low end torque?
low end torque? I have been wondering this for a while...
what good is low end torque ie. 0-3xxx rpms?
if you have gears you should very rarely see these kinda rpms so what is the big "hoopla" about the low end torque?
M6's launch over 3000 rpms
A4's have converters....
i just dont understand
... can some one please inform me.
TIA
Tyler
what good is low end torque ie. 0-3xxx rpms?
if you have gears you should very rarely see these kinda rpms so what is the big "hoopla" about the low end torque?
M6's launch over 3000 rpms
A4's have converters....
i just dont understand
... can some one please inform me.TIA
Tyler
I agree, who cares about torque below 3000rpms? I know I don't. The only thing I can think of is for just regular driving. It doesn't really make sense though because if I want to go faster I give it more gas, if I don't want to go fast it doesn't matter what my torque is.
!LS1 11 Second Club
Joined: Apr 2003
Posts: 7,133
Likes: 2
From: Miami
Low end tq is fun, plain and simple. I remember my buddy punching it in his brand new '89 5.7L IROC-Z. The thing would kick you back in your seat right away. Didn't matter that the engine couldn't breathe past 4500rpm, it felt fast getting there. 
low end torque is required for being able to break the tires loose in 5th gear on the highway as the ricer decides to show off next to you...
so you leave it in 5th and just put your foot down and show him what a real engine can do....
2.0 liters...LOL.... I drink more beer than that on saturday night
so you leave it in 5th and just put your foot down and show him what a real engine can do....
2.0 liters...LOL.... I drink more beer than that on saturday night
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I rarely leave from a stop light at 3000 rpm. I usually leave from the stop light around 1100 rpm. Off idle to 3000 rpm torque is where it's at on the street.
Mash the gas, smoke the tires (no shifting) requires torque.
Torque is king on the street. HP rules at the track.
Mash the gas, smoke the tires (no shifting) requires torque.
Torque is king on the street. HP rules at the track.
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TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Torque is king on the street. HP rules at the track.
Personaly I like a high trq motor, problem is "hooking" on the street. Most challenges are from a roll, so I would say to favor more hp for the street and more trq at the track.
Originally Posted by equandt
I rarely leave from a stop light at 3000 rpm. I usually leave from the stop light around 1100 rpm. Off idle to 3000 rpm torque is where it's at on the street.
Mash the gas, smoke the tires (no shifting) requires torque.
Torque is king on the street. HP rules at the track.
Mash the gas, smoke the tires (no shifting) requires torque.
Torque is king on the street. HP rules at the track.
Suggestions welcome.....
Looks to me like the low end torque is more for the M6 guys. That makes more sense because for me high rpms are just a pedal away no matter what gear I'm in or what speed I'm going. Man I love my torque converter.
TECH Veteran
Joined: Aug 2003
Posts: 4,954
Likes: 1
From: Kent WA
low end torque is good if you want to pull a boat... but in that case, a diesel truck will serve you better than an LS1 f-body. A nice torque curve is more important than the actual low end numbers.
When I race, I'm dumping the clutch at over 5k rpms anyways... so I don't give a crap about torque from 0 rpms to 3k rpms. And if I ever go for a pull on the street, it's from a roll... because with my gears and power, 1st gear is pretty much useless at anything past half throttle anyhow.
When I race, I'm dumping the clutch at over 5k rpms anyways... so I don't give a crap about torque from 0 rpms to 3k rpms. And if I ever go for a pull on the street, it's from a roll... because with my gears and power, 1st gear is pretty much useless at anything past half throttle anyhow.
technically the saying that torque gets you off the line and horsepower wins the race is wrong.....
Horsepower is a direct math function of torque and rpm.... so technically torque wins the race...
HP = (TQ x RPM)/5252 (also the reason why all TQ/HP curves cross at 5252)
so its always torque that you want....and higher torque at higher rpms = more HP by the math
on the street the flatter the torque curve...the more fun the car is usually...which means you need more low end torque....
Horsepower is a direct math function of torque and rpm.... so technically torque wins the race...
HP = (TQ x RPM)/5252 (also the reason why all TQ/HP curves cross at 5252)
so its always torque that you want....and higher torque at higher rpms = more HP by the math
on the street the flatter the torque curve...the more fun the car is usually...which means you need more low end torque....
Originally Posted by soundengineer
technically the saying that torque gets you off the line and horsepower wins the race is wrong.....
Horsepower is a direct math function of torque and rpm.... so technically torque wins the race...
HP = (TQ x RPM)/5252 (also the reason why all TQ/HP curves cross at 5252)
so its always torque that you want....and higher torque at higher rpms = more HP by the math
on the street the flatter the torque curve...the more fun the car is usually...which means you need more low end torque....
Horsepower is a direct math function of torque and rpm.... so technically torque wins the race...
HP = (TQ x RPM)/5252 (also the reason why all TQ/HP curves cross at 5252)
so its always torque that you want....and higher torque at higher rpms = more HP by the math
on the street the flatter the torque curve...the more fun the car is usually...which means you need more low end torque....
Exactly what i said above... 
TECH Veteran
Joined: Aug 2003
Posts: 4,954
Likes: 1
From: Kent WA
Originally Posted by 87GN&98VET
Think of the C5Rs. Those cars beat everyone out of a turn because of the low end torque the big 7.0L produces. They don't rev to high but they sure win a lot of races.
The fact is, the way LSx engines are designed, they produce very good power through the entire rpm range, even at the lower rpms. Most of the cams that are available don't reduce low rpm torque or power enough to worry about. But the midrange and high rpm gains can be quite significant.
I believe the exceptional low rpm power of these engines is a product of their long-runner intake manifold, smaller bore and longer stroke, and longer connecting rods. All of this is relative to the old SBC design of same displacement.
The short answer is, with a cam duration in the 230's, you're not going to loose enough low rpm response to worry about, but you stand to gain a lot on the high end.
I believe the exceptional low rpm power of these engines is a product of their long-runner intake manifold, smaller bore and longer stroke, and longer connecting rods. All of this is relative to the old SBC design of same displacement.
The short answer is, with a cam duration in the 230's, you're not going to loose enough low rpm response to worry about, but you stand to gain a lot on the high end.
Interesting responses......
Lower end torque is utilized in both autocross and road racing.
In these sports, your goal is to be smooth to keep from upsetting the balance of the car. To help this, low end torque helps sustain speeds in corners while allowing one to "squirt" out of a corner quicker without "rowing" the transmission.
Another aspect related to these two sports is that you're not always in the upper RPM range, this is to help the longevity and heat soaking of the engine.
.....these sports are more of an art then one might first think.
Now as stated by quite a few above - 1/4 mile is more about the higher RPM range.
Lower end torque is utilized in both autocross and road racing.
In these sports, your goal is to be smooth to keep from upsetting the balance of the car. To help this, low end torque helps sustain speeds in corners while allowing one to "squirt" out of a corner quicker without "rowing" the transmission.
Another aspect related to these two sports is that you're not always in the upper RPM range, this is to help the longevity and heat soaking of the engine.
.....these sports are more of an art then one might first think.
Now as stated by quite a few above - 1/4 mile is more about the higher RPM range.