RPM Question

[gstjoker]

Guys! I'm new to this so sorry for my stupidity and knowledge about this topic. If you could just direct me to a topic similar like this that has been talked about already or if not, please give me some advice.

When you're driving your manual DSM or car. Where is your RPM usually at? Mines usually between 3000 too 4000. Where should I leave it at to save more gas?

Or if I'm street racing, any advice as to how to make a fast launch? I heard someone telling me to redline 1st gear. Just wonna know more facts and advice about this if you can just give me some.

Thanks:rolleyes:

[Kracka]

5500 rpm seems to be the norm for launching. As for driving, just keep it where you feel comfortable and the engine doesn't seem to be struggling. 3-4k rpm is fine; if you're on flat ground traveling at a constant speed you could bring it down further to 2500 rpm to get a bit better fuel economy.

[Black97civic]

For fuel economy, as the kracka said, as low as you can go comfortably.

[niterydr]

5500 rpm seems to be the norm for launching. As for driving, just keep it where you feel comfortable and the engine doesn't seem to be struggling. 3-4k rpm is fine; if you're on flat ground traveling at a constant speed you could bring it down further to 2500 rpm to get a bit better fuel economy.
I wouldn't recommend below 2000rpm, and usually below 2500rpm. Lower than that, and you are usually "lugging" the motor.
Not fun for bearings and such.

[Jakey]

I wouldn't recommend below 2000rpm, and usually below 2500rpm. Lower than that, and you are usually "lugging" the motor.
Not fun for bearings and such.


Huh?

[Shotgun!]

95 RT/TT=1800rpm on highway. How's my bearings?

[A//// Guy]

Never heard of too low of an RPM affecting bearings... unless you mean that the oil pump isnt operating fast enough and the motor is starving? I dont think thats such a big deal with newer cars and transmission technology. Youll know when your too low in a gear because the car will vibrate and have no power.

[Goat Blower]

That also depends on how much torque an engine has. Diesels can cruise at 1300 rpm because they have an abundance of torque. The 3S's have quite a bit more torque than DSM's as well, so they can get away with a taller overdrive. Since 65mph is about 3100 rpm in a DSM in 5th gear, you'd have to be going pretty slow to get the engine under 2000 rpm in 5th. Unless you have some really tall tires, which would change the effective overall gear ratio.

[LightningGSX]

Lower RPM = Less stress on bearings, even at lower oil pressures

[LightningGSX]

BTW Engine load makes a much larger difference in fuel consumption, than RPM