DannyboyDS
Just hand me the pliers.
- Joined
- Feb 26, 2007
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- Age
- 39
- Location
- Melbourne
- Members Ride
- VS Berlina
Ok so im converting to manual in my VS, I have a remapped ECU, but of course as eveeryone knows I miss out on the Vehicle Speed Sender, as the standard VS auto ECU uses Pulse Width Modulation (PWM) and the T5 I am using uses an oldschool analog signal, like high or low voltage.
So after considering all of the possibilities, such as.
1. Locate and use the correct ECU (To expensive and ahrd to track down)
2. An off the shelf converter (Could only find them in 8 pulse, I need a 40 pulse)
3. go without (Is problematic
4. changing over to a completly different ECU (Can be expensive and allot of mucking around that can result in everything not working)
So in the end ive decided on this as my project.
The picture below is a little rough and ready but hey, I did my best.
Basically the shaft of the old VSS goes through a bearing (for support) and into a plastic hobby box (Trying to reduce the amount of magnetic metal as not to affect the PWM generator.
the PWM generator has to be placed correclt alignment and distance from the reluctor ring are crucial, I have the figures somewhere, otherwise, back to google I will go
finally it also comes down to the gearing, need to get 40 pulses per driveshaft revelution for it to work straight off, otherwise a speedo corrector kit will be needed.
Anyone got any thoughts? any info? anyone allready done it? or is anyone good enough with circuits to make a PWM generator that increases pulses dependant on input voltage?
Better yet anyone seen a 40 pulse PWM generator on the net for sale, they basically replace the old VSS, plug right in, as the cogs turn it creates a PWM signal.
So after considering all of the possibilities, such as.
1. Locate and use the correct ECU (To expensive and ahrd to track down)
2. An off the shelf converter (Could only find them in 8 pulse, I need a 40 pulse)
3. go without (Is problematic
4. changing over to a completly different ECU (Can be expensive and allot of mucking around that can result in everything not working)
So in the end ive decided on this as my project.
The picture below is a little rough and ready but hey, I did my best.
Basically the shaft of the old VSS goes through a bearing (for support) and into a plastic hobby box (Trying to reduce the amount of magnetic metal as not to affect the PWM generator.
the PWM generator has to be placed correclt alignment and distance from the reluctor ring are crucial, I have the figures somewhere, otherwise, back to google I will go
finally it also comes down to the gearing, need to get 40 pulses per driveshaft revelution for it to work straight off, otherwise a speedo corrector kit will be needed.
Anyone got any thoughts? any info? anyone allready done it? or is anyone good enough with circuits to make a PWM generator that increases pulses dependant on input voltage?
Better yet anyone seen a 40 pulse PWM generator on the net for sale, they basically replace the old VSS, plug right in, as the cogs turn it creates a PWM signal.