crshbndct 0 Report post Posted June 9, 2010 so my speedo i reading a bit high. when it says 60kmh i am doing 48.. when it says 110, i get passed by trucks. and it feels like i am going very slow. however with the tolerance being put down to 5kmh for the holiday weekend, i didnt want to risk going much faster. its a bloody pain having no idea what speed your doing. it only seems accurate to within about 10-20kmh. car is a 1988 320i(pre facelift) with a 3.91 diff. not sure what gearbox is in it, but would guess getrag 240? so whats the deal? Quote Share this post Link to post Share on other sites
Forrest 35 Report post Posted June 9, 2010 What wheel size + tyre size are you running Quote Share this post Link to post Share on other sites
greenday-rulz21 6 Report post Posted June 9, 2010 ^^ Pretty much what it will most likely come down to. E30 speedos are also notoriously inaccurate. Quote Share this post Link to post Share on other sites
e30ftw 410 Report post Posted June 9, 2010 Mine is exactly the same. 60kmh is 48kmh (according to those speed boxes that show your speed). Understandable though as I am running 205/40/16's which has a smaller rolling diameter than stock. If your using the right tyre size your speedo is probably just farked.. Quote Share this post Link to post Share on other sites
crshbndct 0 Report post Posted June 9, 2010 stock bottle caps with 195/60/14 Quote Share this post Link to post Share on other sites
my_e36 43 Report post Posted June 9, 2010 Isn't there some place that you can put on a rolling road to have that verified? If you are actually doing 48km while indicated 60, you will never done for speeding for sure! Quote Share this post Link to post Share on other sites
Shady 0 Report post Posted June 14, 2010 Mine says 60 is 57 so mine is only 3ks out Quote Share this post Link to post Share on other sites
cliffdunedin 8 Report post Posted June 14, 2010 The older magnetic speedo's tend to weaken over time, what could be your problem! If i were you i'd borrow a gps off someone and then measure yourself on a straight flat road at 100kmh, then adjust your speed accordingly...those signs that say how fast you are going are ok but again can be out by a few kms or replace/check speedo/cable etc Quote Share this post Link to post Share on other sites
JiB 0 Report post Posted June 14, 2010 stock bottle caps with 195/60/14 Am pretty sure that's the wrong size, that's a 316/318 size. Pretty sure all 6 cyl's run 195/65r14. Quote Share this post Link to post Share on other sites