This is what's in progress ,
If it all works out well the system will use factory air filter , while allowing up to 40% more air flow .so no compromise as far as filter efficiency.
stay tuned

 

Not trying to be funny, but is that the filter from a Shop Vac? Because that's almost exactly what the filter on my Shop Vac looks like.

 

A filter is a filter they got plenty of car filters designed like that

 

I'm always overly skeptical about home made solutions to problems that never existed.
When and how did you determine that we all had this problem?

 

I can't see how it can allow 40% more air flow - please show actual measurements at WOT that are so much bigger.

 

They do flow more for sure. I can't however measure the exact difference. Going by manufacturer claims our single filter is rated at 300 cfm, vs the new filters rated for 500cfm each .
And comparing filtering area vs hp, our oem setup is on the low end for size compared to other vehicles.

 

The same time that I figured out that 416 stock up wasn't enough and now nearly 100hp over that

 

Is that going to affect your custom tune or will the ecm adapt....i am seriously looking at getting your tune for my 06 str after pulley is swapped out

 

Well so far results are inconclusive, maf readings seem to be higher than before indicating higher flow , but still have to verify on the dyno. There are some parameters related to intake restriction in the ECU , I haven't touched them yet ..

 

The filter itself may give higher flow, but the inlet area in the housing seems restrictive.

What about when you drive in the rain? Seems like they would easily get wet in that position.

 

The question you should have been looking at is not how much more air will one filter flow over the other.
You should be asking how much restriction is the air filter causing- the answer is nothing in all practicality.
Just pull the filter off, i.e 0% restriction, you car will not suck more air and not produce more power.

Air filters dont have the restriction you think they have.

 

I understand the thinking of this if there was not a supercharger involved but the supercharger negates any increase in air as it is already pumping as much as it can....no?

 

Not exactly. Supercharger, simply put is an air pump. Any restriction in the intake side is a loss of potential boost .

Here is a good article http://kennebell.net/tech/supercharg...ncy-explained/

 

Very informative read ...easy to understand....now it makes sense why max hp on my str is closer to redine.... whereas max hp on my 6 liter n/a chevy is more in the middle as engine vacuum decreases after a certain point.....bottom line is, i wish i had a twinscrew

 

Scott there is plenty of potential locked up in the 4.2 engines if you have seen my Dyno charts threads.
Regarding the intake, I have a sneaky suspicion that I was correct and our oem filters are undersized. So far I'm setting records for highest maf readings ever and numbers do make sense. Still working out the kinks of our system which is very sensitive to air flow difference of each side. luckily with help of SDD JLR I can monitor each MAF sensor and adjust air flow as needed by blocking or opening up to even out the flow on both banks..

 

Ok, so I’m talking out of my **** here, but if the car is sensitive to airflow difference between sides, and all that air, from both sides goes to the same place, wouldn’t life be easier (when making these types of mods), to just put both sensors on the same side? Then they’ll read the same.

 

Good idea but you're forgetting that the other side is going to be left open and unmonitored . It needs to calculate the total air by monitoring both openings, so if one sude flows more than the other but you have 2 maf on one side you might not get the correct reading

 

you speak of 2 sides on your xkr...does that mean you have 2 intake tubes feeding your supercharger vs the 1 like I have on my str

 

Correct , 2 intake tubes, 2 maf and 2 filters

 

ok...I did not know that...never seen an xkr engine....you have more potential hp than me I would think with more potential airflow to increase fueling.....maybe that is why the same year xkr is rated 420 hp and my str 400 hp, if i am correct