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Browsing this Thread:   1 Anonymous Users





DattoFrog
Re: RPM to Speed Ratio
#7
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Thanks All great help

Posted on: 2009/5/20 5:04
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Cheers Peter.
nos4datsuns@bigpond.com
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racetech
Re: RPM to Speed Ratio
#6
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The best Gear Calculation tool I have found to date.
http://race-tech.co.za/wp-content/uploads/2009/04/gearcalc.zip
goto Tools/Ratios/Nissan

Posted on: 2009/5/19 14:18
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revhead001
Re: RPM to Speed Ratio
#5
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4th gear is still 1:1.

Use a mates sat nav. It's the safest way.

Posted on: 2009/5/19 12:21
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Mawler1
Re: RPM to Speed Ratio
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depends if you have a F4W56A or a F4W60L gearbox as the 60L was designed to be put behind A14's and A15's and the ratios are different...

Posted on: 2009/5/19 12:10
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dattodude
Re: RPM to Speed Ratio
#3
No life (a.k.a. DattoMaster)
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So: Doing some google magic..

http://hondaswap.com/reference-materi ... ranny-speed-vs-mph-28672/
We find 185/70-13 tyres are 23.1 inches.

I'll assume the 120Y diff is the standard Datsun 3.9:1

Now lets convert KMs to miles for the calculator:
http://www.teaching-english-in-japan.net/conversion/kilometers

Speed to RPM in 4th gear
-----------------------
60 kmh = 37.28 mph = 2114.79 RPM
80 kmh = 49.71 mph = 2819.91 RPM
100 kmh = 62.14 mph = 3525.03 RPM

Hope this helps.

Posted on: 2009/5/19 11:53
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Sumith
Re: RPM to Speed Ratio
#2
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Hi DattoFrog

It depends on your driving habits and the area you are driving

thanks
regards
sumith

Posted on: 2009/5/19 11:10
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DattoFrog
RPM to Speed Ratio
#1
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My speedo is not reeding right. I am running with a std 4spd box, std H150 diff ex 120y sedan and 185/70-13 bags.
Coulld some give me an idea at what rpm I would be doing 60, 80 and 100 Kph please.

Posted on: 2009/5/19 1:08
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Cheers Peter.
nos4datsuns@bigpond.com
peter.maxsted@bigpond.com
0427 138 266
THIS YEARS RIDES & PROJECTS:
Tweaked 2009 AURION SV6(Daily)
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