After more looking at and exploring my Z after a long period of absence, I believe my car has a Scramble Switch connected to the HKS F-Con Pro V. Below is all I could find on the web about it? Does anyone know if this is correct, accurate and be able to shed more light on this feature? Any useful info would be great. CheerZ Vincent
AFAIK its like a short term boost mode you can set a timer interval for. So if you need a little extra to say overtake a car. You push the button and it will give you a pretimed extra amount of boost.
If it's the computer, it will have a set of ignition and timing maps that have timing advanced etc. to give you more power. Like it says, it might blow up the engine if you leave it there but it's for short burst s of speed, not long term use.
japs call it scramble boost. extra boosto when you're in a dogfight. the MCR R34 GTR runs it. slightly different and isn't timed, as long as you have the scramble boost button on the steering wheel held down, it holds the extra boost levels.
RE the HKS one, just sounds like a switch to a more aggressive tune, the boost control is seperate to the F-CON isn't it?
Yes, the scramble switch is actually mounted on the dash within... easy reach of the driver, but wired into the f-con in one of its Option Switch Inputs. So, if the description I posted is accurate as you guys are confirming, that would mean that pushing the button/scamble switch would pump extra fuel into each cylinder due to the more aggressive fuel maps. Right? That would mean possible spark plug fouling at low boost or at high boost would stop detonation via the extra fuel...right? Corrections, confirmation or otherwise of the above requested. Thanks. CheerZ Vincent
Probably more fuel and more timing. Fouling the plugs does not help with lowering the chance of detonation. That is completely dependant on cylinder temperature and ignition timing. If it's not running properly it probably needs another tune, I'm guessing it's been years since it was last done... I believe that there is only 2 workshops in Aus that can tune the F-CON's too
Thanks Chris. A better explanation of why I asked the question... I pushed this button when I first got the car to see what it was. The car was idling, and I noticed a very slight change in the idle when pressing it. I ignored it after that to be on the safe side until I was able to investigate it further. Having figured out what the button is after drafting my own wiring map of the connections between the f-con and the stock ECU, I now wonder if the change in idle was due to dumping fuel in the cylinders? CheerZ Vincent PS: Instead of stating that would stop detonation via the extra fuel, I should have said would reduce the possibilityof leaning out.
