What model is their $900 box? the HPV-3B or one of the TEC units? Don't
forget adding the cost of re-springing the advance curve every time you want
to change something. Probably with shipping $100 a pop.
Personally I would like something that can handle a hall effect sensor in
the current distributor using a pertronix trigger or something similar.
Gutting the Lucas distributor so no centrifugal advance, and plugging the
vacuum line to prevent vacuum advance\retard. Then the bare signal goes to
the box, it does its thing and calculates how much advance is needed
depending on some factors like a knock sensor and whatnot. It triggers the
coil, coil discharges, goes to the rotor, rotor contacts correct cylinder in
cap, cap goes to wires, wires to plugs, and BAM off you go.
Anybody know of such a box? The electromotive I believe has to be triggered
using their crank sensor.
The computer should be able to calculate with enough precision using the 4
lobed distributor shaft. Now for sequential fuel injection, that needs more
"Resolution" and a timing wheel is the obvious choice..
Toby
>I think the only viable option for mounting a sensor wheel
>would be off of the
>cam drivebelt pulley. It would still be a lot of work.
>However, I really like
>the idea of being able to program an advance curve with a laptop, lower
>maintenence, less junk under the hood. Their $900 setup can
>take input from a
>knock sensor and a vacuum sensor.
>
>When I consider the fact that my last $168.00 distributor
>lasted for two years
>before the vacuum capsule died and the bearings went out AND
>that performance
>distributors run at around $300.....
>
>If I decide not to do a crank trigger system on my MG, I am
>still interested in
>doing it on my Jag. I've heard that the longer-stroked 4.2s
>can really benefit
>from ignition improvements.
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