WTF is a "Advanced Timing Resistor"??? Check this out....shed some light.

[AirWolf87]

hey guys I was looking around on car domain at some 96 GTs like mine and i read this kids Mods list and saw something that i was completely unfamiliar with. One of his mods was an "advanced timing resistor"
I left him a msg asking him about this and this was the reply i got.

"Ok, the resistor is just a regular circuit resistor that you plug into your air temperature sensor in place of the actual sensor. What it does is basically trick your car into thinking it has a cold air intake and it's sucking in the coldest air possible all the time, which means more air and more fuel, which means more power. It added a small difference i thought but i mean for 5 bucks what more could u want? If your interested in one theyre on ebay just type in mustang gt speed chip or somthing like that. I dont know where they get timing advance out of it tho, its wierd but just wanted to hit ya back bout that, keep me posted"

this to me makes no sense. Even if his explination of the air intake is true (which it sounds strange.....I thought if the car is getting dence air it slows down the intake because it doesnt need as much air) still what the hell does this have to do with advancing the timing??? but he sais he has noticed gains. has anyone heard anything about this or have any ideas.. this sounds like another useless ebay mod. but im still curious.

 

[n0v8or]

The powertrain computer adjusts the timing and mixture to accommodate intake air temperature. Cold air is more dense, so more fuel is required to maintain the same air/fuel ratio. It's the mass of the air, not the volume, that is used in the formula. The resistor "tricks" the computer into metering the fuel for colder intake air than actual. In other words, a richer mixture.

 

[Green4.6GT]

i might be wrong, but depending on what circuts it is messing with, couldnt it cause your car to thinking its not at proper operating temp.. causing the car to bump the timing to warm things up(opposite of when its rediculously hot out and the car pulls timing).. i could be grasping at straws here tho

 

[AirWolf87]

In other words, a richer mixture.

Right, but i thought that making the mixture richer would lose power. I thought leaning out the mixture made more power...hence y some ppl pull the MAF screen?

 

[mrvax]

I've heard this mod will work...temporarily. Your EEC will get used to the change in voltage (from the MAF sensor) signal and soon compensate for it.

 

[Green4.6GT]

I've heard this mod will work...temporarily. Your EEC will get used to the change in voltage (from the MAF sensor) signal and soon compensate for it.

yea thats correct, its kinda a "track only mod".. it will help out for a short time, but then the ecu fixes itself

-ryan

 

[n0v8or]

"Right, but i thought that making the mixture richer would lose power. I thought leaning out the mixture made more power...hence y some ppl pull the MAF screen?"

A good point. I've never seen any data to prove there is an actual power difference. My theory is that folks who have the faith to buy and install this device want to believe there will be a gain. When the engine feels noticeably different, they conclude it's a gain in HP.
It is also possible that the computer will permit more timing advance with cooler intake air, which may feel like a power increase.

I agree with mrvax. The O2 sensors will detect the rich mixture and compensate by leaning the mixture relative to the computed base value. The feedback system has limited adjustment range (something like +/-3%), so it make take awhile (10-20 driving cycles?) to fully compensate the base mixture.

 

[JonJon]

Supposedly it's an old FBOD trick, not so great for our Mustangs

 

[Red35th]

That's prob the dumbest idea I have heard of in a while.

Almost all bolt-on mustangs run rich as it is? Why would you want the EEC to put more fuel in the cylinder?

 

[mrpositraction]

I hope that everyone know our cars have variable timing when at full operating temperature (>120deg. it the goes to open loop). By tricking your IAT (Intake Air Temperature) sensor, our car will advance the timing because of the cooler air available. This can be dangerous w/ a supercharger or turbo, but I am not sure if it would be bad for a n/a car. Our car retards the timing when intake termperature get too high to prevent detonation, which is really bad, if you can hear you are in trouble. Most detonation you can't hear, also it helps prevent pinging(spark knock). This can be heard most of the time, I think our cars have knock sensors so once they hear the knock (way before you hear it) it pulls some timing. It can only pull so much though (I think like 8 deg.) I don't think the risk is worth the minimal gain. My .02