If I remember correctly, I think I saw something on the back of the speedo indicating the standard 1000 revs per mile. So the odd ration must have had to do with the Delorean's selected front tire size. If I take a mile (5280ft) and divide by 1000, a 1:1 ratio wheel would have to cover 5.28 feet per revolution. A 5.28 foot circumference wheel would be (5.28/3.14*12) = 20.18" tall The actual wheel on the Delorean is (195/25.4*.6*2)+14" = 23.21" tall If we use the 8:9 ratio angle drive, it makes the 23.21 inch tire act like a (23.21*8/9) = 20.63" tire. (pretty close) Steve VIN 2650 ("Project Delorean") www.projectdelorean.com ________________________________ From: Tom Tait <TTait@xxxxxxxxxx> To: dmcnews@xxxxxxxxxxxxxxx Sent: Wednesday, March 18, 2009 12:17:02 PM Subject: RE: [DML] Angle Drive Which raises the question, why 8:9? Did they get a great deal on discount speedometers? Complicated is better...? From: dmcnews@yahoogroups .com [mailto:dmcnews@yahoogroups .com] On Behalf Of Martin Gutkowski Sent: Monday, March 16, 2009 8:41 AM To: dmcnews@yahoogroups .com Subject: Re: [DML] Angle Drive Convetion dictates probably clockwise... . which is the direction a left wheel rotates, as viewed from the inside. This would also work with bevel gears, but this can't be done on the DeLorean because of the requirement to have an 8:9 ratio in a single stage, hence the use of screw gears etc etc etc. Martin Steve Stankiewicz wrote: > I'd like to know what direction their turning in the other applications. > Steve > > > VIN 2650 ("Project Delorean") > www.projectdelorean .com > [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] ------------------------------------ To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/