156

 

Ive been about 135 too it felt like it had more but I let out because it also felt like it was going to take off

 

I hit 152, about 8500 rpm in 5th gear.

 

At the risk of sounding trite--

HOLY THREAD RESURRECTION, BATMAN!!!

 

i feel better about my 8 now

 

this thread is stupid and need to die!

 

I would be seriously disappointed with this car if it couldn't even reach 140MPH. Seems like later RX-8s have better top end performance.

I got my old 1994 Acura Integra with 170HP and 8200RPM redline up to 130MPH at least once so it'd be pretty sad if an RX-8 couldnt top that.

I do hope that anyone who attempts to find the top speed of their RX-8 does it in as safe a manner as possible mainly not hitting anyone or anything else in the process.

 

From what I've learned about the Subaru STI, it would do 155 stock, and if you installed an ECU chip, would remove the limiter allowing for a top speed of around 170.

Now I found this same type of chip for the RX-8's and would assume it would remove the limiter.

http://www.sfxperformance.com/parts/UNI1320013.htm

Anyone here have this?

 

I don't believe this, you would be at around 9700 or so, wherever fuel cut out is, you would have hit it. 146 in fifth is 9500.

 

First off, the car has no speed limiter. I have had it to 185 when the car was on the dyno.

I've done 154 mph in 6th on a long flat road.

As mentioned above, 6th is really too high for top end and 5th is too low. A gear in between the two would provide best top end power.

 

Um I thought thats because the speed was measured from the front wheels....

 

On cruise control mine will go 92 MPH.

Fastest I've had it up to is 95. I doubt I'll need to go any faster then that.

 

On my trip back from picking my RX8 up in dallas, tx I was upto 110 in 4th gear and it was around 8500 I think. This was in passing someone and I soon slowed down as I don't need a ticket thanks

 

hit 144 in 6th. Ran out of road.

 

Sounds like you shifted into 6th too early.

 

145 taking up 3 lanes of highway while the highway was doing it's little nid-bit of slight curves... I was actually in 6th, still felt like it has some go, but not much

 

I can relate with that. My daily drive up 75 to Sherman takes me through Barney Fife alley, The first week I had mine I buzzed 92 so I know it goes at least that fast. Then again I peaked 100 in the CX7 crossing over the Red River once.

I find 144 to be pretty fast. Some years ago I had my 390 HP vette up to 145 at CMS on a track day. 6500 RPM. The big blocks break valve springs much above that so I held back. Besides the front end gets so light in the vette it's downright dangerous above 120 anyway.

 

Anyone have any evidence to support this claim? I don't buy it.

 

^^ It's bullchit.

 

^second that. The 8 is only limited by drag. Besides, why on earth would they have a limit at a speed that can't be reached with a stock config anyway?

 

What facts support "later RX8s have better top end performance"? I have never heard that.

 

got mine up to 155mph in sixth gear with room to go. but i thought it was a little too fast and traffic was picking up lol.

 

Yeah I take back my earlier comment about not being able to reach the so-called limit speed of 155.

 

Well the guy a few posts back got to 156. And 156 is more than 155.

So this myth is...

 

The rx8 is drag limited @ about 155mph....