2 replies to this topic

[Albino_Hedgehog]

Just wondering if anyone is running an Aldon Amethyst setup?

Thinking about getting this for my MG 1098 build, so that I can adjust the Advance Curve to suit the engine.


Wanting to know what people think, and if they are worth the money!

This will also be a daily car...

[Orange-Phantom]

I've recently installed one on my 7 port.

 

A very nice piece of kit, easy to install and setup and when you get it rolling roaded the curve can be programmed to exactly match your engine.  If you make any further changes to your engine then it's easy to change the curve.

 

You can have several curves, i.e. for different fuel types, soft rev limiter plus it automatically calculates dwell.

 

They do 3 versions TPS, vacuum and Turbo so get the correct one for your engine.

 

The only main faf is that you have to lock your distributor in it's fully advanced position but that's actually not that difficult, and it'll be better off running an electronic ignition unit, but it will run off points.

[6joshh6]

I had one, on my 998, it had a fully ported 12g940 head, mg metro cam, 1.3 ratio rockers, lcb, rc40, howley inlet, and an med stubstack. It was a pretty special engine, so rather than fit a generic re curved distributor, I got an amethyst. On the plus side, it's very easy to use, and the software is nice and simple. It didn't really improve much performance wise on a distributor which I had re-curved myself using morris minor advance springs. In terms of driving it, it was a bit smoother, but otherwise no real difference. The rev limiter was nice, and worked well (it is a soft cut, so it doesn't kick in suddenly, meaning you don't bounce it off the limiter). The biggest difference I found was in terms of MPG. I got a steady 50mpg on a gentle run, something I hadn't managed before, even when the engine was standard it didn't get more than about 45mpg. 

 

If I'm honest it didn't improve much over the re-curved distributor, and if you have the skills and knowhow to recurve one, there is no real competition, in terms of cost/performance. On the otherhand, if you don't know how, and don't have the time to learn, an amethyst is a bargain. It gives you much more adjustability, and is easy to change once you have everything set up. The only other thing to mention, is if you think you might turbo your car in the future, you can use the turbo one for everyday driving on an NA car, all you do is leave the vacuum advance alone when you lock the mechanical advance, meaning the vacuum advance still works and you get the economy, while the amethyst takes care of the performance side of things. If you're interested, I still have my amethyst, but as I've removed the a series for a 1.8 k series, it will probably be for sale at some point.