Dual fuel PFI rails....

[Gary Derian]

If this is being done to run high octane under boost conditions, why not use
water injection?

Gary Derian <gderian at oh.verio.com>

> >but @ WOT, can go from 1 to 15 psi in a couple of >seconds.  Just picked
1
> >psi as arbitrary switchover point (controlled by pressure switch, not
> >manual).  >If there's enough 'lead time', manually switching over would
work
> >fine, w/ the purge valve delays, etc.  >I wanted sort of an automatic
> >system, but it doesn't look as if its 'instantly' do-able.  Dual
injectors
> >>would be ideal, of course.
>
> How about you have 2 totally seperate systems, not interconnected.  Both
> fuel pumps run at the same time etc, but you have a box (solid state relay
> would work just fine) that just switches over to the 2nd injector... kill
> the 1st, power the 2nd.  Be the most efficient and would be instantaneous
> on switchover.  That way, if the cal was done for best running on say
> street driving, tailor the 2nd injectors on race gas to be slightly larger
> for a bit richer mixture for most power under full boost.