Wanted to get some input and see if anyone else had this happen. Car has Tune and exhaust only car has been driving great, stepped on it on the freeway and car seemed like it took a sec to engage almost like a clutch slipping, will take it to the shop tomorrow. While I'm there I will ask about IPD if it's worth the change to install. My shop Trophy Performance has a master Porsche mechanic as the owner so I'm sure he'll know. Thanks in advance

 

Not positive..but sounds like may have just been in the right spot between gears. Also, depending on mileage, may consider having the fluids and filter changed?

On the IPD...Opinion. Not worth $900+. Also, others will chime in with opinions. This is just one. If anything it is minimal. And what you will here is a lot of people that "seem to feel" it be more responsive etc.. Now after I spend ~ $1000 on an item and a pain to install...I would likely make myself.."feel" like there was an improvement ...The old butt dyno will be super sensitive to the money just spent...

Good luck with your Tip issue (if there is one)...And if you find there is an issue, please post an update...

DC

 

Thanks for chiming in , will let you know and yes planning on oil change tomorrow it has 43000 miles on it hope to find out what happened and I've been reading posts this morning regarding the IPD and found a thread showing real dyno before and after on lombarder's car seemed legit will ask shop in the morning

 

Even when you don't feel slippage, the factory TCU is programmed to allow many small and unnoticeable slips. This is one of the benefits of a TCU flash on this car, as it dramatically cuts down on these transmission slips so you put more power to the ground.

 

At the expense of what though....

They put the slipping programming in there for a reason.

 

Ok so went to have it checked out and turns out it happened because of the tune, apparently when car is tunes and sometimes even stock the tranny computer doesn't always catch up to the reading of the ecu so long story short it happens to all tunes and even stock ecu's feel better knowing it's not something major!

 

It is to allow for smoother (albeit slower) gear engagements. Most customers who purchase an automatic wish for gear changes to be as smooth as possible, and naturally Porsche doesn't want to hear customers with stock cars complain about such.

To increase the clamping force of the clutches and minimize slipping will actually enhance the lifetime of the clutch packs.

 

Glad to hear you got an answer

 

Sounds like all the more reason to get a TCU flash

 

Thanks for posting the update!

DC

 

Unfortunately found out even that's not 100%

 

According to what you are explaining, a proper TCU tune matched up to your current ECU tune will fix your problem. Try for your TCU and ECU tune to be from the same tuner. I.e. both of mine are from Proto. The TCU tune became absolutely necessary after I upgraded to 65mm, would not shift correctly without. GL

 

Thanks appreciate that not a bad idea gotta find not only a good combo but also $$$ since I would be nullifying my current tune which I got for a steal

 

The main thing you want to be concerned with, in terms of matching the TCU tune, is your shift points. With an automatic car, you have the engine rev limiter as well as the TCU shift point. If the TCU shift point is raised too high, and your tuner isn't the one who programmed your engine rev limiter, you run into a situation where the car gets stuck in gear. For this reason, when a customers wishes to pair a GIAC TCU tune with another company's ECU tune, we maintain the factory TCU shift points. We have tuned many TCU's with other's engine software, and all have had very good results.

On the very high horsepower cars, it even helps to have the engine rev limter a few hundred RPM higher than the TCU shift point, as first gear redline can come so quickly that the TCU can't catch up, throwing the transmission into a limp mode when it bangs the rev limiter. This is something that will frequently occur on upgraded turbo cars with factory TCU programming.

 

I run a Softronic tune on my 997.1 tt . Thomas @ Emmanuel installed the GIAC TCU tune based on the setup he described above. I've had the car out for a few spirited runs testing up shifts under power, downshifts, hard pulls through 2nd,3rd and into 4th (not enough open road for 5th) in manual mode, sport setting. Also tested in auto mode sport setting. No issues. The transmission shifts much quicker in both manual and auto applications.
No slippage was felt during the test pulls. I actually felt (seat of pants) that the cars is putting more torque/power to the ground.
I haven't noticed any issues with the TCU keeping up with the ECU. My feedback is based on a few test runs so time will tell. I'm very happy with the performance at this time.