IMO they are close enough to say yes. I think if it came down to a race the 6MT would win as long as the driver knew the car. He would not win by much. Maybe .1-.2 in the 1/4 if that.

I didn't get the 6MT to have a faster car, I got it because it's more fun to drive and I like being in complete control on mountain runs, etc.

 

def, I'd take a MT over AT anyday, its barely about power. But I think the MT is always gonna be slightly more powerful as well.

 

MT's are faster than AT's if the driver knows how to use an MT.

.

 

In my experience, the MT will begin to pull away from an AT at higher speeds due to a tad more power getting to the rear wheels. There is more loss for the AT. Also, doesn't the AT G35 weigh a little more than the MT version? It's not much, but the slight weight and the slight power advantage of the MT might come into play here if the driver shifts perfectly that is...

 

Autos have longer gears.!! Manuals have shorter gears.!! If you were to line up with an auto and go at it at the same speed....when the auto hits 3rd the 6mt will walk because the autos 3rd is longer than the 6mt.!! But this is jus my opinion..

 

The 6M/T car has the advantage over the 5 speed auto., but as has been said many times, the manual driver has to know his car, and one little mistake and the auto is all over it.

C.

 

At any given moment the manual transmission is more efficient. The geartrain is less complicated and has less rotational inertia. Furter, automatics have higher losses due to:
1) torque converter
2) ATF pump
3) clutch packs
You will get less torque on the ground with an automatic.

However, automatics do good things too:
1) Because the transmission and engine talk to each other, each knows what the other will be doing next. A well designed combo will provide optimal acceleration at WOT - this should be much better than using a manumatic. Strangely, I hear this does not seem to be the case in G35s.
2) A torque converter multiplies torque when there is a high speed differential between the input and output sides. This is a result of the way the fluid moves inside the taurus. By bouncing it off the stator and redirecting it into the output side, you effectively get ~1.75x (varies) torque.

 

Ummm no. It doesn't work that way. The ECU takes in readings from the MAF, egas pedal, and the crank/cam sensors. Being an auto or manual doesn't matter, it will have the same maps and accelorate the same. I don't know what car acts the way you make it sound.

The manual is faster but the automatic is not far behind. In the 90's you could see a large difference in the track times between auto's and manual's. Nowadays the gap is getting smaller and smaller.

 

Just look up how torque converter works and I think anyone who has taken high school physics will agree there is no way a standard torque conveter automatic can be more efficient than manual.

 

A torque converter is NOT more efficient. As a fluid coupling it can not be.

However, it does multiply torque coming off the line - and NO, high school physics will not allow you to do the math on that.

 

They need a dose of www.howstuffworks.com

 

[QUOTE=Kevlo911]Ummm no. It doesn't work that way. The ECU takes in readings from the MAF, egas pedal, and the crank/cam sensors.QUOTE]

You are right that the ECU takes MAF, TPS etc. but they have moved WAY past that.

For instance, in programing the ECU and TCM, you configure them so that the engine de-tunes itself slightly at shift under WOT. This allows you to not kill your transmission. Further, it is simple for the TCM to know exactly how far past peak torque to go to get the best acceleration.

Most people do not realize how torque managed their cars are these days. In specific gears and under very specific conditions, the engine de-tunes itself to prevent damage to the tranny. Unfortunately you can not correct this with a piggy back chip. Of the X0,000 lines of code, these usually modify about 4.

 

Nissan ECU's run open loop at WOT, they are preset maps, I am sure Nissan did not detune the auto ecu because it isn't strong enough to handle the power.

 

Not too sure why the auto version would be "detuned" when Infiniti took the auto from the Q45 V8 333hp car.

 

On the G35, the manual will probably be faster than the auto due to gearing. On other cars however, the auto is faster. The Porsche TT's auto version is faster than their manual version (it even traps higher). In the Mercedes, the auto has 7 gears so its never out of its peak powerband.

In a couple years, I'd put my money on Nissan building an auto thats faster than their manuals. The GTR is supposedly rumored to have a dual clutch automatic so the days of the standard manual may be coming to an end.