I don't know. I'm not sure under what conditions they measure this
increase. I would assume that this is not so over the entire rpm range,
but just at one point. I also *speculate* that this must be at very high
rpm, like 5,400 or 6,000 rpm, where the stock ignition system becomes
marginal. 

A much cheaper CD ignition (at $90 about 1/5 the price of Jacob's
thing-a-magic) should do a similar job. Just an opinion/guess.

Sami

On Sat, 13 Apr 1996, Lund wrote:

> Jacobson's electronics claim there computerized ignition system for the
> waterboxer gives the van 10-12 more horsepower and 2-3% beter gas mileage.
> Has anyone used there product on your van?
> Bill
> 
>