Article Comments - 2007 Mazdaspeed 3 by Mazdaspeed Accessories

62 messages, Last post on Oct 06, 2008 at 12:14 PM

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What is this discussion about? Mazda MAZDASPEED MAZDA3, Hatchback

Full Test: 2007 Mazdaspeed 3 by Mazdaspeed Accessories - he factory-tuned version of the Mazdaspeed 3 is a preposterous pocket rocket that straps nearly 300 horsepower to a chassis riding on a racetrack-type coil-over suspension kit. All the good stuff comes from Mazdaspeed Accessories, so this is the Mazdaspeed Mazdaspeed 3 (Mazdaspeed2?).

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#53 of 62 Re: WHAT ABOUT THE Fujita f-5 c.a.i. ? [mrgeezertoyou] by roadburner Jul 10, 2008 (8:37 am)
Replying to: mrgeezertoyou (Jul 10, 2008 7:33 am) Can someone explain how a "cold air intake" located inside the engine compartment can possibly bring in colder air than the factory intake through the front grill and through the hood tunnel? I'm willing to be proved wrong, but these things seem like a crock for a car that already has a well designed intake tunnel. It's actually more of a function of the restriction of the OEM filter housing; the MS CAI shows a gain of 20 hp based on dyno charts I've seen. Ditto for the Cobb SRI and the CAI offered by cp-e. For some actual intake dyno charts check here.
#54 of 62 Re: WHAT ABOUT THE Fujita f-5 c.a.i. ? [mrgeezertoyou] by aviboy97 Jul 10, 2008 (2:20 pm)
Replying to: mrgeezertoyou (Jul 10, 2008 7:33 am) The air filter for the CAI is located near the bottom of the car, and does intake cooler air found near the road, rather then up in the engine bay. CAI's are also much less restrictive then stock. BTW, you will not damage your turbo by using regular. Fuel does not go through the turbo. The engine its self needs premium because it is a high compression engine. Premium is required to prevent pre ignition. Regular fuel would ignite before it is supposed to, causing a knock. Replies to this message: mrgeezertoyou (Jul 10, 2008 7:03 pm) roadburner (Jul 10, 2008 8:10 pm) indydriver (Jul 11, 2008 2:19 am)
#55 of 62 AVI-What's the latest by indydriver Jul 10, 2008 (4:13 pm)
on Mazda re-issuing their branded CAI? I have heard directly from cp-e that they submitted their pipe for evaluation as a private label candidate. The original supplier, AEM is a low-end product.
#56 of 62 Re: WHAT ABOUT THE Fujita f-5 c.a.i. ? [aviboy97] by mrgeezertoyou Jul 10, 2008 (7:03 pm)
Replying to: aviboy97 (Jul 10, 2008 2:20 pm) Detonation, or premature ignition, in a direct-injected cylinder, can cause back pressure which will damage the turbo impeller, or so I've read. They don't spec champagne just to make you feel special. As for cooler air closer to the ground, the non-overlapping intake elevation is probably no more than 6 inches, and I doubt much temp difference in that range. The "less restrictive" argument is hard to quantify without a bunch of gear, which is why I suppose everybody points to the intake manufacturer's charts, which of course favor the aftermarket intake. Don't get me wrong, they may really make a difference, but I have a hard time believing the claims of 25 hp. Just for fun, let's look at some numbers for the less restrictive airflow argument. The stock intake measures a nominal 121 square inches in area (11x11.) Assume a truncated conical intake six inches long (based on K&N replacement filter,) and six inches in diameter on the big end. Not much air is going to come in at the bottom edge where the filter cone attaches to the pipe, so let's pretend the cone is inverted and not truncated. Using those numbers, the surface area of the cone is about 38 inches square. Not even close. If the intake area is smaller, how can the overall part be less restrictive? Replies to this message: roadburner (Jul 10, 2008 8:10 pm) indydriver (Jul 11, 2008 2:19 am)
#57 of 62 Re: WHAT ABOUT THE Fujita f-5 c.a.i. ? [mrgeezertoyou] by roadburner Jul 10, 2008 (8:10 pm)
Replying to: mrgeezertoyou (Jul 10, 2008 7:03 pm) The "less restrictive" argument is hard to quantify without a bunch of gear, which is why I suppose everybody points to the intake manufacturer's charts, which of course favor the aftermarket intake. I've seen similar results(20-25 whp) generated by private individuals who have performed before and after dyno tests. Even Mazda claims that the MS CAI and CBE are good for 30 hp. And let me guess, you are an EE, correct?
#58 of 62 Re: WHAT ABOUT THE Fujita f-5 c.a.i. ? [mrgeezertoyou] by indydriver Jul 11, 2008 (2:19 am)
Replying to: mrgeezertoyou (Jul 10, 2008 7:03 pm) This isn't worth debating. The size of the airbox is irrelevent if it doesn't allow unrestricted air flow. CAIs have proven to be one of the first and most cost effective power mods on any vehicle for decades. All you have to do is spend 10 minutes on the net to find all the evidence you could possible want.
#59 of 62 mazdaspeed CAI by rsalyerds Aug 28, 2008 (6:46 pm)
Speaking of CAI's, I know there has been a freeze on the sales of mazdas own CAI because of some bugs. Anybody know what's going on with that? I've been waiting for months and still no word. Replies to this message: roadburner (Aug 28, 2008 7:58 pm)
#60 of 62 Re: mazdaspeed CAI [rsalyerds] by roadburner Aug 28, 2008 (7:58 pm)
Replying to: rsalyerds (Aug 28, 2008 6:46 pm) The Mazdaspeed CAI is the same as the AEM CAI except for the MS CAI's filter and splash guard. AEM has recently added an air flow straightener to their version. The word from the more tech oriented Mazda boards is that it can be fitted to the MS CAI and that it does smooth out the Long Term Fuel Trims which was what caused the MS CAI to throw CELs in some-but not all-MS3s. Will Mazda add the new part and start selling their CAI again? Beats me...
#61 of 62 Mazdaspeed CAI Update by roadburner Oct 06, 2008 (10:42 am)
I bought an AEM air straightener from Street Unit for just $15 with free shipping. So... I'm going to bite the bullet and install the MS CAI with the straightener in the couple of weeks.
#62 of 62 Great article in new Road & Track by indydriver Oct 06, 2008 (12:14 pm)
on an '07 MS3 with all the factory go fast mods. They credit the CAI with all the power increases. Hmmmm......