Question: DO YOU EVEN READ THE FORUM BEFORE POSTING?

I run my TT'd 7AT all the time AND PUSH IT IN THE HIGH GEARS WITH NO PROBLEMS......why and how: this from above:

Depends on yout tranny tune. Z1 iincreased my line pressues on all gear shifts with more focus on the taller gears (4,5,6,7) to decrease clutch time between shifts. All this is in normal D mode.

To date, ONLY A SC has blown a 7AT and we dont know exactly why. Its not the TRQ that kills the 7AT, its the small clutches that the tall gears have (4,5,6,7).

I NEVER DRIVE MY 7AT IN MANUAL MODE.....ONLY D. MY tranny is tuned to shift IN D just as good as in M. Higher line pressures reduce shift/clutch time and decrease the chance of damage.

No I never read as I'm blind. Damn take a pill and and relax a bit. If you don't want to answer then don't. I wasn't asking you directly, I've talked to Sam at GTM and didn't really get a direct answer. He did say it was the TRQ that did in the clutches of the upper gears. So I don't know how big the stick up your butt is. I can how ever recommend a good proctologist. When you do have it removed we would all love to see :pics:

:icon18:

:ohsnap1:

OK, to re-state: I guess you could say it is TRQ.....but not really. The real problem is that the tall gear clutches are to small (as I said above). The only solution for now is to increase the speed of the shifts so that you keep the tranny out of the small clutches as much as possible. If you are FI and your tranny IS NOT TUNED by uprev osiris, then the solution would be to stay in manual mode when pushing the car hard and be careful in the tall gears.

A valve body upgrade and tune by GTM would also solve this issue temporarily. Hopefully someone comes out with a way to rebuild the trannys so that the clutches are stronger.

P.S. No stick in my butt. Thanks for the offer to help.

No problem. Anytime. :tiphat:

Blue370 you said your line pressure is at the same levels in D as M. So can you increase the pressure even more than what it is in M mode? Or is this the max?

Mr.and Mrs., I am not sure if anyone knows what max is? If you want specifics on where my actual line pressures are at, you will need to talk with John at Z1 motorsports as he is the one who did my tune.

I know the topline information but am not a mechanic......thats why I go to Z1.

Since you slipped this into the end of a locked thread elsewhere, I'll pick it up here where it flows right into the conversation.

AT's aren't as efficient as MTs, you do have to just get over that basic fact. Solid gear engagement vs fluid drive, simple as that. Our AT's do have a lock-up mechanism, but it's not employed full time, it's conditional. The 7AT is known to be faster in the 1/4, that's true on most good cars really.

Shifting time has two factors to it: the reaction to the shift input, and the actual shift time. The actual shift time on the stock 7AT is reasonably good, but any half decent manual driver will beat it. Add in the reaction delay to the up/down-shift commands, and it's notably slower. Of course, you wouldn't realize any of this because, and I quote:

Those paddles are there for a reason, if you're not using them you're really not driving the car. D-mode doesn't ever downshift properly for corners (it can't, it's not psychic, regardless of your special tuning). If all you do is drag-race the car, frankly there are faster and cheaper options for drag-racing than a 370Z :P. Your opinion on the relative shifting speed and predictability are meaningless if you only ever drive in D.

I don't regret my choice on the 7AT, but you have to face up to the fact that it is an AT, and it does come with an AT's shortcomings.

Back to your special tuning, I wasn't even aware Osiris Tuner was capable of changing the line pressure, do you have more details on this? They're certainly not advertising the feature publicly. Did your tuner say anything about possibly reduced tranny life with the upgraded line pressure without valve body upgrades?

The fastest N/A 1/4 mile time I've seen was jnaut in his 6MT.

Yes, that is correct. I think he may have the fastest N/A and FI 370 so far. Not counting some super stripped down just for racing, never drives on the street one.

ps: what the hell are you doing still up?:icon14:

I think I've seen one or two FI times that were faster than his. Z eliminator is at 12.42 with his 7 AT.

I'm enjoying my first day off from classes and I have nothing to do tomorrow :tup:

Ok cool, yeah jnaut has something like 12.2

I data loged the the 7 AT in the 12.42 run.
I have the time that i actually shifted at and when it engaged the gear
Launched at 2500 rpm.
1st to 2nd 6400, 1.13 sec
2nd engaged at 5237, shift time 0.3 seconds
2nd to 3rd @ 7475 , 1.5 sec.
3rd engaged at 5237 , shift time 0.31 seconds
3rd to 4th @ 7712 , 2.9 sec.
4th engaged at 5525, shift time 0.39 seconds
4th to 5th @ 7700, 5.15 seconds
5th engaged at 5587, shift time 0.68 seconds
5th to 1320 ft. @ 5812, 1.74 second.

This is with the stock preasure settting on the 7 AT with 4.08 gears.
the only bad lag is 4th to 5th. " so you still think that you can out shift me with a 6 MT "
All reading taken with the cobb. ( elasped time vs rpm )
i am going to have my transmsion fluid checked next week as to make sure that it is full.
as it is very hard to fill it after i had the torque converter changed, this will be the 4th time that we are checking it and each time we are adding more fluid to it. It makes a big diference for the 4th to 5th shift time.
Talked to Sam about this and he is sending me an uprev tunner cable so that i can increase the clutch preasures.
i also short shifted 1st gear, did not take it to 7800 rpm.
there are faster times in this car.
I have not not trouble racing guys with stick shifts. The only thing that beat me out of the hole was a dodge hemi 4 wheel drive jeep. ( unbelivably fast) but i ran him down at the finish.
I gave many corvettes a good run as they were all behind me at the 1/8th mile.
My 60 ft times where 1.855
330 ft @ 5.22
1/8th @ 8.020
Mph 1/8 @ 88.83
1000 ft @ 10.410
1/4 @ 12.42
trap 114.39

It should be noted that the factory tack is out by 250 to 300 rpm (8300 on the tack = 8100 cobb. redline is set for 8100 and it will hit 8300 and redline. Not sure waht the error is at 7500 rpm.

I shift in the MM mode, its way quicker than being in " D "

Just think what a VB upgrade will do for the 7 AT
If we can reduce the lag by 50% in the 4th to 5thth gear change this car would go easy 12.0, to 12.2's.
I must tell you guys that the track prep was perfect as it was glued for 1000 ft. there were no traction issues at all.
My GTM stage 2 SC is all most done, a few more weeks as he is dynoing it very soon on somebodys car at his shop.
can not wait to see what 460 or more rwhp will run at the track.


Z

I am not getting into an opinion debate here: "but you have to face up to the fact that it is an AT, and it does come with an AT's shortcomings".....yes you're right....its still 1962 and AT's have'nt changed at all.

As far as your awareness of Osiris tuning on the 7AT: Its a well known fact among any 7AT's considering FI (SC or TT) on this forum and is in many of the posts and threads about FI. The tuner does'nt really know about reduced tranny life due to increased line pressures, but its irrelevant because if you dont increase your line pressures with FI you might damage the tranny NOW because of increased HP/TRQ.

There are many mysteries with this car. Will it reduce tranny life, its a new tranny....no one knows....they can guess but dont really know. Unrelated to the thread but related to this post: VVEL hasnt even been figured out by FI and tuners yet......its very complicated......so is the ECU......NONE of the tranny, VVEL, or ECU technology is the same as the 350Z or any previous car. Its still being figured out from an aftermarket point of view.