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What rpm do you run on highway?

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Old 08-15-2014, 11:04 AM
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What rpm do you run on highway?
I usually go 5th gear for around or above 120km/h, often 4th too, rpm usually 4,5k, you think is healthy? Constant Cruising speed of course.
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Old 08-15-2014, 11:26 AM
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Cruising at 55 mph or higher I'm in 6th. RPM depends on how much higher.

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Old 08-15-2014, 11:36 AM
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80mph in 6th is 4k on my car
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Old 08-15-2014, 12:34 PM
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Originally Posted by 200.mph
80mph in 6th is 4k on my car
how? i am running at about 6k at 60mph
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Old 08-15-2014, 12:38 PM
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Originally Posted by Jay719
how? i am running at about 6k at 60mph
what gear? s1 8? my car is a 6port m/t s1 and 80mph is 4k rpm
Last edited by 200.mph; 08-15-2014 at 12:44 PM.
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Old 08-15-2014, 12:49 PM
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mine is an s1 and i am running that in 6th gear....
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Old 08-15-2014, 01:13 PM
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Mine is right in line with 200 but i try to keep it over 5k
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Old 08-15-2014, 01:17 PM
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**** i wish i could do 80mph at only 4k rpm in 6th!
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Old 08-15-2014, 01:58 PM
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did you swap the trans or rear?
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Old 08-15-2014, 02:07 PM
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no... maybe it might have been closer to 5k but it still wouldnt make sense.
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Old 08-15-2014, 04:41 PM
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Just checked, 80 in 6th at exactly 4k...
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Old 08-15-2014, 11:46 PM
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Mine hits 80mph in 6th gear at 4k as well, although it's not exactly in the center of the 4k marker but more like in the upper half of it yet not passing it.
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Old 08-16-2014, 12:51 AM
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i will have to double check min but 80 in 6th gear i swear it was at or around 5k
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Old 08-17-2014, 11:35 AM
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Are your tires the exact same diameter as stock?
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Old 08-17-2014, 11:57 AM
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they are 225/45ZR18
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Old 08-17-2014, 12:35 PM
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That's the stock tire size. Sounds like you were in 5th rather than 6th.

Rpm vs gear vs speed is pretty tidy on the manual transmission 8. At 3000 rpm, the speed in gears 2,3,4,5,6 is 20,30,40,50,60 mph.

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Old 08-17-2014, 01:00 PM
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Tire size is not going to matter if you use the speedo on the car.

Engine is connected to trans, trans is connected to rear end, speed comes off the ABS sensors on the rear end. It should match no matter what the ken^^ post.

At track, I have 225/45 17s, it matches. On street I have 225/50/18s.

the rpm to mph stays the same. 6K at 60 sounds like 4th gear, not 6th.
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Old 08-17-2014, 02:27 PM
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4.5k at 130km/h
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Old 08-17-2014, 04:14 PM
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Ahh op probably has jdm 5 speed not us 6 speed.
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Old 08-17-2014, 05:15 PM
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4k 120km/h, 4.5 130km/h if I remember correctly.
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Old 08-17-2014, 05:25 PM
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3500rpm in 5th sounds healthy (less engine heat) and better gas mileage?
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Old 08-17-2014, 06:04 PM
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Dooh, sorry..

75 mph, or 120 kph, is right about 4,500 for 5th gear. sorry, I read too many posts at the same time, thx logal.
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Old 08-18-2014, 08:59 AM
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6th gear
Attached Thumbnails What rpm do you run on highway?-speedo.jpg  
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Old 08-18-2014, 10:13 AM
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Unless you are like me, in which case 90 mph = 3,000 RPM = ~24 mpg's.
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Old 08-18-2014, 10:19 AM
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isnt your car an autotragic waiting?
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