Last post on Jan 14, 2013 at 8:55 PM
You are in the Speed Shop Tuning and Modification
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Mazda MAZDASPEED MAZDA3, Performance Mods, Hatchback
#9 of 12 Re: Mazdaspeed 3 Cold Air Intake Test [Mr_Shiftright]
Aug 31, 2012 (10:08 am)
It's actually very true. Adding an intake to a speed 3 adds pretty substantial horsepower and torque. I would say at the very least 15-20 HP (this should not be a surprise Mazaspeedís are pushing stock 15.5 PSI, thatís a lot of boost). I added one on my 2010 and I had no expectations of any increase. Boy was so wrong. My car is so much faster. The increase is instantly noticeable and the sound of the turbo just shows you how much better the car is breathing. When you look at the stock box VS an SRI the difference is huge. The stock box has sooooooooooo many restrictions it's crazy. The inlet the sucks in the air is tiny, it was no wonder my turbo had so much lag. Everything was bottle necking. The stock box was obviously designed to keep this turbo quite, which was probably very hard to do considering that this car runs stock at 15.5psi. Mazda cannot release a car with a noisy turbo. I'm sure they have to meet a ton of noise standards that restrict the cars performance. Anyway, an SRI deletes any previous restriction the car previously had. My turbo has virtually no lag, my car is faster, the idle is way smooth, and I even get better gas mileage. Just goes to show how bad the stock box was killing HP.
#10 of 12 Re: Mazdaspeed 3 Cold Air Intake Test [rustysurfsa]
by MrShift@Edmunds HOST
Sep 03, 2012 (10:07 am)
Well there's "seat of the pants" metering and there's a dyno. I'm sure Mazda did leave a little HP on the table for the sake of noise control, but 20 HP is a whoppin' amount simply for a CAI.
What you will get is a lot better throttle response so that could make the car seem faster. Also MPG has to be measured over a length of time.
#12 of 12 A little more than capable
Jan 14, 2013 (8:55 pm)
Mazda left alot on the table for the speed 3. It is very easy to extract power out of the engine. A Cobb OTS map alone will yield at somewhere around 25hp / 50tq for stock configuration.
A CAI doesn't do anything a SRI can't do for the MS3. If you think the CAI yields alot of power, wait till you get a tune and unleash the torque.
Mazda tuned the car extremely conservative from the factory. This is what the car is capable of with bolt ons on stock turbo.