mcg
|
| posted on 21/11/11 at 07:06 PM |
|
|
Calculating speed on digi dash
Hi - I have a Koso DBR02 speedo unit, and I am in the process of programming it to get the MPH correct.
The inputs I have are:
Number of magnets: 1 (placed on prop shaft)
Circumference of the wheel: 167cm
Now I know that these things are normally for motorbikes, so they make there calculation based on 1 rotation of the magnet eqautes to 1 rotation of
the wheel, but I also know that my diff is rotating the wheels more times than the prop.
The diff is 3.62, so am I right in saying that one turn of the prop shaft gives 3.62 turns of the wheels?
If thats the case, what do I need to adjust to get it reading correctly? I was thinking that I need to multiply the circumference of the wheel by the
diff ratio. So instead of inputing 167cm I should be inputting 604.54cm? Or is it the other way round!!?!?!?
Your help as always is massively appreciated!
Cheers
Matt
|
|
|
|
|
blue2cv
|
| posted on 21/11/11 at 07:22 PM |
|
|
Other way round prop turns faster
|
|
|
russbost
|
| posted on 21/11/11 at 07:44 PM |
|
|
Matt, divide your wheel circumference (normally measured in mm, but don't know for sure with the Koso) by the diff ratio - job done!
[Edited on 21/11/11 by russbost]
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
|
NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
|
mcg
|
| posted on 21/11/11 at 08:50 PM |
|
|
Brill. Thanks alot. Easily sorted then.
Cheers. Matt
|
|
|
