LT1 horsepower?
Thread Starter
Instructor
Joined: Apr 2004
Posts: 231
Likes: 10
From: Billings Montana
LT1 horsepower?
Given that Chevrolet rated the 1992 LT1 at 300 hp and with all of the improvements that they made in this motor since 92' Even though Chevrolet never changed the hp rateing. What is an educated guess as to the true hoursepower of my 1995? I have a friend who has a 92' and I beat him by 2 car lengths. 
Race Director
Joined: Feb 2005
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From: San Diego, CA
...Well then you're friend either can't drive (at all), the engine was not running well, or a little of both. There is no reason that you should have beaten him by that much when they are the same engine with essentially the same specs (I think they may have added like 5-10hp).
Team Owner
Joined: Aug 2003
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From: Kerrville, Texas USA Hook 'em Horns!
CentralTX Events Coordinator
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17
95s and 96s should be pretty close. Here is a dyno sheet from mine that was taken a couple of months ago with basically a stock LT1 with a Corsa catback and an A4.
I have since added a few more mods but havent's had a chance to dyno it. See sig for details.
I have since added a few more mods but havent's had a chance to dyno it. See sig for details.
Team Owner
Joined: Sep 2001
Posts: 62,178
Likes: 1,740
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
The LT1 was not underrated, nor overrated, if you look at dyno results that have been posted here over the last few years. A few cars are especially strong, as you should expect, but most fall right where theyre supposed to.
300hp is accurate.
LT4 in 96 is a different story.
300hp is accurate.
LT4 in 96 is a different story.
Burning Brakes
Joined: Mar 2005
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what trans?if both auto's,what kind of gears do you have?they came with either 2.59's(GM1)or 3.07's(G44)those gears are usually about .2sec quicker 0-60 and 1/4mile.also,are both cars totally stock,and same mileage,state of tune?lots of variables with used cars.theoretically,they are the exact same engine,besides cam,and fuel metering,92(speed density)and 95(mass air)rumor for both vettes and f-bods is speed density cars are slightly faster than mass air cars from the factory.
Last edited by vette&f-bod lover; May 5, 2005 at 12:37 AM.
Melting Slicks
Joined: Apr 2004
Posts: 3,287
Likes: 7
From: n/a SC
2.59 vs 3.07s is a lot of it + the torque diff but I swear theres a big diff in performance from a 92 vs 95-96 well really 94-96...I walk off from any 92 I've ever raced my friend has a nice 92 wth 43k miles on it he bought new (he's way older than me ) but it just don't got it when compared to my 95
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Drifting
Joined: Aug 2000
Posts: 1,757
Likes: 35
From: Bedford Mass
Guys,
From what I've read, the big difference is when they went
to the 4L60-E or "electronic" transmission. I think that the
tranny made the biggest performance difference.
And I think they did that in '94.
Please correct me if I'm wrong.
And yes, my vert. has 3:07's. I would not have bought it
without them. It makes the car zippy....
Thanks,
Mark
From what I've read, the big difference is when they went
to the 4L60-E or "electronic" transmission. I think that the
tranny made the biggest performance difference.
And I think they did that in '94.
Please correct me if I'm wrong.
And yes, my vert. has 3:07's. I would not have bought it
without them. It makes the car zippy....
Thanks,
Mark
Melting Slicks
Joined: Jul 2004
Posts: 3,235
Likes: 1
From: Sterling Va
Differences in manufactoring can also contribute. When you make a billion identical engines, using all the same parts in each one. Some will invariably make more power. 300 hp is a baseline average, some will make more some will make less, sounds like you got a good one. As stated before, check for gearing. 
Race Director
Joined: Sep 2004
Posts: 13,793
Likes: 0
From: St. Peters MO Sometimes you have to prove yourself by doing alot of killing or alot of dying...
Originally Posted by vette&f-bod lover
what trans?if both auto's,what kind of gears do you have?they came with either 2.59's(GM1)or 3.07's(G44)those gears are usually about .2sec quicker 0-60 and 1/4mile.also,are both cars totally stock,and same mileage,state of tune?lots of variables with used cars.theoretically,they are the exact same engine,besides cam,and fuel metering,92(speed density)and 95(mass air)rumor for both vettes and f-bods is speed density cars are slightly faster than mass air cars from the factory.
