all the places i look, i see everyone using forced induction... which i love, but i also like the smoothness and feel of the n/a rotary. i want to tune the rotary but all i hear is that you can't get anything big. could the motor push 300-350 to the crank with no forced induction?
thanks.

i doubt ur gonna be able to get those kinda of numbers but u deff could get an inprovment witout goin turbo... just do some reasearch i mean i just put a intake and i can tell theres a pretty good improvment already

No, with some work you may make 225 rwhp.

i feel some improvement. i just found a thread that talks about n/a. im gunna read it put already the frist couple of post say that make n/a 220. which isn't bad, for a 1.3.

300 NA would require a 20b type setup.

one of the reason why i want to know, im tired of people talking sh!t on the renesis. i know mazda built a great engine, and i want to prove to a lot of people that the engine can be tuned to high performance engine.

You may get close to 300 with the 16x. The 20b will exceed 300 n/a. I think the Rolex cup car is around 420. May be wrong though

The Rolex RX-8 cup cars are in the +400hp range.

425 @ 8500 rpms :)

http://www.speedsourceinc.com/index.cfm?template=mazdacars&section=mazda

It's so beautiful:

http://www.speedsourceinc.com/client_images/text/684_1.jpg

all the places i look, i see everyone using forced induction... which i love, but i also like the smoothness and feel of the n/a rotary. i want to tune the rotary but all i hear is that you can't get anything big. could the motor push 300-350 to the crank with no forced induction?
thanks.

You won't get those numbers without FI. And if you want to argue the merits of natural aspiration be prepared to be utterly incinerated - I tried it for five pages before I gave up.

I like N/A much better for some reason too. Some people just dont.


i doubt ur gonna be able to get those kinda of numbers but u deff could get an inprovment witout goin turbo... just do some reasearch i mean i just put a intake and i can tell theres a pretty good improvment already

An intake might land you 5hp? You have a sensitive butt my friend

N/A is great if you can get the power you want out of it. However, the renesis has a peak potential of somewhere around the 260 HP (at the crank) mark. The only way to make more power on this engine is to force more air down it's gullet I'm afraid.

I agree with everyone here, no way you'll see that kind of hp on an N/A Reni.

turbo it and you'll be all set. :)

I expect more power when I get more power, therefor it is everything I though it would be.

Well, if you reworked the intake and exhaust track, switched to custom lightweight higher compression rotors, upgraded most of your bearings, removed all the emissions equipment, and tuned to get your redline up to like 12k and raise your VE peak above 7k, you could conceivably do 300+ hp at the e-shaft. You would just need to find a way to make 160 ft lbs at 10,000 rpms. Then again, at that point, if you ever tried to drive the car in traffic, you'd probably shoot yourself.

peripheral intake and exhaust plus a tune, (and built intakes/exhausts specifically for peak hp) might get you close to 300 IMO - but it really won't be a renesis anymore when you're done.

the rolex cars are closer to 450 i think (with a 20b PP).

FI lets you get the power without major (internal) engine mods. (even though some might be helpful)

[edit: oh hey- posts before me saying similar things when i refreshed. I didn't explicitly think of a substantial redline increase, even less practical than my suggestions?]

With all of those mods it wouldn't really be a renesis anymore :)

I think the most practical way to significantly increase HP N/A without throwing away everything but the rotor housings would be to look at increased red line, and what it would take to sustain a reasonable amount of torque at those higher RPMs. You'd have a big challenge on your hands in terms of the intake, and I don't think much can be done to improve the flow through the intake or exhaust ports themselves.

^^^ and have a video camera handy

I've physically pushed a car with an n/a Renesis in it. Does that count? ;)

only if you pushed uphill

the rolex cars are closer to 450 i think (with a 20b PP).


Speedsource made 425 hp on their 3 rotor car while BK Motorsports was making 450 hp on the Courage. The reason for this was very good and purposely done. BK was running a closer ratio transmission and a higher redline than the Speedsource car. Speedsource purposely ran longer intake runners as a result. While they made less peak horsepower and at a slightly lower rpm limit, their powerband was broader and more suited to their gearing. Both engines were developed at the same time and place as each other.

There's far more to making power than just the engine itself. It's what you intend to do with it that really affects what it can and does do. There have been large bridgeported drag race engines that have topped 375 hp at over 10,500 rpm but their powerbands were VERY peaky.

Ray if your powerband keeps going up then you may actually want to think about fabbing up a new upper intake manifold that is longer to bring the peak back down. You should increase average power as well. "Should" being the key word.

I have my redline at 9,500 and we are going to turn it up to 10K soon. With the porting I have we still have not been limited by the factory intake box with the inner panels and one screen removed.

Did you port it yourself? I've heard rather disappointing results from early porting attempts on the renesis... that doesn't mean those people knew what they were doing though :)

RG porting special

trescientos hp? muy loco

200 lb./ft. of torque at 7,878 RPMs. Do the math.........:lol2:

WTF ? That's the same as the turbo guys are getting ???????

The powerband isn't rising. The torque band is widening on the top-end and rising from 3,500+. It was interesting to no longer see the drop-off in power at 8,800. You'll see when Jeff and I get the tuning details done and present the dyno sheets.

200 lb./ft. of torque at 7,878 RPMs. Do the math.........:lol2:

Very intriguing. I'll keep an eye on this thread...

