We Want More Power

[89Turbo944]

It is less than 240whp. A friend of mine dynoed one at BCIT. Was around 220 or so.

Second, y are you all complaning, the car is quite amazing for what it is (a glorified 4 door family car). Mazda was not trying to take on the likes of the 350Z or EVO. Rather provide a semi sporty car that is functional.

If you want turbos wait till the new RX7 hits the market. Should be fun, 2 door, light weight, more power. And yes 10:1 compression is fairly high compared to the 7.5-8.5 a turbocharged car would run. You can run 10:1compression ratio but the first ping you have there go your apex seals. You have to be very carfull at that high of a pressure.

[nvrenough]

I agree with 89turbo. Mazda isn't trying to corner the market with the RX-8, but it is a damn fine car. According to Car and Driver the
RX-8 is one of the best Japanese sports cars on the market at the time. For the price you can't beat the performance.

[89Turbo944]

Exactly. The thing handles like it is on rails, It looks........intresting. And is a blast to drive. What more can you expect from a company that gave up on developing performance vehicles for the North American market till reciently. I think they did a good job for an interily new engine.

[PRnPimpin]

Originally Posted by RX-8SpdDmn

Everybody is looking to forced induction to increase power. Has anyone thought of a 3-rotor Renesis engine?? How much harder would that be? 150% of the power, with the slightest weight/size increase, and you still retain incredible throttle response (read: no turbo lag)!

3 Rotary = Illegal. I can't confirm the source but it's just illegal for many reasons.

Are RX-8 is dwarfed because of emissions. In Japan, this car probably screams because they are less restrictive. When I get mine, all I know is that I'm visiting my uncle at the DMV to pass me.

I'm not exactly sure how a cat. converter works but someone said if the emissions are too cold it doesn't work? We gotta be able to tune this thing some how.

[89Turbo944]

3 Rotary = Illegal. I can't confirm the source but it's just illegal for many reasons.

Y is it illegal? Basicly ou are saying that adding another 3 cylinders to the engine is illegal. Last time i looked there wasent a law on the number of cylinders a car could have.

Second a catilitic converter uses a catlist that heats up and burns off hydrocarbons(unburnt fuel), NOx, and CO. All new cats have different types of catalysts, a reduction catalyst and an oxidization catalyst.

The ruduction catlyst preforms a chemical reaction with the NOX and CO to basicly neutralize it. The Oxydation catlyst handles mostly the hydrocarbons by burning them off.

[Be Fri]

Is it possible to turbo it at a High compression ratio? It does take compression to make horse power. I believe that you just run lower boost but still be able to get horsepower out of the turbo. I am currently working on putting on a turbo on my car now. Plan on putting a single turbo, putting about where the battery box is now....with engine management....but I'm concerned on how much the engine can handle. I have dyno my car, only 180hp to the ground. I have a cat-back exhaust and that's it. The car also showed that it was running lean....not sure why....

[89Turbo944]

Yes it is possilbe to turbo a high compression car. You just cant boost vary high. A turbocharger basicly raises the cars compression ratio.

[eckoman_pdx]

I am not an RX-8 expert, but 180whp after a cat-back is low...normally, don't they dyno @ around 188 stock? The hp is low probably becuase it's running lean (that's never good).

Anyways, 89Turbo944, good post on how the cat works.

[89Turbo944]

Thanks.

Ya 180 does sound kind of bad. Y was your car running lean. Lean kills rotaries!!!

[eckoman_pdx]

Originally Posted by 89Turbo944

Thanks.

Ya 180 does sound kind of bad. Y was your car running lean. Lean kills rotaries!!!

Ya...this got me thinking, I would think the cat-back void the warrenty on the car also. If they are nice they'll only void it from the cat-back. Either way, I agree with you, and I'd take car of it ASAP.

[89Turbo944]

I dont see whay the cat back would cause the car to run lean. Cause you are really not allowing the car to flow all that much more. But it is possible that the Ren needs more backpressure to run properly. Dont know alot about the Ren but take off the catback and redyno it and check you AF.

Dont worrie about the warantee to much tho. Dealers cant officialy void your warantee for simple bolt ons. There was a legal battle about it and dealerships lost. But if you do mess with the ECU and they find out you are screwed.

[eckoman_pdx]

Originally Posted by 89Turbo944

I dont see whay the cat back would cause the car to run lean. Cause you are really not allowing the car to flow all that much more. But it is possible that the Ren needs more backpressure to run properly. Dont know alot about the Ren but take off the catback and redyno it and check you AF.

Dont worrie about the warantee to much tho. Dealers cant officialy void your warantee for simple bolt ons. There was a legal battle about it and dealerships lost. But if you do mess with the ECU and they find out you are screwed.

Really? So suspenion, intake, exhaust, header, etc...won't offically void the warrenty? Of course, I am guessing it will void the parts warrenty you installed (like an intake would void an the warrenty as applied to intakes). How do you get them to live up to this, I am curious. Where can you find more info? I am interested in this, and I know others who would be. No one wants to void a warrenty because or an I/H/E and some shocks and springs.

[89Turbo944]

Im not sure where to get info on the perticulars. But yes the dealer will not replace any broken aftermarket parts that brake. The only way they can void your warantee due to aftermarket parts is eather, your mod caused a direct problem with the damaged component, or you modify the internal workings of the car.

Best thing to do would be to go to your dealer and aske. They will usualy help you pick the parts and in a lot of cases they will even hepl you install them. If you have the dealer install them and still have a problem then you can go back to the dealer and have them fix it.

Shocks, springs, and components will not void your warantee. But like i said before, if they brake the dealer will not replace the part.

[PRnPimpin]

So let me get this straight with the exhaust system. With the renesis engine, if everything flows out of the car too nicely due to an unrestrictive exhaust system, it'll actually cause a decrease in HP because of the lack in back pressure?

I read in an automotive magazine I have, the Rx8 was test driven by Rx7 drivers, and the only mod the Rx8 had was a cold air intake, which gave it a nice kick. Maybe they didn't do the rest of the exhaust system for back pressure reasons.

[Jared_80]

Originally Posted by Doug McGill

ya 280 under the f u c k i n g hood j a c k a s s ! to the wheels like 240. oh my god.

Are you realy as dumb as you sound or is that just an act???? It is 240 at the flywheel. No RX has made 280 since the J-Spec RX7, learn this stuff BEFORE you come here and confuse the noobies.