There are several horsepower options for 366 cubic inch General Motors engine. The largest General Motors horsepower option was 420 horsepower.
The GM 366 motor has a horse power of 300 at 4,400 RPM. The 366 engine is an?æeight cylinder with 6-liter engine.?æ
260
111bhp
290hp.
260
It has 275 hp.
approx 256
It is advertised that the ls1 trans am gets 305 horsepower but it really gets 345 horsepower, GM didnt want the trans am competing with the corvette
The stock 400 cubic inch (CID) engine with the casting number 333817 typically produces around 330 to 350 horsepower, depending on the specific configuration and tuning. This engine was often used in various GM vehicles during the 1970s. It's important to note that actual output can vary based on factors like carburetion and exhaust systems.
366 ci
Anywhere from 160 to 205 HP.
From 1976 to 1992, the GM 5.0L held 215 horsepower. from 1993 to 1998 when the 5.0L was cut from the market they were running 230 horsepower stock.