Chris,
185/65R14 do 915 revs per mile, which will increase the revs over stock by
~2.5% which surprised me too - they're virtually do the same rpm as
195/50R15 so the mph/1000rpm/4th gear = 17.7 or 28.5 kph. A genuine 60mph is
~3400 rpm or 100 kph is 3500 rpm with a 3.7:1 diff ratio.
Some other data for popular tyre sizes & diff ratios for comparison:
Size rpm 3.54 3.70 3.90 4.11
(mph/1000rpm in 4th 1:1)
165SR13 886 19.1 18.3 17.4 16.5
185/70R13 898 18.9 18.1 17.1 16.3
195/60R14 894 19.0 18.1 17.2 16.3
195/50R15 918 18.5 17.7 16.8 15.9
regards
Terry
-----Original Message-----
From: Chris Halpin [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, 27 June 2000 8:46 AM
To: [EMAIL PROTECTED]
Subject: RE: how fast can a stocker go?
thanks terry - I'm running 185/65/14's at the moment, so that should drop
the revs slightly, so I am just wondering what my diff could be (just bought
the car not long ago, and was planning on changing to the 240K diff I have)
- maybe the diff I have in it is a different ratio, so I'll find out in the
next few weeks when I get some time - thanks for tin info anyway - chris
>From: "Terry & Heather" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Subject: RE: how fast can a stocker go?
>Date: Sun, 25 Jun 2000 23:46:12 +1000
>
>Chris,
>As you are on "Hotmail" I couldn't send you the gearing spreadsheet so I'll
>post the numbers here. If you want another tyre size let me know. Anytime
>you want to know gearing specs there are three bits of info you need to be
>accurate.
>
>tyre 165SR x 13
>diff 3.7:1
>4th 1.000:1
>
>80 kph 2700 rpm
>100 kph 3400 rpm
>110 kph 3700 rpm
>120 kph 4100 rpm
>
>133 kph 4500 rpm
>147 kph 5000 rpm
>162 kph 5500 rpm * 100 mph
>177 kph 6000 rpm
>
>
>Terry
>
>-----Original Message-----
>From: Chris Halpin [mailto:[EMAIL PROTECTED]]
>Sent: Monday, 26 June 2000 9:09 AM
>To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
>Subject: how fast can a stocker go?
>
>
>I just got back from Sorrento (about an hour and 1/4 drive from Melbourne),
>and had to thrash my engine just to keep up with traffic!!! I have the
>stock dying L18, but a stock 4speed trans and diff, yet doing about 100 to
>105KPH, the revs sounded sooooooooo bloody high. When I got out of the car
>back at home, I couldn't hear anything that my mum said to me - I'd gone
>deff because of a 1 hour drive!! Bastard car - I was just wondering how
>many little rev-lings my motor should be doing sitting on flat terain at
>100kph (about 60mph) with no wind, and a stock g/box, diff, and
>approximately the same (maybe even slightly bigger than stock) tyre
>diameter.
>
>chris 'give me a fifth..sixth..even a seventh gear' halpin.
>________________________________________________________________________
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