Quick question - I recently picked up an 08 997tt which I discovered had previously been flashed with the EVT700 tune. The previous owner also installed the GT2 slave cylinder and a LWFW, but took some things (like the exhaust) back to stock before his lease ended. I still need to determine what, if any, of the other EVT700 parts remain (headers, intercoolers, turbos) before I decide how to proceed; meanwhile, the EVT700 tune is supposed to have 'on the fly' switching to run in stock vs. modified mode. Does anyone know how to switch back and forth?

I figure it will be better for me to run it in stock mode until I get the go-fast goodies re-installed.

 

It's passive. You don't have to do anything. The ECU will adapt on it's own.

 

It's my understanding that with the flash the car is no longer "stock". Changing the octane of your fuel should change the potential hp output (ie, 91, 93, and 100), but I don't think it'll produce 480hp.

 

Curious, what color is this car?

 

What are you thinking?

 

Black, heavily optioned with Alcantara & yellow deviated stitching black interior. I know the original owner lived in Fort Worth, did he come down to have you guys do the tune by any chance?

 

I knew most of the tunes switch maps based on octane, I was just thrown by EVOMS 'on the fly' switching comments which made me think it may be like a tune I had on one of my BMWs that let you lock it back in stock mode whenever you took it to the dealer so it would not show to be modified.

Agreed. In theory I should be greater than stock no matter what I do moving forward; however, the EVT700 package changes so much about the car that I'm not sure if the removal of the parts is so extreme that the ECU no longer has a 'map' that fits. I figure if anything I will run rich (e.g. if the car thinks it still has larger turbos blowing more air than it really is), but I want to make sure it doesn't somehow run dangerously lean in the meantime.

 

I flew out and assisted in a custom tune for a client in your area who wasn't happy with the power the car was making with the previous tune in it. The car was black, and was sold with the upgraded turbos still installed on the car. The exhaust, intercoolers, DME etc... were returned to stock, though. Can you PM me the VIN? I can search the flash history on it.

 

if you ran a stock tune with a car that had upgraded vtgs it would run too lean, right?
should probably find out which turbos you have before too long I would think.

 

as far as playing it safe til you know you have all the correct equipment on the car you need to run as high of an octane that is available in your state and dont do long full throttle runs. youll be sfe driving it 3/4 for now. If you wann find out wht you got and what you need to to get back to a true evt 700 just pm me

 

I haven't heard back yet from Austin about whether or not this is the same car he worked on. I don't think this one had the DME reverted to stock - the dealer is the one that informed me it is flashed and I expect they were able to deduce that because the rev limiter has been increased - but that is just my semi-educated guess at this point.

 

No, these cars target specific torque levels and will adjust boost and timing maps accordingly. The car *should* make close to stock power with much lower boost requets.

Additionally, the DME requests and corrects for target lambdas which *should* keep the car from leaning out.



Jason, I replied to your PM.

 

We are still determining exactly what remains on the car; however, I want to acknowledge in advance that Austin is being extremely helpful. Since I am not the original purchaser I have to say that is superior customer service!

 

thanks for the info.

 

I think you need to upgrade your exhaust soon since modified VTG turbos can be damaged by stock exhaust. Heat goes up and the poor flow does the damage.