Lucas Slide Valve fuel injection is probably the only good thing Lucas ever
produced. All metal. Many tiny roller bearings. Friction free. Uses 95 PSI fuel
pressure. The injectors shoot right onto the slide. However, there are no fuel
leaks from the system, so this is no problem. Idle under 1,000 RPM is
typical. I should never have sold my last one. The idea is to grasp
that last 4 or 5 HP from a Formula One engine.
For airplanes it is an answer in search of a question. Years ago we ran a
factory Pport 12-A in the racer. The housings had been hopped up by Mandeville
for later closing points. So the engine had very little low speed torque, but
was drivable at low speed. The carb was a 48 IDF Weber. No balance tube was
used. Idle was as low as you wanted it to be.
I would use two TBs with injectors after the butterflies.
Just my opinion. I could be completely wrong.
Lynn E. Hanover
From: jskmberki@windstream.net
Reply-to: flyrotary@lancaironline.net
To:
flyrotary@lancaironline.net
Sent: 11/27/2012 7:36:00 A.M. Eastern Standard
Time
Subj: [FlyRotary] Fwd: P Port 101
Sent from my iPhone
Begin forwarded message:
Mark,
I am trying to evaluate what to do with the fuel system
including the slide throttle. Based on your experience in the real world,
why does it bind during operation? Is it the vacuum created by the
rotors? Is the coefficient of expansion using aluminum and Teflon
causing binding? I would think vacuum would be greatest at idle then
drop off as the hole gets bigger. The holes are teardrop shape on my
slide.
I believe I will have some puddling but my plenum is not
over the exhaust but some distance away and lower than the ports. If
the injectors are closer to the slide I see the potential for a leaking
slide to ruin your day. If the injectors were placed next to the port
and downstream from the slide would there still be a potential for
puddling?
Where should the air bleed be located? Downstream
from the slide? Does it provide air at idle to balance the
mixture?
Do gaskets between the spacer and the side plates of the
slide seal adequately?
I have a heat shield that surrounds the headers and plan
to duct air across the headers to keep temps down under the
cowl.
If puddling is not an issue if a metal plenum is used
that may be a solution. I originally had this but the metal portion of
the plenum got too big.
I am also looking at moving the injectors between the
ports and the slide. Appreciate any input.
Joe Berki
Limo EZ
13b P
port