Umm is anyone else going at 80mph at 4000rpm??!?! - Page 4

JCLW · #61 (**permalink**) 11-04-2008, 11:02 AM

Quote:

Originally Posted by kylerwho

do you know how they calculate this for the rotory motor?

Rotor tip speed.

mahout · #62 (**permalink**) 11-04-2008, 04:09 PM

Quote:

Originally Posted by JCLW

Rotor tip speed.

Feet per minute is calculated the same by multiplying the circumference of the roatry chamber base circle in ft by rpm.
The limit is hardly 2500 orr 3500 fpm however, as thee is no acceleration and deceleration to put the enormous strains on the bearings.The limit there would probably be the fpm in which the surfaces could carry lubricant between them. As a guess I would say 8000 fpm.

Occam · #63 (**permalink**) 11-07-2009, 04:16 AM

This thread amuses me.

For what it's worth, my Element was a 5MT, and in 5th gear, gained 20 MPH per 1K revs. 3K at 60, 3.5K at 70, 4K at 80. I test drove a first-generation Scion xB back in '06: I noted that it was the same.

On the other hand, at 75 mph, my Ninja is running happily at 5500 RPM. At 75, my wife's lil Ninjette (a 250cc Ninja) runs at almost 10,000. Mine redlines at 11,000, hers at 13,000. They have smaller pistons, and short strokes, but otherwise aren't terribly different than any car engine. Mine (a Ninja 650R) is a DOHC fuel-injected parallel twin.

With a sportbike in the garage, I have no need for a car to go fast! The 650R will hit 60 in under 4 seconds A slow Fit is perfect... and gets almost the same mileage. (45 mpg or so under most conditions)

Fitcious · #64 (**permalink**) 11-07-2009, 05:23 AM

wow you brought an old thread back from the dead! hahaha

Schadenfreude · #65 (**permalink**) 11-10-2009, 12:42 AM

Quote:

Originally Posted by Darkstars

not sure about you guys but I've never seen an 80 MPH speed limit... problem solved

West Texas.

chrisakasparky · #66 (**permalink**) 11-10-2009, 03:37 PM

Going to the beach from Orlando = driving 100mph

novascroller · #67 (**permalink**) 11-12-2009, 04:32 PM

Quote:

Originally Posted by sam21

WTFF?!

I've noticed this ever since i bought the car but always forgot to bring it up here.Is it just me?!!?80mph at 4000 and 65-70at 3500 is NOT cool.Both for mpg and comfort.

Is there a TSB about this from Honda?

slowing down may be a good idea.

B1str0 · #68 (**permalink**) 11-12-2009, 05:32 PM

^^^ the op doesnt have a fit anymore lol

Red 05 · #69 (**permalink**) 11-12-2009, 06:57 PM

The highest I get up to anywhere in town is maybe 75, and that's if I'm trying to pass someone on the one mile highway I take on part of my commute to work. The rest of the time I'm driving along at 65 MPH closer to my house, and around 45 when I get closer to my work. I knew the MT reved higher, but I also knew the MT would be alot more fun to drive than the AT. Besides, paying 22 bucks for a fill up is awesome anyway.

Selden · #70 (**permalink**) 11-12-2009, 08:14 PM

Quote:

Originally Posted by sam21

WTFF?!

I've noticed this ever since i bought the car but always forgot to bring it up here.Is it just me?!!?80mph at 4000 and 65-70at 3500 is NOT cool.Both for mpg and comfort.

Is there a TSB about this from Honda?

BFD. My Honda N600 car turned 5000 rpms at 70 mph. I put 93,000 miles on it before I sold it. My R1100RT motorcycle turns about 4500 at 80, which is relatively low RPMs for a motorcycle engine.