I am still trying to understand how the ECU works with the MAF voltage. Bottom line, I am trying to determine if the Apexi Neo would work.

If the Neo intercepts the signal from the MAF and puts a new signal to the ECU to adjust the amount of fuel provided, then if the MAF signal was already reading at 4.9v and already maxed out, then the Neo really would not be able to do anything correct?

Also, trying to understand the 07/08 ECU pinout
MAF is listed as E7-28 (VG) E7-30 (E2G)

There are 2 terminals that are listed under the MAF on the ECU pinout.
What is the breakdown of those 2 terminals?

Any other info appreciated. Thanks

 

The second is the ground for the sensor. Its referencing both terminals so you know which ground to reference when testing the signal with a dmm or scope.

 

thendawg with the win

 

Which one is the ground lol

 

E7-30 (E2G)

 

Thanks man - Sooo any idea about the neo???

 

Other than it's a waste of money and looks sort of cool?

 

Not any help - Never have been, never will be. I dont want the Dezod Inline ECU - If you dont have an answer, suggestion, or any help to provide, please do not make a comment - I would expect this comment from a user or member NOT a VENDOR!

 

Sorry man but I wouldnt recommend it either. Manipulating MAF voltages is simply not a good way to tune our car. Also for anything over 5-6 psi you NEED control of ign timing. I would highly recommend a FIC for a budget build - theyre cheap and do the job. Also you do realize the NEO is actually MORE expensive than the FIC, with none of the functionality?

 

Exactly. It lacks tons of control and will not offer great tuning by any means for any forced induction application. I am sorry if it came across brash, but I am speaking truth from experience. If you do not want to hear what I have to say from experience, I will not input in your thread John. Simple as that.

You can not add air without altering fuel AND spark. Simple as that.

 

I am sorry John, but I was not speaking nor referring to it at all for you. I know your budget constraints and I would not feel comfortable providing it to you. Thank you sir.

 

As helpfulas the Dezod guys are I'd back off a bit there, he is right.

 

I understand that NOONE would recommend it but I jsut wanted to know specific info - The neo wouldnt even work if the MAF was maxed out right??? That is the ONLY answer that I was looking for since it modifies the signal.

 

I wasnt saying he was wrong I was just looking for different information.

 

Sorry Paul just ____ed I cant get this answer. I think I know the answer, but I know other people know more than me

 

My understanding is that as the MAF voltage increases injector duty cycle increases but timing also increases at the same time.

 

Exactly - So say Im at 9psi and my MAF is maxed sending the ECU 4.9v - The ECU cannot increase the injector pulse any more, thus no more fuel can be provided from what I understand. The FIC, Ultimate, and other piggybacks can act as an MAF clamp and add fuel past that. This MUST be accomplish by directly changing the injector pulse INSTEAD of changing the MAF signal which is where the Neo has reached its limits.

Pretty much once the MAF has reached its MAX CFM or MAX voltage, the Neo simply is usless because it has no other way to provide fuel besides changing the MAF signal.

Just trying to verify that this hypothesis is correct????

 

Well the ECU uses data from more than the MAF to determine duty cycle.

From my experience the MAF clamp function does not work well - the car just doesnt run good. If I use MAF adjustment the car runs a lot smoother. I wish it were as simple as clamping the MAF and just tuning injector and timing.

I dont know what the neo can or cant do because I have never used one

 

Thanks for the input - I hate when I dont understand something or cant figure it out

 

You could run a larger maf pipe in order to lower maf voltage, Run bigger injectors and use the neo to show less voltage in order to lower fuel, but up top you would be able to run more fuel controlling the fuel. More maf voltage the more timing the ecu pulls, You would need to log the car to verify knock. But is what most people do with maf based tuning. Sorry im on cell phone.