Really: here is a quote from Zelim

"I data loged the the 7 AT in the 12.42 run.

Launched at 2500 rpm.
2nd engaged at 5237, shift time 0.3 seconds
3rd engaged at 5237 , shift time 0.31 seconds
4th engaged at 5525, shift time 0.39 seconds
5th engaged at 5587, shift time 0.68 seconds"

So, MT's can shift faster than an average of .35 seconds......really???REALLY????

holy ****! Nissan only claims .5 sec, these are great times! :tup:

Yes, they can.

I'm confused on why this person was hitting 5th gear in the 1/4 mile, I barely got into 4th before the 1/4mile was over...

:iagree::icon17:

Faster car, faster through the gears.

No way....not most average drivers....guess thats why they call you "the dreamer".

Do you realize how long .3-.5 of a second is?
That is a lot of time, now you want to tell me the Z auto can shift at under 0.1 then yes you can beat a manual.

How much time does it take you or any good manual driver to shift?

Well clearly it takes probably TWO seconds for a manual driver to shift because there is no way it could compare to a 370z 7AT. :rolleyes:
I am probably around .3 as I am fairly quick but not the best, a solid driver who knows what he is doing and has more practice can be in the .2 range. Beyond that you are starting to get out of the limits of a manual transmission which is when supercars and now your 70k+ cars have moved onto.

Cool. Is that with powershifting (I think that's what it's called)?

I don't power shift.

Can't wait till I learn how to drive a manual :excited:

Well
-Find grey 5.0 Mustang
-'Acquire' keys
-Get in
-????
-Profit

Fixed :tup:

fix'd

:rofl2:

:icon18:

On my way :tup:

I didn't say they hadn't changed. They've improved greatly since 1962. So have MT's for that matter (much better synchronization, and of course now the automatic blipping on our cars). But it's still a fluid-drive transmission.

Think about it: There's a real reason that higher end manufacturers are putting in expensive, heavy systems like PDK and DSG (the true semi-automatics which are basically sequential manuals with automated clutches), instead of just using ATs with paddle shifters. ATs are fluid drive (lossy/inefficient) and slow to shift. The one nice thing about the AT system is the fluid torque multiplication, which really can help in the low RPMs.

In truly aggressive/track driving situation, the 6MT has the edge in shifting speed by a mile. Your quoted numbers are just the physical shifting time (e.g. in D-mode drag racing), you have to add on top of that the input delay on the M-mode system, which you're going to have to use for any serious driving (downshifting). A good 6MT will beat that any day. I've gotten used to the 7AT's shift delay to where I can compensate by shifting "early", but it took a while to get my brain to do that reliably. There are other things you have to re-teach your brain about too, like not dropping off the gas pedal until after you upshift instead of while upshifting (or else the 7AT gets confused and shifts extremely slow and clunky).

I wasn't aware this had been discussed elsewhere, but it's interesting. I'll have to talk to some local Osiris tuners and see if I can get them to play with the line pressure on mine. I'd love quicker shifts and engagements even without FI. Something tells me it will have no effect on the lag between shift button input and the start of the shifting process in M-mode though.

I love the 7AT, it's a great transmission for a mixed-use car, I just think you're taking it a little too far in claiming it's superior in every way to the 6MT. It clearly isn't.

The reason that I am in 5th gear is that i have 4.08 gears in the diff. The factory diff is 3.33.
First and 2nd gear are just a blur. I also have 305 35 18 M/T drag radials on the car and i run them at 23 lb's of air. the traction is perfect on a prepaired drag strip. If the track has not been prepaired then they spin in the 1st to 2nd and 2nd to 3rd shift's
z

A few things:
1. Your car is not my car and I have no shift delay in M or D mode.
2. In stock form, with non pro drivers, the 7AT has proven to be faster.
(How can that be if....as you say.....ITS HEAVIER.....SHIFTS SLOWER....
and.....IS NOT AS EFFICIENT?????)
3. You cant imply/expect every 7AT car and driving experience to be the same as your car. I dont think I have the fastest 370....BUT....if you were to ride in MY CAR.....your opinion on the 7AT would change.
4. Z1 Motorsports has done several 370 GTM TT installs (including a Nismo). Mine was the first 370 they did and they EXPECTED the 6MT to be more stout when they finally TT'd one. To their surprise IT WASNT. According to John @ Z1: All things being = (boost, mods etc..) my car was faster/stronger. NOT MY WORDS....JOHNS.
5. You seem to only be able to see things from your cars point of view.....No where on this forum have I heard anyone else talk about a shift lag on their 7AT in M or D mode. Based on this, I think you need a tranny tune or that the issue is individual to your car.
6. If you need more information about the Osiris tranny tune you should call John @ Z1 motorsports for the details on how its done. He was the one who did my tranny tune.
7. This topic (tranny tuning) has been heavily discussed on this forum for many months/a year. Originally, it was passionately discussed because 1 person on this forum (Shumby) blew his tranny up when he added an SC to his 7AT 370. Because of this perceived possible issue, we were all (FI people) trying to do what we could to potentially prevent this. So again, while its new to you, this is about my 20th discussion on this.
8. Lastly, if you feel your tranny is inferior then go buy a 6MT. I dont and I am done with this conversation.

