is concentric while the Fiat pulley/damper has a significant eccentric weight. The 246 Ferrari IS externally balanced. It has the eccentric weight on the pulley/damper and on the flywheel. The 246 uses a conventional steel flywheel, not the bonded rubber/aluminum damper unit that drives the 206 Ferrari flywheel.

 

True, they are pretty rare motors, I have one out in the garage sitting there doing nothing. I will take a look at the pulley/damper.

As to the carbs, I also have heard they were different and also heard they were the same, I can look at the jets on my motor since its out of the car, it came from a FIAT, that I no longer own.

 

Hi

It has been some time since I have had one of these engines apart. I have a mental picture of a void in the back of the flywheel that gave the effect of an offset weight on the other side of the flywheel. I also seem to remember a Fiat flywheel that simply had large drillings on one side.

I was able to dig up this old picture. It is a Fiat Dino flywheel (back). There are two large drillings on one side. I simply want to alert you to the fact that having a shop balance the flywheel and pressure plate as a distinct unit, without the crankshaft may cause disappointment.

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