R1Outcast

So do you guys redline for like a second and then let off the gas, or do you let the rpms hover at the redline for a while?

j9fd3s

iTrader: (3)

i rev my gsl-se until the tach stops moving, but a shift at or near the redline is fine

mike

poor college student

that buzzer's funny... i went with my friend to go test drive an fc from this guy out in seal beach, and when we took it out, as soon as we got from the residential area to the umm... non-residential area, i took it up to redline and he was scared shitless... he was like oh ****! that can't be good... the look on his face was hilarious... i couldn't stop laughing for a long *** time....

dre_2ooo

Well, every trip is a little excess. Mine sees redline maybe every or every other day. But it definately sees 6500-7000 daily.

Think here, the rotors are going at 2666 RPMs at redline. The apex's run along the smooth housings with a thin layer of oil. Same as side seals. The weight of the rotor causes the eccentric shaft to wan't to bend . But we have those 18 long bolts through the engine to stop that. The heat goes up immensly so obviously, you don't hold it there for more than a second or so... SHIFT!. The most strain would be on the stationary gears, they tend to break at 9000 FlyWRPMs. I really don't see how the coolant seals would break unless it was really hot/pressurized in the system. So, all in all, it's not THAT bad for a rotary. But don't do it every trip.

Barwick

Do you ever bring it up in the high RPM range? Or do you like carbon buildup?

StarionX

I have to disagree with that. Redline is the MAX that the manufacturer recommends the engine can take consistantly. It doesn't mean you will get max power and acceleration (and acceleration is what I'm more interested in). After the torque starts dropping off, you get no more acceleration, so at that point, it is better to change gears. The only benefit of going to redline is that you don't lose time while you change gears.

But I could be wrong...

Barwick

There's power up there?

Barwick

No.. most domestics as I understand only put a redline on their vehicles because there's like ZERO power beyond it, and it's totally useless.. I'm pretty sure the engines can spin up higher, but there's no reason to do it, as there's no power there.

dre_2ooo

Ugh, you guys are wrong about the redline/torque/power issue

It really depends on the car. For a Healthy S5 N/A, 7900 is the optimal shift point. THINK, max torque/accel is at 4000. The gearing from 1-2 is huge, A shift at 6000 will take it down to like 4500 in 2nd. It's more than just torque though, it's maximum sustained horsepower throughout the entire shift/rev situation.

ugh, i made a huge post about this a while back : https://www.rx7club.com/forum/showth...ighlight=shift

StarionX

I don't want to sound like an old granny, but... There is a big difference between Max Torque, sustained Torque, and Torque dropoff, and I'm ONLY talking about Torque (accelaration)... H/P (speed) is a totally different issue. Hyperthetical example; Max torque is at 4000rpms, sustained torque between 4000 and 6500rpms, after which it drops off drastically.
With this scenario, there would be no point accelarating much past 6500 as you are no longer accelerating but just going faster at a fixed rate. Now the problem would be that if you changed gears and the revs dropped below Max torque, you are no longer in the 'power band' in which case you would need to experiment to find the optimum shift point. The only reason I can see to redline, would be to avoid a gear shift, and this would only be useful if you were doing a 1/4 mile run.
We also have to remeber that unless you are driving a completely STOCK car, everyone's shift points will be different because of different mods (more/less hp/torque) to the car.
The notion that you can go faster because you can rev the engine longer is ridiculous. A stock V8 Firechicken can't rev much past 6000, but will still wipe the floor racing a stock Rex that can rev to 7800. It's all about the 'powerband'. Going outside of that is literally a waste of time.

Ummm, in case you are wondering... I DO love my rex, but I'm also a realist.


Flame away!

dre_2ooo

Well, if you read my other thread, you'd note that the HP/Speed theory is much better for drag racing.

torque will give best accel in that GEAR.

HP will give max accel for that SPEED.

You make the call

scathcart

You've obviously never driven some of the smaller 3 and 4 banger cars.

Example: Chevy sprint- 6500 rpm redline, but no power above 4000.

You're wrong, sorry.

StarionX

Give me massive Torque Acceleration anyday... better than sex!

diabolical1

iTrader: (3)

bob13bt ~
quick question, slightly off-topic, but what kind of car is that in your avatar?