rx8fanatic2085

soon as petti's supercharger comes out. Will be able to destroy manuals=)p

mysql101

ROFL.

Are you being serious, or just trolling?

Hopefully you're trolling. The MT6 just STARTS making power once you're above 5k rpm.

fizzer

Erm, I refer you to this post (but you can look at any Rx8 dyno): https://www.rx8club.com/showpost.php...73&postcount=7

Yeah peak power flattens out, between 7750 and 8250 RPM Notice the dips at 6500 and 7500, those have been mostly tuned out by the new PCM flashes.

Only thing I can think of is that you've only revved past there when running 87 octane gas. Put the right stuff in and you get extra power way up there. Bad gas doesn't really make a difference below 6k ish rpm.

Moon Assad

it takes about half a second delay to shift, you have to shift then let of the gas then get back on the gas when you feel the band engage, then you catch it just rite, if your slamming gears, you trany is going to have less life, also used synthetic, seemes to engage better.

Moon Assad

unless it has had a ******* LOL

NgoRX8

iTrader: (1)

I believe one of the rotary guru's here on the forum stated that the auto actually has more power up to its redline but the extra horses on the manual kick in above the 7500 rpm. My words my be twisting his or whatever... or I maybe wrong. But just go look at some dynos because the car is for sure making more power as the rpms go past 6k.

DjRx8

Come to think of it, F1s have AT, right?

Winning 8

shifting fast is very easy, press the clutch, shift the gear, let go of the clutch, all at the same time. auto shifting is not faster, but easier.
step on gas, push a botton. Done.
If Mazda start with a 6 speed auto, then most of the people will buy an auto. who like driving a stick in traffic.

cjkim

not sure how you can press and let go of the clutch at same time

DjRx8

It's easy! Look! See!
Oh Damn!!! Forgot to shift the stick!!!

Easy_E1

iTrader: (2)

on and on it goes ,,where it stops nobody knows?
I do like my AT and when I trade it in I will get the new 6speed AT


SO there

Rich Rx-8

Yeah man I honestly still don't feel any more power at 9k rpms than I do at like 6krpms. If it's there it's only noticeable noise wise. Thanks for all the written info but I've never been impressed with the power in the high RPM's while actually driving.

cjkim

try looking at the speedo next time

yiksing

No, they have electronic controlled clutches i.e. Sequential Manual Transmission.

fizzer

I think your butt dyno needs recalibration

strokercharged95gt

From a dig, if the MT 8 does a 7k feathered drop and dead hooks it the race will be over!

In lower HP/TQ cars manual transmissions always dominate, they give more control and consume less drivetrain energy. Only in higher HP/TQ cars (like F-body A4's as someone mentioned) do automatics become easier to launch and are more consistent.

I think if mazda could have made the A6 redline @ 9000 without exploding they would have done it!

dillsrotary

you don't feel any more 6000 than 9000 cuz you're driving it, have a friend drive and sit in shotgun, you'll feel it

Rich Rx-8

I tried it with the dealer and I still didn't feel it, the high RPM's are not impressing me, they lack torque, that's what those loud RPM's are missing. The sound is there but the feeling isn't. That's why I'm still in my AT. The MS6 test ride on the other hand felt awesome, but I still think the shifting isn't that great in it. Nothing has really fully impressed me enough to swap yet.

cjkim

eh, i give up.

yiksing

Don't bother with him, he obviously can't feel the torque starts to get going above the 6000 rpm.

cjkim

actually it doesn't and that wasn't really the point I was trying to make

fizzer

Maybe he rode in one of those cars that had a stuck VFAD valve. I know some early cars suffered from this problem and the tertiary ports got stuck and didn't open up at high RPMS meaning that about 40hp was missing from 6k-9k RPM (because its a known fact you gain that much HP in that powerband).

From what you've said, you didn't try to go steady at 6k RPM in 1st or second and then floor it, the powerband is so linear that it is hard to feel the kick in the high RPMs without doing that.

I'll repeat, 1st gear, acellerate until about 20 mph, hold it there for a second, then floor it - your head will get tossed back. Same effect if you hold it in second at about 45, wait a sec, then floor it. Due to the linear powerband, pausing before you floor it gets you that full effect.

maxxdamigz

iTrader: (1)

I'm glad to see threads like these on forums I am new to. It makes me feel at home. Maybe I'll do a search for 20$ ebay "chips" that add hundred of horsepower.

If I had gotten my car a week earlier, I'd have a stock 6spd dyno plot to show here for proof of the power above 6k. I'm sure there are plenty on here.

Also, I believe the auto's are retuned to match their redline. This may entail altered intake geometry, fuel mapping, and such. This means they could be optimized for 4k-7.5k power where the manual is optimized more for the 5k-9k power. I don't know if they did, but I would have if I were them.

Torque converter fluid dynamics are what limit most standard automatic sporty vehicles. At 9000 rpm, periphereal fluid flow is 20% faster (20% higher redline than 7500). This can lead to all sorts of issues including exponential viscous effects and power loss, heat dissipation issues, and possible sonic fluid flows.

If you're not able to run at 100% throttle and put it to the ground, then the MT and AT would be indistinguishable. You would just have a heavier foot in the AT. If you like to beat your car, the MT can put down quicker quarter miles with launching and power shifting. Depending on stall speed of the torque converter and the ignition/fuel cut used when shifting, these things are not usually possible in an auto, and with good reason.

I don't really have anything valuable to add to this thread, but I am pretty bored at work. Thinking about cars is infinitely more interesting.

DrDiaboloco

This can get confusing quite quickly... I don't know if yiksing meant to say that they have electronic clutches, but that's what it seemed like he said. The transmissions are CONTROLLED electronically by the driver and the engine computer (for rev-matching among other things), but the clutches themselves are NOT electronically actuated (this is accomplished primarily by hydraulics... a hydraulic failure on an F1 car locks the car in gear or brings it to a screeching halt).

In any case, Dj, F1 cars don't have AT's even in a roundabout way, since they will not automatically upshift or downshift like AT's will... They have to be commanded to shift by the driver, or at least they do THESE days. Calling them Sequential Manual Transmissions is pretty darned close, but I prefer "semiautomatic".

cjkim

Wrong, at least for the non-6 speed autos. The biggest complaint I've probably heard from auto owners is that 1st gear is ridiculously tall.