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| Spoondog |
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Hey guys,
im abit stumped right now, ive got a dyno sheet and the bottom axis is in km/h, i need to convert it to rpm but i dont know how too, ive looked everywhere!  im sure there was a thread on this site a while back about how to convert it. With formulas etc..cheers
_________________ R33 GTS-T - 222.6rwkw |
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| Spoondog |
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ok car is EF with 3.08 rear diff, EA manual..
rear tyres are 215/60/R15, total wheel diameter of 25.16 inches so im using these online converters and they say at 6000rpm i should be pulling 145mph! not possible so what have i got wrong? i know so far that at 2k rpm its doing 78km/h this is in 4th gear 1:1 ratio
_________________ R33 GTS-T - 222.6rwkw |
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| skidder |
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KM/H x (1000/60)
This gives your speed in meters per minute. pi x Diameter (in metres) This will give you the cirucumference of your wheel in metres. Speed / Circumference This gives how many rpm of wheel per minute. Then divide by diff ratio if in 4th. I haven't got a calculator but I think that should come close to checking out for your 78km @2000rpm.
_________________ EVL098 wrote: Cramping in the hand from having it on your Wang for an excessive period of time is a definate con. Seriously do people google "f**k up modifications for Fords owned by Jews" and get linked straight to this site nowadays? AU,factory fitted tickford kit/IRS, t5,Sports ryder/KYB: gone. |
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| Spoondog |
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thanks mate, helped so much
 ive just realised that the dyno run only went to 5k rpm when the limiter kicked in at 180, still made 142kw though
_________________ R33 GTS-T - 222.6rwkw |
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| EF-MattyB |
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When i had my old EF, it had the 3.08 diff, ED t5 and an xr6 manual ecu. So the rev limit kicked in at 5750rpm with no speed limiter. I saw it go off the clock to around 240kmh before it hit the rev limiter. (Dyno run was done in 4th gear of course)
Just something to go off.
_________________ 99 AU Fairlane Ghia V8 Black Leather, 19" ANZ 5+5's with 245/35 rubber |
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