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Speedo out?? 

 

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Molloy
 Post subject: Speedo out??
Posted: Mon Aug 21, 2006 8:23 pm 
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Hey lads will 18inch rims put ur speedo out? its on a EF, if so how much will the speedo be out by? and how do u fix it??

 

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XR6 EF
Posted: Mon Aug 21, 2006 8:26 pm 
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search the docos there is a speedo calculator in there. will tell you excactly how far out it should be.
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Molloy
Posted: Mon Aug 21, 2006 8:27 pm 
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Ahhh thanks

 

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Molloy
Posted: Mon Aug 21, 2006 8:30 pm 
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Ok that tells me how far out it is, but how do you fix it??

 

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Mods going on: Nizpro springs, bosch 040 pump + Walbro gss341, 600cc injectors, PWR transcooler, 20% Underdrives, 15psi Actuator, Kingspring SSL's, 15psi tune.....More coming

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XR6 EF
Posted: Mon Aug 21, 2006 8:31 pm 
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LOL
Don't really know, deal with it i guess unless you play around with different gears could work out.
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daggy082
Posted: Mon Aug 21, 2006 8:46 pm 
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gotta keep the same total diameter of the wheels and tires. Easy.

 

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XR6 EF
Posted: Mon Aug 21, 2006 9:32 pm 
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but 18" even with 40 tyres don't match rolling dia of 15"with 60 tyres.
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daggy082
Posted: Mon Aug 21, 2006 9:41 pm 
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215/45-18's
225/40-18's
235/40-18's
All 1km or less out on speedo but u will never get a total diameter to match excatly. Also im not an expert on tires so im not sure those tire sizes exist.

 

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revhead
Posted: Mon Aug 21, 2006 10:09 pm 
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daggy082 wrote:
215/45-18's
225/40-18's
235/40-18's
All 1km or less out on speedo but u will never get a total diameter to match excatly. Also im not an expert on tires so im not sure those tire sizes exist.

These tyre sizes do indeed exist, most common conversion is 235/40/18 or 245/40/18. Most e-series falcons came out with 205/65/15 tyres and the makers allow for a 15mm difference in tyre diameter, the later e-series falcons had the option of factory 16inch wheels and the 235/40/18 is within the diameter limits

 

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Molloy
Posted: Tue Aug 22, 2006 7:24 am 
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Cool so theres no prob then, thanks lads

 

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Mods going on: Nizpro springs, bosch 040 pump + Walbro gss341, 600cc injectors, PWR transcooler, 20% Underdrives, 15psi Actuator, Kingspring SSL's, 15psi tune.....More coming

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