Gear Ratios
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Joined: May 2004
Posts: 339
From: Hacienda Heights,CA
Gear Ratios
whats the gear ratios for a stock 91-94 240 coupe? i wonder because i go to like american car forums and other forums like NSXprime and stuff and they all mention changing out gears and stuff for better accel or maybe top speed or just good daily driving. is there anything out there for the 240? maybe if i get enough answers this could be a sticky or something
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Joined: Aug 2003
Posts: 6,587
From: Socal, 909/626
Re: Gear Ratios
Originally posted by Jack The GTR
whats the gear ratios for a stock 91-94 240 coupe? i wonder because i go to like american car forums and other forums like NSXprime and stuff and they all mention changing out gears and stuff for better accel or maybe top speed or just good daily driving. is there anything out there for the 240? maybe if i get enough answers this could be a sticky or something
whats the gear ratios for a stock 91-94 240 coupe? i wonder because i go to like american car forums and other forums like NSXprime and stuff and they all mention changing out gears and stuff for better accel or maybe top speed or just good daily driving. is there anything out there for the 240? maybe if i get enough answers this could be a sticky or something
1st gear: 3.321
2nd gear: 1.902
3rd gear: 1.308
4th gear: 1.000
5th gear: 0.759
Reverse: 3.657
Final Drive: 4.083
S13-S14 4-Sp Auto Ratio's
1st gear: 2.785
2nd gear: 1.545
3rd gear: 1.000
4th gear: 0.694
Reverse: 2.272
Final Drive: 4.083
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Joined: Aug 2003
Posts: 6,587
From: Socal, 909/626
Originally posted by Preston
Raine, how is 4th 1:1? My 91 hatch is 1:1 in 3rd, with a 4th overdrive and a 5 over-overdrive. Just askin, do I have a special car? lol.
Raine, how is 4th 1:1? My 91 hatch is 1:1 in 3rd, with a 4th overdrive and a 5 over-overdrive. Just askin, do I have a special car? lol.
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Joined: Aug 2003
Posts: 6,587
From: Socal, 909/626
Originally posted by Preston
cause the tach and spedo move at the same rate
cause the tach and spedo move at the same rate
That's like adjusting your camber by eyeballing it and saying "yeah... it's at 0 degrees"
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Joined: Dec 2004
Posts: 593
From: Cokeburg, PA
Yes I know that's how it should be, but mine runs 3rd 1:1. The tach moves with the spedo at the same rate. In fourth, the spedo is higher than the tach by a bit, and in 5th by a lot.
I'll try to take a pic sometime if i can get my friend's digital.
I'll try to take a pic sometime if i can get my friend's digital.
Registered User
Joined: Nov 2004
Posts: 276
i2aine is right.
1 to 1 means 1 rotation of driveshaft equals 1 rotation of tire.
It DOESN"T have anthing to to with rpm matching speed. Even if the rpm and speed move EXACTLY the same, that doesn't mean that it is one to one. This is because different cars have different size wheels. Therefor 1 tire rotation for different cars equals different distance traveled. Therefore a 1 to 1 ratio on a truck will make the SPEEDO travel "faster" than the tach. On a car with 10 inch wheels or whatever, the Tach will move "faster" than the speedo for a 1 to 1 ratio.
This is my understanding/idea. It makes perfect sence though.
1 to 1 means 1 rotation of driveshaft equals 1 rotation of tire.
It DOESN"T have anthing to to with rpm matching speed. Even if the rpm and speed move EXACTLY the same, that doesn't mean that it is one to one. This is because different cars have different size wheels. Therefor 1 tire rotation for different cars equals different distance traveled. Therefore a 1 to 1 ratio on a truck will make the SPEEDO travel "faster" than the tach. On a car with 10 inch wheels or whatever, the Tach will move "faster" than the speedo for a 1 to 1 ratio.
This is my understanding/idea. It makes perfect sence though.
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Joined: Sep 2004
Posts: 1,110
From: Dallas
Originally posted by needa240
i2aine is right.
1 to 1 means 1 rotation of driveshaft equals 1 rotation of tire.
It DOESN"T have anthing to to with rpm matching speed. Even if the rpm and speed move EXACTLY the same, that doesn't mean that it is one to one. This is because different cars have different size wheels. Therefor 1 tire rotation for different cars equals different distance traveled. Therefore a 1 to 1 ratio on a truck will make the SPEEDO travel "faster" than the tach. On a car with 10 inch wheels or whatever, the Tach will move "faster" than the speedo for a 1 to 1 ratio.
This is my understanding/idea. It makes perfect sence though.
i2aine is right.
1 to 1 means 1 rotation of driveshaft equals 1 rotation of tire.
It DOESN"T have anthing to to with rpm matching speed. Even if the rpm and speed move EXACTLY the same, that doesn't mean that it is one to one. This is because different cars have different size wheels. Therefor 1 tire rotation for different cars equals different distance traveled. Therefore a 1 to 1 ratio on a truck will make the SPEEDO travel "faster" than the tach. On a car with 10 inch wheels or whatever, the Tach will move "faster" than the speedo for a 1 to 1 ratio.
This is my understanding/idea. It makes perfect sence though.
http://www.miata.net/garage/tirecalc.html
Dont forget that Lseries,naps-z, and KA are all interchangible transmissions as long as you keep the KA bellhousing. You can use a NAPS-z bell housing but there is a bolt missing in the pattern. You need an adapter plate made for the Lseries conversions. If you dont like the gear ratio you have look at the specs of the other transmissions. NISMO also offers a 5th gear ratio for those transmissions.
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