Was curious what people have done to beef up their NA rx7's , or what you would your build would be like if you were to make one. Just wondering whats out there and the possibilities .

 

 

<iframe width="420" height="315" src="http://www.youtube.com/embed/Og2G4FkuL0w?rel=0" frameborder="0" allowfullscreen></iframe>

 

<iframe width="420" height="315" src="http://www.youtube.com/embed/_Ag7ba1gcL8?rel=0" frameborder="0" allowfullscreen></iframe>

 

seriously though, 13b cosmo plates, bridgeport, s5 n/a rotating assembly, 3 window race bearings, turbo flywheel and clutch, haltech e8 on e85.

 

If I were forced to keep my FC n/a forever, I'd just forget about big power. Make sure the auxiliary ports (and VDI if applicable) are working right, K&N drop in air filter, and a nice sounding exhaust. Focus on the suspension and make it fun to drive on twisty roads/tracks. if you get serious about it, maybe look into a lightweight flywheel.

Sure, you could make big peak power with a huge port, but engines like that aren't really suited for anything other than race tracks.

If you do want to make big n/a power, swap in a 20B. Perhaps built with a mild port and RX-8 rotors.


Or... you could do a basic TII swap with a couple bolt-ons and proper engine management and have some fun.

 

As additional reference, this link will be helpful.

http://i30.photobucket.com/albums/c3...icah-gif-1.gif

 

hkp >> Why would you want e85 for any NA application? 10% less energy/volume... ugh.

NA rotaries can't even max out 87octane.. [Save the Renesis, but I'm still curious about that one...]

marcusdevine >> My engine: S4 NA plates, S5 rotors, S6 housings, Pineapple sleeve inserts, air pump activation for aux ports. It feels amazing compared with a stock S4. [Still running S4 intake for the moment... Eventually it'll get S5, once my turbo project is done]
Exhaust: FULL Racing Beat [header-presilencer-catback]

 

Here are some of the previous and oft-referenced "Beefy NA" threads:

https://www.rx7club.com/2nd-gen-arch...dations-31410/

https://www.rx7club.com/2nd-generati...thread-706469/

 

Yep, try searching for "Beefy N/A" excluding this thread...

 

you just need more money

 

Wut hee sed

 

engine series doesn't matter(iron ports will be filled anyways) because for real power you need a peripheral port, custom intake/throttle body, EMS, ceramic seals and full custom exhaust.

looking at about $10k for 300ish horsepower to the wheels.

how many rotaries do you see dicking around with side ports making gobs of power? because straight in/out is the easiest compromise without the need for rediculous varying length port runners at various RPMs(think 13B-MSP, which incidentally is very tough to push much beyond 240-ish whp).

it's cheaper to get power from forced induction, even if you have a mild goal of 200whp naturally aspirated.

but if you got $15k burning a hole in your pocket i have a much better way to get power if you want to stop by the shop. it's called adding rotors("there is no replacement for displacement", man i haven't said that since i was a kid! but it seems most big shops are moving this way as the limits of the 2 rotors are reached and rotaries respond very well to relatives coming by to stay with them). keep in mind adding rotors is no easy task, the engines aren't modular but i am working on making them a bit more versatile in that aspect.

 

Went through discussions with my mechanic about it, and we planned out for the following as the project for my car, things like larger street port, ITB, ceramic seals, custom intake manifold, full exhaust, megasquirt for ECU (street car, otherwise he would use microtech for racing purpose), and a bunch of other things I can't recall at the moment.

He said the power output would be around 260 hp.

 

I've only seen one guy get close to 200whp on streetported na. This was kahren on the forum,

Getting huge hp would take some kind of extensive porting (bridgeport/peripheral porting) and wouldn't be very street worthy.

 

Pport is very is very streetable, its just louder than most people like to put up with on the street.

 

yes, a beefy n/a really isn't a car you drive around town.

look around at all the n/a rotaries that make any decent amounts of power and they are all PP or semi PP. even a bridged 4 port may get mid 200's but that's still chicken scratch and not what i would call "beefy".

 

If your car is loud as hell and/or shooting flames, its probably not a good idea to drive it on the street.

When i think "street car" i think of a car having decent low-mid end power and having low exhaust tone, not being obnoxiously loud. Both of which are completely sacrificed with a peripheral port.

Getting 200 hp at the flywheel on.a streetport is very hard for a 2nd gen na, nevermind 260, highest I've seen was 195 whp by kahren and thats about 230 flywheel, there's no way your gonna make 260 unless you're using rx8 rotors.

As rotary-evolution said, the best bet is to make it a 3 rotor then realistically you'll easily make close to 300hp naturally aspirated.

 

Then there's the fact for a lot of people our cars arent our dd's so I say go wild on the motor if u can afford it.

 

cooling mods and mods that reflect heat will help along with intake and exhaust flow mods i have a s4 half bridge with full suspension and big sticky tires. super fun super and reliable.

but i have encountered problems with the stock wiring and fuel system CLEAN YOUR GAS tank i had a problem with the car running out of power when the secondary injectors came on i tried every thing new injectors new fuel pump ground rewire. the whole time it was the gas tank full of sand at the bottom clogging up the fuel filter and strainer. i tested fuel pressure countless times but that was not it i had pressure every time what i was lacking was flow. lesson learned

 

I've seen a few threads from people making a bit over 200RWHP on an NA setup with a streetbort build on TII plates. Noise control might still be a bit of an issue. The 6-port setup is just too restrictive.

 

My mechanic has a 12A that made 299.5 at flywheel on the engine dyno, he said he will be racing it down at Portland in mid August.

For 13B, streetport is 285hp, 230rwhp; bridgeport 320hp, 250rwhp; peripheral 330hp, 265 rwhp. These are all dynoed.

I'm asking him about the dyno sheets, you guys can check out his website and call/email him to ask about it.

SA Motorsports | Winning races one triangle at a time!

 

hmmmmm........