No apparent loss of top end power here.

 

Check out Revo Technik. They have an easy flash controller to switch between stock and tuned:


http://www.revotechnik.com/products/...usPorsche.aspx

 

Hello All,

Sport mode or in this case what is added to the 997TT is called the "Overboost function" for the engine. This feature is not in NA cars since they do not have forced induction. This feature adds .2 bar or 2.9psi for up to 10sec and between 2-5k or in the mid range.

Comparing tunes or other dyno sheets does not work well as some have it on while others have it off etc. There would also be stock car tunes compared to clipped VTG or altered VTG etc.

I hope this information is helpful since there seems to be some confusion on it. Sport mode can also be added or retrofitted to the car via a switch.





Best Regards,
Scott Slauson

 

That last part threw me? Can you clarify want you mean?

 

Hello,
Sport mode can be added to a car that did not have it from the factory with a switch. This would be the factory switch cluster. While the switch can be added it still takes an individual or shop with the proper knowledge to activate it. The only thing you would not have is the dash with the stopwatch. Then again it is just another hard part as the switch is and could be added yet costly at that point. The stopwatch though could be installed in another location.


Best Regards,
Scott Slauson

 

Thanks for the comments but why would a tuner provide a dyno sheet that doesn't show optimal power and tq if they want to show off their product? Dyno sheets are also accompanied by what specific modifications are done. It may not be accurate to compare one tuner's dyno vs another but I think one can see that all tunes are not identical, some may lose top end power while others may not.

 

Just to confirm what have been said about Sport Mode: It's not just the ECU that is changed.
To remember what Sport Mode does, just think of all the acronyms in this car. More specifically these are the 5 functions that are influenced by Sport Mode button:

1. PSM (decreased with Sport Mode --- less intrusive)
2. PASM (increased with Sport Mode --- stiffer)
3. PTM (the 4WD system becomes more rearward bias -- more power to rear)
4. TCU -- Tiptronic (more "sporty" shift pattern)
5. ECU (increased turbo boost)

 

Scott,

Thanks for the good info.
When you wrote "sport mode can be added," you are referring to the ECU function only, right? And NOT all 5 of the parameters I listed above?

 

Softronic: Are you implying that all the 'logic' of Sport is there and just needs the triggering mechanism, (this has been my hope/supposition from the start).

OR: Are you saying that the installer would have to do the ECU modifications similar to the factory one, and install an activation mechanism for it?

For either theory, how sure is everyone? History is replete with examples of how it’s more economical to have only one line of production and just restrict access to the functionality at the human level (remove a switch, etc).
As an example, has anyone followed the path of the actual SPORT switch and see what terminals it toggles, has that same person seen the absence or presence of those terminals in a non-Sport, (and more importantly) if they toggled them, would the OnBoard display show overboost for example? The theory being that all the underlying logic for all the PSM, PASM, Pxx is there and just not being used/activated. Since its all software control it doesn't cost more to leave it in and restrict its access.
Alternately, has anyone dumped a firmware with and without Sport (or just compared the ECU model numbers of a car with and without) to see if they actually conform to different model/specifications?
I am surprised this topic is taking off like it is, but the confusion might simply be that no one knows for sure?

 

Hello All again,

I thought I would make another post to answer some other basics on Sport Mode. I do not mind sharing this info as it is one thing to Know it as to be able to implement it.

Sport mode is actually resident in all the systems listed in programming above. The ECU or also known as the DME is one of them. All of these systems communicate via CAN lines and are further controlled by a Gateway.

You could say the CAN lines are like cable TV and have many different lines of com going on all at the same time. The Gateway would be as the cable box that the cable goes to and deciphers which channel info you would like to view. The TV could be as the DME or any of the other units or even lets say channel 2 is the DME , 3 is the Tip and 4 is the PASM system etc. Now all these units view or receive different info yet they are all on the same system.

Sport Mode is now just an implementation that all these channels or units that are aloud to view or use via the CAN lines and Gateway. The control now to allow this to either happen is by software security. This security is in the form of a password and once given then aloud.

OK these are the basics and I hope I did not loose anyone, I have a habit of this and many of my articles are edited for mags.

The universal port for the modern automobile is the OBD2 port in which is used for diagnostics and Flashing.... This port has CAN high and Low along with K line access and full com to all the units we have all talked about.

I will check back should you have other questions other than what the security codes are, how they are gen by what comp and back door com etc.



Best Regards,
Scott Slauson

 

I think that the one dyno clearly shows how "Overboost " is implemented in the mid range and the other shows the highest outcome being advertised for a tune. One also is in BHP while the other is in AWHP etc. Both are good for why they were posted yet not for the same comparison. This topic was on Sport mode and how it is or is not implemented and that is what I'm trying to explain. The graph I posted is from Porsche and their BHP chart.

Now granted I own Softronic however I'm also known throughout the clubs and companies for work with them. Anyone who owns a Porsche has something that I have worked on then. Well OK I will draw the line at pre SC . I do not nor will ever be quoted as criticizing any company, person or product. I will only offer facts and honestly as the chips may fall.

Vivid Racing for the record does not make Softronic nor perform any function in the company. They sell my software. I wanted to state this since many seem to think that they make it or own the company.

Should ANYONE notice a statement, post or quote by any company using Softronic that is derogatory, spiteful, or insulting etc in ANY way posted then please inform me.

Best Regards,
Scott Slauson

 

Vivid Racing commented that "The problem though with Sport Mode on all the time, you lose top end power..." I'm questioning whether this is always true and if so, is it true for all tunes? Since you are the creator of Softronic's tune (for which Vivid Racing sells) would you care to comment on this or at least your tune?

 

I wouldn't say it is loosing HP or torque. The dyno as I said shows the sport mode switched on compared to it not and with a tune. Now given this is an AWD you could give the losses at 20% to get BHP. At 6500 rpm the sport mode would yield about 530BHP and without 593BHP. The graph you posted shows about 540 in the same area. With or without sport I do not know and only one plot on a different scale.
Sport Mode though did have higher gains in the mid range. The gains though look to be less by the graph compared to the two at top and are correct. This drop is normal yet could be less or more on the given run depending on what exhaust was or was not used, 2 or 4 wheel dyno, same flash for all runs etc?



Best Regards,
Scott Slauson

 

Additionally, sport mode changes the throttle settings to me more responsive.

 

I "think" what Softronic is saying though, is that there is some controlling software (the gateway) that takes all the feeds of all the different devices and can alter their parameters along a proprietary protocol that they understand. In fact this software is in play all the time. So this gateway says something like IF Sport mode then feed1, alter stability, feed 2 alter stiffness timing, feed 3 ... etc

Then the question is, (still) can you tell the software that you want to activate the SPORT part of the code? If its NOT something simple, can a tuner do it, and how much would that be?