Feenix566

Is the difference between the 345hp/350tq LS1 and the 350hp/375tq LS1 noticable?

byte_me

From the point of in the "seat of the pants" you mean? I have a 97 (ealry LS1 numbers above) and have driven the newer LS1 and really didn't notice anything (if anything the torque increase) 5 HP is not noticable.

The newer LS1 engines 01 and up used the LS6 intake and LS6 block with the same internals - the oil passages internal are different from old to new as well as the cams (with the exception of the 00' model that had a unique cam grind that year only)

Basically (and some will argue) that the cam grind and intake manifold are the reasons for the increase...I want to say they also changed the exhaust manifold design to a cast iron type as well...I read they did this because the early manifolds took too long to weld in production.

Polar Jet

In most track tests I've seen a read about, the 01-04 appears to be a couple of tenths faster in the 1/4 mile than the 97-00. One of the reasons I picked up an 01 is because of this. A well driven 6 speed might benefit from it moreso than the A4's. The A4's only went from 350 to 360 torque.

army2000

5hp is no big deal considering you can gain/loose 5hp with the weather/temperature. 25 lbs of torque is noticable. However, I hear the LS1 engine block is alot stronger in terms of modification capabilities.

FrankTank

you will notice more of a difference in torque going from an A4(stock) to a 6speed (stock) because of the Gearing difference, and less parastatic HP loss in the 6 speed vs the A4.

But at the engine itself, very little noticiable difference.

BlownV6

The only reason the 01's+ are faster is because of the LS6 intake and better exhaust manifold's.

Picking up a 97 over a 01 leave's more mod money to easily erase the 01's .1-.2 tenth advantage

JH

Yes, there most certainly is. Somewhere in this remarkable online resource, there was a thread about the later A4s with the 3:15 rear axle ratio logging acceleration numbers that matched the earlier M6 with the standard rear axle ratio. That influenced my purchase of a 2002, A4, 3:15, Z51, sport seat coupe.

Polar Jet

I know 2001 's had a few upgrades (second gen AH for one), but if the 01's and up are faster simply because of the intake and exhaust manifolds, then why should the torque output between the A4's and the M6's be different by 15 lbft? I can't see the tranmission in the A4 robbing just thoses 2 things to that extent.

Feenix566

I'm not planning on modding my car. Been down that road before. Spent a lot of money and a lot of time and got almost zero results. I'm not a mechanic, nor am I inclined to learn to be one. I really don't care that much about quarter mile times, because I'm not planning on drag racing much. Honestly I don't see how some people never get bored of flying down that straight track over and over again, but to each his own. I just want a car that's fun to drive.

C5 KIDD

for many its a great way to test out the mods that have installed on their cars. its always fun to take a stock car, and monitor its progress as you add more mods.

for me... its just a great place to go WOT without having to worry about cops!!

byte_me

and hang out with your buddies too boot!

Polar Jet

M_T_0

IMO the above makes the car a LOT more fun to drive.

More Than Zero

BlownV6

After 98 Gm started screwing around with the cam specs of the LS1. In 01 Gm went with the LQ9 truck cam to better enhance low end torque.

Numbers don't lie. I pulled a 13.3 at 106 bone stock with my 97. She dyno'd 294rwhp, 307rwtq a week before that 1/4th run.