Greg,
I’m
running the same turbo as Dave Leonard.
The company is BNR turbo, and they take a 2nd gen turbo, and rework
it with a T04 compressor, and 360 degree thrust bearings. They also trim the hot side impeller, open
up the waste gate, and balance the whole assembly.
On the
13B, it is a nice option, because it bolts right on. With the 20B though, it is a different story. If you have to have an intake made
anyways, you’d be best to just got with a straight T04 turbo.
I’m not
sure how closely Paul Brannon monitors the list, but he has a 20B turbo, and
would be a good person to talk with about it.
On mine, I’m
running the waste gate full open (no flapper), and I still get tons of boost. I only opened it up once on a fast taxi,
and it went to about 10 lbs of boost.
The acceleration at 10 lbs was substantial.
I normally
throttle up to 5 lbs of boost, and rotate at 80 kits. That takes about 1500 feet of runway followed by about 1500
FPM climb. I really don’t think
that I need more than 5 lbs of boost for takeoff.
Steve Brooks
-----Original
Message-----
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]On Behalf
Of Greg Ward
Sent: Monday, April 14, 2008 6:20
PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: New
Radiator
Hey
Steve;
Which
make and model of Turbo are you using? Getting ready to go there this
next week, and need to make some decisions. Anybody else with 20B turbo
experience, especially wastegates, boost controllers, etc. that has any input
here would be gratefully appreciated. Just got my ECU, yay!
Greg
Lancair
20b in progress.
-----
Original Message -----
To: Rotary
motors in aircraft
Sent: Monday, April 14, 2008
2:43 PM
Subject:
[FlyRotary] New Radiator
I’ve made a few flights now
with the new turbo and finally have the engine re-tuned, so it is running
great. The down side of the new
turbo is, that my cooling, which was a bit marginal is worse with the new
turbo.
I did plan on making some
inlet adjustments, but finally decided to just go with a customer built
aluminum radiator. I found a company
here in NC that makes them to order, and it should arrive tomorrow. It will also have the aluminum shroud
with it to mount a cooling fan, which I did not have before either. With the pusher, anything over about 10
minutes of ground operation would have temperatures over 180 before the takeoff
run.
I also had ¼” NPT fittings
put right next to the AN16 inlet and outlet, Since I already have a sensor on the water pump outlet, I’ll
use the inlet fitting for a limit switch to operate the fan. I’ll also put in a switch on the
instrument panel to operate it manually as well.
In the next couple of
weeks, I’ll remove the old evaporator cores and plenum, build mounting brackets
for the new radiator, and build a new inlet plenum to the radiator. I had them put a ½” flange around the
perimeter of the core on the inlet side for easy attachment of the plenum to
the radiator.
Steve Brooks
Cozy MKIV N75CZ