Raptor75

I remember reading somewhere that the Renesis engine was originally developed with the capability of putting out 280hp without forced induction. Can anyone shed some light on this or is my mind playing tricks on me?

yiksing

Yes, switch on your Playstation 2, start GT4 and play in arcade mode. A stock RX-8 has 283 hp when you start the time trial, I'm surprised too.

Glyphon

i believe that was what was stated for the rx-evolve, the prototype rx8. it has been detuned for (i think) emissions reasons, and possibly long term reliability reasons as well.

DailyDriver2k5

Isn't that Evolve only available in Japan?

Glyphon

i'm pretty sure its not available anywhere. it was just a pre-production design for taking to autoshows.

zoned

I want my 50 horses!

trustbuddy

iTrader: (3)

tiggerlee

Here now quite your whining.

Raptor75

That would be my guess also. It would be interesting to see what the differences are between our cars and the prototype. I bet the damn engine management system is hobbling this car big time.

Renesis_8

Its probably capable, someone needs to open the renesis and give it a nice port, use a motec, put it on an engine dyno and show us~
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Ike

I don't know if the Evolve ever really had 280hp, it was what Mazda was aiming for though.

http://media.ford.com/rx_evolv/

zoned

LOL. I was joking!


Aside to mazda : If you wanted to give me 50 more horses, i wouldnt turn them down ;-)

rotary crazy

it was stated by mazda that the prototype's rx-8 renesis engine was putting out 280 hp, but it was a very diferent engine, one feture that can be seen in the prototype engine was the twin troutle body set up and 11,000 rpm tach with 10,500 rpm red line, but this was said by mazda and we know what mazda says about hp.....

it was also stated by several of mazda's people thet the renesis was as powerful as the last gen rx-7 that had 280 so.......

Raptor75

Interesting, even with 280hp they were still looking at only 166 Ft/lbs of torque.

rotary crazy

yes, because the way it made this was by better breathing at hi rpms

look, i ask this same question to somebody well conected to mazda and what he found out was that the air intake system in the evolve and the rx-8 prototype was too complex and it was too expesive for mass production

if you see the oficial renesis dyno from mazda you see that power starts to fall of after 8500 rpm it is speculated that in the prototype's engine the power line keeps going up to 9000+ rpm

Rotary Rasp

iTrader: (2)

Crap…. Only 2755lbs?

And 19 inch rotors!

cleoent

oh man, 280 hp, 10.5k rpms, damn that would have been hot.

KYLiquid

I have heard that said in the US market where the rx7 FD made it to 25xHP from the 13B-REW, we didnt get the 96+ when the FD had 280hp.....

The road racing RX7s run a motect system, custome intake and header back exhaust with no cats, the car is in a mild tune state using 100+ octane, I would like to see what one of those could dyno at the wheels. Ive heard its making about 260hp on an engine dyno.

Also the star mazda series cars run a motec and a STOCK renesis engine with a open header/collector muffler design and differnt intake and race gas (not sure what octane)..........Ive heard this combo ALSO makes about 260hp on an engine dyno.

The road race car I was talking about is using the same 6spd trany and same length exhaust pipe, so it would be very similar to what you could do with a road car using basic bolt ons and the x-interceptor ecu.

I think that if you got the best of the best for parts :

Intake, Header, Exhaust, Pulles, Flywheel, Syn trany/diff fluid, plugs, wires, x-interceptor ecu, ect....

you could get around 280hp at the crank with this motor, maby on pump gas (93) but definetly on race gas.... that would be about 240hp at the wheels, of course you wouldnt get much of a tq boost staying NA, but it would be a nice kick in the pants.

Renesis_8

I think the best place to look for the potential hp for renesis is the star mazda engines. They have so many of them, someone must have some information!! Yet i've heard none...
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KYLiquid

at least the gave it the largest/most powerful brakes ever put on a production japanese car, thats right....the rx8 has better brakes than the R34 skyline, supra or rx7/

Ike

Even with a $5,000 motec I don't think you're going to hit 240 at the wheels without FI, a really risky tune, or nitrous. Quite frankly, hitting 240whp (think stock Z) with thousands of dollars in mods is pretty pitiful. Would make the car a lot more fun but it's just not a rational thing to do.

Ike

The RX-8 brakes are damn good but lets not go overboard...

KYLiquid

i know its one of the 2, at the time the rx8 was launched (03 in japan) it had the largest or the most powerful (one of the 2) of any mass-produced japanese car ever. I dunno if its still true now, but at the time it was.

KYLiquid

i think 240whp is the limit for the rx8 NA, that would be around 280hp at the crank......it would be a lot of money to get there, but I think it could be done, not sure if its possible on pump gas.....but im sure it could be done on some higher octane race gas. If it does need race gas its kinda pointless for a street car, but im sure 240whp is possible NA (no nitrous) but it would be a tough goal, and I think the max.

I will agree that it doesnt make any sense, for half the cost you could go turbo and get over 300whp, and for the same cost you could swap over to a 13b-rew, or pretty close to the same cost......

does it make sense, no

is it possible, i think so

PhotoMunkey

Guys
The 11,000 rpm Toyota Formula Atlantic engines built by Hasselgren Engineering in Berkeley, CA make around 315 hp at the flywheel. I just did a story on one for Banzai Magazine ("Formula First" April 2006) that one of their engine builders installed in an AE-86 Corolla. Detuned for his car it makes 280 hp.

If anyone has the money, give Hasselgren a call. I'll bet they can make a Renesis scream!