N20LS1

Why do LS4 powered cars trap over 100MPH (102/103) in the quarter mile, and are rated at 303hp, while the old LT1 vettes/camaros had about the same 1/4 mile MPH, with about the same horsepower, but weighted much less?

I think GM underrated the LS4 engines, I think the have about 320hp or more.

SpeedyZ

I think that the old Lt1 were rated at 275 HP. My LS1 in my 01 was rated at 305 HP which was under rated

raven_450

iTrader: (3)

the more they under rate the cars the happier ppl are when they run good numbers and i believe its for insurance purpases aswell i believe ford had to do this with the 03/04 cobras? not 100% sure though

BigMikeGXP

I also think they are underated some also. Average ETs would even be better if the damn things would grip in the 60 foot. But the car does have alot more low down torque than top end horsepower so that may be why it seems to be rated low. I don't even shift out of 2nd gear in the quarter mile. I think it has a 2.93 final drive... can't remember for sure. We won't know unless someone yanks it out and straps in on a dyno.

jdaniels

iTrader: (12)

I wouldn't say they are underrated, but they are quite strong. I found this in the Free Magnaflow Exhaust thread... https://ls1tech.com/forums/showpost....28&postcount=7

That seems about right for the rated power.

GTPprix

I've seen engine dyno results, it's right on the money.

GXPPOWER

we dont have 2.93 gears. we have 3 something.

TonyGXP

no the final drive is 2.93, the SS's is 3.29 ..mine is 4.10

GXPPOWER

does that 4.10 stand for 4-10 mpg on the hiway..... AHAHHA

hurley_21_07

iTrader: (1)

That's one fast SS you got there.

Dan

BuffaloSS

iTrader: (3)

Genesis_26317

iTrader: (2)

That thing runs a single cat????

Wow, it really needs two... in all honesty though to push that much power out of a stock exhaust designed like that is really impressive. It has 3 more hp and ft/lbs of torque than the Mustang, imagine after bolt-ons.

How bad is the torque steer with that vehicle??? My Taurus was wild off the line and it couldn't hold traction until it hit third gear.

BuffaloSS

iTrader: (3)

If you're new to the vehicle and drop the pedal (even at 65), you better have a decent handle on the wheel...b/c it will pull you across the highway if you're not paying attention. I've gotten used to it, though, and it's no longer an issue.

hexxLS4

iTrader: (1)

Same here...at first the torque steer was pretty bad when I would get on it...now I barely notice it anymore and can launch comfortably with one hand on the wheel.