Performance Intakes are way over priced on x-types I have noticed, which is what I own. Has anyone put together one using tubing and air filter from an automotive store like Autozone?

 

well I made one with intake tubing and a filter with a heat shield. Looks legit for a freebie part.

 

Pics? I've been eyeballing the Spectre products... Any seat of the pants reviews on your setup?

 

Yes I can post a few pics. On my "butt dyno" it felt like mid to top end rpm pulled faster.

 

That's kinda what I figured you'd get. I feel the stock intake setup would be restrictive at high(er) rpms. I'd really love to see some pics of how it's set up. What intake filter did you use?

 

turbo, any luck with those pictures? How did you mount the MAF sensor?

 

Updates?

 

I picked up a Spectre filter yesterday and installed it just to see if it made a difference. It definitely seems to allow the supercharger to pull quicker and is louder than the stock box. Next step is to move it away from the engine and shiled it.

 

Nice! I can't wait to get an intake kit on my X...

 

Depending on the model of car and what your stock airbox looks like on the inside, you can make modifications to improve airflow.

http://www.hondata.com/techkseriesairboxmod.html

I did this on my new Civic Si (hence the Honda website). I didnt notice any performance gains, but I do get better gas mileage. Only about 1-2mpg gain using just this mod, but with a K&N I get about 36mpg average whereas I only got 28 before.

Im sure a CAI would perform better, but for those who already run a K&N in a stock housing, any extra airflow is free mpg's

 

Speaking to the performance improvement offered by aftermarket air ductwork and a performance air filter, I used the factory items on my first trip to Maxton NC, to run the land speed mile there. On the second trip, I'd replaced the factory components with very fancy polished aluminium tubing. This made NO difference in my speed, so I don't believe it makes any performance improvement to an otherwise stock engine.

The sound improvement, particularly when paired with a complete cat-back exhaust system from Magnaflow was super. I'm sure that both the intake and exhaust improvements helped as I did other things to the vehicle.

KS

 

The X type intake airbox leaves some room for improvement:

On the 3 litre the intake manifold depression measured is 57 mbar (intake losses) for about 230 bhps worth of airflow. Compare this with the JV6 X202 engine- in the S type which is about 28 mbar at peak power.

You can do something simple- such as introducing another hole- with a bell mouth- but this will almost certainly increase intake noise:



The problem with the basic design is that there are recirculation zones within the flow- where collumns of air hit one another- which is very wasteful in terms of energy



The X type replacement was to have a detail orientated and optimised design, using square convlutes that dont intrude on the flow, bigger radiused sections and general detail design improvements that would have brought it in line with the bigger brother, the S type



Before I set about changing the airbox I would first measure and confirm the losses are 57 mbar and then go about fabricating and making detail improvements, all the while monitoring the intake manifold depression at WOT and peak power- where it is safe to do so.
Good luck!