What Is A 20b?

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01-29-2003, 02:52 PM

#21

turborotor

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Join Date: Nov 2001

Location: LA, USA

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http://members.tripod.com/~grannys/4rotor.html

Granny's shop, which makes v8 conversions for rx7s made a 4 rotor engine. Here is the link,

01-29-2003, 02:53 PM

#22

j9fd3s

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Join Date: May 2002

Location: California

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i'll list the differences by housing.

front cover: looks like an 89+ fc

front iron: similar to an fc casting, except larger runners, and the front rotor tension bolt holes

rotor housings: 89 fc with a different exhaust sleeve

rotor: 89 turbo

2nd steel: double thickness of standard, it has an oil drain and a stationary gear

3 and 4 steels: similar to s5 t2, except larger runners and larger tension bolts.

mike

01-29-2003, 08:56 PM

#23

Racer X

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Location: Vanderhoof,BC(Canada)

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Quote:

Originally Posted by InfiniFC3S' date='Jan 29 2003, 12:37 PM

If I'm not mistaken, aren't the 20B ports larger than those of 12As and 13Bs? What the advantages be on using 13B housings? Just curious.

the biggest thing is the price of a 3 rotor 13 as opposed to 20B.Thats why the hitman did that.He wanted something on a budget that could take the high power levels on a daily basis.The biggest things needed is the custom e-shaft from austrailia and the 12a housing with stationary gear integrated into it.

01-29-2003, 08:58 PM

#24

Racer X

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OH and a 13b 3 rotor needs a custom lower intake and exhaust manifold I forgot to mention that too.

02-01-2003, 02:22 PM

#25

r_xplicit

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and all this time i thought someone revealed a bra size

02-03-2003, 12:57 AM

#26

drifter

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Join Date: Dec 2002

Location: Perth, Western Australia

Posts: 1,788

Quote:

Originally Posted by rx7machine' date='Jan 25 2003, 12:20 PM

Quote:

If a 20b is the same thing as a 13b, but with an extra rotar, that means if I have 2 13b's i can build a 3 or maybe even a 4 rotor motor?

Ill just run it on an stand alone ecu of some type?

OR AM I JUST CRAZY

Yea, the 3 rotor and 4 rotor motors have been done before.. I guess you could make one yourself.. but alot of things come into play. The main thing that comes to mind is housing, but not sure..

Quote:

12a = 1.2 liters

13b = 1.3 liters

20b = 2.0 liters

i hope im right, please feel free to correct me if im wrong.

good luck building that motor. i see that happening real soon

That's correct. :bigthumg:

I know this is way down the thread now, but the 12a isn't 1.2L, its 1.1L. Well actually, its 1146cc which is rounded down to 1.1L. :bigthumg: