RX8 out Ran My FRS (Rotary Vs Flat 4)

[DarkSunrise]

Came across this recently. Thought it might be interesting to see an RX-8 and GT86 tested on the same dyno (Supersprint's MAHA brake dyno). The RX-8 revs much higher and makes an additional 12-13 peak hp, but surprising (at least to me) how much more torque the GT86 made in the low/mid-range. About 50-60 N m (40 lb-ft) more torque from 2100-3100 rpm.

[swift996]

I use to have a RX8, I clipped a 14.4 with it in the 1/4. Had some wider tires and intake/exhaust. Loved the car, handled great, but getting 17mpg without a lot of go got old. Rotary engines have several advantages vs a piston engine. The flat/boxer engine is the next best thing to a rotary IMO.

[Wolfe]

RX-8 1.3 liters. Automatic does not redline as high as the M/T. All the power is in the high end RPM of the 8. Its probably the worst automatic sports car for that reason and the fact that it will not clear carbon as well causing premature engine failure. RX-8 and FRS are for the track. Stop drag racing them! making us look bad! haha.

[zc06_kisstherain]

OP is heavier? just say it to your friend your car is super faster.
no drag racing on street.

[Ganthrithor]

Lol, you'll beat him on the second run though when he runs out of gas.

[Shredicus]

Originally Posted by GT-ROKIN

After an argument about which car is better, my friend who owns a 2006 Mazda Rx8 VS my FRS.

1/4 Mile Run

On the launch i was a head for like a few second in sport mode using the paddle shifters perfectly, but for some reason i can feel my car maxing out and not moving a fast as i think it would, on each gear high revs and that feeling of getting tossed back in to the seats was missing. i felt oddly out of place.(Felt like i was driving a Hyundai). However, the RX8(also AT W/Paddle Shifters) took the victory by one car length +.

HIGHLY DISAPPOINTING!!

I dont know if this might be a flaw in my car, or the it has some thing to do with the ECU or Tranny / something else.... any ideas?

Or Rotary Engines Totally Have the upper hand (which i refused to believe)

The one with 75 more horsepower or the one with 150 more?

[civdaddy]

I don't know why people are bashing them for racing their cars because they are both slow. If its a close race, it's always fun in my book.

[ZDan]

Originally Posted by roadtrip1098

Keep in mind a rotary motor is smaller, and the cylinder fires 3 times every rotation where a single cylinder conventional motor fires once every two rotations.
So with a 1.3L Rotary you get 1.3L 3 times per rotation so that's 3.9L per rotation

Not exactly...
Each rotor only fires ONCE per crank rotation. Three times per *rotor* rotation, but rotor rpm is 1/3 crank rpm.
If it's a 3.9 liter, it's a 3000rpm 3.9 liter, as that's the maximum rpm of the rotors.

In an H4 2.0 you get 2 cylinders firing per rotation at .5L each so that's 1.0L per rotation.

Yes, and the 13B rotary engine displaces 1.3 liters per crank revolution.

Like a 2-stroke, the rotary displaces its full displacement every crank rev. This is an advantage, but really more like a 1.5x advantage rather than 2x due to inherent rotary inefficiency (throws away energy as heat like CRAZY).

So a 9000rpm 1.3 liter na rotary ends up roughly comparable to a 9000rpm 2.0 liter piston engine. 13B ~ F20C. But not quite... F20C makes a little more.

[Adeets]

Originally Posted by GT-ROKIN

After an argument about which car is better, my friend who owns a 2006 Mazda Rx8 VS my FRS.

1/4 Mile Run

On the launch i was a head for like a few second in sport mode using the paddle shifters perfectly, but for some reason i can feel my car maxing out and not moving a fast as i think it would, on each gear high revs and that feeling of getting tossed back in to the seats was missing. i felt oddly out of place.(Felt like i was driving a Hyundai). However, the RX8(also AT W/Paddle Shifters) took the victory by one car length +.

HIGHLY DISAPPOINTING!!

I dont know if this might be a flaw in my car, or the it has some thing to do with the ECU or Tranny / something else.... any ideas?

Or Rotary Engines Totally Have the upper hand (which i refused to believe)

The fault is in the owner, who the hell buys an automatic sports car?

[sosick]

Originally Posted by RowTarEEE

The FR-S should eat an automatic RX-8 alive. Now, a manual RX-8 with comparable drivers will beat a manual FR-S/BRZ every single time. Don't know how you lost to that RX-8. Source: I have both cars

? someones on crack. i take my buddys rx8 all day. just this friday we were on the highway and i was behind him we both stayed in 6th and i actually passed him about 112mph from behind him n i had to go around him.

[sosick]

Originally Posted by RowTarEEE

I have a series 1 MT '04 RX-8 which quoted 14.3 at the 1/4th. In this article from caranddriver, 14.5 for MT. " the RX-8 scooted to 60 mph in 5.9 seconds and through the quarter-mile in 14.5 seconds at 96 mph." You are quoting the series II RX-8 R3 which is heavier. Besides, the OP raced an automatic RX-8, which is significantly slower than a MT with only 7,500RPM redline

http://www.caranddriver.com/comparis...da-rx-8-page-4.

u guys are looking at pro drivers....

[6speed_Sam]

I raced a nice, clean mt rx8 twice one night (before my header/unichip) and beat it both times. They are nice cars.. some are quick, some are not.

[ronboogieon]

RX8 tried to race me... Winner...Cop by a car length!

Lol, I ignored him. He pulls away and an unmarked popo comes behind him and pulls him over a car length later!