M K

iTrader: (9)

ok i have had 2 goes now and getting the speedo to read correctly and im having no luck

1st try was a jubilee clip around the cv joint that goes into the gearbox, the led came on everytime the clip head passed the sensor but the reading was intermitent and never went above 8mph on the test drive.

so today i used a jubilee clip to one side of the cv joint to hold to it a 10mm thick section of metal rod which is also magnectic so once again the led came on when the rod passes the sensor so all is good but on the test drive it still only reads between zero and 14mph very intermitently at that

as im using the driveshaft it states to use the following calculations to work out your calibration inputs -

IF THE SENSOR IS MOUNTED ON A DRIVESHAFT OR PROP SET THE CIRCUMFERENCE TO -

actual wheel circumference '/. diff ratio

NOTE - if the resulting value is lesss than 500mm then double this vlue and the pulses per revolution to make it as accurate as possible.

my tyre circumference is - 1745

my rst diff ratio is - 3.82

so 1745 '/. 3.82 = 456.806

no of pulses per revolution is 1

SO

double them values

is 912mm circumference

and 2 pulses per revolution

but the reading is non exsistent/innacurate/very slow changing etc

can you see anything im doing wrong as im lost,

will phone stack tommorow if you have no idea's


also when my gate rpm is set to 3000 my low oil pressure warning still comes on at tickover even tho they shouldnt till above the 3000rpm set gate should they? low pressure warning is set at 25psi but i see abou 18 - 20 psi when hot at idle so the warning is always on

cheers
marc

Mike Rainbird

iTrader: (3)

As per PM .

JonnyBravo

Any chance you could let me know too please ?

I've never been able to get them right and I have to sort mine out shorlty.

M K

iTrader: (9)

what is the sampling rte of the stack speedo when its working as my spa was very quick changing/reading when accelerating/decelerating

Bomber

Marc - can you not just use an EFi Speed sensor which screws into the speedo output on a BC/IB5 box?

M K

iTrader: (9)

i dont think so mate,

tommorow il go maplins i think a get some magnets to use as the pulses il put 4 on the drive shaft at 12-3-6-9 0'clock then re make the bracket out of stainless or similar and give that a go

Bomber

The Apexi AVCR accepts the pulses from the EFi speed sensor - so i would imagine the stack would do the same.

Mounting it on a driveshaft would not be my first choice it seems a bit of a blue peter setup.

M K

iTrader: (9)

turns out the stack instructions are WRONG

if mounting the magnets for the pusles on the drive shaft you just enter the wheel circumference and the number of pulses on the shaft and its perfect,

there is no need for dividing by diff ratio's as it says in the manual


BOMBER - i had the same driveshaft set up on my old spa digital speedo and it was accurate within 0.3mph up to 150mph compared to PF datron timing gear so its far from blue peter