you can't cut into the wire and put a toggle on it?



sounds to easy doesn't it

 

chad, by liability I mean that when you mess around with ABS or PSM programming you are directly tampering with safety devices... this falls under a different category than engine mods or removing a 1.3 bar boost limitation.

suppose a glitch in the modified psm program causes you to crash while PSM is "active," where the normal PSM program would have saved you. that sounds like a lawsuit waiting to happen.

why not just take out PSM completely? what the hell do you need PSM for, you hardly drive it (and I doubt you drive it like a nut), and when it is driven on the track, it's by pro drivers!

 

Shoot me an email...

joew@diveaz.com

I'd be happy to design a small circuit to do what you need done. It will not modify the ECU. It will simply activate when you turn the PSM off (via the factory switch), and it will trigger (reactivate) itself when it detects that the ECU has tried to turn PSM back on. The response time will be a few mS.

I wouldn't touch ABS modifications with a 10/20/40 ft. pole... but I'd be more than happy to provide you a permanent on/off switch for PSM.

Kind Regards,

Joe West

 

Tyson,

You don't know me very well, but that's ok. Your talking to a guy who HALO's for fun. KA is benign by comparison. Ask sharkster what an e ticket ride is like on KA, he had a little demo. I wouldn't assume just because I engage pros for demos means I don't know how to handle her. I am very unassuming and don't care much about what others believe I can and cannot do. In the long run I have learned this approach has it's advantages.

Back to the question, there are certain instances where I would prefer one or the other system depending on the circumstances.

Overriding the throttle body is tampering with the safety system, so is installing GT3 seats, changing your safety belts, changing the OD of your tires or adding a roll cage. This has never stopped people before. Besides, according to Porsche, if you exceed the speed limits (race), there is no warranty. The car wasn't designed for this type of abuse.

 

Not making any assumptions of your driving skills Chad, but let's face it, your car has seen the dyno more than it has the road

And since you just stated that you have the skills required to handle KA and its massive capabilities, you just solidified my point. Why in the hell do you need PSM? HELLO, am I missing something here?

Also, I believe that some of your logic is flawed. A properly designed roll cage actually enhances safety by nature. So does harness belts. Arguably GT3 seats are stronger than stock too, since it does not recline.

Modifying your ABS settings is a different story. That can definitely affect safety in a negative way. You know it, and I know it, so let's not try to equate that to putting a roll bar or cage in the car!

 

Chad,
I was thinking along the lines of Joe's suggestion as well. The PSM activation switch is a momentary switch. It would be pretty easy to design a small circuit that has its own on/off switch (could even be the same switch), checks the state of PSM at any given time, and instantaneously (several milliseconds) turns off PSM if it detects it has been turned on if you have previously initiated an off mode.
It is sort of a work around, but I think it achieves your PSM control goals.

 

Problem is it isn't an "all" off thing when the button is on. It is still active to some degree. Simply building a circuit that shuts the switch down would not yield the results Chad is looking for.

 

Tyson,

I believe you are taking me a little out of context. I have many of the skills to handle KA in many situations. I certainly didn't say I have all the skills. In all due respect, your statement appears to assume KA is my only street legal highly modified car and the others never are driven. In addition, there is an assumption I don't own one or more track specific cars. I said prior, that is ok with me.

Nothing unsafe with a roll bar/cage as long as you wear a helmet all the time. The main reason a bar is judged to be unsafe is no head protection. You can argue the GT3 seat's safety all you want. They are not legal and I believe we are discussing the fear of people being sued? I believe this reinforces my point. Don't get me wrong. I love all the parts you identified above and use many of them. Using safety, the way it is being used in our discussion is like discussing if a gal is just a little pregnant. The point is, are they in fear of being sued because of possible safety issues..... I don't believe so. My opinion only.

 

Thanks for clarifying Stephen. The whole purpose of this thread is to discuss the subject and hopefully see if anyone has made any progress to this end. A turbo having this ability would be awesome. Imagine the increase in the g force abilities. Yes, when the car let's loose you would be in a far more precarious situation than you would be in if you were driving a GT2 or GT3, but then again, you would be at another degree of handling the others could only dream about.

 

Joe,

I really appreciate your reply. I sent you an e-mail. Would this switch allow you to use the PSM as you choose? That's is to say, allow the PSM to operate in one mode and keep it off in another. My ideal set up would be:

1) PSM on
2) PSM off yet activates under certain conditions (stock factory)
3) PSM like you have described

Have you ever tried this switch on another Porsche with PSM? I would be willing to try this just to see what the results are.

 

I love this forum if for no other reason than to obtain a different point of view. I thank everyone who has shared their information. I will be sure to share the results.

 

It will be interesting to see if this can be pulled off without using Motec and the Motronic instead...

PS Stephen, do you know of any 996TTs already using it? I figured since you do it, you would know