Vendetta

Basics
Displacement: 350 cubic inches, 5733 cubic centimeters, 5.7 liters
Block Material: Iron
Main Bearings: 2-Bolt Centers and Ends
Stroke: 3.48"
Bore: 4.00"
Compression Ratio: 10.4:1
Factory Redline Rating: 5700 Rotations Per Minute

Bottomend
Piston Material: (10159437) Eutectic Aluminum/Silicon Alloy
Connecting Rod Material: (10108688) Powdered Metal
Crankshaft Material: (12556307) Cast Iron

Top End and Valvetrain
Cylinder Heads: (10168448) Cast Aluminum, 2 per cylinder, 212 CFM flow
Valve Diameter: (intake- 10241743, exhaust- 12550909) 1.94 intake, 1.50 exhaust
Valve Overlap: 41*
Valvesprings: (10206040) 85 lbs, seated
Camshaft Specs (12551705): 205/207 duration @ 50*, .447/.459" lift, 117 Lobe Seperation Angel
Rocker Arms: (10089648) 1.5:1 Stamped Steel
Timing Chain: (10128485) Powdered metal butt link

Intake and Fuel Delivery
Fuel Delivery: Electronic Fuel Injection, sequential port
Injector Size: (17124248) 3.0gps, 24lbs/hr
Throttle Body: 48 millimeter twin butterfly
Intake Manifold: (12552137) Aluminum

Factory Power Ratings
93-95 LT1 F-Body: 275bhp, 325lb-ft
96-97 LT1 F-Body: 285bhp, 325lb-ft
96-97 WS6/SS: 305bhp, 335lb-ft
93-97 Firehawks: 315bhp, 340lb-ft


I typed this for my own LT1 section in my forum, so I figured it'd help out here too. Hopefully it can do some good. I put the stock part numbers were applicable, as well. Good luck with your projects, fellas! Mods should probably make this a sticky...

Fastbird93

iTrader: (10)

Block material is iron.

Pistons are Hypereutetic

Connecting rod depended on year. Early/late were Powdered or Pink. I can't remember which was which though.

As for the fuel systems, 92-93 LT1's were batch fire with 22LB injectors.

Good write up.

Vendetta

Duh on block material... must have been a brain fart on my part

Vendetta

i guess no sticky... thought it could be helpful, oh well

steve-d

iTrader: (7)

Its very helpful. If known, could you post the know FWHP of the LT1 for the various years?

Regards
Steve

Fastbird93

iTrader: (10)

Easy one:

93-95 were rated at 275/325
96-97 were rated at 285/325
96-97 WS6 and SS were rated at 305/335
93-97 Firehawks were rated at 315/340

I'm positive 100% sure on the HP numbers, sketchy on the TQ numbers for all but the first two lines.

GoBabyvroommm

iTrader: (11)

O hell yea all that is very helpful. Just got my Formula and didn't know anything about the LT1 besides the fact its a 5.7/350.

Vendetta

Fastbird, I'm gonna add that to the list..

Fastbird93

iTrader: (10)

Glad I could be some assistance.

Damillio

Which one of those would an LT1 Ex-Cop Caprice fall under?.

Damillio

err a '95 caprice

Vendetta

A caprice LT1 should be pretty similar, the one big difference that I know of is iron heads instead of aluminum... not sure about anything else.

Fastbird93

iTrader: (10)

The Caprice/Impy SS cars came with the iron heads as the major difference. I want to say that they got a less agressive cam than the F-Body too, as they were only rated at like 240-260 HP.

bowtie9696

Conrods were forged until mid year 95, when they changed to the powdered metal crap. But I guess that's how the General justified the cost of the vented opti-spark units.

oOoLy

How about the LT4 Basic Specifications ??

02WS6Bird

iTrader: (2)

yeah wheres the LT4 specs