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Wankel Bug
17:51:16 Thu
Jan 30 2003

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What's it take to install a Rotary

This was a question asked on the STF I'll post my answer here,hope this answers some general questions.

Anyone else who's done this feel free to add or discuss what
they have done.

Things needed to install a Rotary engine in a '72 Super Beatle=

1-Rotary Engine
2-Rotary Engine Automatic Tranny counterweight
3-Kennedy Adapter(flywheel,trans adapter)
4-VW Clutch=throwout bearing,disc,press plate
5-6 Volt VW starter
6-6 Volt starter bushing
7-Bolts and nuts for Mazda flywheel,VW clutch,
8-VW engine to tranny nuts and bolts
9-Crossmember for front mount on Rotary engine==(I used steel tube welded to Mazda
front mount and all-thread hooked to the bumper brackets)
10-Custom exhaust piping and muffler(flange from Mazdatrix and stainless exhaust pipe,Magnaflow muffler(must use stainless tubing due to high(2000 degrees) exhaust temp.Mufflers and routing your choice.Mine curves under the tranny and comes out under right rear fender.
11-Custom piping for water to and from radiator(muffler shop ran mine)
12-Hoses from radiator and engine to water pipes
13-Radiator(I used a Mazda 3-row radiator from a RX-7 that had a Auto tranny)mounted in the front with vent where super beatle louvers used to be.
14-Fabricate throttle linkage(I used Mazda
throttle cable spliced to VW cable and small
L-shaped bracket to hold cable.
15-Wiring -from VW to Mazda(Use two manuals-VW and Mazda and just hook it up ,LOL)
16-Gas line hookup(Mazda style carbs use a return line-I used stock VW gas line for return and ran new 5/16 steel gas tubing under car along pan bolts-schools out on need for return line-you decide)
17-Optional at extra cost=Modified carbs,special muffler,MSD ignition,Turbos,fuel injection,etc=how much money you want to spend ?
18-Transmission=I used the stock tranny,cause its what I had.Choices are many-
Type 1 bug,Type 2 bus,Porche etc.
19=Oil cooler(Rotaries must use a oil cooler,I used the stock early style cooler with the stock hoses,mounted the cooler on the rear panel below the engine cover with a small fan blowing thru it..Your choice on what cooler and where to mount.
20-Do research on Rotaries,forums,web sites,etc.Lots of info out there.
Questions ?:peace:



---
'72 Super Vert w/12A Rotary,Yaw Carb,custom exhaust w/Magnaflow muffler,
stock tranny (no burnouts).
 
 
zenjoe
16:41:18 Tue
Feb 4 2003

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Re: What's it take to install a Rotary

Another option for your throttle linkage is the single carb linkage from CB performance. It is super simple and is easy to fabricate to virtually any carb.

  
Guest [UnRegistered]
03:36:25 Fri
Feb 7 2003

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Re: What's it take to install a Rotary

Why the 6 Volt VW starter?

  
Guest [UnRegistered]
03:56:33 Fri
Feb 7 2003

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Re: What's it take to install a Rotary


  
chairchild
23:26:22 Tue
Sep 23 2003

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Re: What's it take to install a Rotary

The best RX7 site I've found is www.RX7club.com Use the search button near the top, and you can find out almost anything about the engine there!

One bit of usefull info I found out was the OMP (Oil Metering pump). You have to either modify this or run pre-mix if you change the carb for a non-standard model. without it, the engine siezes up!

It tells you how to remove the "Rats nest" (what they call all the emissions junk on top of the engine)

etc, etc

  
Jeff20B
22:02:24 Fri
Oct 3 2003

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Re: What's it take to install a Rotary

The engine won't seize up without the OMP or premix. The apex seals and rotor housings will wear faster is all.

  
chairchild
01:16:36 Wed
Oct 8 2003

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Re: What's it take to install a Rotary

But the added oil also aids chamber sealing, without the oil, the housings and apex seals would wear very quickly, and you would lose compression.

Ever seen the price of new apex seals or housings?:shocked:

  
solobarixl7
05:49:33 Fri
Nov 14 2003

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Re: What's it take to install a Rotary

you wanna watch those apex seals, my brother had one go out on him with his rx7 and it kept trying to overheat

  
Joshshift
00:36:47 Tue
Nov 18 2003

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Re: What's it take to install a Rotary

you will break apex seals very quickly with no oil metering this engine relies on oil to run, especially in the combustion chamber. no oil - no engine

  
Pegheds
03:41:01 Sun
Jan 11 2004

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Re: What's it take to install a Rotary

I have several RX7 VW conversion components available. Will share experiences.

1 RX7 13B engine. 1 Remanufactured shortblock. Kennedy adapter. Dellorto Carb and 2 Racing Beat intakes. (one for 12A one for 13B) Flywheel. Counterweight. etc. Everything you need. Was my everyday car for 5 years. Super reliable. Put over 90,000 miles on car. I am going to try a Subaru this time.
violoncello@juno.com Located in SC

I put radiator behind back seat. Welded in new firewall. Oil cooler up front.

