just a ball park figure how much of a mpg loss. friend is going to do a stage 1 if its about 5mpg then he might get tts now so when he has cams done he is set but if its less he is going with the xieds then sell on ebay when cams are done

 

Fooling the computer by butchering a signal with Radio Shack resistors... versus reprogramming the engine management computer. Hmmmmm. Maybe there's a reason why the gas mileage goes to $hit?

 

Gonna give it a try when I get back. Probably install at the same time I get an aftermarket AC.

 

HAHAHA!! Finally someone cut open the snake oil. Hes got ***** charging $120.00 for that. They pray on the poor internetz sheeple. Ill start making them for 10.00 dollars

 

Almost all engine sensors work by altering a signal to the computer. This alters the signal too, so why would you single this out as "butchering the signal"?

 

I can't comment on whether the price he charges is fair, because I've never made one. But I often find that by the time I source components for a project, buy them and get them here, do a little experimenting, and spend the time to assemble them into a working product (and my time is never "free"), it would have been much cheaper just to buy the darned thing in the first place. And that's if everything has gone smoothly, without any major glitches.

 

The engine sensors send the signal to the computer without altering them. The computer then adjusts the engine processes accordingly. The XIED is the only one that alters them. Tuners adjust what the engine processes will be but still don't alter what the sensors are sending to the computer

 

Because it makes a fixed resistive change, adding a permanent bias to a signal that is designed to operated over a broader range.

 

Not really. Engine sensors are generally either fed a signal from the computer, which they alter before returning it to the computer, or are fed a signal from somewhere else in the electrical system (such as a ~13 volt signal), which they alter before feeding it to the computer.

If the signals coming from the sensors didn't change, the computer wouldn't have the information it needs to take corrective action. It wouldn't even have any idea when to fire the plugs, because it wouldn't know how fast the engine is turning, or when the piston is nearing the top of the compression stroke.
(There are rare exceptions, such as functions which are based on things like how much time has elapsed since startup).

 

Ditto 2 seasons now with no complaints