I never understood this debate. I hate when people just sit here and talk about how they bought the automatic cause it was faster. Like .2 seconds really makes a difference in your everyday driving. If I was going for a straight drag car and that was it's only purpose then I would of went automatic but for being daily driven the 6mt is much more fun in my opinion. For somebody to sit here and say the 6mt is garbage because it's .2 seconds slower is ignorant I think.

I have NEVER SAID I bought the 7AT because its faster. I bought it THE DAY the 370 came out....so no one really knew. I dont drive my 370 every day and IT IS MOSTLY FOR DRAG RACING. Your statement "for being daily driven the 6mt is much more fun" is your opinion and I disagree......tell me that in traffic.

That's physically impossible. You have a measurable delay on the shifts themselves (time to complete), which is what you'd be measuring in D-mode, and there's an additional reaction-to-input time in M-mode.

It gets better times in the 1/4 mile in general, we've established that. It doesn't shift faster (* although I'll concede with tuning and upgrades, it might be faster than a slow-*** 6MT shifter in drag-race shift times in D), and it isn't capable of being as efficient at transmitting power in gear on average. Again, it's physics.

I have no doubt with your line pressure upgrades, your 7AT is snappier than mine, that's really not at issue here.

I'll let that stand on its own. Don't know what to make of that statement really.

Nope, mine's pretty normal. This was all hashed out a couple of years ago among the first 7AT owners. Most 7AT drivers aren't manual drivers, they really have nothing to compare to experience-wise.

I've been away for a while, but I did catch up on all the problem threads about FI + 7AT. It's one of the reasons I dropped FI off of any immediate plans of mine, I don't want to deal with the additional tranny hassle.

The 7AT is factually inferior for track driving, line pressure upgrades or not. It's still a great tradeoff for me, and I like mine, as I've stated several times already. Get a grip.

Traffic ... Ughj

And where did I say that YOU said that. I was just stating what I've read in other threads and people's general opinions they post up. You seem to only value your opinion anyways so what's it matter. Obviously everything is going to have it's pros and cons. And yeah, if you read my post I stated it was only my opinion but thanks for justifying. Again, for being DAILY DRIVEN a 6mt is more enjoyable in my opinion. Where I live and for my daily drive I don't encounter traffic at all so I have a blast. Again it is only my opinion and if I still lived in CT I would agree that the AT is more practical. No need to get offended.

if you lived in so cal with hours of traffic then you would understand....there is no way to avoid traffic.

I've never even been there and I understand lol. I feel so bad for you guys that get caught in rush hour out there. That would drive me up a wall, and yes I would be begging for an automatic if I did have to deal with that lol.

I've had both the 6MT and 7AT 370 at the sametime. They both have pros and cons, the 7 was faster at the track mostly because it was easier for me to launch. This is a personal preference thing and there really isn't any reason to fight about it. I ultimately sold the 6MT, but it was because the wife refused to learn how to drive it and she pays the bills. IMO 6 more fun on open roads, 7 easier period.

:iagree:

Enjoy what you have and don't worry about proving whether or not its better than what others have.

Says the man with the crappy auto:icon23:

fix'd

:tiphat:

F-it I'm going to pull my trans out and put in the GT-R trans done.

Do it!!!!!! :woot:

After finally running this at the track I can say it seemed like it took for ever to shift in M-Mode after I hit the paddle. I am 100% sure I could shift faster with a 6MT. Just thought I would throw that out there. Would I trade my 7AT for a 6MT? Nope!

Back on topic:

Shumby any news from Sam?

So increasing the valve pressure so it shifts faster would reduce the chance of damage?

Couldnt you just have it shift only if the engine load is below a certain level (one that the transmission would normally experience on a stock engine? Then have the pressure increase after the clutch is fully engaged for a smooth shift. Then reduce the rate at which the throttle can open to reduce the sudden jerk that can damage the transmission.

Just a thought

As much as i like my 7 AT. i have to tell you that it just sucks if you punch it and your in 7th .6th or 5th. The car is just a dog in those gears, But in the 1st 4 gear's with 4.08's in the diff. Its a bear, it unreal how quick it is.
Oh yes and the fuel milage is not good 20 % less with the 4.08 gears and a low speed's in rush hour trafic the rev matching is a major pain.

Z

So if I'm not wrong you are saying you just push the car till 4th not after that? more asking under normal driving conditions not on track or dragstrip.

And what do you mean by rev matching a pain