tomnj
Old fogie stogie
Hey guys! It's been a while, but chiming in to say I am still into old Fiat's all these years. My latest acquisition from about a year ago is a 1968 850 Coupe. It came with it's original 817cc (disassembled), so I promptly found a later 903cc donor car to put in the big 903cc More upgrades to follow, but ran into 2 issues with the engine swap, looking for advice/direction on these:
1. FUEL/Carburetor: The later 903cc's 850's used a tank recirculation style fuel setup with the stock Carb. This means an extra tube going back to the tank... but the early Coupe's had a different fuel tank and did not have this return line, so I plugged it off at the carb. The car runs like this, but idle dies as soon as I take it off choke. Maybe this has nothing to do with the return line (could be just a carb issue), but just wondering how others handled this and whether they needed to change to a different Carburetor. If so, what is the best carb to buy and maybe upgrade power a bit?
2. Charging: When I installed the new motor, I realized the regulator is different (because the 903cc uses an Alternator). I ordered the correct regulator, but having trouble with the 4 wires and where they go. Where can I find a good wiring diagram online? The manual I have does not have a good diagram.
Picture of the engine and Coupe. The other 2 850's are (were) mine also.
Tom in NJ
1. FUEL/Carburetor: The later 903cc's 850's used a tank recirculation style fuel setup with the stock Carb. This means an extra tube going back to the tank... but the early Coupe's had a different fuel tank and did not have this return line, so I plugged it off at the carb. The car runs like this, but idle dies as soon as I take it off choke. Maybe this has nothing to do with the return line (could be just a carb issue), but just wondering how others handled this and whether they needed to change to a different Carburetor. If so, what is the best carb to buy and maybe upgrade power a bit?
2. Charging: When I installed the new motor, I realized the regulator is different (because the 903cc uses an Alternator). I ordered the correct regulator, but having trouble with the 4 wires and where they go. Where can I find a good wiring diagram online? The manual I have does not have a good diagram.
Picture of the engine and Coupe. The other 2 850's are (were) mine also.
Tom in NJ