whats up crew. i have an 09 factory jcw. the intake looks to be pretty logical and thoughtfully designed.

now i know that sound wise, the DoS intake is superior.
however, talking about performance is it worth to make the jump to buy the DoS intake..

OR

would it make more sense to just buy a drop-in K&N to replace the paper filter on my factory jcw intake?

not trying to bash the DoS at all, but does it make sense to pay the extra 150-200$ to get the DoS or to just get a K&N drop in? anybody know what the hp gain difference would be between the two options?

 

Ask Clint: http://defendersofspeed.com/store/contact-form.php

He's a stand up guy.

 

If noise is an issue get the JCW Stage One airbox. That has a much better flowing cone filter. Then replace the supplied paper cone filter with the MINI Mania cotton media oiled filter for some seriously better air flow than the stock setup. If noise is not an issue, then the DOS is best!

 

. . . but what if noise isn't an issue anymore?



http://defendersofspeed.com/store/product.php?id_product=18

 

Well..... If that is the case, then I might have to get one of these for my Stage One JCW. I would like to here the setup first. Nicely done!

 

Here you go!

http://www.youtube.com/watch?v=_gIyXt0ath8

 

Very nice!!!

 

Is the DoS CARB certified? The JCW is.

 

Regrettably, no, it's not CARB certified. However, as you'll see, our competitors are not either.

It makes complete sense that the JCW airbox is CARB certified, BMW has the cash and time to handle this (plus, they're required to seek this certification as a major automaker).

For folks that are genuinely preoccupied with maintaining complete and utter CARB guidelines as part of their life path, an aftermarket CAI does not sound like a viable option. However, if you're concerned with not raising any flags at emissions check time but still want to go aftermarket, I'd hold on to your stock airbox.

 

In CA cops can bust you for running non-CARB approved gear, and emissions testers will fail you on visual inspections. Minimally you would need to revert to your stock airbox whenever getting a smog test.

 

Hi tazio,

I may just lead a charmed life, but I've lived in CA for 4 years now and have never been busted by cops or emissions testers with aftermarket equipment on my car.

I guess that it just mainly depends on where you live in CA and how lenient your law enforcement and emissions professionals are. Has anyone given you trouble for this type of stuff?

 

Don't drag race (or attend), don't slam it to the ground, straight pipe (catless dp in our case) or 2000w bass drivers, don't drive like a jerk and most likely you'll never get hassled by LEO. That's what i learned over the last 20 yrs to keep me out of trouble.

no open elements or open breathers will pass visual when you smog, IME. my acura would always fail visual with an AEM short intake w/o breather pipe.

 

Im in CA also, Cops dont look at Mini's you need to be doing something really dumb to get pulled over. Or you need to drive a honda, that always gets you pulled over.

 

The DoS CAI is AWESOME buddy. You not gonna have any remorse from getting it. I live in NY so the laws are not as strict as CA for performance cars. The NYPD will most likely to have you pop the trunk before the hood for some rocks. You know what I mean

 

Oh, yeah. I've been failed twice by CA emissions testers for having "aftermarket" parts. Once for an intake and once for a header. Two different cars. Had to take them back to stock and go to a special "referee" station to have everything checked. Not fun. Definitely take your car back to stock (at least what is visible) before you get smogged.

 

sorry guys, not to hijack my own thread or anything, but we're getting a little off topic here. just wondering what the real performance difference is (if any) because sound is not an issue for me. either/or works. i just wanna kno whats MORE worth it for the price lol. is the hp gain significant enough to justify 150-200 dollars more than just a K&N drop-in for my FACTORY JCW intake.

thanks for the help!

 

10 whp gain with the Dos

 

when tuned for the intake? or right out of the box?

 

out of the box and tested on a dynojet dyno with 97f temp and 60% humidity day .

 

Thats just like James, never gives any specifics

 

now james, i kno the DoS will produce 10whp as mentioned in other threads i have read. im pretty sure most people are talking about a 10whp gain over stock (possibly a stock MCS intake).
but will the DoS also produce a 10whp gain over a factory JCW intake with K&N drop-in? im guessing not.

btw, someone please correct me if i'm wrong lol, just trying to pick my best cost-effective option!

 

nice! that's almost as hot as it is here..

good news for me..

 

the biggest gain with the dos is having the second coldair source in the cowl and avoiding heatsoak that comes with only having one source of air like the jcw and factory airbox .

I did my testing on a dyno with only a cooling fan on the fmic .

 

you must have me confused with m3tuning

 

did u do back to back runs on the same day?

stock vs DoS?

hood open or closed?

at the time u installed the intake was the rest of the car stock? or did u have other breathing mods? (DP exh etc)