7AT throttle lag

CSGLEON

im sure this topic has been beatin like a dead horse.. but!
i kinda wish i test drove the 6MT along side my AT. anyone that drives an auto like me most likely can relate. the throttle lag when you mash the peddle is pretty bad in my opinion like a turbo is winding up. one of the reasons i bought the AT was because of reports that it is faster due to computer. so is the 6MT really responsive compared to the 7At for those who have driven both? i am now using trip more then ever even more so then the paddles. i thought the vvel was supposed to be super quick and responsive with valve lift at higher rpms. im no mechanic, but it seems you either have to mash it and get a delay but decent blast off lol. or use triptronic to get a more sporty feel but lack that MT control you need to throw the gears down.

DEpointfive0

... The only advantage in shifting times is lets say going from 6th to 3rd, otherwise the 7AT is faster...

And... Have you driven the 7AT? You have 100% the control of a manual. It keeps you in whatever gear you want

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fzgood

I have a thread probably lower on this page that talks about throttle response on the manual. With SRM disengaged, there is a little lag with throttle blips. Turning off VDC makes it better (don't recommend). I'm surprised this leads to a complaint with the auto though, since you don't rev match your downshifts... I test drove the auto, it's a good one and I'm confident in saying it's easier to drive fast in the 7AT.

Wonka2581

You can do some thing that might help, like a UpRev tune. and a Under dreven pulley.

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CSGLEON

Well.. I was just kinda confused! On my first test drive "7AT" coming from an exterra.. Obviously there was a major difference!. [that being said] I have friends with fast cars! 2008 vette.. 2006 vette.. Ls1 gto goat. 2012 camaro ss. I have driven all of them! But the responsiveness of my now new 370 seems laggy. Not to bitch and complain... I'm just kinda not used to the trottle body being wide open and the lag. This is just my opinion of course! But the lag sucks. So I have been playing with triptronic and it feels a bit more sporty. But I thought the vvel was going to eliminate lag..... Guess not

DEpointfive0

There's electronic lag that a tune can take out

I think (correct me if I'm wrong) that your lag issue is when lets say you're cruising at 50 and you need to mash the pedal to overtake someone, and there is lag until it kicks into a lower gear?


If that's the issue, you're kinda SOL, just build that into your driving time

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Wonka2581

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DEpointfive0

Gotta think 3-5 lane changes and cars ahead, just sayin

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DarkJak

^^^How I'm interpreting it too.

@OP: If you want good response, drive it in manual mode and downshift before-hand. There should be practically no throttle lag in gear (I can't discern any while driving hard at least).

If you're driving in auto mode, then what you're describing would be better put as transmission lag. The Z has a conventional automatic that still takes time to shift despite being pretty well tuned imo. You could try driving in M for a while, maybe get used to it. Eventually you'll find it more natural and enjoyable since driving feels more direct.

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Wonka2581

Here you go....

GTM Valve Body Upgrade Review

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Jordo!

Beaten? The bones of the horse were bleached by the sun some time ago.

Anyway, its not so much the choice of trans as it is the lack of an old fashioned throttle cable that's to blame.

The throttle response can be markedly improved, with excellent response via tuning. If you don't want to go that route, another option would be the several plug-n-play throttle response adapters (essentially, they are signal conditioners, that tell the ECU to open the throttle more given less throttle input), which I believe also correct this issue reasonably well.

Search and ye shall find

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scottIN

When I first got mine, I noticed a lot of lag as well. First thing I did was change out the air filters to K & N panels. Huge difference. Then changing to the Z1 silicone intake hoses decreased it again. It's not perfect now, but for a hundred bucks or so those two mods make a huge difference.

Tigger

I read every post to make sure I wasn't going to double post but yes, if you must, THIS.

The 7AT increases valve pressure across the board when in M. That is why it'll jerk you around quite a bit if you haven't learned to feather the gas during certain shifts. It acts much like a manual. But that is also why the shifts are a little quicker and firmer.

And don't forget, ALL 7ATs are equipped with DRM (Downshift Rev-Match) regardless of having sports package or not.

Suffice to say, after giving M a shot a few times and getting adjusted to it I drive M all the time now. No, it isn't a manual. But it certainly acts like it. And to get a smooth drive you have to feather the gas like a manual. Kinda crazy, but it;s true. And for arguments sake, yes, I've drive quite a few 6MT 370s now.

And even though people hate on it because it is still a standard auto, what everyone fails to realize is that it still performs. I could care less if it a twin-clutch or PDK or DSG. All it means to me when someone says "It isn't a twin-clutch" is that they need acronyms and F1 car technology to be happy with their VW Golf even though there is little to no difference and few people track a Golf to the limit where that 16ms actually makes any impact on their lap times. Give me a break.

Honestly, if you can take a time-honored pile of crap and make it suitable for a sports car then you deserve some praise. I think they did a splendid job.

gurneyeagle

The lag I experience is what was described above - driving at 40 - 50 mph and need to jump on the throttle to pass someone. It's not throtle lag as the revs jump up to 6k immediately. It's the downshift that's lagging.

The easy solution is just drive with the paddles.

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DEpointfive0

I don't understand this... If you're at 45, 7th gear, and need to go to 2nd... It will take you MUCH longer to shift yourself, than to leave the car in D and mash the pedal

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