Thread: Jaycar speedo corrector does not work confirmation!

I've seen info on the Jaycar speedo corrector on these pages saying that it doesn't work, and posting this info to confirm this situation.
(hopefully saves other folks from 'wasting money').

So brother bought one, thinking that it'll fix his speedo too.
Won't learn!
I try to give him advice, that I myself read mainly on this site .. but he don't listen.
Anyhow, he bought one, I thought we may as well give it a try, I searched the Jaycar website, and they claim this is "the new improved version".
Info on the Jaycar SCU on here was much older than their claim to new model .. naturally it made more sense to try it and see what happens.

First run, nothing worked!
DOH! moment. I forgot to plug in the multiplug back into the SLABS ECU!
So now with that geriatric moment behind me, the Jaycar unit worked as described in the info sheet!
Beauty we both thought. Drove it for a couple of mins(they say a minute), red LED flashed .. connected(or switched) some rheostat and some jumper pins, finally speedo jumped up to an indicated speed!

OK! .. it's actually working (or so we thought).
The issue is not that it doesn't work, it kind'a works, the main issue is a huge delay in it's sending a signal to the speedo.

So when you first move off from rest, there's about a 5-10 sec delay to when the speedo actually indicates any speed.
Accelerating fast or slow has little bearing on this .. the delay seemed to be random, sometimes longer than other times.

I don't think this would be a problem in reality, but the actual problem is when you come to a stop!
The delay in the speedo dropping to zero is very very long .. minutes .. if at all!
That is, you come to a stop(say at lights or intersection) and it still indicates usually 40k/h.
At 40k/h while at rest also means you're adding klms to the odo/trip meter too.
We mucked about with all the jumpers and settings, but nothing would eliminate the delay issue.

So it just doesn't work properly!
It does work .. so long as you don't ever stop.
We set his down by 10%, GPS to help estimate speed, just drove around the streets, no faster freeway/highway speeds, but it did do the job of correcting the speedo .. just the delay makes it unusuable for most applications.
If you only ever drive on the highway/freeway and stopped the car as soon as you pulled up, no worries .. it'll work.

summary: the Jaycar unit(at $40!) is 99.9% of the way there to sort speedo correction issues out on a D2.
recommendation: don't do it!

Hopefully now, bro will get the hunterdi C6100 unit, and this will be sorted for him.

Originally Posted by rangieman

WTF Really FFS

It Amazes what some people do when they think they can save some coin and it back fires on them
Save some face

I am good at saving a dollar or three. Spent a dollar or two at the Dollar Tree. (California, just bragging) Some times you have to bite the bullet and pony up the cash. For example, Genuine TD5 engine mounts, Genuine TD5 Header tanks. TD5 OEM GM radiators. I find as a rule of thumb, that Roverlord will sell the good stuff and avoid the dodgy gear. And if he avoids an item, it is because people will not pony up the cash for the genuine. So buy the genuine.
You pays your money and you makes your choice.
I am replacing the thermostat when I replace the radiator, (When I get around to it) I'm not fussed at the cost of the genuine thermostat ($85 with discount) as I hope to have many thousands of kms and why replace and old thermostat? Mine seems to be buggered any way as I said. You pays your money and you makes your choice.


I should add that my idea of saving coin is doing it myself, But hey. it's fun. (When it is over )