Greetings all this is my first post here. I am new to the rotary world, but have experience wrenching and fabricating on conventional vehicles.



My goal is to build a naturally aspirated engine that makes 200-215 gross hp. It will have no smog restrictions. What is the most cost efficient way to achieve this? 12a, 13b, carbed or fuel injected?



I have no donor car/engine so that will effect price of engine build up, ie carbed I don't have to buy a pcm, harness, etc.. Not that I'm opposed to fuel injection, but install will be a little easier carbed too.



This will be going into a light weight 1969 vw beetle- just a little something to confuse my v8 friends with.



--Paul

215 at the flywheel? No prob. Go get yourselg a 81-84 12a out of an RX7. You can rebuild this with a large streetport and buy the RacingBeat Holley setup and you should be around that. Since your putting it in a VW, the exhaust will be built custom and it should be free flowing--Loud! Or you can use the 12a side,iron,housings and get all 13b internals incl. gsl-se rotor housings and build a 4-port 13b like mine. With a streetport you could get 250-260hp. With a bridgeport you might be looking at more like 260-280hp. This is just my opinion and some of the figures could be off a bit. I've never looked up or even cared about 12a specs soo...

Go for a 13B, Fuel injection will cost you more but, it will be easier to drive and start.



use the turbo housings with 6 port intermediate housings, that seems to be the hot setup

Thanks for the replies.



The turbo housings seem to be liked better, is that because they are easier to port? Say I get a fuel injected 13b with the turbo housing. How do I build it to make the power? Would i want to go with a bridge port, would a street port work? What kind of seals, or other internal mods? Any intake, exuast mods? Whats the proven ticket for 200-215 flywheel N/A hp, that will last for a little while with some street use?



Just trying to learn from the experience of others instead of learning the hard way.



Thanks



--Paul

in a few months my NA buildup should be on the dyno and I can give you hard numbers on at least one approach.

Didnt it's bridged 6port make 200 something?

there is no way you will get 250-260 hp with a streetport, too optimistic! I think you need to start with a 13B, streetport it and then slap a weber on it. That'll give you 200+hp. If you have lots of $$$ to spare, you can get a programmable efi, go through lots of tuning headaches and then pretty much arrive at the same power. But it'll look a lot cooler than having a carb.

thats what i did. https://www.nopistons.com/forums/pub...IR#>/bigok.gif

easiest i think would be a series 5 NA street ported with a holley. as far as FI, u can get a F9 haltech for controlling fuel and then using 1st gen ignition set-up.

if u go with a 4 port build, use all 3 turbo 2 iron plates(the center housing doesnt have the EGR) and rotor housings(if possible, they dont have the diffuers) with series 5 NA rotors.

an old shool 4 port 13b will do 200+ at the wheels with a 48ida and a streetport



mike