It’s a Hellcat with an engine from a truck. By finding engine specs of the truck and figuring out its power to weight ratio and cross-referencing that to the weight of the hellcat you’ll get your +/- accurate specifications. There is a source out there that states from what truck the grill came from.
It’s an Fabrika Automobila Priboj 13, likely a FAP-1313TK or FAP-1314S due to the shorter radiator length compared to other models.
The engine is an FAMOS F-A* or a FAMOS FF-A*, made by FAMOS at it would give 1/3 the specifications compared to the Continental R975-C1, in comparison the FAMOS F-A will be 24% heavier and 72% weaker if is the F-A model or 68% weaker if is the FF-A model
It will be a hell of a slow vehicle in summary, having a mobility of a truck in a 17 tons vehicle using a engine of an 4 tons military truck. Take this with a bit gram of salt, finding information for this specific engine is hard as it wasn’t exactly documented in english sources.
*Additional notes
The engines value may vary depending on the model of the truck this engine was taken from: The FAP-1313TK was built with the FAMOS F-A (130hp) and the FAP-1314S was built with the FAMOS FF-A (145hp).
The M18 has like 6 HP/tonne more which is an absolutely massive difference worthy of at least one BR step above, and then you factor in the great reverse speed as well.
Objectively looking, it is absolutely a competitor to the VK3002, having better hull armor and vastly worse turret armor with some other differences here and there.
Thanks for the info. Given those percentages, we can now calculate the Yugo Hellcat’s power-to-weight ratio, which in turn allows us to estimate its speed and acceleration characteristics.
The Results:
Metric
Original Hellcat
Yugo Hellcat (145 hp)
Engine Power
400 hp
145 hp
Vehicle Weight
18.8 tons
18.94 tons
Power-to-Weight Ratio
21.3 hp/ton
7.66 hp/ton
Top Speed (on road)
~55–60 mph
~20–28 mph (estimated)
Estimated Acceleration (Road Conditions)
Speed
M18 Hellcat (original)
Yugo Hellcat (145 hp)
0–20 mph
~8 sec
~22 sec
0–30 mph
~13 sec
~36 sec
0–40 mph
~20 sec
~55 sec
Max Speed
~55–60 mph
~25–28 mph
Off-Road Summary Yugo Hellcat
Metric
Value
Effective Power (off-road)
~101.5 hp
Power-to-weight (off-road)
~5.36 hp/ton
Acceleration (0–20 mph)
~32 seconds
Max Speed (off-road)
~18–22 mph
While this configuration is plausible with the static, low-mobility characteristics of Yugo-style warfare, it’s essential to confirm whether this engine is indeed the one used in the tank.
The grille on the converted Hellcat has a FAP 13 badge. As far as I know only FAP 1313 (130 hp) had the FAP 13 badge on the front grille. FAP 1314 /1414 (145 hp) had theirs on the cab door under the window. FAP 1314 — Википедија