Chief_MC

I want to ask you guys, 'cause i'm sure you know the right answer.

I saw on ebay and read somewhere that if you diconnect the intake air temp sensor and replace it with resistor there will be some perfomance gain, 'cause the ECU will think that cold air is coming to engine and will advance spark timings.

The question is - is this true? If yes, than what resistance resistor should be? What is gains and what is backdraws of this mod?

Thanks in advance!

Chief_MC

1987RX7guy

iTrader: (3)

I wouldn't do it.

slow87turbo

advanced spark timing for cold air when you are really pulling in 120f air.......can you say detination??? granted its an n/a but i shurly wouldnt do to my turbo. just a thought.



ej

Chief_MC

Thanks! Maybe can someone who tried it can say something?

minclo

um...what more do you want? some of the most experience people frequenting this board ( by most experienced i mean have the most post ) told you not to do it...i suggest the same. If you don't believe them just try it yourself and tell us the results...i'm sure most of us would be rather interested...

Chief_MC

Sorry... Just trting to anderstand in details why not to...

1987RX7guy

iTrader: (3)

Because what the ECU see's should be CORRECT. Fooling the ECU into thinking the air temp is COLD will make changes that can lead to detonation. Detonation can be VERY DEADLY to your engine. Unlike piston engines that usually survive detonation a rotary is move sensitive to it.

It just isn't worth the 5hp they CLAIM which is probably bogus too.

Santiago

Black13B

iTrader: (1)

Didn't know we even had an intake air temp sensor (stock)!

I know GMs do.. But I don't think we do.. Wheres the BS police when you need them?

minclo

i'm not trying to put you down or anything, just saying it's probably not the best idea...i think(not sure if i'm right on this though) what you would be doing, essentially, is preparing the engine for cold air. but then when it actually gets hot air instead of cold air KABOOM. now i'm also trying to bump this post cuz maybe someone can explain what will happen if you actually DO get cold air in there.(from a cold air box, or ram air intake or something to that effect) would this resistor thing work if it advance the timing and you induct cold air at the same time?

slow87turbo

becouse that sensor is there for a reason. if you remove it or make it think its getting air that is colder and denser that it really is you are going to end up hurting your motor. it needs to know the air temp to calculate spark maps and even fuel to some degree. but hey like minclo said if you wouldnt want to listen to any of us find out for your self. but i have done that "they cant be right" went out did my own thing and had my car down for 5 months. so its ultimatlly up to you. good luck.


ej

mazdaspeed7

It affects mixture mostly. Doing that makes the car run even more rich. Our cars run rich enough without any help. This only makes metters worse. It does affect the timing, but only minimally.

slow87turbo

the sensor is below the bac on the manifold on the n/a and on the elbow on the TII. its the two prong thing.


ej

1987RX7guy

iTrader: (3)

READ MORE

minclo

anyone know what would happen if he did this and actually got cold air into the intake?

Black13B

iTrader: (1)

Thanks EJ. I ran into that thing a couple of times taking my UIM off, and I was meaning to ask what it was for.

GarageBoy

If you actually got cold air in there, you wouldn't need to fool it

1987RX7guy

iTrader: (3)

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This is why companies make cold air intakes

Check out the sig guys.

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Scott 89t2

we have 2

Black13B

iTrader: (1)

Where is number 2?

mazdaspeed7

One is inside the AFM, the other is on the intake manifold.

Kenteth

thought it was behind the dynamic chamber?

slow87turbo

oh yeah i forgot about that one in the AFM. on a n/a its in the dynamic chamber but on a TII its in the TB elbow.

ej

jcina7

Doesnt the SAFC fool the CPU? That doesn't hurt the car or cause detonation

Black13B

iTrader: (1)

SAFC manipulates AFM readings to get more control of the amount of fuel going in. Of course an SAFC has a full control panel. Doing this ghetto intake temp sensor relocation has no proven results, let-alone proven SAFE results.