http://www.mazdamark.com/prod01.htm

i was wonderin wut u guys think bout this? would it cause a n/a motor to deonate? anyone ever tried this before j.w

 

no I never heard of anyone blowing a motor because of that mod before.N/a's run pig rich I don't think you should have anything to worry about.

 

Well considering Icemark is a Mod here I'm sure he'll chime in :-) I was kinda interested in this as well. I notice my car does seem to run way rich in the heat and it needs to be leaned out something wicked.

 

no.

Edit: No.

 

k well i guess ill try it .. theres 2 settings 50degress colder ands 75 .... wut do u guys think woudl be best . also dose anyone knoe where i can take my car to get the tps adjusted. i dont know how to do it and it is not adjuested right... thanks. ill try to install the mod this weekend sumtime if ic an and ill let u know if there really is any difference.

 

do a search for tps adjustment its really easy all you need is an ohm meter and a flathead screwdriver

 

guess ill try that.

 

i dont know if this will lean you out, but it should help burn more by advancing timing? ive always been confused by this mod.. does anyone know if it also causes the ECU to step up fuel intake? or does it just adjust timing? techs this is your time to shine!

 

By tricking the ECU into thinking that the air is cooler by modifiying the signal, the ECU advances timing slighty and provides slightly more air through the BAC.

Both of which lean out the mixture, helping a non turbo make more power.

The other advantage is that Nippondeso air flow meters have a really wide default range, so that for example, at 68* F, the meter can report between 2000 and 3000 ohms of resistance...

well if it really is reading off by 1000 ohms (and that is within the factory operating window) at 69*F it could be telling the ECU that it is really 110*F... which would way rob performance and actually richen up the mixture (less air in and timing back to default- no advance).

So adding a resistor in there helps prevent that warm weather default operation as well.

And everyone knows how much better the FC and FD engines both run on cold days.

 

thanks icemark.

 

thanx. i wanted someone to put that to rest.. so no additional fuel is injected?

is just a 1k ohm resistor?

 

Actually 4.5K or 7K

 

Will this be safe to use when the weather gets cold again (northeast)?

 

edit: way up north

 

works even better cold than warm...

See it tells the ECU that the air coming into the engine is colder than it really is.

 

did this today with a 6.5k resistor, noticed a tad bit of power gain in mid range, in the upper powerband.. there is hardly any power left, after 7k power is Zero. Before It used to pull hard till about 7.5k and power slowy drop.. this is a sudden drop in power at 7k. Will try to use a 4k resistor to see if that helps.

 

I just ordered one. Hope it works.

 

used 2.2k.. noticed such a strong drop off in power in low range i pulled the damn thing off.

 

what effect will this have as far as octane req?

and which wire would you hook this to?

have many MANY resistors to try this with so would you guys mind giving me some help here as where to install it?

 

http://www.mazdamark.com/resistor_mod_installation.htm

 

2.2K would hardly change a single thing (it would change the reported air temp at best 25*F lower).

Perhaps you put it in the wrong spot or wired it incorrectly

 

it went on the green/orange wire on my s4.. it felt like i lost alot of power throughout hte band, especially my low end.. running to rich?

maybe ill try using 6.6k worth of resistor. that should throw it into radical advance right?

 

still curious though will this change the octane req with the advanced timing?

and what difference can I see for gas mileage and power?


real expectations?

 

for anyone that orded them, before today, they went out today

 

The temp sensor in the AFM is used by the ECU to compensate for changes in air density. If you tell the ECU the air is colder and therefore denser, it will add more fuel to go with the supposedly higher mass airflow. This makes the mixture richer, not leaner.

I don't believe the AFM temp sensor alters ignition timing. Ignition timing must be based on the actual temp of the air entering the engine, which is measured by the air temp sensor in the manifold.

Why would this increase airflow through the BAC? That seems unnecessary. And since the air flowing through the BAC valve is metered by the AFM, increasing this airflow would not change the mixtures, only the idle speed.
Yeah, but that's because the air is actually colder...