LT1 Run-Down
07-01-2009, 09:07 AM
#1
Staging Lane
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LT1 Run-Down I own a LT1 car, but has a 1992 LT1 from a C4. I understand theres a power difference, but not too sure what the difference is mechanically?
07-01-2009, 11:25 AM
#3
Main Bearings: 2-Bolt Centers and Ends (The Corvette LT1/LT4 had 4-bolt mains)
Injector Size: (17124248) 3.0gps, 22lbs/hr speed density (1992-1993), 24lbs/hr mass airflow (1994-1997)
Factory Power Ratings
92-96 LT1 Corvette: 300bhp, 330lb-ft
93-95 LT1 F-Body: 275bhp, 325lb-ft
96-97 LT1 F-Body: 285bhp, 325lb-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
1996 Y-body, 1996-1997 F-body: 200/207 0.447/0.459 lift 117 LSA
Front accessories are different as well.
But basically, it's the same thing...
07-01-2009, 12:47 PM
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If you have F-body intake and exhaust on it, you will be withing a few hp of what it was rated in an F-body. Only performance difference being the cam and thats not much of a difference at all.
07-01-2009, 01:02 PM
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I'm not sure, but the motor was rebuilt and pulled from a 1992 C4 and put in this car before I bought it. I'm assuming from top to bottom, its C4 LT1
The car has a MadZ PCM tune, EGR Delete, port matched gaskets and the cat was removed, AKA someone cut that bitch out and put a straight pipe into a "blowmaster" with huge tips that were made for a Z71.. I'm looking at putting a Dynomax Race Bullet 2.5" in/out where the cat was and dumping it. I hate those tips. Just an inexpensive quick fix.
In that sense, if my car is running right, then I should have a hair more power than my stock equivalent?
The car pulls harder (no doubt) than my buddies stock 1996 Z28, but I really didnt know the difference btw the two LT1's, so now I do.
The car has a MadZ PCM tune, EGR Delete, port matched gaskets and the cat was removed, AKA someone cut that bitch out and put a straight pipe into a "blowmaster" with huge tips that were made for a Z71.. I'm looking at putting a Dynomax Race Bullet 2.5" in/out where the cat was and dumping it. I hate those tips. Just an inexpensive quick fix.
In that sense, if my car is running right, then I should have a hair more power than my stock equivalent?
The car pulls harder (no doubt) than my buddies stock 1996 Z28, but I really didnt know the difference btw the two LT1's, so now I do.
Last edited by CrimsonLT1; 07-01-2009 at 01:09 PM.
07-01-2009, 01:49 PM
#7
I'm not sure, but the motor was rebuilt and pulled from a 1992 C4 and put in this car before I bought it. I'm assuming from top to bottom, its C4 LT1
The car has a MadZ PCM tune, EGR Delete, port matched gaskets and the cat was removed, AKA someone cut that bitch out and put a straight pipe into a "blowmaster" with huge tips that were made for a Z71.. I'm looking at putting a Dynomax Race Bullet 2.5" in/out where the cat was and dumping it. I hate those tips. Just an inexpensive quick fix.
In that sense, if my car is running right, then I should have a hair more power than my stock equivalent?
The car pulls harder (no doubt) than my buddies stock 1996 Z28, but I really didnt know the difference btw the two LT1's, so now I do.
The car has a MadZ PCM tune, EGR Delete, port matched gaskets and the cat was removed, AKA someone cut that bitch out and put a straight pipe into a "blowmaster" with huge tips that were made for a Z71.. I'm looking at putting a Dynomax Race Bullet 2.5" in/out where the cat was and dumping it. I hate those tips. Just an inexpensive quick fix.
In that sense, if my car is running right, then I should have a hair more power than my stock equivalent?
The car pulls harder (no doubt) than my buddies stock 1996 Z28, but I really didnt know the difference btw the two LT1's, so now I do.
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07-01-2009, 01:57 PM
#8
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No, he doesnt, however, my dash is lit up pretty well. SEL is on, and I'm assuming its 02 sensors. His car is clean, and STOCK. I have a hard time believing that the PCM tune has much to do with things on this car. It doesnt run the way it needs to. Like I said time will tell with LT's and new oxygen sensors. Does shift harder to note, so I know the PCM tune is doing somehting, but how much? Meh.
Dunno, but we'll find out soon enough.. Just need someone to read that damned OBD 1.5
Dunno, but we'll find out soon enough.. Just need someone to read that damned OBD 1.5
07-01-2009, 02:03 PM
#10
No, he doesnt, however, my dash is lit up pretty well. SEL is on, and I'm assuming its 02 sensors. His car is clean, and STOCK. I have a hard time believing that the PCM tune has much to do with things on this car. It doesnt run the way it needs to. Like I said time will tell with LT's and new oxygen sensors. Does shift harder to note, so I know the PCM tune is doing somehting, but how much? Meh.
Dunno, but we'll find out soon enough.. Just need someone to read that damned OBD 1.5
Dunno, but we'll find out soon enough.. Just need someone to read that damned OBD 1.5
This is how you read your codes for your '95 using a OBD1 scanner:
http://shbox.com/1/xraycable.jpg
07-01-2009, 02:21 PM
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^^^ Perfect. Also, I may have him outta the hole. DR's 
Not my goal to have a faster car than my friend, just a nice comparison with it being stock.
Not my goal to have a faster car than my friend, just a nice comparison with it being stock. 
