i've had my car now for about three weeks and i'm still under 600 miles. i was wondering what the top speed is in every gear at redline and how many rpms do we have to play with until the limiter kicks in? my celica showed a 7800rpm redline but would cut off at 8400.

 

only one way to find out ...wait for the remaining miles

 

Final drive or transfer
ratio (if applicable):
(click on graph for a larger version)
Axle ratio
(if applicable):
Engine max
speed (RPM):
Tire size
(ie. 255/40/17):
1st gear: Total gearing in first gear:
Maximum speed in first gear: 15.4914318
36.9 mph
2nd gear: Total gearing in second gear:
Maximum speed in second gear: 10.111707
56.5 mph
3rd gear: Total gearing in third gear:
Maximum speed in third gear: 7.3229526
78 mph
4th gear: Total gearing in fourth gear:
Maximum speed in fourth gear: 5.7406806
99.5 mph
5th gear: Total gearing in fifth gear:
Maximum speed in fifth gear: 4.6627578
122.5 mph
6th gear: Total gearing in sixth gear:
Maximum speed in sixth gear: 3.782619
151 mph
7th gear: Total gearing in seventh gear:
Maximum speed in seventh gear:
Reverse gear:
(will not be graphed) Total gearing in reverse gear:
Maximum speed in reverse gear: 13.84488
41.2 mp


Credit: turnzero gear cal.

 

You shoulda just posted it here and next time he has a question along these lines, he can figure it out for himself.

http://www.turnzero.com/technical_resource...gear_calculator

 

that can't be right! 151mph top speed. AP1 doesn't hit the rev limiter until about 165-170mph.....

 

It's right. Go to the AP1 chart and knock off 1000 rpm off the top and see what you get.

 

Remember that fuel cut is actually around 8200rpms for the AP2, and that calculator sets up the "stock" setting redline at 8000rpms. The only reason I point this out is that I've trapped 101.98mph in a stock AP2 at a drag strip and I never shifted out of 4th gear before I crossed the line. According to that calculator, my 4th gear should be topping out at 99.5mph at redline.

But yeah, that calculator is a good tool to use, especially when you want to see what effect changing your final drive gear will have on your max speed in each gear.

 

I'm not going to argue with math and science being as I'm an engineer, but my real world experience says those figures are low by about 1-2 mph in each gear. It's not much to make a fuss over, but since no one with an AP2 has chimed in I thought I'd bite on it.

 

I hear what you are saying about lopping off 1000rpm, but isn't there something different?

I can't imagine any car made redlining in top gear at only 151mph......hell, the car actually has the power to get to 151mph so it came from the factory "top speed limited due to gearing"??

Has anyone run their S2000 on the dyno in 6th just to see what the top speed would be?

 

In the "real" world, our speedometers have a slight lag. Unless you are willing to hold redline for a second or two, the speedo won't quite catch up to what the real speed is. Also, in the real world, our speedos have between 1% to 2% error.