Neil,
I never did establish the real impact on idle speed of the
throttle body distance from the rotor housing. I more relayed on
work others did and what I observed with using other carburetors.
If you are happy with the idle speed you get at 18 inches runners,
you can use the TBI as it is coming from the factory and just put
an air filter to the intake.
From what I have seen on piston engines, you may get away with a
plenum and a single TBI of the proper size.
Richard.
Richard,
I have the throttle body 18 inches away from
the housing entrance and it idles at 2200 reasonably well.
Sounds like you tried having the TBI away from the housing ---
what results?? Other than that I can understand you advice re
the TBI. Neil Unger.
Neil,
0n a P port, you want to have the throttle body as close as
possible to the rotor housing for an as low as possible idle
RPM. Mine idles pretty good at 2300 RPM. So any tuning intake
length on the intake will have to be outside the throttle
body. However, the TBI has a cone on the intake side with the
reference pressure pick up for the fuel pressure regulator
included. It assumes that you have an air filter attached to
the TBI. Using a tuned intake coming into the TBI, would have
to have a continuing inside diameter. In order to meet that
you need to insert a filler to eliminate the intake cone,
which at the same time eliminates the reference pressure pick
up, physically and functionally. The physical part should be
obvious, but the functional part needs to meet good old
Bernoully's ideas. In order to avoid the high static pressure
drop in the intake pipe at high flow rates and with that,
lowering the reference pressure at the fuel pressure
regulator, the pressure pick up has to be moved to the inlet
area of the intake. It took me some fine tuning to find the
right place. I ended up with it inside the air filter where
there is very little air velocity changing floe direction.
I hope all that makes any sense without having the TBI in
your hand.
Richard.
Yep, I have P port, Hoping that will not affect the TBI?
What grief did you have?
Neil.
Neil,
it consists of a CDI unit triggered by a reluctor, like
the one on the Renesis(RX8) engine. The coil is from a GM
waste spark ignition. Off course on the single rotor all
you need is on trigger tooth. Everything considered, I
would use on a two rotor just two identical systems, still
one tooth but two pick ups.
If you talk to the guy at M&W he will help you, real
nice.
One thing on the TBI. If you use it on a P-Ported engine
and have a tuned intake, it dos take some modifications,
for which I did not get any help from Rotec.
Richard.
Richard you ex patriot,
I know of
one bloke who intends to use the Rotec TBI, but none in
operation that I know of. More details on your ignition
system please. Neil.
Hi in Down Under,
has anybody down there ever tried or used a Rotec TDI
on a Rotary engine? It is your local product. This is
what I am using on my single rotor after having tried
all carb solution I could think off. It also gives you
a manual mixture control. Once it was set up and
running right it is always doing that. I also am using
a single channel CD ignition system from M&W with
a dual output coil. I have no down side found on that
setup so far.
FWIW
Richard.
Probably a
displaced sentence for Tracy. I only speak
Weber...............LEH
In a message dated 9/17/2018 5:18:27 PM Eastern
Standard Time, flyrotary@lancaironline.net
writes:
Gents,
As always much good advice.
What I really miss is Tracy's manual
mixture trim. Tracy I assume it
can be resurrected in the new setup??
Lynn, the fixed timing seems to
work as you say, Can you alter the
mixture with a trim pot?
Neil Unger.
--
--
Richard Sohn
8029 County HWY 1087
DeFuniak Springs, FL 32433
--
Richard Sohn
8029 County HWY 1087
DeFuniak Springs, FL 32433
--
Richard Sohn
8029 County HWY 1087
DeFuniak Springs, FL 32433
--
Richard Sohn
8029 County HWY 1087
DeFuniak Springs, FL 32433
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