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2003 - 2008 Mazda RX-8 (rear)
The first version of the RX-8, chassis code SE3P, was produced from model year 2003. It is powered by the RENESIS 13B-MSP (multi side port) Wankel rotary engine displacing 1.3 litres non-turbo (1308 cc). At launch, the RENESIS was available in standard and high power versions. The 4-port standard RENESIS produced 210 hp (160 kW) and was coupled with either a 5-speed manual or 4-speed automatic transmission. The 6-port high power RENESIS was only available with a six-speed manual transmission and was rated at 250 hp (190 kW). For the North American market, Mazda revised the reported output rating of the standard and high power RENESIS soon after launch to 197 hp (147 kW) and 238 hp (177 kW), respectively.[2] With exhaust ports now located in the side housing, the RENESIS boasted improved fuel efficiency and emissions rating over the 13B-REW employed by the last RX-7, thereby making it possible to be sold in North America.
At launch, the RX-8 was available in various models in different markets around the world. Standard models include: 6-speed manual "High Power" with a claimed output of 184 kW (250 PS; 247 hp) and a 9,000 rpm redline (Sold in North America). This model was equivalent to the "Type S" trim in Japan. 5-speed manual "Standard Power" tuned to 141 kW (192 PS; 189 hp) with the redline reduced to 7,500 rpm. This powertrain combination was not available in North America. 4-speed automatic tuned to 141 kW (192 PS; 189 hp) in some markets (NZ), while the U.S. automatic is stated to deliver 158 kW (215 PS; 212 hp) . 6-speed automatic (available in the U.S. market after 2006) developing 158 kW (215 PS; 212 hp) and 159 lb·ft (216 N·m) of torque with a redline at 7,500 rpm.[3] This was the revised standard RENESIS, now with two extra intake ports like the high power version.
Automatic versions all had low output/low rpm engines due to the lack of availability of a transmission that would reliably turn 9,500rpm
And that is just for starters. There were also published numbers for the MT of 235, 232, and 228.
But that's just published numbers at the crank or flywheel. Then there is what the car actually puts out on the dyno, which, if fully healthy is around 180-190whp.
But most RX-8s are decidedly unhealthy from lack of proper owner care, either through compression loss, lubrication problems, ignition degradation, catalytic converter restriction, sensor fouling or failure, etc... There have been "totally stock" MT RX-8s put down numbers as low as 140whp on a dyno, just from being in terrible condition.
Sorry to revive the thread on such a simple topic but surprisingly i couldn't find concrete answers on the internet to this question. i have a 2007 rx8 6 port 6 speed manual rated at 238hp from the factory, BUT that is CRANK horsepower correct so when i have my car dynoed ~190 is the NORMAL number i should see for a healthy engine correct. Basically what im trying to figure out is that around 190 to the wheels is a "healthy" number and i can rest assured my engine is "good" for now lol.
Sorry to revive the thread on such a simple topic but surprisingly i couldn't find concrete answers on the internet to this question. i have a 2007 rx8 6 port 6 speed manual rated at 238hp from the factory, BUT that is CRANK horsepower correct so when i have my car dynoed ~190 is the NORMAL number i should see for a healthy engine correct. Basically what im trying to figure out is that around 190 to the wheels is a "healthy" number and i can rest assured my engine is "good" for now lol.
Sorry to revive the thread on such a simple topic but surprisingly i couldn't find concrete answers on the internet to this question. i have a 2007 rx8 6 port 6 speed manual rated at 238hp from the factory, BUT that is CRANK horsepower correct so when i have my car dynoed ~190 is the NORMAL number i should see for a healthy engine correct. Basically what im trying to figure out is that around 190 to the wheels is a "healthy" number and i can rest assured my engine is "good" for now lol.
Yes
I would like to add on to this....
190whp, even on a MT car, is pretty high. If the car is 100% stock you will get a number like that if you have a nearly new motor.
On a 6 port auto, expect just a little bit less than that with a nearly new motor.
Below (sadly) is a 4 port 4 speed AT Rx8 with a Mazda reman installed only 6,000 miles prior, with Mazdaspeed/AEM intake, RB header, gutted cat, Magnaflow catback, upgraded coils, everything I could do as far as bolt-on mods are concerned besides nitrous or turbo/supercharged.
PS: Desert Glory FTW
Last edited by Ricky SE3P; 06-19-2019 at 11:22 AM.
Sorry to revive the thread on such a simple topic but surprisingly i couldn't find concrete answers on the internet to this question. i have a 2007 rx8 6 port 6 speed manual rated at 238hp from the factory, BUT that is CRANK horsepower correct so when i have my car dynoed ~190 is the NORMAL number i should see for a healthy engine correct. Basically what im trying to figure out is that around 190 to the wheels is a "healthy" number and i can rest assured my engine is "good" for now lol.
That's not really how you use a dyno but sure.
Depending on the dyno it could be 160 and be fine. Some dynoes are more optimistic than others.
The dyno is useful for a relative comparison when you want to know the effect of a mod so you have a graph that shows that, say, a tune gave you a 10% increase. The absolute values are pretty useless by themselves.
Can help you here.
I have JDM 4 speed auto and have converted it to 6 spd manual.
We did a dyno run as a standard 4 spd 4 port auto and it was hopeless.
We then did a run on the same engine but with a 6 spd manual installed no other mods.
Then a decat and tune etc. Manual in colour, auto faint. Decat and tune Manual
All figures are Wheel horsepower and Wheel torque - i.e. what it's actually putting down at the wheels, no run down fudge calculations.
Last edited by juey; 02-24-2021 at 11:33 AM.
Reason: spelling
Yep, in terms of peak numbers the auto box costs 15-20% torque and HP at the wheels.....and in the real world you're also less likely to be in the power band due to the long gearing.
Basically, if you want more power out of your Auto RX-8 convert it to manual and hey presto a 20% increase at the wheels.
horsepower?
05-02-2011, 09:06 PM
such a loaded question...
