s28250

Hey guys,
Newbie here. Just bought a 2001 trans am Ws6 m6 bone stock and was wondering about it's performance. What do you think the top speeds per gear should be normal - I was messing around the other night and hit about 70 in 2nd - the car seems to have a good bit of power but seems a little sluggish- it is bone stock with 51 k on the odometer. I am new to Ls1's - between 3000- 6000 rpms the engine seems to really open up - this car is definetly different then any other car i have driven- at idle when i rev the engine it is a definetly a low end grunt- not high reving like for example mustangs- is this normal or is my car ragged out?

2000slp2768

as stated above ls1 are know for SOP low end grunt. They really show their colors at higher rpm. It might feel sluggish at the low end but there is still a fair amount of power there.

teke184

http://www.f-body.org/gears/

just put in the "98 fbody M6" on the drop down...and hit calculate. it will tell you what you will hit in every gear.

myslowcamaro

ls1's suck on low end. after spending 4k on h/c, full exhaust etc i only gained .1 i needed the gears to compliment everything else. so even tho i was making 420rwhp i got smoked by a stock ls1 m6. got the gears and ssra, that dropped me to 12.0 average with a best of 11.87@ 117
an a4, especially with 2.73's you can throw a brick on the gas pedal, get out, go eat luch, come back to get in the car in time before it starts waking up

Kraest

You need a 3600+ stall and 3.73 gears. Your car probably makes peak torque somewhere around 4500 rpm. You'd do best getting a 4000 stall, but that's a little big for daily driving.

Kraest

Time to buy a 4.10 gear.

Tails

Mine don't suck on the lowend.. Sounds to me like you didn't matchup your h/c package very well..

Before:

This was with full bolt-ons.

After:

This was after a custom cam that's similar to the X2 cam, AFR 205's, and a FAST90/90..


Tails

myslowcamaro

yeah, thats in the works. getting one from fuddle with the anti-ballon plates.

TAILS- that may have been the case, just basing my observations onmy experience and few other owners who claim the lt1 has more lower end than the ls1. i always had the power with the h/c, it just didnt want to launch, but no its not matched to the tc, tc is still stock. with that in mind, people say you gain up to .5 with a decent stall, so running a low 11's car n/a with basically h/c would suit me fine but still want n20

Kraest

The LT1 DOES have more lowend, right from the factory because it uses 175cc 23* heads and makes peak torque around 3000 rpm, where the LS1 uses 195cc-200cc 15* heads and makes peak torque around 4400 rpm from the factory.

Whenever you increase power on an NA motor without changing the displacement of the motor, the torque curve is going to change higher, as will the horsepower, since horsepower is a calculation of torque: e.g., there's a tradeoff.

Mike