Homer Posted August 6, 2010 Share Posted August 6, 2010 I've put together an Excel file which shows the effect of fitting various sized diff and gearboxes to the supra, it also contains a graphical chart showing the effect different tyre & wheel sizes and offsets effect both fitment to the hub and the effect on speed/acceleration. There are two main sheets on the file, Wheel size fitment and gear ratio calculator. I forgot to sticky this back when it was created last year, there's no updates to the calculator since the old threadSupra Gear & wheel size Calculations.xls Quote Link to comment Share on other sites More sharing options...
hackin_n_bashin Posted August 7, 2010 Share Posted August 7, 2010 Homer, That is awesome! Quote Link to comment Share on other sites More sharing options...
Terminator Posted August 9, 2010 Share Posted August 9, 2010 Thanks for all your efforts putting this together. Brilliant and very useful. Quote Link to comment Share on other sites More sharing options...
Fitz Posted August 10, 2010 Share Posted August 10, 2010 Cheers Darryl, again another helpful resource for the club Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 26, 2010 Share Posted September 26, 2010 I cant get this to work on my laptop for some reason, doing my research for thunder road, can somebody put my details in and post a screen shot please, trying to work out my in gear speeds. V160 and large TT6 diff 8200rpm limit 345/30/19 rear tyres. Quote Link to comment Share on other sites More sharing options...
Graham S Posted September 26, 2010 Share Posted September 26, 2010 I cant get this to work on my laptop for some reason, doing my research for thunder road, can somebody put my details in and post a screen shot please, trying to work out my in gear speeds. V160 and large TT6 diff 8200rpm limit 345/30/19 rear tyres. 8200 rev limit will do 255.52mph mate! 5th gear should see 202! how do i do a screen shot? Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 26, 2010 Share Posted September 26, 2010 Any idea what it will do in the other gears mate? Quote Link to comment Share on other sites More sharing options...
Graham S Posted September 26, 2010 Share Posted September 26, 2010 sorry edited after you replied! Quote Link to comment Share on other sites More sharing options...
Homer Posted September 26, 2010 Author Share Posted September 26, 2010 I cant get this to work on my laptop for some reason, doing my research for thunder road, can somebody put my details in and post a screen shot please, trying to work out my in gear speeds. V160 and large TT6 diff 8200rpm limit 345/30/19 rear tyres. Here it is mate, still saved from when you called the other week Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 26, 2010 Share Posted September 26, 2010 Top man, thats what i wanted to see:) Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 26, 2010 Share Posted September 26, 2010 Im tempted to take my 28" tall drag wheels with me an all, they might get me a better speed in 5th all though i might be worring about nothing, watching my old TR video it seemed to pull 6th gear ok. Quote Link to comment Share on other sites More sharing options...
Homer Posted September 26, 2010 Author Share Posted September 26, 2010 No worries, still chasing that 200? BTW, 200mph is 8095rpm in 5th on the 345's Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 26, 2010 Share Posted September 26, 2010 No worries, still chasing that 200? BTW, 200mph is 8095rpm in 5th on the 345's I got to beat 202mph standing mile to be the fastest supra in europe. Quote Link to comment Share on other sites More sharing options...
Homer Posted September 26, 2010 Author Share Posted September 26, 2010 I got to beat 202mph standing mile to be the fastest supra in europe. Oh, the bar has been raised again then! IIRC the 28 in wheels gave a good few mph more, about 207 in 5th? If you have the sizes I can post a plot with that, if you don't have the sizes I can work it out assuming they are exactly 28in tall. Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 26, 2010 Share Posted September 26, 2010 Oh, the bar has been raised again then! IIRC the 28 in wheels gave a good few mph more, about 207 in 5th? If you have the sizes I can post a plot with that, if you don't have the sizes I can work it out assuming they are exactly 28in tall. Krister holds the record at the min. They are 325/50/15 not sure 200mph on ET street radials is a good idea though. Quote Link to comment Share on other sites More sharing options...
Homer Posted September 26, 2010 Author Share Posted September 26, 2010 For reference, 325/50/15: Quote Link to comment Share on other sites More sharing options...
JamieP Posted September 26, 2010 Share Posted September 26, 2010 Thanks for that. Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 6, 2010 Share Posted October 6, 2010 Sorry to be a pest mate, i just got some new 18" Oz racing wheels and the rear tyres are avon 320/70/18 they measure 27.5" or 698mm, fancy working out the gearing for them? Quote Link to comment Share on other sites More sharing options...
johnny g Posted October 6, 2010 Share Posted October 6, 2010 I get it somewhere near: 214.42mph and 258.57mph, using 27.5" diameter. Is 320/70/18 right? Using that in there, you get: 278.14mph and 335.40mph!!! Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 6, 2010 Share Posted October 6, 2010 Lol, thats what it says on the tyre, they measure 27.5", they are bloody huge. Quote Link to comment Share on other sites More sharing options...
dr_jekyll Posted October 6, 2010 Share Posted October 6, 2010 edit im talking crap Quote Link to comment Share on other sites More sharing options...
Homer Posted October 6, 2010 Author Share Posted October 6, 2010 Lol, you'll break 200mph in 4th with those on For info, the full plot is attached Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 6, 2010 Share Posted October 6, 2010 Blimey, might be to big then, gears will be so long. I dont know if the sizes are different on race tyres? they measure 27.5" though. Quote Link to comment Share on other sites More sharing options...
Homer Posted October 6, 2010 Author Share Posted October 6, 2010 Are you sure the sizes are right Jamie? 320/70/18 is 35.64 inches diameter according to my info. Quote Link to comment Share on other sites More sharing options...
JamieP Posted October 6, 2010 Share Posted October 6, 2010 Are you sure the sizes are right Jamie? 320/70/18 is 35.64 inches diameter according to my info. Sorry just looked again, it says 320/705/18 whatever that means, they do measure 27.5" though. Quote Link to comment Share on other sites More sharing options...
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