Drakkar

Hi guys
I have no project, I'm not gonna build anything, I just wanna ask you this for learning\information

for building a powerful, high-revving, naturally aspirated rotary engine what is the best starting point (12/13/20b?)
what are the best thing to do to the engine?

what would you do?

thanks

FelixIsGod29X

iTrader: (50)

id love to own a 20B n/a. Reliable 350rwhp. Thats all i have to say about that..

rxtasy3

iTrader: (2)

wow, that much power from a 20b without turbo? interesting. on what type porting?

GtoRx7.

iTrader: (12)

350 rwhp n/a 20b's are not common by any means, not yet anyway. We are working on changing that as more people see what is possible through the R+D we are doing. A lot more power can be made though, I have dyno'd at 428rwhp n/a. Here is a link for info-

https://www.rx7club.com/build-threads-292/non-turbo-428rwhp-fd-build-up-history-937570/

tasty danish

iTrader: (5)

best for what? Power? money? Obviously the bigger engine will be best if all out power is the goal (20B). It's a good bit more expensive than a two rotor.

Barring that (or in most cases including that) the ultimate N/A engine is just like any other engine: highflow, light components.

so P-port. Well designed intake/exhaust, S5 na or RX8 rotors, RPM mods, etc. Big N/A ports don't typically street well.

All that said, I have a dream check list for cars/motorcycles I will own before I shove off. An N/A 20B is high on the list, but not soon.

snivley whiplash

iTrader: (4)

for all around streetability a good 13b 6 port racing beat intake and a good side draft carb like dellorto as well as a header and free flow exhaust will do the trick. if you want to have more do a street port on the engine first, but remember when you start porting for more power the streetability and daily drivability start to deminish. Just find a 13b, carb it well with good exhaust, and take it to 8500 it will work good for ya.

just my .02 worth but been working for me.

Joe

diabolical1

iTrader: (3)

this is not entirely true. definitely not so for a decent streetport. i can vouch for that. as for the other port-types and combinations, it will depend heavily on your methods of application. however, i base that on the work of others who have done it. it pretty much comes down to balance. if you plan to use the thing mostly on the street, you need to build it accordingly (port sizing, tuning, powerband, etc.)

rxtasy3

iTrader: (2)

^+1

streetport here too, and driven every single day.

theflatlander

iTrader: (3)

Snivley your view on streetability would apply to those who rely on their 7asa daily driver. For some streetable means it can be run off of pump gas.

arghx

iTrader: (3)

Even though it's in a relatively heavy chassis, you're not going to beat a Renesis for streetable power and a broad (by n/a rotary standards) torque curve.