Exxxxxactly. Thank you.

 

Haha, yeah I think he redlined neutral while falling off a cliff.

 

With my old motor i ran it up to 150mph and had room to move still but the road was rather bumpy in a certain sectoin so i backed off. i can't honestly remember what RPM i was at but it was up there close to red line. Gonna take my car out to the "hiway" and run her up again and see what she runs with the new motor and tires.

 

100 mph in 4th and to finish it off 135 in 5th at i think was 6000rpms

 

FD's did 158 stock

this is their info

1st - 3.483:1
2nd - 2.015:1
3rd - 1.391:1
4th - 1:1
5th - .719:1
rev - 3.288:1

final drive hypoid - ratio 4.1:1

what are the FC's?

 

some people are so ignorant...did you ever think maybe i dont have a big heavy hog of a 2nd gen??

under 2000lbs with a good amount of hp.

1st 3.622
2nd 2.186
3rd 1.419
4th 1.000
5th 0.758

rear gear 4.08


redline in 5th no problem easy as hell.
in fact my quarter mile is in 5th gear......


have some imagination.

 

Under 2000 would require some serious cutting. Not to mention that'd be around 190mph.... You'd also need some serious 'hp' as you say. Not to mention you'd be doing 130mph by the time you shifted into 5th, unless you totally blew 4th and shifted at 5k at which case you'd still be around 100. So... to finish a 1/4 at over 130mph would require just how much hp again? Not to mention you'd be in the 10's (this is assuming you actually redline 4th, which would be the smartest idea, since it'd accelerate faster than 5th anyway) Now, assuming this. I'd guess you'd at least pull 1-2k rpm in 5th or why even bother shifter, so you'd be well into the 9's if you would actually need to use 5th in a quarter, given those gear ratios and common sense at where you'd probably shift into 5th from 4th, to give a rough estimate of speed. So what exactly do you consider a 'good' ammount of HP?

 

you need a LOT of imagination to be in 5th at the end of the 1/4. Or you shift at 3k.

my car has a buttload of power and I'm still just in 4th at the end of 1/4.

I don't know how FAST, km/h wise... but 7400 in 5th with 215/55/16 tires. Stock diff, stock tranny.

 

my tach MUST be off.

according to the gears (.756 rear, 4.1 diff), 215/55 tires 7400RPM = 180mph.

my car is NOT 180mph fast. No way in hell.

7000 = 170MPH... that seems more reasonable, but still a little high.......

 

150, cant get it any higher

 

the tach will read off on almost every car. Get a timing light or an s-afc and watch the rpm vs the tach, and you'll see it reads 'high' the higher the rpm's are.

 

I stopped my most recent speed run at 130, and was still seeing positive .06 g on the Gtech in fouth gear. Level ground, not downhill.

 

You're either lying, or you're retarded. Stop polluting this place with stupidity. Your car does not redline 5th gear, and you sure as **** aren't in 5th gear at the end of the 1/4. Study hall is over, get back to class.

 

ok boys...here is a real simple solution...drive your car in 5th at 2000rpm. Record that speed....then drive it in 5th at 3000rpm...record that speed. Subtract the difference and that is your mph gain per 1000rpm in 5th. Gears are constant and so will be gain be per 1000rpm in 5th gear(works for any gear as long as you figure out your 1000rpm gain in a specific gear) I have the formula for speed in any gear using the circumference of the rear tire and so on and this is almost as accurat...the THEORETICAL top speed of a S5 TII is about 188mph in 5th with stock 16 rims...i have a european speedo and, by law, they are allowed a margin of error (more the faster you go)..i have driven almost 160mph and i know that I was not at 130....use the above rule of thumb to estimate you speed....I think I remember the 1000rpm gain to be around 32mph. So at 4000 I do about 100mph..at 5000rpm I am at 132mph and at 6000rpm I am at 164 and at 7000rpm at about 196(188mph theoretical top speed)the 196 even explains the speedo being off!!
POP Quiz next week!

 

Don't forget your tach isn't very accurate in itself

 

accuracy is irrelevant(almost)...consistency IS...if i am taching at 4000 and am really doing only 3800 and at 5000rpm am really only doing 4800 then the rpm CONSTANT will still give you you the speed at x rpm...

 

But it's not consistent. This is the problem. The higher you are, the more it's off, the lower you are, the more accurate it is. (Same with most speedometers)

 

ok...the we will need to go with the math formula which yields virtualy the same top speed ...this rules out tach variation and speedo variance..188mph THEORETICAL top speed stands..will someone give me the circumference of the rear stock tire in inches....i would do it but I have 18 rims and tires

 

Nobody really argues 'theoretical' the big arguement is what people are actually travelling at when they claim these 150+ on the speedo, and then get so pissy when we point out the speedo's incorrect at that speed, then they try to back it up with RPM (which reads high anyway), which points out that they were moving even slower. But anyway, a s5 tII should be able to hit 140-150ish, depending on weather, location, etc. Much more than that is pushing belief.

 

^^ Which throws off your top speed and gauges even more.

 

i went 87 mph in a 4 door automatic 3cyl geo metro down hill once.

Had to back off b/c my temp guage was rising with my spedo....

does that count for anything

 

With the speedo reading 155 in my GTUs, my GPS read only 137mph, and it just gets more and more off the higher it reads. The funny part is, my speedo is dead on from 0-90, after 90 it just starts reading high.

 

my spedo was dead on at 90 too........

have a ticket to prove it too ;(

 

I once asked a cop if he'd let me zoom by at 140mph to see how far my speedo was off. He wasn't very happy about that.

 

some people just get mad and argue about tach and speedometers being wrong because they can't get their cars past 90...and when they do, the wheels woble so bad that the speedo is way off...and they know this because of some gps devise...and they argue with proven math formulas because they just have to be right because they have a car that has a faulty speedo
BTW..THEORETICAL refers to a speed that could be obtained but is limited due to factors such as the coefficient of drag, HP, etc...i just drove my car and I swear that I was standing still with the car off but the tach was at least at 100rpm and the speedo was at 10mph...what was the gear ratio again for neutral?? "Scotty, I need warp 8 now!" " But sir, are you sure we are going light speed. The light speedometer could be a wee bit off, ye know" ....