injector sizing

[Neville Newman]

[comments about the downside of bumping un your injector sizes]

i was too poor to afford agtermarket programmable EFI, so i
solved this problem by installing a non-constant fuel pressure
regulator.  i got mine from Camden Superchargers on a beta
test, and they made a couple of changes to the housing based
on my comments, but i think it is stil available with the
same design.  

They use two different size rubber diaphragms (one open to
intake vacuum, the other to fuel bleed-off) to cause a linear
increase in net fuel pressure as the vacuum on the reference
port decreases.

It worked like a charm.  i also bumped my injector sizes because
i was playing with M85 fuel at the time (requires richer mixture
by volume) but that would not generally be necessary.  i was 
able to reduce the baseline pressure, and use a large enough
diaphragm ratio to achieve a nicely lean 18:1 A/F ratio at
no-load/light-load cruise, and a healthy 12.5:1 ratio at
full throttle.

Camden was in Dallas, i believe, but i don't have their info
here with me.  For those who want a more expensive, but less
tweakable, British version, Microdynamics markets a similar
regulator.

						-neville