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MG Midget and Sprite Technical - Dizzy advance plates

Hi folks,

Anyone have or know where I might be able to find a 10 degree advance plate/cam for a Lucas 45d distributor?

Or a distributor with such a plate in it?

Cheers,
Malcolm
Malcolm Le Chevalier

27 series duel point mallory dissy is completely adjustable for any configuration you can imagine.....it fits both the A series or 1500 they can be converted to electronic also but i think that also takes some of the adjustment out of them

Peter burguss also sells a nice fully adjustable dissy you can adjust on the fly with a laptop...no springs or dog weights to mess with...

. old school or new school solutins which ever perfer

prop
Prop and the Blackhole Midget

Why not lock up the advance and fit an Aldon Amethyst unit? That would give you total flexibility in setting up your timing profile. You can switch between two profiles on the move.
Graeme Williams

I would love a super shiny fully mapped system, but I am an unemploymed bum and don't have a spare few hundreds! :-D

I am looking for a cheap and cheerful way to increase the advance at the top end. the standard 1500 dizzy has 14 degrees (crank) advance at 3200 rpm, plus 10 degrees static means only 24 degrees total.

I think it could happily take 30, but I don't want to dial in 16 static. a ten degree plate (dizzy degrees) would extend the top end of the curve to give me 30 degrees total advance at approx 5000 rpm. (incidentally, very similar to the triumph 1300 curve, but they used a delco dizzy).

Malcolm
Malcolm Le Chevalier

You would only find out on the rolling road. We have found most 1500s are happy with small levels of advance, showing the combustion must be fairly good, as higher advance means less efficient combustion.
If you want to do it cheaply file the advance plate so it can advance further. We tend to need to reduce advance at times and we do this by welding a blob of metal on the end of the plate, file it down and away you go.

Peter
Peter Burgess Tuning

Thanks Peter, yeah if all else fails I will whip out the file!

I found a couple of threads in the archive discussing this, in one of them someone claimed to have done a few rolling road tests and found that anything beyond 30 degrees gave no further improvement on the 1500.

24 just doesn't seem like enough (cue me exploding my engine :-D)

Cheers,
Malcolm

Malcolm Le Chevalier

This thread was discussed between 07/02/2016 and 08/02/2016

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