[Brandon - TX]

But some are saying that the ecu is programmed to run rich until it reaches a certain point and then switches maps. But one was dyno'd at 2200 miles and still put down 180 whp. Interesting.

discuss

 

[OmniFocus]

Whoa. My Omni puts out 20 more ft lbs to the wheels... stock.

 

[Ozmotear]

Was it an Auto? (207hp)

 

[Kool_ZX3]

The torque looks right since it only has 159 or something stock on the 250Hp engine but that Hp is way off and i mean way off

 

[TXFO]

why would you have a break in fuel map? it dosent make any sense to run rich for the first X amount of miles. sounds like BS to me.

 

[Ray]

it's NOT the automatic, that revs to 7200 rpm only and doesn't allow the second intake ports to open.

but these numbers (hp primarily) seem low low low.

maybe it's a fluke?

great. i really want one of these too.

 

[ZX3guy182]

if its true, here comes my 350z. I was really thinking about the rx8 lately too.

 

[Egz]

I've been reading up on this as well. One other thing to remember that this isn't just one car. I think there have been 3 separate ones, with 500, 1000, 2200 miles on each.

I hope an answer rises up soon.

 

[CamsMach]

Beside focaljet I also visit RX8club.com, where all this dyno talk is going on.

Here's what someone at Rotarynews.com who has contacts with Mazda was told.

"I talked with Kelvin Hirashi, Director of R&D at Mazda about dynoing the RX-8 on a chassis dyno. He said don't do it until well after 1000-2000 miles have been put on the car, and the engine brakes in. . . "Said" is even the wrong word, he "implored" me to brake it in first...

So, get out and brake those engines in, and then retest them at, say, 5000 miles."

http://www.rx8club.com/showthread.php?s=&threadid=7976

 

[njfocus]

<font color="blue"> from what i read in either superstreet or scc they sd that the 2nd intake ports were stuck closed and weren't giving the extra flow they were supposed to choking the engine at the high revs.....they then went on to say that most of the test publishers cars were having the same issues..maybe they were never resolved.....but i love them almost as much as the evo 8 </font>

 

[spankenstein]

Becuaes RX-7's had that. There is a 20,000 mile switch (a thrid odometer in the gauge cluster) and I think the fuel maps and idle changed after 20,000 miles.

 

[Brandon - TX]

20k seems WAY to extreme, try 2k or so. Not getting full power until 9 months give or take from purchase date brand new is laughable at the least

 

[TXFO]

there are absolutely no benefits to be had from changing fuel maps unless it is a learning process. like a stock program that adapts to operating conditions. running rich leaves engine deposits, and lean increases engine wear. what is the upside to doing either of those 2 things during a break in period?

 

[CamsMach]

Njfocus, the Rx8's with the stuck ports were not production models.

 

[Egz]

Well, Mazda just changed the HP figure to 238 for the MT.

http://forums.vwvortex.com/zerothread?id=992846

 

[emulous]

This is the more important link:

http://www.mazdausa.com/MusaWeb/displayPage.action?pageParameter=modelsSpecsSpecs&vehicleCode=RX8

They've updated their website with the new numbers.

At least they are offering to buy back cars, just like they did with the Miata.

 

[Maxximtl]

This is actually the 2nd time Mazda has gotten into trouble on misrepresenting HP figures. It happened before when the M2 Miata was released. Just like now, Mazda is offering disgruntled owners a rebate, or will take the car back.

I have to assume that they knew all along that the engine didn't meet specified levels of output. Hell, half the reason people are buying the car is because of the engine. It was foolish and irresponsible of Mazda to intentionally con customers into thinking they were buying something that they are not. Granted, they are saying the discrepencies aren't that large, but the dyno seems to say something else!

 

[Jared]

yeah, and this has got to be really bad for the reputation of the rotary. i mean a lot of us, including myself, love that engine, but to take a gamble and bring it back onto the market in front of consumers who never really took to the idea of a rotary engine, and now this happens? not good for business

 

[OTTOMATIC]

Well, Mazda just changed the HP figure to 238 for the MT.

http://forums.vwvortex.com/zerothread?id=992846

238HP at the engine, down to 179 at the wheels

That's a 25% loss of power to the wheels? Doesn't that seem excessive?

 

[Kool_ZX3]

I think the new model will have engine updates to fix this problem and a turbo option, but that's just me