The ECU does sort it out by adjusting your closed loop fuel trims, and since the diameter of the MAF tube hasn't been changed I'd assume that his open loop fueling is within 5% of stock. Still not optimal for squeezing every last hp, but should be ok this way. It's when people go and throw on a 3.5" intake on their stock car, that you run into problems because open loop high-load fueling will be FUBAR.

 

i would say just save up for a legit intake and problem solved or get a drop in .. you will be able to hear the turbo (but not as loud) and also keep your stock box like that u won't have to worry bout anything

 

Thank you!

 

You dont need a water shield unless it was a true CAI that goes down behind the bumper and fender where water from deep puddles can submerge the intake and create water lock. You will be fine without a water shield, all other people running short ram intakes with cone filters dont use one.

As for the tuning part, damn near all vehicles with turbos require a tune when modding the intake or fuel system because your dealing with a lot of air being crammed into the cylinders from the turbo so everything has to be in sync or you will get knock, detonation, etc. Other cars (usually naturally aspirated/non turbo) dont require a tune with an intake mod because the computer can manage that air flow change because there isnt 20 PSI of boost cramming into the engine requiring the appropriate timing and A/F ratio.

 

I wouldn't worry about a shield (for a short ram). I'm running an ams intake and I've been through some crazy storms. All vents open. Never had a problem.

 

If you can afford Evo you can afford decent intake

 

always good to tune with any airflow change, no shield is needed where your filter is at currently. I am not sure how much of a benefit there is of keeping a sealed box or a sealed intake for normal use, track use would be a different story.

 

I think you are misunderstanding how our cars ECM functions. To put it very simply, this is a metered air system. It uses a MAF sensor that measures change in airflow. It takes these measurements near the filter in the charge pipe. Due to the nature of this sensor, it is sensitive to changes in filter type, pipe design, and pipe diameter. The stock ECM does have a window for corrections, but it is not an auto tune feature.

Some cars may have a MAP or Speed Density set up, where the filter design has a much smaller impact on the tune. That system relies on pressure measurements...and secondary sensors like baro, temp, etc.. To keep the tune optimal. However, for a daily driven vehicle, a metered air, Or MAF based system is desirable.

Hope this helps a bit.

 

Made a custom heatshield that uses the oem snorkel opening.

 

^Looks good

 

Just to clarify what you said, our Evos use both a MAF and MAP system to calculate load/airflow and adjust fueling accordingly.

 

Hey guys i know this is probably weird to be asking. But does anyone have a oem maf housing plus bolts they can donate?

 

^I might have the stock maf laying around somewhere. I'll let you know IF I find it.

 

sweet!!

 

anyone know the actual power difference between a SRI and CAI? CAI seems so much more expensive than a SRI