bmfIROC-Z

iTrader: (1)

title pretty much somes it up im just wondering if there is any hp/tq differences between the f body lt1's and the b/d body lt1's?thanks in advance,joe

Air_Adam

Heads (Iron VS aluminum) and compression ratio (10.5 aluminum, 9.5 iron head), camshaft profile, possibly exhaust manifolds. The rest is all about the same. The iron head motors were around 250hp, the aluminum head motors 275-285hp. Torque between 320-345ft-lbs.

rdog30

There were a few different versions of the LT1. All feature a cast iron block, with aluminum heads in the Y and F bodies, and cast iron heads in the B and D bodies. Corvette blocks had four-bolt mains, while most other blocks were two-bolt mains.

The 92-93 LT1s used speed density fuel management, batch-fire fuel injection and a dedicated engine control module (ECM). In 94 the LT1 switched to a mass airflow sensor and sequential port injection. A new, more capable computer controlled the transmission as well as the engine and got a new name: powertrain control module (PCM). Where the ECM held its calibration information in a replaceable "chip", the PCM was reprogrammable through the diagnostic port.

The early Opti-spark distributor had durability problems and a revised version was introduced on the 1994 B-Bodies and in 1995 on the Y and F-Bodies. 1996 saw major revisions for OBD-II - a second catalytic converter on the F-body cars (which was standard since 1995 in California), rear oxygen sensors to monitor catalyst efficiency and a crank position sensor for misfire detection. Some OBD-II features had been added to the Corvette starting in 1994 for testing purposes. The 1997 model year Camaro and Firebird were the last year for this engine in a GM production car.

The 1992 LT1 in the Y-body was factory rated at 300 hp and 330 lb·ft. 96 LT1 Y-bodies were rated at 300 hp and 340 lb·ft. The 93-95 F-bodies were rated at 275 hp and 325 ft·lbf, while the 96-97 cars were rated at 285 hp and 335 ft·lbf. The 96-97 WS6 and SS F-bodies were rated at 305 hp. The 94-96 B and D-body version was rated at 260 hp and 330 ft·lbf.

JDud

Some other subtle differences are the water pumps and the crank shaft hub. The water pumps have different ports/angles between the body styles and the crank hub is longer on the b-body (the accessories sit a little further out from the engine).
Here's a link to Shoebox's site showing some differences in the water pumps:
http://www.shbox.com/1/lt1_water_pumps.jpg
I have pictures on the computer at home showing the crank hub differences but not with me here (at work)...

87tpi350,6spd

iTrader: (12)

And if you get one from a b body make sure it is a 5.7L because there is a identical looking engine with smaller guts.