I have a 1750 engine in my 68 Spider and the springs in the dizzy are broken and the posts that they attach to are bent so I need to sort it out. I'm thinking of the following options.
Fix up my old distributor as standard or possibly with different springs/weights.
New Bosch distributor with a remapped advance curve for modern fuel and fast road driving.
A 123 electronic distributor with the settable advance curves.
Lock my broken distributor and use something like a Megasquirt to program my own advance curve.
Options one & two look to be the simplest route - just bolt it up and set the timing, although a home brewed spring/weight set up may need some fine tuning. I like the accuracy of the 123 set up but I've heard that the supplied advance curves are not optimal for modern fuels. The last option may be somewhat cheaper but I suspect it might be a world of pain to set up correctly. Driving is mostly for fun on the road with a little track day action and I would also want to throw in a MSD-6AL or similar in the near future.
If you mean the distributor with the adjustable advance curve then that is actually made by 123ignition, as in my option 3 above. I have now found a further option as a variation of 4 - lock the distributor and use the programmable variant of the MSD 6AL ignition. But that only seems to offer 25* of maximum advance, not the +30* that you really need for the Alfa engine.
If you mean Max "They're all crap apart from the one we sell", then yes I have. I don't mind strong opinions - I have enough myself - but I would be mindful to add reason to my argument. Fortunately I did get to speak to Andrew at Castle Combe on Saturday who was able to explain the issues in a little more detail.
It would help me a lot to get some information on the specifics of the remapped Bosch advance curve that Max claims so much for.
If you mean Max "They're all crap apart from the one we sell", then yes I have.
Umm, it's more like "we don't sell those because they're crap" but I know what you mean...
The dizzy's we sell are usually built with the advance curve to suit the owner's engine spec but we did a get a bunch built up to suit most cars (ie, "fast road"). I've got some advance curve figures somewhere in work for one of these but they're a bit meaningless unless your an expert in these sort of things (I'm certainly not!). I'll post these here at some point when I can dig it out!
I've got some advance curve figures somewhere in work for one of these but they're a bit meaningless unless your an expert in these sort of things (I'm certainly not!). I'll post these here at some point when I can dig it out!