<VV> custom distributor curve?

[Mark Durham]

OK Matt, now I'm the dummy. I understand about the three spring kits, but I
need an explanation of the benefits of removing the vacuum advance.  I
don't drive my street car enough to worry about gas mileage, but would like
good steady performance from the engine.

I also understand the weights and springs swing in and out at different
rpm's adjusting the advance, hence finding the sweet spot, but how does the
vacuum advance mess with that? It works off of manifold pressure, but I
haven't sent any time thinking about the interrelationship between the
mechanical and vacuum advances in the cars. I would think the vacuum
advance would continue to advanc the enine beyond the capability of the
mechanical advance. Am I wrong?

So, what benefit is there in removing the advance alltogether?

Mark Durham

On Wed, Feb 20, 2013 at 5:21 PM, Matt Nall <patiomatt at aol.com> wrote:

>
>
>
> I'm aware of the kits of three sets of springs and that there are different
> weights out there but that is about it.  How do I know what kind of curve I
> want, and how do I figure out how to create that curve once I know?
>
> The Distributor:
> AFAIK stock 140 distributor
>
> The Engine:
> 140 engine
> LeVair 1/8" over bore stock carbs with other mods (relocate jet etc.)
> Bored .060 over
> 280 Isky Cam
> Increased compression heads (no step)
> Clarks Ultimate headers exhaust
> 66 4 speed trans
>
> Use:
> Plenty of street use but trying to make a good autocross car out of it
> (also road corse, hoping to do the Olympics this summer).
>
>
> Thanks for any advice!
>
> Ray R.
>
> ======================================================================
>
>
>   Ray.....   First talk To   Warren / Michael for their recommendation!
>  They got experience!
>
>
>   To properly "re-cure"  you need a Dyno....   to  Chart results...  and
> then make a decision on a curve,
>
>
>  Then you need track time to   "  fine tune it"
>
>
>   Barring that... since you do not have an assortment of weights and Dist.
> Cams...
>
>
> Put the fast set in and try it... then the Medium...  Then Mix springs...
>   You may fine a "sweet spot"
>
>
>   But first and foremost....  remove you Vacuum advance......  that is for
> economy..for the Dummy...
>
>
> Matt Nall
> Charleston, Oregon
> http://tinyurl.com/The-Corvair-Patio
>
> http://tinyurl.com/Matts-Tech-Pages
>
>
>
>
>
>
>
>
>
>
>
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