Thread: Defender rev range

Originally Posted by Ranga

Coincidentally, I did get my pulley fixed recently by MR (was squeaking like a stuck mouse!), but both before and after the tacho wasn't accurate, so I assume they replaced the pulley with similar.

Weeds - I'll have a look at your pulley when I come and take photos of your sliders.

Originally Posted by VladTepes

steve - yeah tried all combos of the dip switches - still no luck. The pulley is obviously the culprit. Weeds I hear of these sliders but will have to look at Rangas pics and hear his report as I can't get over there any time soon.
Could your design be adapted to a 130 easiliy enough ?

vlad....you must nearly drive past my house every day

hows does monday arvo sound guys

Originally Posted by steveG

So if the tacho is reading too high, the pulley must be smaller than standard (ie higher alternator RPM for given engine RPM) ??
Just trying to get my head around it...
That would tie up with my 300tdi disco experience in that the later model belt doesnt fit the early 300tdi (its too small so the earlier pulley must be larger)

Would a simple frequency divider circuit work to bring the pulses down to a frequency that the tacho can handle?
Something like this: Frequency Divider Circuit

Steve

the earlier 300tdi, defenders at least, had a smaller pulley fitted to the alternator, when i upgraded my alternator i went with the larger output unit that is fitted to the disco's, at the time i brought the longer belt instead of changing over the pulleys