125 mph in 6th today, had to shut down as the freeway was ending and coming up on
45 mph traffic. Mazdaspeed suspension does make a difference!

 

Drove though some very isolated sections of the Mojave desert this week. Happy to report that the cruise control works just fine at 110+. Miles fly by, but gas consumpsion is a bit high. (I get 21 usually, but only 17.6 at those speeds.)

My wife didn't even cringe when she looked over at the speedometer, said that if felt like 85. My advice, pay attention, it's easy to forget how long it's going to take to slow down.

 

The brakes of our "Revolution" version is _very_ good. I don't know if its the same break as in your cars. At the front we have 323mm and 302mm at the back. I drowe many sportcars and think that the big brakes in the RX8 can keep up with brakes in small porsches (boxter, low power 911). The "small brakes" for the RX8 have in EU 303mm at the front and 302mm at the rear. They are okay, but the big brakes are _much_ better.


THUNEON

 

Had Mom's RX8 up to 132 mph and it was confirmed by a 300zx. IT was pretty smooth and it felt like it had a lot left. Aren't these cars governed at 155?

 

Why do they all become mileage threads?

 

The car is only limited by wind resistance. Some people have reported speeds of 180 mph on the dyno.

 

Back on topic:

126 today before I would have ran out of road. Looking for another out of the way stretch to have another go at it.

The engine sounded muted, I could hear the air against the windows...and that was it...soooo quiet.

 

133mph on a deserted stretch I had scouted well outside of Montreal on Sunday morning. Redlined 4th at 123mph and got a little over 7000rpm in 5th before I decided enough was enough (for me anyway). Fastest I'd ever got up to before was 110mph - car is smooooooth.

 

so what is the record so far of top speed on the road? fastest ive been is 140 in my vic lol that was very crazy the car sounded like it was going to explode lol

 

I just noticed this thread, being I only jump on here a couple times a week and miss a lot. Funny you mentioned 145mph, because I took my STI to 145mph rather easily in 6th gear. Fastest I've been willing to go in RX8 is 130. As I'm getting older, I'm realizing this is just stupid crap, but for whatever reason I lose my logic and I feel the need to do it every once in a while.
At the time I did want to push the car to 140+, but it just begins to take so long to reach that speed, I admit I got nervous and shut her down. Still though, at 130 it was smooth as can be. In my youth, I didn't care, and took every car to the absolute max. The STI reaches 130 so quickly, that it makes me less nervous. At about 135, the STI does start to fall off considerably because of that damn small turbo they put on her, and I said enough is enough, but no doubt that thing would still reach it's rev limiter without a problem in 6th gear. Abuse wise, I admit at 145 it downright sounds like I am abusing the hell out of the STI, which I probably am. At 130 in RX8, the engine was so smooth, and engine just doesn't have that YOU'RE KILLING ME roar. I think I'm done now, and happy with my 130 on RX8, and 145 in STI. I was impressed though that at 145 the STI stayed solid for an econo sedan body with bad aerodynamics. Maybe that ugly *** wing actually does something afterall?

 

Yes the "uglyass wing does something" :p Though I bet the STi has better aerodynamics than you think. I haven't topped out my WRX, took it to 130 once and quickly shut it down, having your license suspended from speeding tickets will do that to a person I had my modded DSM to I think around 160, but haven't tried anything that stupid in any car I've owned since.

 

Were you in 5th or 6th at 130?

 

5th gear. I realize that I am comparing a 300hp STI to a 238hp RX8, so the time it takes to reach 145 in fifth in RX8 just seems so long to me because I own a car that simply is dominate to RX8 in that category. Comparing 5th gear in rx8 from lets say 120 and above, to the STI in 6th from 120 to above, it's still not even close in acceleration. 6th gear in STI is called Overdrive, but trust me, it's a crock of ****. You really don't even need 5th gear for very long. Not fair to compare, because we are talking night and day in straightline performance. Lets just say that if I was in RX8 on way home from work, and an STI pulled up in front of me to race, from a highway roll, I'd smile and decline, as I would be absolute toast. Also, a G35 coupe and 350z would do same thing to RX8, since they would be right there with me in my STI. Not that I ever tried it or anything, just a hypothesis.

 

I was on a "track" the othernight with a new 350z and we both got up to 135 or so. My car felt like it could go faster but, my nerves would not allow. The other driver was very courteous. I was in front and he kept a city block distance between us. When I pulled into the pits I threw up a peace sign and he was on his way.

 

Haha! :D

 

About two months ago I remember one night I was cruising 80 - 85ish on an empty highway in the wee hours when I noticed a black 350z ahead of me in the left lane (he was doing about 90 - 95). I still had my automatic RX-8 at the time. I decided to catch up to him for the hell of it and the instant he noticed me to his right, he punched it. I didn't even get to see the front of his car. Flew right past me and then I tried accelerating but it was useless. I think he was at 125 in no time, and by the time I got to 108 - 110 or so I could barely see his car. Goddamn torque.

I wonder if my current manual RX-8 would fair any better.

 

Yes, it would fair better. Especially considering the AT is limited to 125mph.

The 350z is supposed to be limited to 155mph, but you'd have to have incredible road and wind conditions for the MT 8 to ever get that fast...and it would take a long time...the acceleration just aint there once you get up to about 135mph.

 

Last year some time, I had the 8 up to 145 mph. This was in 6th gear. After reaching 135, it took a long time to get up to 145. Still very smooth though.

 

130 a couple times

 

I've seen 147 on my clock, 5th gear, A9 heading down into Inverness and with the cruise on.

 

I hit 122 mph a few times on the track at Road America. I was in 4th gear, never made it to 5th.

 

Yeah i was going to say, once you get up to 150 in 5th gear and shift to 6th it doesn't take that long to find the spot where you top out....

 

155mph on the dyno last friday

 

Did you post your dyno results? Are you stock?

 

stock no i have the rb intake i talked about results in the axial flow thread. i overheated:o