200lb./ft wow.....WOW lol

The Rolex RX-8 cup cars are in the +400hp range.
Sorry. Mistyped and put 320. Fixed.

200 lb./ft. of torque at 7,878 RPMs. Do the math'

Horsepower = ((RPM)*(Torque))/5252

Quick math says your making 300 Horsepower N/A. Is that with Nitrous?

If your doing that totally N/A porting might become very popular very fast.

I think he pushed the wrong key .....

That's what I'm thinking too. I just didn't want to say anything. He'll probably edit his post whenever he has a chance.

Remember "Scarface"? "I was kidding, okay?"

MM and I wil post my dyno sheets and discuss the meanings thereof soon.

hahaha...you know we are all hungry for more HP!!! This was cruel joke :lol:

BTW I will send you another PM about my brakes :)

if u want to make a beast out of yer 8. ship it down to FL to pettit. get them to make yerz into there 500hp race car. it the stage 2 SC i think. with all the up grades u can think.
or go get a esmiril kit.
but it still all FI.
N/A go 3 rotor($$$$$$$$$$$$$$$$$$$$$$$$$$$$)

if u want to make a beast out of yer 8. ship it down to FL to pettit. get them to make yerz into there 500hp race car. it the stage 2 SC i think. with all the up grades u can think.
or go get a esmiril kit.
but it still all FI.
N/A go 3 rotor($$$$$$$$$$$$$$$$$$$$$$$$$$$$)

what is no for 1000 alex.. the stage 2 does ~ 300 whp.

esmiril kit has seen more than that..

beers :beer:

swoope, I can't believe you were able to decrypt any of the post above you. Very impressive work Scott.

swoope, I can't believe you were able to decrypt any of the post above you. Very impressive work Scott.

ahhhh,

clarity, i am sharp like tuna! you might have enjoyed my posts in the troll hunting days! ahh those were the days. ;)

beers :beer:

i want to see how this unfolds.

Should I post a video like Easy_E1 showing you guys what a maxxed-out tach looks like in action?

Would love that! (To have that ability and to see the video...). Is that part of the tune that MM gave him? Is it making power all the way up etc?... I have the AP and wouldnt mind a higher redline...

It's so beautiful:

http://www.speedsourceinc.com/client_images/text/684_1.jpg[/QUOTE]

VERY beautiful....

Also, those 425 HP out of a N/A 20B...you can be fairly confident that that's about as much power as they could possibly make. They do phenomenally precise tuning with those cars. There is always a theoretical limit of engine power capacity with a fixed amount of airflow, and I'm sure that is about that #.

Double post

Yeah that's all their going to get out of RB housings. Mazdaspeed PP housings make more peak less average.

how high can the renesis rev to without risk of blowing up? O_o;

how high can the renesis rev to without risk of blowing up? O_o;
10537

Is there anybody in Usa that has dyno'ed a ported Renesis engine on a Super flow or similar engine dyno? Here in Sweden i hope to be the first with a stage 0.5 streetport done by my companion Micke for 2 years ago. The engine set up is as follows:
1. 2004 Renesis engine streetported.Statically and dynamically balanced on a Turner machine.
2.Engine management Vi-Pec V44 with bosch igniters and 4 as today unknown coils. Upgraded injectors.
3. Shall be tested with 2 different intake combinations. Electric water pump to be used.
4. Hope to have 3 different headers plus the stock exhaust manifold with me on dyno day.
5.Test the engine with Shell V-Power 99 octane and E85.
6. Book 2 days on engine dyno and test test!
7. Why? Becausse i am a die hard rotary fan since the early 80s! And to learn more about the Renesis capabilities and have fun!

/Lasse

can't wait for the results Lasse - good luck !

The guy who created the thread wants huge horsepower with N/A configuration? Why dont you buy a corvette , not even a word of handling came out. If you want huge horsepower and huge torque it obviously needs big displacement for N/A , forced induction allows you to get more air that the engine couldn't have done by itself. Don't see why you want N/A power so much considering you have a 1.3 L , and a smooth powerband? Turbos and superchargers do that , of course its going to pin you back on your seat , its called power , the thing you wanted. lol

tuner in Japan (per friend of mine) has done 320 Hp with a na renasis--BUT custom intake, exhaust, motec system and i suspect needlebearings. i dont know much about it.
olddragger

^ I have heard the same thing. I believe it's knight motorsports.

can't wait for the results Lasse - good luck !

Thank's Brettus! I have at least 3 engines to do before i have the time to assemble and do the wiring and so on. A friend of mine is building the headers. Plan is to dyno test with the stage 0.5 porting and the dissasemble and do a double bridge port to the outer side plates:) Then go to the dyno again...:uhh:

/Lasse

tuner in Japan (per friend of mine) has done 320 Hp with a na renasis--BUT custom intake, exhaust, motec system and i suspect needlebearings. i dont know much about it.
olddragger

The Japanese is at forefront when it comes to N/A engines i believe. Never heard anyone else do needle bearings on a Rotary. Powerwise with ML Wankeltrim flow to hp the RX-8 engine with the stage 0.5 portjob is capable to 318 hp:Eyecrazy: That is without an intake manifold. Hope to have the engine on the dyno before Christmas:uhh:

/Lasse

I'm looking forward to this.