njaremka

well, work is a little slow, so i did some calculations on the gear ratios and tire sizes and max power and max torque figures all found off mazdas web site. well, the short of it is i noticed in second gear, we can hit 60.5 mph at 6500 rpm. of course, this is based on the gear ratios listed on mazdas web site, and a crude calculation of the rolling distance of the stock tires. another point, if this is true, my spedo / tach is waayy off. i think the lasat time i ran the car, at an indicated 6500 rpm, my speedo read something like 56 mph.

just thought i would share. based on 2001 es.

5SpeedP5

so basically thatd mean our real 0-60 time is much lower than what has been posted by magazines, as everyone ive heard of goes to 3rd gear

njaremka

could be. i would suspect that there could be some error in my claculations, too. i would have to know the actual rolling circumference of the tires to know more precisely. i guessed at it by taking the profile (195) times the aspect ratio (50%) times two, converted to inches, added to the wheel diamter (16), and used circumference = pi * diameter. it comes out pretty close, but it won't be exact.

nightowl

i redline in second doing 80km/h in my P5

njaremka

well, i checked up on dunlops web site, and they list the rolling circumference as smaller than i had calculated it. while it may not look like much, it made a little difference in my calcs. it now seems that to hit 60 mph in second gear, you need to rev up to 6701 rpm. while i have done this in my car, the power isn't really there. and this might be the reason that the magazines / testers had to shift to third gear.

mp5

if you dont mind the rev limiter you can push it a bit more than 60!

mp5

Too deep... you are reading too deep into the statement...

Davard

Actually, for fastest acceleration (and not 0-60 times), the shift from 2nd to 3rd should be at around 6500 rpm. This brings you into the meat of the torque curve.

For autocross, leaving it in 2nd to the rev-limiter is faster because you don't have to shift up and down, as long as you are on the rev-limiter for more than a sec or two.

And most magazines use the redline on the tach as a shift point. There are quite a few cars that would be faster if you shifted at the fuel cut rather than at the redline (Like the Celica GTS in 1st-2nd), and some are slower if taken to the redline (cars that make no power in the last 1500 rpm, only noise).

The BP Protege is faster if you shift from 1st-2nd at cut-off, because it keeps you higher up in 2nd at the shift.

David

I can't speak for the 2.0L but on my 1.8 I can not get to 60MPH in 2nd. 52-54 MPH and I'm the limiter. the speedo on almost every car are off alittle but they will be off on the plus side. By law they can't tell you your going 25MPH when your driving 40MPH (this is in stock form).

njaremka

you know, after doing my calculation, i am tending to think that the stock tach in my protege is pretty good. according to my revised calcs, i should be hitting 60mph just after redline. when pushing the car, i can hit 60 in 2nd if i rev up into the red zone on the tach, just past redline.

Davard

My stock tach is a pretty consistent 4% high. At the 7200rpm fuel cut, it registers 7500. At 70 mph, where it should read 3500rpm, it's a little below 3700. At least it's consistent. My friend's '92 LX appears to be dead on, however.

protetype

protetype

you see that Jesse? he called you stupid! what a 'tard. i hope you're not gonna take that from the likes of him. you know his kind just likes to act tough. RTFM, i'm sure it says in there somewhere that everything in Texas is bigger and better, including the ego of a certain Man.

protetype

protetype

Johnny... don't make me destroy you ::heavy breathing::