Lt4
Race Director
Joined: Feb 2003
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From: Everyday you must choose between the pain of discipline and the pain of regret. Fredericktown, OH
Originally Posted by lookingforvette
i heard the Lt4 motor in 96 was actually underated.
is this true or not?
i heard they vary in hp as well from as low as 335-340 to as much as 385 or 390
any info is appreciated
thanks
is this true or not?
i heard they vary in hp as well from as low as 335-340 to as much as 385 or 390
any info is appreciated
thanks
Ah hah, here we go again. I think the common concensus is that there is truth in the notion it was underated, but more in the 330-350 range. The claims of 380-390 HP LT-4s from the factory are relagated to urban legend status at this point.
Race Director
Joined: Feb 2003
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From: Everyday you must choose between the pain of discipline and the pain of regret. Fredericktown, OH
Originally Posted by lookingforvette
so what does a stock lt4 usually do in the quarter?
i was just reading a mag article on it
i mean can u really feel a big different from an lt1?
thanks
i was just reading a mag article on it
i mean can u really feel a big different from an lt1?
thanks
It all depends on the driver, but a typical stock LT-4 is a low 13 second car and a typicaly stock LT-1 is upper mid-13s. I don't know if you can feel that on the street though, but .5 at the track is a lot.
Some have gone 12s with a stock LT-4, I've gone 12.90s in mine. Then again, Mr.Mojo has, I believe, gone extremely low 13s if not high 12s in an LT-1. He is an extreme example however.
The LT-4 tends to make it's additional power in higher RPM range. Torque is nearly ,if not identical, to an LT-1.
Race Director
Joined: Sep 2004
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From: St. Peters MO Sometimes you have to prove yourself by doing alot of killing or alot of dying...
I remember reading that Motor Trend or Car and Driver did a comparo and could not notice any difference except for a higher top speed... with that said... the LT4 has been claimed to be underrated, but power is nothing without traction and driver.
Drifting
Joined: Jun 2001
Posts: 1,490
Likes: 17
From: Darlington, MD
Most of the dyno runs I have seen on stock LT4's were around 300 RWHP, give or take a few HP. This would be equal to about 345 to 350 HP. I think it has been proven that they are slightly under rated. JMHO. Guy
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From: Everyday you must choose between the pain of discipline and the pain of regret. Fredericktown, OH
Originally Posted by 85vetteguy
Most of the dyno runs I have seen on stock LT4's were around 300 RWHP, give or take a few HP. This would be equal to about 345 to 350 HP. I think it has been proven that they are slightly under rated. JMHO. GuyIt may be a dead horse to LT-4 guys, but maybe not so to folks new to them.
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Team Owner
Joined: Sep 2002
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From: OBAMA IS HITLER
Originally Posted by lookingforvette
if you had the opportunity to get a 96 lt 4 with 90 k on it or a 94 lt1 with 85k on it
which would u chose? the lt4 is 2k more
let me know
which would u chose? the lt4 is 2k more
let me know
Melting Slicks
Joined: May 2003
Posts: 3,490
Likes: 68
From: Hewitt NJ
Originally Posted by lookingforvette
if you had the opportunity to get a 96 lt 4 with 90 k on it or a 94 lt1 with 85k on it
which would u chose? the lt4 is 2k more
let me know
which would u chose? the lt4 is 2k more
let me know
Burning Brakes
Joined: Nov 2004
Posts: 834
Likes: 1
From: Keller Texas
With that said it makes me feel even better about my LT4! I bought this car with 109k on it for 11,500! It is red with red interiour and the F45.It was a everday driver for the guy I bought it from. Very nice condition. Needs a little cleaning and it will never see rain again......
Race Director
Joined: Aug 2003
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From: San Jose Pat Tillman - American Hero
With the performance mods in my sig (Headers, RT cats, Corsa, and K&N/open lid - pretty "basic"), my LT4 dyno'd 324RWHP on a cool day.
If you assume 15% loss, it works out to = 381chp
If you assume 18% loss, it works out to = 395chp
Either way you want to figure it, if the engine were 330chp from the factory, that would be a *serious* kick in the pants for noting more than a new airfilter, and an opened up exhuast. I'd say it's underrated.
FWIW, a bone-stock '04 coupe at the same dyno day put down 306RWHP.
If you assume 15% loss, it works out to = 381chp
If you assume 18% loss, it works out to = 395chp
Either way you want to figure it, if the engine were 330chp from the factory, that would be a *serious* kick in the pants for noting more than a new airfilter, and an opened up exhuast. I'd say it's underrated.
FWIW, a bone-stock '04 coupe at the same dyno day put down 306RWHP.
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From: Stafford, Virginia Kittah, Kittah, Kittah...
Originally Posted by LT-4 CE
It all depends on the driver, but a typical stock LT-4 is a low 13 second car and a typicaly stock LT-1 is upper mid-13s. I don't know if you can feel that on the street though, but .5 at the track is a lot.
Some have gone 12s with a stock LT-4, I've gone 12.90s in mine. Then again, Mr.Mojo has, I believe, gone extremely low 13s if not high 12s in an LT-1. He is an extreme example however.
The LT-4 tends to make it's additional power in higher RPM range. Torque is nearly ,if not identical, to an LT-1.
Some have gone 12s with a stock LT-4, I've gone 12.90s in mine. Then again, Mr.Mojo has, I believe, gone extremely low 13s if not high 12s in an LT-1. He is an extreme example however.
The LT-4 tends to make it's additional power in higher RPM range. Torque is nearly ,if not identical, to an LT-1.
The LT4 pulls so much harder at the top end where the LT1 starts falling off... The LT4 feels like it can pull through the red-line where in the LT1 you can feel the urgency to shift at the top of the range...
One thing I've read is that the LT4 torque curve is flatter than the LT1 through the RPM range... I don't know for sure as I've never had my LT4 dyno'd like I did my LT1... It does feel stronger off idle than my LT1 did though...
My LT1 car was a mid 13 second car (13.64 @ 103) and driving back to back, the LT4 felt noticeably stronger...
So personally, I'd get the LT4 if you can swing it... I held out when I was on the quest for a 6 spd and I'm glad I did... But either way, you can't go wrong with the LT1 either, it's a solid motor...
