can it be done? Would there be a big increase from a 13b na to a 20b na, how many ports does it have, give me the specs someone.

 

Hi

RE-A is now producing 20B NA motor for a race car.
I will post pics later.

 

You're going to spend just as more money that you would just running the stock twin, and make a whole lot let power.
Figure 10k plus to do it.

 

Yes, there are a few running around over here. It's no harder than de-turboing any other engine.Around 50% more than a 4-port 13B. Figure ~200hp. Two side inlet ports and one peripheral exhaust port per rotor, just like all 4-port 13B's. Mazda never made NA 20B's, so there are no factory specs.

Like Dyre said, you're not going to save much money running without the turbos, you'll just have a lot less power and torque. Even on mild (read safe) boost, the twins will give you 300+hp and more torque than a 300hp 13BT.

 

How would you re-tune the 20B for more NA low end torque anyway? VDI, 6port (err 9 port ??), smaller exhaust ports, etc..

I'm assuming you'd want to swap out for higher compression rotors out of the NA engine.

 

no it wouldn't be nine port, the ports is per rotor bah argh >