Just looking to see what kind of power you can make on a 13b N/A rx7 engine.

just out of curiousity.

Also,
What would you need to acheive this power

 

high compression rotors and porting is a requisite.

BTW, you should post this under "Naturally Aspirated Performance Forum" under the Rotary Car performance section

 

you'd have to specify port-type to get ballpark figures.

and yes, why is this in the Gen III section?

 

RX-8 rotors would be nice since they have 10:1 compression ratio.

thewird

 

for a so-called "streetable" setup, expect 160-180rwhp or so depending how you build it. you can get enough power for actual track racing but for drag racing it's not going to fast easily without more extreme setups.

 

You could go N/A 3 rotor, that would run well. 300+ HP with a simple setup.

Note: Yes, I know you asked for 13b :P

thewird

 

A well prepared SCCA legal E prod motor will make between 230-260 hp at the flywhell, depending on intake( Carb vs. FI ) and exhaust. This would be a large street port, intake and exhaust port matched etc. This translates to 200-230 hp at the rear wheels.

 

GTORX7 Just made 216whp on a streetport.

That's 40 more horsepower than most RENESIS engines put to the ground, which is fricken impressive. That guy knows his **** N/A.

 

Peripheral port and serious weight reduction

 

That is impressive but don't discount a Renesis. It's still a far superior engine. A pre-'09 motor when tuned right can hit right at 260 fwhp (230 rwhp) and at least one '09 stock Renesis has been tuned to 280 fwhp. It's better than most realize. The unfortunate thing is that the RX-8 is way too heavy and that it's tuned like crap in that car. Then you get more of the tuners who can't seem to get much better for some strange reason. You get someone that knows what they are doing and that motor is a dream come true.

 

It never seems to amaze me that every time mazda debut a new chassis/engine combo so does a number of 'Rotary' experts come out of the woodworks also.
The number of those 'experts' for the renesis from the looks of it are going to surpass the 'experts' for the REW/FD's!

 

Come back to RX-8club Rotarygod!!

The best N/A dyno I've ever seen on a renny is 220whp, from teamrx8.

Do you have a link to those 280whp dynos? I'd be elated to see that this engine can get there, my broke *** renny puts down 152whp no one can figure out what the hell is wrong with it...new plugs, coils, etc...good compression....20k miles...

 

Just because someone hasn't posted a dyno on some forum somewhere doesn't mean it hasn't been done. Forums are little pissing contests anyways. Team doesn't have the most power even though he thinks he does. He's not bad though.

Chris take all the shots at me you want. I've got nothing to prove to anyone anywhere and I could care less what anyone thinks including you.

 

I think this guy wants a street car anyway so talking about race engines is mute

thewird

 

deleted-wrong place

 

Chris if I took that wrong I apologize. I went back and re-read that.

 

to put this in a little perspective, the competition manual from 1979 lists the 12A PP power at 260 flywheel hp. its also loud enough that you can hear them start it up across the paddock, DURING a race. it also wont meet any kind of emission standards.

for a street car, where you might need things like mufflers, and converters (i live in CA, every rx7 ive ever owned has legally passed smog), the renesis is a great choice...

 

what modifications would you have to do to make RX8 rotors in a n/a 13B? Would the eletro-shaft have to be moded?

 

apparently the stock Renesis apex seals don't take kindly to peripheral exhaust ports, so you'd need to have the apexes modified to use older apex seals. side seals will need to be clearanced for use with the older engines.

if by "eletro shaft" you mean eccentric shaft, then no.

 

also i believe the corner and side seals are in a different place on the renisis and they could fall into the port on a small street port if it isn't done right.

 

Actually the Renesis side seals are moved further out which allows you to run larger ports that open much earlier.

 

sorry about the type-o add sucks where am i again?