Paul, It depends on how much your speedo is out and if your happy to make the adjustment when driving, also whether you are going to change to the correct size in the future and if you decide to change it then the availability of the correct pinion drive or the cost of a good instruments business to correct it.
The 3100 @ 100 kph I quoted for you was in 4th gear (1:1) and with a 0.85:1 5th gear this would be ~2650 rpm. 3100 in 4th @ 100 kph isn't what I'd call high for an '80's model 2L, most street driven 1600/180B with a 3.7 to 4.1 diff are geared lower than that, mainly due to tyre sizes used (~875 - 900 revs/per/mile, eg 195/60x14, 195/55x15 etc) and they spin at ~3500 rpm in 4th and 3000 rpm in 5th @ 100 kph. Later model 2L cars with EFI and fairly good power to weight ratios spin at ~500 rpm lower than this, it's the same for the family sized 6 cyl, an auto Falcodore engine spins only at around 2000-2200 rpm at 100 kph in overdrive. They have very steep overdrive gears ~0.7:1, and good power/weight and it results in reasonable economy on the highway. regards Terry -----Original Message----- From: [EMAIL PROTECTED] [mailto:membersozdat_owner@;datascribe.com.au]On Behalf Of Paul Stanley Sent: Tuesday, 5 November 2002 7:46 AM To: [EMAIL PROTECTED] Subject: Re: TRX rims So I shouldn't be paying much attention to my speedo. Doesn't 3100 seem a bit high for a 2L 4cyl? Or was that only the 4 speed? What would the revs be with a 5 speed box? From: Paul Stanley [EMAIL PROTECTED] ----- Original Message ----- From: Terry Rudd <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, November 01, 2002 10:40 PM Subject: RE: TRX rims > Paul, > > A couple of comments. 3100 is 100 kph with your tyres and a 3.7 diff, you > may actually have a 3.7 especially if it's a Borg Warner. You can't go by > the hand book with them as there was a lot of industrial trouble thru the > 200b/S1 Bluey runs at Albury (ever heard of Neville Wran?) and Nissan > sometimes stuck whatever diffs they had built it them. You got things like a > 3.7 diff in S1 Bluey with 5 speeds like my cousin did when the handbook says > it should have a 3.9. > > The stock speedo has a built in error, up to around 4% which is just about > the difference made by your larger tyres. Also, you don't know what speedo > drive is in the box, could be it's already a 6x19. The only way to know for > sure is to drive it to Melbourne as at Wodonga there is a radar speed > indicator on the Hume Highway - great invention that although it only goes > up to 117 kph (bummer). They say it's there so the cops in Vic can book you > for a much smaller tolerance than in New South, getting booked for 116kph > and the like is not uncommon on the Hume in Vic and on the NSW side they > don't even seem to notice you unless double demerit is in force to well over > 120kph. > > regards > Terry --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/membersozdat@;datascribe.com.au/ ---------------------------------------------------------------------
