Oh yeah a whopping 30 more horsepower.............................. .

 

AHAHAHAH... this thread is turning into a my di** is bigger than yours very quickly....

Ultimately, LT-4 produces 30 additional horsepower and basically the same torque. Biggest difference as far as I'm concerned (non-performance related) is +/- 6,000 LT-4's vs. the 100,000 LT-1's.

As nice as the LT-1 motor is (I certainly don't have anything bad to say about it), I have a hard time believing anyone would say they would prefer a LT-1 over a LT-4 if given the choice - all things being equal.

 

Shame on me. I forgot about your *** dyno that can tell the difference in a miniscule amount of torque variances.

Your just more than a little pissed that you paid big money for a Grand Sport

First off, I've been hot rodding around since about the time you were even born. Second, if you choose to believe everything you read and hear you have lessons to be learned.
There is more than a little "miniscule amount" of torque variances just beteween an automatic and a stick alone. You obviously don't know that. If you had ever driven both you'd be singing a different tune.
You don't know how much I paid for my car. Oh. I forgot....YOU KNOW EVERYTHING

 

I do know this much, I know that you paid a HELL of a lot more for that Grand Sport than I did from my 30 less horse power, non-seat dyno optioned, LT-1.

 

 

Thanks for the links! Some great information here! I'm not trying to stir the pot, but did you read the article about the 1/4 mile times between the two. The best the LT1 produced was 13.68 and the best the LT4 did was 12.94. I can tell you that it takes more than 30 hp to reduce the time that much (the unknowns are the rear gear ratio, tire conditions, etc.....). The LT1 is a great motor. Very good performance and hold up very well! With that being said, drive a LT1, then jump into an LT4. There is quite a bit of difference. Another point is that the torque, numerically, might be the same, but you also need to look at where that torque is being generated in the RPM band and compare that to the redline of the motor. An example is like comparing 300 ft/pd of torque from a diesel to a gas powered V8. The diesel redlines at roughly 3k, while the V8 redlines at 5500+. Completely different feel and very different performance numbers. To make the diesel perform the same, you would need much more torque.

Again, I do like the links and the information, but always keep numbers on a page in perspective as they don't always tell what the performance difference between two vehicles really is.

Oh, by the way, I did not pay any more for an LT4 than a LT1.

I'm not bashing the LT1, just trying to add some perspective.

 

What if I were to tell you that I got that car within a real estate deal and that it really didn't cost me a dime? What was that you say?

 

Two different cars with the same hp rating can drive completely different, thats why this hp quoting/bench dyno thing doesnt mean a gawdamm thing, complete waste of time.

not totally related to this thread, just wanted to throw that out there in case anyone wanted to "read' their way in or out of the possibility of an upgrade.

 

I agree 100%, I'm just not as good at writing this blunt.

 

I say your full of ****............

 

this thread went down hill in a hurry......... as expected

 

Many people on this forum have gotten better times with the stock LT1 than the 13.68. A friend of mine who owns a 3.07 automatic stock LT1 got a 13.3x. I would think a driver in a 6 speed LT1 (who knows how to race shift properly) could get an even better time than the 13.3x that my friend got. PEACE.

 

LT-4

I am dropping out of this pissing contest but I will say this - the LT-4 and especially the Grand Sport are the most appealing options out there when you are looking below ZR-1 levels. I would be proud to own one.

 

You are correct! I was just quoting what was in the article. I've also seen LT1's run low 13's and also seen LT4's approach the mid 12's (both stock). There is an Lt4 for sale with a time slip of 12.8 (stock). It come down to the driver, but keeping the variables equal (driver, track conditions, temp, etc....), the LT4 will win.

Angel - I don't think anything should take a back seat to the LT4. The new Z06 or the earlier versions of the Z06 would handily waste an LT4!!

 

Doesn't the LT4 have more rear axle? 3.45:1 vs 3.33:1? Or no?

 

I'm not sure about all of the rear end options on LT1's between 92 and 95, but I can tell you that the LT4 has 3.45 stock.

 

ahahaha u guys crack me up!
Thanks for all the comments though. I'm pretty suprised at the 1/4 mi times though. Were the LT4's underrated or something? What do they put out on the dyno compared to an LT1?

 

Dude, This is very unlike you.....you been pallin' around with
CFI-EFI or somethin' hahahaha

 

From a lot of what I've read, The LT4 was underrated because GM did not want it rated higher than the new LS engine that would come out next year in 97.

I have a 3.07 auto 95 with a few mild mods and my neighbor has a pure stock LT4 and driving both back to back I would say that it feels like his car still pulls harder than mine from 3K on up.

 

Uh oh, Round 2 begins...

http://www.grandsportregistry.com/dyno.htm

FWIW, mine stock on a Mustang dyno did something like 291HP/300TQ on hot and humid South Florida afternoon. And that's with it breaking up around 4800rpms (still don't know what that's about)...