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Highway RMP
https://www.ausmini.com/forums/viewtopic.php?f=2&t=72613		 Page 1 of 2
Author:  bill.b [ Tue Aug 23, 2011 7:42 pm ]
Post subject:  Highway RMP
I was just wondering what RPM people were sitting on for around 100-110km/h. Just thinking about taking my car on a bit of a trip however I'm not sure if sitting on around 3800-3900 (Mini K 3.66 diff) for extended periods of time is such a good idea? Any thoughts, is this ok? I'm talking about 3-4 hours highway trip. Seems to sing along quite nicely.

Cheers,

Bill
Author:  drmini in aust [ Tue Aug 23, 2011 7:54 pm ]
Post subject: 
It won't hurt it.
I regularly drove Barney on freeways (and did 2000km around Tassie) with a 3.64 diff.
I have a 3.64 in my 1360 also, never had a problem.
Author:  bnicho [ Tue Aug 23, 2011 8:46 pm ]
Post subject: 
Sompe people like really tall diffs (2.95) for relaxed highway cruising. Some masochists like really low diffs (4.12) for screaming acceleration and don't give a hoot about highway revs. Most people choose something in between.

All choices are a compromise unless you buy a five speed box with overdrive. If what you have works for you, stick with it.

Cheers,
Author:  d1ck0 [ Tue Aug 23, 2011 9:00 pm ]
Post subject: 
Here's an RMP on a highway :lol:

Image

Uploaded with ImageShack.us

Dicko.
Author:  CPOCSM [ Tue Aug 23, 2011 10:21 pm ]
Post subject: 
3950rpm(3.44 diff) gives me just over 100kph on the highway in the 1018cc engine. I find once it is here, the small bores are singing and accellerates beautifully when you want to overtake.
Author:  1071 S [ Tue Aug 23, 2011 10:23 pm ]
Post subject: 
Way back when I did a few trips to FNQ from the NSW south coast in my 850. Of course we couldn't afford tachos in those days (not even a temp gauge) but the old (well it was only 3 years old then) would happily sit on 60-65 mph for 3 days..... - each way. The only time it was actually flat out was when you came to a hill... any hill.

These days the 1330 is happy to pull 4k to Melbourne and back...

Cheers, Ian
Author:  bill.b [ Tue Aug 23, 2011 10:29 pm ]
Post subject: 
4k :P awesome news, pack the spares off we go.
Author:  Molina [ Tue Aug 23, 2011 10:37 pm ]
Post subject: 
If i do approximately 3400rpm at 100km/h with 12" wheels (165 60 12 tyres) what diff ratio would that mean i have?
Author:  NG [ Tue Aug 23, 2011 10:42 pm ]
Post subject: 
Molina wrote:
If i do approximately 3400rpm at 100km/h with 12" wheels (165 60 12 tyres) what diff ratio would that mean i have?


3.1 i reckon. same as me.
Author:  mattsmadmini [ Wed Aug 24, 2011 12:45 am ]
Post subject: 
3.7 diff at 100km is around 4100-4200rpm my 1100 dont mind it at all
Author:  bnicho [ Wed Aug 24, 2011 9:13 am ]
Post subject: 
Assuming 165/70R10 tyre

RPM's at 100kph as follows:

2.75 = 3008
2.95 = 3226
3.1 = 3390
3.2 = 3500
3.44 = 3762
3.64 = 3982
3.76 = 4112
3.93 = 4299

Whay you also have to look at is revs at 120kph, as realistically you will want to reach 120 when overtaking on occasion. (Not me, I never speed. :lol:)

Cheers,
Author:  Darrell [ Wed Aug 24, 2011 10:15 am ]
Post subject: 
Anybody got any tricks to reduce cabin noise at these speeds, I'm getting soft in my old age, I don't remember the Mini been noisy in the 60,s even at 80 + mph must of been the "testosterone"
Author:  Clutch-monkey [ Wed Aug 24, 2011 10:35 am ]
Post subject: 
Darrell wrote:
Anybody got any tricks to reduce cabin noise at these speeds, I'm getting soft in my old age, I don't remember the Mini been noisy in the 60,s even at 80 + mph must of been the "testosterone"

dynamat?
Author:  drmini in aust [ Wed Aug 24, 2011 10:43 am ]
Post subject: 
Wear earplugs, and turn the CD up. 8)
Author:  Wombat [ Wed Aug 24, 2011 12:48 pm ]
Post subject: 
Noise cancelling earmuffs
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