Building a 'stroker' 1756

[r1865]

Getting ready to tear down a 1756 and build it back as a stroker. If anyone has successfully accomplished this with a TC engine or knows anyone who has, I would appreciate it if you could please put me in touch with them. This will be my first TC engine mod I've ever attempted and just want to get it right the first time (I'm an old V8 guy). Probably not much difference but I don't want to take any chances. Thanks, Rich J.

[FiatMac]

PBS Engineering used to do a lot of Fiat Twin Cam work. They are pretty much out of the Fiat business now, but here is a link to a pamplet they put out on modifications to the engine which includes building a stroker 1756 using the 2 liter crank.
http://www.mirafiori.com/pbs/pbsdohc.html

[r1865]

VERY GOOD source Stan! Thanks so much for posting that. It answered most of my questions.

[Daniel]

PBS Engineering used to do a lot of Fiat Twin Cam work. They are pretty much out of the Fiat business now, but here is a link to a pamplet they put out on modifications to the engine which includes building a stroker 1756 using the 2 liter crank.

Clark at PBS told me years ago that this stroker 1800 with 2000 crank wouldnt last long the main bearing would give
out cause you need to remove to much mass from the counter weights to fit the crank in the 1800 block this is coming
from one of the owners of PBS !

[vandor]

Not to be a smartass, but Fiat did it successfully, it's the 1995cc TC engine.
Why would you want to stroke a 1800 with a 2000 crank, when Fiat already did it with the 1995cc engine?
The 1995cc has a much stronger center bearing journal, there must be a reason for it, so I wonder how long a stroked 1800 would last.

[Daniel]

Not to be a smartass, but Fiat did it successfully, it's the 1995cc TC engine.
Why would you want to stroke a 1800 with a 2000 crank, when Fiat already did it with the 1995cc engine?
The 1995cc has a much stronger center bearing journal, there must be a reason for it, so I wonder how long a stroked 1800 would last.

One thing that interested me about this mod years ago was using the 1800 rods they are alot shorter and can
handle more RPM then a 2000 Rods plus the engine would wieght less be shorter and closer to the ground
with more room for the hood . Clark told me it was a waste of time but back when they tried this it was to
get an edge on some class of racing that allowed lets say a 1800 block with stoke rods but they could get away
with a 2000 crank being installed . I don't remember all the details all i know is when it comes to auto racing
if there is a loop hole in the rules someone is always willing to exploit them and this is how PBS got into the
1800/ 2000 convertion kit .

[131]

Why would you want to stroke a 1800 with a 2000 crank, when Fiat already did it with the 1995cc engine?

Because the difference in rod/stroke ratio would make it a completely different engine to drive. The shorter rod would provide a greater angle on the crank providing more turning force. It would be an interesting experiment, although simply using standard rods and pistons would not suffice, the piston would sit 5mm proud of the block at TDC.