Paul

I needed an opinion other than my own about a 20b engine that is
available.  It has the following work already done on it:  He wants
$8500 and I’m thinking of getting this and mounting on my Cozy MK14
which has a 4” wider fuselage.

3 new rotor housings $1800.00

new gaskets ,seals and bearings for rotor and shaft all of them ..
Atkins Rotary Kit 1800.00 $

3 race bearings for the rotors 360.00$

Racing oil pressure regulator 110.00$

Resurfaces side housings lapped and hardened . 800.00$

Ported and polished housings 900.00$ street

Polished rotor faces mirror finish 300.00$$

Custom fuel rails 350.00 $

3 1600cc and 3 750cc injectors 550.00$$

polished everything that's aluminum ...

Rebuild cost 2500.00..

Stock motor cost 4000.00 ..

Unorthodox main alt and water-pump pulleys 250.00 .

It has a 3 gen rear hosing plate ported and mached ... so you can mount
the 3 rotor in the stock frame using the 3 gen motor mounts .

It has a cut lower intake manifold so it will clear the hood ...

Will come with the stock motor mounts, full engine harnes , stock oil
pan, TB and elbow polished

It also comes with a 1 year warranty.



Is this a good start or something I should stay away from for some
reason.  I wanted 300hp available for take-off.  Could this engine
run with a turbo if I wanted to add it?



Rick Irwin


Is that the one that has been for sale at Sun N Fun for the
past several years?

Depends on what kind of apex seals Atkins put in it.
If they are after market they should be changed back to stock.

IMHO I would check with Mazdatrix to see what it would cost
to overhaul a 20B.

The price and pricing of some of the work seems a bit high.
To me. Last time I looked 20B's were going for about $3,500.
That leaves a lot for overhaul at $8,500. Sounds like
there are a few things you won't need like the race bearings
as you are not going faster than about 7500 RPM.

On the other hand 20B's are getting scarce.

I'll copy this to Dave Lemon at Mazdatrix so call him
Monday and get his opinion.

Mazda RX7 and Rotary Engine Parts and Accessories
2730 Gundry Ave.........Signal Hill, Ca. 90755

562-426-7960 For Parts Ordering, and General info
562-426-4460 For Local Service and Parts
562-426-9646 FAX

Open Monday - Friday 8:30 to 4:30
(Closed 12:00 to 1:00 Pacific Time)


Also you might want to send private email to
Al Gietzen and ask his opinion. <ALVentures@cox.net>

Paul Lamar ...No rotor no motor.

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