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Re: [T3] FI for Carbs


On 27 Feb 2004 at 20:57, Keith Park wrote:

> If you check into it (and a listee did) the 009 originated as a dist for an
> early industrial engine that runs at constant speed... that wouldnt be much
> of an advance curve for a street driven engine would it? 

I'm skeptical about that conclusion. It's possible, but I think that any engine 
that runs above idle would still need some advance mechanism in order to get 
decent power and economy.

The 009, and some other mechanical advance distritutors became popular in the 
mid 60s when beetles came with vacuum advance dists only. If you changed your 
carb (the Holley Bug Spray was one popular example) you found that the old dist 
now gave you NO advance, so what can you do? You find a dist with a mechanical 
advance so that you're no longer dependent on a match between the vacuum output 
on a random carb and the vacuum needs of an OE dist.

Our D-jet dists came out in 68, but it took the racers a few years to pay 
attention, by the time anyone had noticed the beetles had mech adv dists, too, 
so type 3 dists never got much attention. In the long run that's a good thing 
for us, because otherwise 311L dists would be selling for $150 apiece in cruddy 
condition (and I'd be RICH!).

-- 
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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