I'm Andrew, I've been into VW's and cars in general for years, but never knew much about rotary engines. I recently picked up a '66 bug that has had a 13b stuffed in it years back, though; so here I am. It hasn't been driven in nearly 10 years, but we have had it running long enough to know that the carb needs replacing. So I'm going to do that and give it a full tune up at the same time. The first question I have is what the hell do I have? The bug I know like the back of my hand; but the 13b, I don't have the first clue about... I've been doing a bunch of reading up on Rotaries, but I can't seem to find what year would this have come out of?

 

Thats really pretty neat. I hope you are premixing two stroke oil with your fuel though, as it does not look as though there is any operating oil metering pump.

 

i would guess 76-78 yr model engine.

 

Yep, it is running pre-mix only. That's one thing that the guy I bought the car from did tell me about before he sold it to me.

When did they start making the 13b? I thought I read that '84 was the first year for it?

 

Considered doing this myself. Very nice.

 

That is pretty slick

 

bugs with rotors are nasty

 

nice bug you got

 

First civics and VW bugs boy what next ? I must say though that looks really cool, welcome.

 

cool car!

 

Wow that brings back memories. I had a 13b in a 1973 chop top bug. You have a potential street monster. The engine is an old 4 port 13b. The intake is set up for a webber 48ida. The adapter plate to mate the engine to the tranny is probably made by Kennedy engineering along with the special flywheel. The starter should be from a 6 volt bug because the 12 volt wont spin the engine fast enough. Cooling was the big problem with mine, which I eventually solved by running copper tubing through the heater ducts on the side of the floor pans. I ran a chevy radiator to the front of the car and made cooling ducts through the fiberglass front end. Good luck with the car. If I can be of any help let me know.

 

I forgot to add about the carburetor. If it is a Webber 48ida you might want to try to rebuild it as they are very expensive carbs. Some of the vw conversions ran a custom Webber 48 that was bored to a 51mm, you may have that carb. And I agree about the oil premix, you will definitely have to add oil to your gas tank.

 

im a local rotorhead if you need someone to come take a look at it. send me a pm

 

I've been working on a very similar swap myself. I'd love to see some pictures of how your exhaust is routed.

 

that the motor is a 13b from what looks to be a s4 rx-7 that has been converted to carberation and a 12a dizzy.. idk just what it looks to me...

 

That is a very cool application. Keep us posted on your progress with the car.

 

very nice vw, im a watercooled guy myself (mk2)
and have owned 9 first gens in my short driving career.

 

hey mate, looks to be an RX4 type block.

 

Here is a friends ROTORBUG in the UK - running a 13b bridge port, 48 IDA webber and close ratio VW box..

http://www.exile-rotorsport.com/viewtopic.php?t=315

 

thats freakin awesome,, bugged out rotor

 

it's a 4 port 13b. puts it in the 74-78 yrs. the lettering puts it 76-78 repu or cosmo. the rx4 13b 74-75 had "MAZDA" in larger letters and framed.

 

Fixableunknown is right, 4 port 13b. 84 was the first year for a 13b in an rx"7", though not the first for 13b use in a mazda.
Nice ride. My wife has been talking about building one. I say only if she goes with a big single turbo.

 

Im pretty sure it the 13b came out with the rx3. she is a chunky rx2 <3

 

That looks like a Racing Beat manifold. We tried a blow through turbo setup with one of those. It worked but hard to tune and even harder on the vw tranny.

 

Took me a bit to get back to this, sorry about that. I had a really busy week last week. The manifold is an IDA manifold. It actually had a 48 IDM (predecessor to the IDA) on it when I bought it that I just sold on eBay. I'm going to buy a new IDA to go on it to replace the IDM. As for the engine, it's not looking too good at the moment... I posted this thread about it as I started doing a little bit of maintenance.

https://www.rx7club.com/1st-generation-specific-1979-1985-18/rusty-coolant-passages-13b-820769/

I'm actually on my 3rd mk2 right now as well. I've got a vr6 swapped '90 Jetta Coupe as my daily driver.