differances in LT1s?
 

93s are speed density
94-97 are MAF
95-97 have the vented opti
96&97 are obd2
Vettes got the 4 bolt mains-all of them, or just the LT4s?

what are any other differances in them? im going to buy one soon and want to know what to look for.
my plans for the car are 383 or 396, possible force induction if its in the budget, LTCC so im not too worried about the vented/non-vented opti.
what are differances in the computers?
thanks

Block and Basics
Displacement: 350 cubic inches, 5733 cubic centimeters, 5.7 liters
Block Material: Cast Iron
Main Bearings: 2-Bolt Centers and Ends (The Corvette LT1/LT4 had 4-bolt mains)
Stroke: 3.48"
Bore: 4.00"
Compression Ratio: 10.4:1
Combustion Chambers: 54 cubic centimeters
Factory Redline Rating: 5700 Rotations Per Minute

Bottom End
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 valves per cylinder/16 valves total, ~212 CFM flow (Impala SS and Caprice heads were made of cast iron*)
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 Angle
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, 22lbs/hr speed density (1992-1993), 24lbs/hr mass airflow (1994-1997)
Throttle Body: 48 millimeter twin butterfly
Intake Manifold: (12552137) Aluminum

Factory Power Ratings
92-96 LT1 Corvette: 300bhp, 330lb-ft
1996 LT4 Corvette: 330bhp, 340lb-ft
1992 LT5 Corvette: 375bhp, 370lb-ft
93-95 LT5 Corvette: 405bhp, 385lb-ft
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

Factory LTX Camshaft Specifications**:
1992 Y-body: 205/207 0.451/0.450 lift 117 LSA
1993-1995 Y-body, F-body: 202/207 0.450/0.460 lift 116 LSA
1994-1996 B-bodies (including L99 4.3L): 191/196 0.418/0.430 lift 111 LSA
1996 Y-body, 1996-1997 F-body: 200/207 0.447/0.459 lift 117 LSA
1996 Y-body, F-body LT4: 203/210 0.476/0.479 lift 115 LSA


* Cast iron heads are known to flow better, but are also more prone to heat-soak than aluminum heads.




i copied and pasted that out of the newbie section

3 different ones. 93, 94-95, and 96-97.

93s had many different parts from the 94-97. Opti, timing chain cover, cam, intake, fuel rails, injectors, computer, TB, headers, trans, gauge cluster, axles/ rear brakes rotors, brakes.

stay with the 95 setup its obd1 but vented opti if its a project swap, if your buying a car go 96+, obd2 is easy'er for emissions to pass

or for us...95 and older...no emmissions.... :burn:

and remember...i'll gladly trade you my car for yours...

ok, ill do a straight up trade, oh, wait, yours is an auto, nevermind

Just a couple of tiny problems with your fact sheet, eg the 1992 Corvette LT1 is 300 hp 330lbft but in 1993 torque bumped up 10lbft to 340lbft

Not all of the rods are PM the switch was sometime around in 94 with PM the norm in 95.

...there's the change from batch fired injectors to sequential fuel injection around 1994, a better flowing aluminum LT1 head sometime late in production (96/97) but for some reason the HP/TQ ratings stayed the same from 93-96 in the Y-body LT1s (the late heads are not what you want if you plan on having them ported....neither LE or AI will use them as cores for the higher performance packages)

i know this is a dumb question but what do u mean by no emission??

speeddensity.org has a sticky that describes the 4th gen differences in detail.

i'll even give you your 6 speed back... :usa: i got a trans lined up :devil:

I like not having a MAF, but I hate not being able to tune my car as easily as 94+ :(

I'd agree 95 for all the benefits and little, to no, drawbacks. Going LTCC, you'll already have the crank trigger too.

for those that mentioned emissions, its not a problem. 95 and older are not required anymore and 96&97s are easy to get to pass with tuning.

different input shaft buddy:buttkick:

That is if you live in Illinois. In the state I live, my 95 is due to be checked this year.

didnt you say one of your friends wanted to trade auto for manual?

emissions out the tail are 20 years back here in TX obd2 well so long as the ecm says its ok but only in an obd2 car anything within 20 it up the tail

yea but hes going to charge me $6k. oh wait, that gives me a brilliant idea!!!!
ill give you my car, you give me your car+$6k and we have a deal :engarde:

you were telling me that someone had a manual and wanted to trade just the trans for an automatic

lol, i know. just to make the deal fair and a little more even on my half is where the $6k came into play