  
JayBug72
21:37:30 Fri
Jun 11 2004

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Re: What's it take to install a Rotary

Do you still have the adapter plate and flywheel. Looking for a good used one.

  
zenjoe
19:11:49 Mon
Jul 12 2004

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Re: What's it take to install a Rotary

most aftermarket carbs have vacuum ports, stick your oil metering pump to those and you will be fine. No need to premix!

I have an IDA carb that doesn't even have a vacuum port, but it did have a float boal drain. What to do with this is put a hose barb where the floatbowl drain is and connect your oil metering pump to that. That way the oil metering pump automatically premixes the oil and fuel for you! Works great and I have been running like this for over a year.

Do not put your oil metering pump connection in the intake manifold, it will suck oil into your intake all the time and make for a very smokey engine.



---
For more information on stuffing a Mazda Rotary engine in a Bug, go to my website at http://www.geocities.com/zenjoe/vw.html
 
 
thegimpster
13:33:56 Thu
Aug 26 2004

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Re: What's it take to install a Rotary

what is the automatic tranny counterweight for?

  
ghiadesigns
00:01:26 Tue
Jan 4 2005

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Re: What's it take to install a Rotary

It is my understanding that the rotary motor is not counterweighted itself, The manual trans has it built in, but the auto's had a seperate one. Since the VW tranny isnt counter weighted you need the one from the Auto so you dont shake the whole car to pieces
[1 edits; Last edit by ghiadesigns at 00:02:41 Tue Jan 4 2005]

  
vintagespeed
08:10:27 Tue
Jan 4 2005

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Re: What's it take to install a Rotary

Not exactly. The rotary has a front and rear counterweight. They have to match. The manual trans cars have the rear counterweight built into the RX flywheel which is why it wont work with the VW converted flywheel. The autos have a bolt on counterweight.

  
eurobuggynewb
05:47:23 Tue
Jan 11 2005

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Re: What's it take to install a Rotary

as i've seen alot on the net was the 12a rotary swap for the older buggs i was wondering if it would fit the 13b turbo? plz help i hardly kno anything about euro cars i mostly kno asain imports thx very much

  
Stoody
07:42:20 Sun
Feb 6 2005

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Re: What's it take to install a Rotary

I am wanting to instal the radiater in the back under the seat as well. But I have not seen or heard any pros or cons about it. Do you recomend a course of action how to accomplish this? I have a few ideas just want to know if I am on the right track. Would rather run the oil cooler up front or under the other side of the seat.
Does the smaller civic radiators work well with a rx7? Brother has a civic and the radiator does its job and is small.
Stoody

  
vintagespeed
08:09:25 Fri
Mar 18 2005

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Re: What's it take to install a Rotary

We just shoe-horned a 12A into my buddies '64 Bug, without modifying the apron it fits but it aint easy going in. A 13B will fit if you dont mind trimming the apron a bit. Overall it's only 1/2" longer than the 12A.

  
Jefftopgun
11:11:37 Mon
Dec 12 2005

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Re: What's it take to install a Rotary

Im confused, what exactly does the oil metering pump need to be hooked up to, and what exactly does it do?

  
Bugzlife
19:09:46 Thu
Dec 22 2005

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Re: What's it take to install a Rotary

You forgot in your list, a couple 12 packs of beer.:biggringreen:
[1 edits; Last edit by Bugzlife at 19:17:26 Thu Dec 22 2005]

  
Bugzlife
19:10:28 Thu
Dec 22 2005

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Re: What's it take to install a Rotary

oops might not go well if drunk.....:wtf:
[1 edits; Last edit by Bugzlife at 19:11:37 Thu Dec 22 2005]

  
rotorz
20:36:41 Mon
Jan 16 2006

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Almost Serious

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Re: What's it take to install a Rotary

oil metering pump pumps oil into the intake to keep the apex seals lubed. the metering pump adds oil according to throttle angle so at idle its not doing much, but at WOT its pumping like 1oz per minute.

  
Josh59
06:58:19 Wed
Apr 19 2006

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Re: What's it take to install a Rotary

do all four of the lines off the oil metering pump shoot out the same amount of oil? just curious and if they dont what goes to what. Oh and im running a holly. do i n eed just one line going into a vac? or do i need to run both into van lines. and.... what vacume line? haha any? im getting close to this step.

  
DarkWanderer
17:39:30 Fri
Jun 16 2006

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Re: What's it take to install a Rotary

I don't understand why use a 6 volt starter.... The rx-7 use a 12 volt no?

  
Urban_S
16:49:37 Wed
Jun 21 2006

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Re: What's it take to install a Rotary

The 6 bolt starter using 12 volts spins faster.

  

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