So this filter does not create dangerous lean conditions like an after market intake would do?

 

Thanks!!!

 

Razorlab,

Would it be feasible to use the plate from the Ebay filter with the Apexi to eliminate the need for the adapter and allowing it to connect directly to the MAF? Then again, I get the sense if you could have done it you probably would have.

 

whats the point in that? Or do you mean just use the heat shield from the apexi ?

 

According to my testing this filter makes you run richer across the power band. You will have to re-tune your car to run back to the way it was before you installed the filter. Razrolab and I got the same results, both car ran richer when the filter was installed and the car was logged untuned.

 

The ebay filter has NO adapter. It attaches directly to the MAF. You will need four metric bolts to attach the filter to the MAF. Check the pictures that razrolab posted in this thread. It will make thinfs clearer.

 

Probably didn't come across as clear as I'd hoped.

What I meant was to use the plate at the base of the Ebay that bolts directly to the MAF with the Apexi cone unit if possible. Basically making the Apexi a direct MAF bolt-on like the Ebay and Buschur.

Why?

Apexi's proven filtration + the (seemingly) more true velocity stack design + the elimination of the potentially restrictive MAF adapter it comes with = the best of both worlds.

I'm probably over-thinking this.

 

Did you do any DLL dyno plots before and after? The richer readings throughout the pull suggest that you are in a higher load column, but I wonder if the higher load column was truly because of higher airflow or because the filter simply alter the maf scaling to show a higher airflow.


Eric

 

In my testing it made 1 more psi and moved over one load column. I don't do 2byte mods on customer ecus so the HZ I do not know.

 

So it made the a/f ratio richer because the maf noticed more air? (just trying make sense of why in my mind)

Could it be possible that the reason this filter makes you run richer because the transition is not smooth (from filter to transition maf) ?

 

In my testing the AFR got richer even though I hit the same load cell before and after the filter was installed. I would assume that the rich AFR was a result of something else at least on my car.

 

You gained 1 psi but ran the same load?

 

got mine today...man its kinda big compared to the KN im using. But looking at it, I can see why it may be beneficial over the maf adapter types in not throwing off maf readings

Since the filter housing itself full covers the maf opening, there is less chance for vortices and such to develope like you can see out of the traditional style

 

I gained ~ 1 psi in the power band NOT @ peak boost. That is why the 3500 rpm load did not change much. On my car the ~1 psi gain in boost came after 5500 rpm.

 

do u have a picture of what it looks like? or do you simply mean it looks just like stock but the filter is inside the box?