Re: A 'What is' and 'What does it do' question!

[geordy <grostad@thresholdnetworks.com>]

I don't know if this is acurate but when I tweaked the timing on my
girlfriends '86 subaru, it changed the powerband as well. 

Foxx (in a box) wrote:

>> What is the advance and retard?
>> What does it do?
> 
> 
>   it has to do with the timing and your distributor. it effects when the
> cylinder fires. there are number of people who run their timing a little
> advanced (i think) which will cause the car to run richer, unless the
> mixture is adjusted (which is usually the case). from what i can tell,
> the benefits are much like modifying your air box. some people notice a
> difference, others don't.
> 
>> Also, and this is just cause I was wondering, after about 5-10 minutes of
>> driving a hear a relay click does anyone know what it does, I have been
>> wondering for a while now!
> 
> 
>   coming from where? in the engine bay? mine does that when the idle
> drops too low. it's a vacuum relay which allows the pressure to escape,
> thereby keeping the car idling. if yours i doing that, then you can
> adjust the idle screw on the back of the intake manifold. specs are/were
> posted on the hood, but i think they want it somewhere between 750-900
> rpm. on both my '85 and '85 8v's, i've got it set for about 850 rpm.
> 



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