WTF? is this for real?

[XtreeX]

yea didn't buy it. seemed to good ot be true.

[flight doc89]

Originally Posted by Strannik

it will lean out your a/f ratios which will give you more power and less fuel consumption, but in the end you might melt your pistons if it leans it out by too much.
better stay away from it
there are heaps of other mods which can be done under 20$

It doesn't lean it out; colder air means denser air means ecu dumps in more fuel to maintain stoich. Colder air readings without colder air means ecu dumps in more fuel than stock fuel map allows = rich mixture

[XtreeX]

soo, is that good or bad

[Strannik]

Originally Posted by flight doc89

It doesn't lean it out; colder air means denser air means ecu dumps in more fuel to maintain stoich. Colder air readings without colder air means ecu dumps in more fuel than stock fuel map allows = rich mixture

which means waste of fuel and stuffed cat and absolutely no power gains
you can just disconnect the temperature sensor used for warm up and run permanently rich

i think those boxes make ecu think it actually gets less air then it does - thats the only way i can see the car would be making more power
mk3's run rich from factory already, no point making it even more rich

regarding under 20$ mods, there is a whole thread of them listed on supraforums.com, just look over there see if anything suits you

[Reeves]

Sorry to ressurect an old thread but i really want to know some things about chips. I was told that when upgrading your car with exhaust, intake, and whatnot, the computer will get used to it, "learn", and adjust itself and you will lose much of the horsepower from the mods. They told me a chip will take care of that.. You guys make chips sounds really bad, while a co-worker of mine says they make your car run more effecient and gives you more horsepower at the same time.

Basically just want to know if there are any "safe" chips for our cars. And if not is it true that the computer will adjust to our mods making us lose horses?

[cars4me89]

What I want to know is that.. if you make the car run richer by using that chip and making it think its getting more air than it is.. and it dumps in more fuel cause of it thinking its getting colder air. So then it puts that extra fuel in and some of it won't burn up. that means the car is now running rich. why wouldnt the oxygen sensor pick up on that and change the injectors to make it run at that ideal 14.7:1 ratio. If I'm correct that would make the chip completely obselete and would in fact do NOTHING. am i right??

[suprra_girl]

the only modification that your ecu does really is ignition timing (usually retarding due to faulty knock sensors or pinging is actually happening) or air fuel ratio

how it does this is through the 02 sensor, if too much oxygen is detected in the exhaust gasses it will richen the fuel mixture to compensate (if it can... it depends on what is wrong) or if it detects not enough oxygen it will back off the fueling to compensate

the ecu doesn't really know what mods you have or are doing to it, all i can see is extra air in which case it will richen where needed

you do not lose power by doing mods, else why would people mod their cars?

and CHIPS ARE RUBBISH!

/chips thread

[suprra_girl]

Originally Posted by cars4me89

What I want to know is that.. if you make the car run richer by using that chip and making it think its getting more air than it is.. and it dumps in more fuel cause of it thinking its getting colder air. So then it puts that extra fuel in and some of it won't burn up. that means the car is now running rich. why wouldnt the oxygen sensor pick up on that and change the injectors to make it run at that ideal 14.7:1 ratio. If I'm correct that would make the chip completely obselete and would in fact do NOTHING. am i right??

if that chip makes the car run richer it does not automatically make the ecu think that there is more air, you're forgetting an important item which is at the beginning of your engine.... an "Air Flow Meter". That will tell the ecu exactly what air is entering the system, unless you have a boost leak which is of course not the afm's fault.

yes you are correct the 02 sensor would send it's readings to the ecu to which it analyses and corrects

[Isphius]

Haha yeah the AFM takes authority over all the other sensors. The other ones just kinda add to what the ECU does after reading the AFM signal. And reeves, your friend is probably referring to real "chips" Like the ones giac makes for the vw/audi turbo cars for example. Not ebay chips. And yes those do work, But i dont think anyone makes one for our cars. And most of what those chips do is turn up the boost and fuel curve to compensate because the boost is ECU controlled on most newer cars (DSMs, audis, vws, turbo diesel trucks, etc), But you can still use a boost controller to modify the air pressure to the wastegate. Our turbo supras run purley on mechanical boost control, And the ecu will just cut fuel if too much air goes through. The only chip equivalent we can get for our cars are things like the maft pro, safc-2, and things like that. Suprra girl just mentioned them.

[Isphius]

Oh and if anything that ebay chip would make the car run lean, not rich. lean = power (to a point). Almost all engines run slightly richer than perfect (the 14.7:1 stoichiometric) because the gas works like a lubricant and cools off the valves and stuff. And our n/a supras could use a little leaning out for power, But in a controlled fashion.