Kevin,
I think I would be wasting my time if I
did not turbo an engine that begs for it like the later versions of the 13B and
the 20B (because they came that way!). It is more a problem of matching the
turbo for aircraft use (car turbos are a no-no
without drastic mods-copy an aircraft turbo sizing
for the same hp), making heat shields and putting the right control and safety system
together (blow off valve, waste gate, intercooler, piping, etc). I would never
wrap pipes with anything-you have to check for cracks all the time. Maybe “jet
hot” but no tape……..
Bellows are mostly for thermal expansion
and contraction adjustment of the manifold itself so the manifold doesn’t
break off of its mounts to the engine or break the rigid turbo frame mount that
is used to carry the turbo weight above the manifold. There should be no weight
carried by the manifold except perhaps it’s own.
I have never seen a stock or aftermarket
car manifold with bellows, but I bet there are some. You have to make your own
what with aircraft considerations, but the bellows are available on the maket for weld up. The one pictured was custom made by
Racing beat for a 1000 hp 20B turbo set up, that’s why the 4 bolt
attachments mod. Oh,,,,I was
wrong on it not having a wastegate exit-that’s
what the big band clamp flange is for, I just haven’t seen many like
this. It is a masterpiece.
Many certified turbo aircraft have sorts
of bellows, swivel ball joints, band clamp wastegate
and discharge fittings, and have slip fit joints in the piping that do some of
the same things the bellows do-allow for expansion and contraction of the pipes
themselves.
When I had a hard drive crash all my 20B pics
disappeared, but if I think of it I will take another pic of the 20B manifold T04
type I have and post it. You might find it in the archives.
Marc
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
On Behalf Of kevin lane
Sent: Friday, December 03, 2004 4:51 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: exhaust
help
are the bellows to relieve
stress on the welds from expansion? why don't all headers have
bellows? my plane won't have a turbo.
----- Original Message -----
Sent: Friday, December 03, 2004 2:04 PM
Subject: [FlyRotary]
Re: exhaust help
Very dicy to find one for
a 20B. I did find one from the Japanese RE Amyeia (sp?) but the wastegate goes
the “wrong way” toward the prop…..and you will need a spacer
to get the turbine housing away from the engine as
well……..……I think Bob Darrah welded his own up out of
inconel……kudos to him, wish I could do that! Best bet-when ready to
fit to engine with mount all done, make up your own from 321 ss with expansion
bellows and make sure it fits…with an external wastegate….unlike
the one Racing Beat did for experimentation pictured here as it has no
wastegate…..
Marc Wiese
-----Original Message-----
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of kevin lane
Sent: Friday, December 03, 2004 12:02 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] exhaust help
I am at the stage of
designing my exhaust layout for my 20B. what direction would a stock
exhaust manifold exit? I'm guessing that I will have to have one in hand to
see how the clearances are around the engine mount. that may force me to
have one fabricated. any idea on the availability a 20B exhaust manifold?
----- Original Message -----
Sent: Thursday, December 02, 2004 1:35 PM
Subject: [FlyRotary]
Re: Bernie Update, Good news& bad, empty weight and injectors
Yep, Tracy listened to them click and they all
sounded good when he was here 2 weeks ago. I have pulled them and currently
thinking of ways to test them off the airplane at the minute. They are
195500-1350's and if you do have some that I could try, would appreciate you mailing
them to me. I'll be happy to reimburse you the mailing cost!
I'm sure Tracy also checked
the impedance? Were they high or low (with external resistors)? The
number you have came in two flavors, one was red, low impedance and came in
the 86-87 NA engines. The other was purple, high impedance, and
came in 88 NA engines. I believe I have two of the 88 high impedance
version at the hanger. If that's what you have, I'll sent them your way,
though it will probably be Monday before I can mail them.
Mazda RX-7(Gen 1 and 2) Fuel
injector identification guide
Year | type | impedance | plug style
| plug notch position | flow rating | color | part number
------------------------------------------------------------------------
84-85 | 13B NT | low | square
| center | 680cc | orange | 195500-0900
86-87 | 13B NT | low | square | center | 460cc |
red | 195500-1350
86-87 | 13B T | low | square | center | 550cc |
tan | 195500-1370
88 | 13B NT | high | square | offset
| 460cc | purple | 195500-1350
88 | 13b T | high |
square | offset | 550cc | purple | 195500-1370
89-91 | 13B NT | high | oval | center | 460cc |
red | 195500-2010
89-91 | 13B T | high | oval |
center | 550cc | purple | 195500-2020
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