More Horsepower!

[ezion]

Originally Posted by guybo

HP sells cars, torque wins races.

Signed,

Complete Bullshit

[guybo]

I'm pretty sure Enzo Ferrari knew more about engine power than either one of us. Enzo says torque is king then torque is in fact, king.

I'd rather the twins have 151 HP and 200 tq

[ezion]

Originally Posted by guybo

I'm pretty sure Enzo Ferrari knew more about engine power than either one of us. Enzo says torque is king then torque is in fact, king.

If he really said that, context would be critically important.

I'd rather the twins have 151 HP and 200 tq

Than either you don't know anything about engines, or you want your car to be slower.

A great case for this is the Golf TDI. It has nearly 100 more Tq than an 86, but 50 less HP. And even though the low torque feels great in the TDI, an 86 will obliterate it in a drag race because of its 50hp advantage.

Horsepower is only a function of torque and RPM. Look at diesel trucks to flesh this out. A ton of torque at low RPM is great if you want to pull a stump out of the ground, but while torque is twist, horsepower is the actual work being done. You have to spin the engine to some amount to create work. An engine that makes 300 torque at 2000rpm is making 114hp at 2000rpm. An engine that is making 300 torque at 7000rpm is making 399hp at 7000rpm.

Since HP and Tq are functions of one other through RPM, they're related. The fact is, being able to sustain torque through revs (horsepower) is what will make the engine propel the car faster, without fail.

[billwot]

Horsepower is only a function of torque and RPM.

...torque is twist, horsepower is the actual work being done.


. The fact is, being able to sustain torque through revs (horsepower) is what will make the engine propel the car faster, without fail.

Horsepower = torqueXRPM/5252

[Braces]

Originally Posted by guybo

I'm pretty sure Enzo Ferrari knew more about engine power than either one of us. Enzo says torque is king then torque is in fact, king.

Funny .... when I think of Ferraris ... I don't think of torque monsters.

[Ashikabi]

Originally Posted by Braces

Funny .... when I think of Ferraris ... I don't think of torque monsters.

Probably because they have crazy hp numbers too. I'm sure their torque is more than adequate

[brandonblt2]

Originally Posted by ezion

but while torque is twist, horsepower is the actual work being done.

That's actually a false statement. Both are forms of work one is rotational and the other is linear. In simple terms how I view torque vs power is:

Torque = Initial acceleration up until 5,252 rpm
HP = Top Speed/ acceleration after 5,252 rpm

[mdm]

Originally Posted by brandonblt2

Torque = Initial acceleration up until 5,252 rpm
HP = Top Speed/ acceleration after 5,252 rpm

This is actualy completely wrong. There is nothing special about the 5,252 number, nothing changes qualitatively about the engine operation at that RPM.


The fact that the curves "cross" at 5,252 means nothing, as each curve plots a different parameter using different units.


It's just a shorthand for calculation, resulting from using particular units for HP and Torque.


Power [in HP] = torque [in lb ft] X RPM/5252


If you used the civilized and scientific SI units, the factor is 9,549


Power [in kW] = torque [in Nm] x RPM /9549

If you expressed torque in lb in, again the factor would be different

Power [in HP] = torque [in lb in] X RPM/63024

[mdm]

Even if you use lb ft and hp, it's perfectly correct to use different scale for hp and for torque - because these are different parameters. Andd in such case the curves won't cross at 5252 even if you use hp and ft lb, like in this example

[brandonblt2]

Originally Posted by mdm

This is actualy completely wrong. There is nothing special about the 5,252 number, nothing changes qualitatively about the engine operation at that RPM.


The fact that the curves "cross" at 5,252 means nothing, as each curve plots a different parameter using different units.


It's just a shorthand for calculation, resulting from using particular units for HP and Torque.


Power [in HP] = torque [in lb ft] X RPM/5252


If you used the civilized and scientific SI units, the factor is 9,549


Power [in kW] = torque [in Nm] x RPM /9549

If you expressed torque in lb in, again the factor would be different

Power [in HP] = torque [in lb in] X RPM/63024

I wouldn't say I was completely wrong I still stand by my thought process for torque and hp, one dealing with initial acceleration and the other top speed and acceleration afterwards. I agree as you indicated rpm cross over where torque and hp switch is a variable depending on the engine itself and not a constant that I thought it was.

[Scenic Driver]

Originally Posted by ezion

A great case for this is the Golf TDI. It has nearly 100 more Tq than an 86, but 50 less HP. And even though the low torque feels great in the TDI, an 86 will obliterate it in a drag race because of its 50hp advantage.

I had a Golf TDI before the BRZ and I prefer the way things are now. The torque was nice but I always had to remember it wasn't as fast as it felt like it was going to be especially when merging onto crowded highways.

[VenomRush]

Tried to pass up a 92 accord to get to another lane yesterday... He took it personal and he stepped on it so i stepped on it and still didn't pass him. Ending up missing my exit. More horsepower wouldve been great.

[Ashikabi]

Originally Posted by VenomRush

Tried to pass up a 92 accord to get to another lane yesterday... He took it personal and he stepped on it so i stepped on it and still didn't pass him. Ending up missing my exit. More horsepower wouldve been great.

You got rekt by a stock Honda LOLOLOL

[shiumai]

Originally Posted by VenomRush

Tried to pass up a 92 accord to get to another lane yesterday... He took it personal and he stepped on it so i stepped on it and still didn't pass him. Ending up missing my exit. More horsepower wouldve been great.

Well, that's when you're supposed to step on your brakes, slip in behind him, and exit.