https://secure.buschurracing.com/cat...ce2a487888adcb
anyone use this with two tunes and a stock ecu. Is it just tune your car flip switch and tune car again thanks in advance

 

I don't quite get the second part of your question. I'm currently using that set up with my 91oct/e85 tune if that's what you were asking

 

i dont understand how it switches between two tunes the pic looks like its just wires and a switch

 

So when you switch from E85 to other fuel all you have to do is flip the switch? Is there anything else involved? Like how much fuel needs to be in tank or does the ignition have to be set at run, on or anything of that sort. And yes I know you have to have both maps ofcourse.

 

Because you don't have the instructions with ECU pinouts.
http://www.dynotech-tuning.com/

This will explain more on how it works. Two Maps, different ECU pins.

 

Here are the installation instructions and some video tutorials to give you a better idea. When you power up a particular ECU pinned input with 3-5vdc, it tells the ECU to switch to the alternate sets of maps in the ECU when you are using the appropriate 'Tephra' patched ECU rom files. The switch and LED make it very convenient and easy to switch on the fly. The harness also comes with the appropriate ECU pin already installed on the harness so all you need to do is install it in the factory harness, connect the power wires as described and you are good to go. This feature does need to be activated in the ECU rom file though before it can be used. I hope that helps

http://dynotech-tuning.com/instructions.zip

 

^^So can anyone answer my previous question?

 

Obviously it's wisest to have as little gasoline or e85 left in the tank before ou fill up with the other fuel type. Once you have both maps tuned for their appropriate fuel types, all you need to do is flip the switch and the ECU automatically switches over to the other tuned maps.

 

Well yeah the obvious will be obvious, but I needed some clarifying. Thanx.