----- Original Message -----
Sent: Monday, February 02, 2004 8:58
PM
Subject: [FlyRotary] Re: Non-EFI fuel
systems
Nice job on the intake
manifold, Rusty. Thanks for the info regarding the Ellison
throttlebody. Did it have a provision for leaning?
(similar to a standard aircraft carb)? Thanks. Paul
Conner
Thanks, and
I'm sure you can imagine that you're seeing the best side :-)
I'll know if it actually fits in about an hour.
As for the
Ellison, yes, it has a mixture control.
Sorry Ken,
but I don't agree with your view of airflow on these units. I think
they're more than suitable for the average NA 13B. To get
a 180 HP, doesn't it take a set amount of air, and fuel? If
so, why would we need so much more airflow than a Lycoming
O-360?
Cheers,
Rusty (in
search of argon)
Sorry to say but I think you are dead wrong on the need for high
airflow on the rotary and there is no way 350 CFM will work unless you want to
fly a turd.
You did a fine job making that high flow manifold and I bet you
wont put a 350 CFM throttle body on it.
I had 1000 hrs flying time on my old coot with a 51 Weber and when
I rebuilt it I could not get another 51 as they are hard to come by so I went
to a 48mm instead and there was a noticeable drop in power and I would switch
back to a 51 if I weren't go to a turbo.
For anyone thinking of a Weber I will say there are pros and cons
between a 48 and a 51, the 51 puts out more power but it is temperamental on
jetting and it runs rough on the bottom end compared to the 48, there is also
a 55mm Weber but I have had no experience with it but would consider it.
For the best deal on Weber carbs check out performance parts
warehouse at http://www.webercarburetors.com
Ken
Hi, Ken....Check out Mazdatrix. On their
home page, click on racing, then click on Weber IDA carbs, and you will see
that they have both the 48mm and the 51mm. The 48mm costs $575.00, and the
bored-out 51mm, part number 16602, sells for $850.00.
If I thought this
would bolt right on to a manifold, and have provisions for leaning at
altitude, my EFI would go back in the closet. Did I say I like to keep
it simple, no high pressure pumps, fuel sumps with fuel returns,
MAP settings to deal with, etc? I find it much easier to
simply lean the mixture with altitude than to try to set up all this fancy EFI
system. Thanks for the info. Paul
Conner