Intake, Real HP or just noise???
- Thread starter sierra248
- Start date
desperado-c
Member
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- Mazdaspeed3
Definitely makes more power with the CAI. I don't know about 25 whp more but 15-20 sounds reasonable. I got an increase of 15 whp in dynos run a couple weeks apart with conditions being nearly identical. I think I probably would have gotten 20 whp with a better cooling fan setup during the dyno.
Well by reading around allot it seems that a CAI will probably help me most now and a Cobb SRI would probably help me most when and if the Access Port is released, though these differences are mostly A/F ratio differences more then anything. Don't want to start a CAI vs SRI thing. I think I may just try and take him stock and get some Baseline numbers before the Access Port is released, I really would like to see Cobbs Dynos with stock Intake vs Cobb Intake once the AP is out. Even if he beats me, I'm pretty sure with some stickier tires and that Access Port were already gonna be a 13.2-4 car (Just a guess, I always consider it a 14.0-14.2 car Stock). Wish the AP was gonna be available for Christmas, make a good present under the tree, 15 minutes later, I got 30-50 more whp and Torque(Again a guess).
Thanks for all the input fellas, I appreciate it.
Tom
Thanks for all the input fellas, I appreciate it.
Tom
drledford93
Member
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- Mazdaspeed 3
Hey Red,
Would your DIY CAI, transformed into a SRI, equate to the Cobb SRI for the Cobb AP? I would say so, wouldn't you?
Daniel
Would your DIY CAI, transformed into a SRI, equate to the Cobb SRI for the Cobb AP? I would say so, wouldn't you?
Daniel
The COBB sri has a straightener grid that smooths the air flow. So it will minimize the chances of trigger a cel. Some forum members that modified my custom cai into a sri did not had good results. Is the same concept, but I don't think a custom sri will have the same results.
Anyway, with plenty of dyno sheets showing 20+ whp with a cai, I ask, why getting a sri that will get you about 10 whp? Unless you live on constant flood area. (boom01)
chriscecc914
Member
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- 06 MS6
haha!! no offense but some of you actually believe the access port is going to be released soon...
desperado-c
Member
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- Mazdaspeed3
Well, when CP-E says their CAI yeilds 19 hp and Cobb say their SRI yeilds 13 (Mustang), you have to wonder how likely a 25 hp gain really is. I haven't seen a million threads with before and after CAI dynos and a search for thread titles with "CAI" or "intake" and "dyno" turned up none. But I did find one in the dyno thread that showed 25 hp in the dyno thread.
Then again the director of the Mazdaspeed accessories program is quoted as saying "about 30" (bhp, I'm assuming), so 20-25 on a Dynojet is probably about right. I'd also be interested to see if the power gains hold up after the PCM has a chance to adjust long term trims. Others have pointed out lean conditions seems to be adjusted out over time.
AutoXRacer
Member
I would imagine you can just reset the ECU...by disconnecting the battery to wipe out the memory...
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- 2007 MS3
I'm almost positive that the official Mazda quote is 29 horse at the wheels for the CAI and CBE combo. In addition, it broadens the horsepower chart a bit (the torque curve couldn't get much broader), bringing up the areas that are less than the peak level quite a lot, so while the "peak" doesn't go up much, the overall effect on the powerband is supposed to be pretty impressive with a guarantee of no warranty issues.
The Cobb SRI has an air straightener in it to help make sure the MAS gets an accurate reading and prevent CELs. The MS CAI does not have anything special in it to "straighten" the air flow, but I have seen it theorized that the length of the tubing run accomplishes the same effect. This sounds reasonable to me.
Cobb is aware of the benefits of cold air intake as opposed to an under the hood intake. They are supposedly working on a box to convert their SRI to a cold air setup. The filter will sit in an insulated box, which is getting its supply from in front of the car. This seems like the ultimate setup. Ease of maintenance without worrying about hot air limiting our safe boost levels.
The Cobb SRI has an air straightener in it to help make sure the MAS gets an accurate reading and prevent CELs. The MS CAI does not have anything special in it to "straighten" the air flow, but I have seen it theorized that the length of the tubing run accomplishes the same effect. This sounds reasonable to me.
Cobb is aware of the benefits of cold air intake as opposed to an under the hood intake. They are supposedly working on a box to convert their SRI to a cold air setup. The filter will sit in an insulated box, which is getting its supply from in front of the car. This seems like the ultimate setup. Ease of maintenance without worrying about hot air limiting our safe boost levels.
desperado-c
Member
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- Mazdaspeed3
I have not seen anybody specify that the increase is 29 whp. Do you have a link or a quote or something? Anybody got a dyno?
As far as a guarantee of no warranty issues, that is specified absolutely nowhere. Unless you have the parts installed prior to taking delivery, you get the Green warranty. That is a replacement of parts only. I don't care what the dealers say, they are guaranteeing nothing. You are relying on unofficial policy unless you have a separate writing from Mazda NA.
desperado-c
Member
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- Mazdaspeed3
Interesting point, yet it still doesn't match the stock trims. CP-E has the straightener and does match the stock trims. But I gather this has more to do with having a larger diameter MAF housing.
Cobb has said many times they don't think it makes much difference except under 30 mph. They even went as far as to say that the box will be pretty much just b/c customers think it matters, Given that mindset, you gotta wonder if it will actually make it into production. BEGI, on the other hand already has what they call a "cold air box" with heat shielding on the top and facing the engine bay. It draws air from the corner of the engine bay through the hole that goes into the fender.
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desperado-c
Member
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- Mazdaspeed3
Nice work but a quick scan shows lot of afters (many with other mods), not that many before and afters. Anyway, I already conceded 25 whp gain on a Dynojet, even though this post suggests the average at 5600 rpms is 18 whp: http://www.mazdas247.com/forum/showpost.php?p=3068850&postcount=51.
Still don't know how long term trims affect the results. I suppose I can find out by doing another dyno myself.
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When dynoing a car, it is more than just what it should be making. You have to take in air temps, ambient shop temps, hood open or closed, the gear its done in, etc. On an amazing day, I could see the Mazdaspeed, or any true CAI for this car for that matter, pulling out 30 at the wheels.
However, for the most part, the CAI are going to vary somewhere between 15-20fwhp, with some over and under the mark. It all depends on the circumstances. The actual amount gained is debatable. However, as far as air flow bolt ons go, its pretty much recognized that the CAI is the best bang for buck modification you can do.
However, for the most part, the CAI are going to vary somewhere between 15-20fwhp, with some over and under the mark. It all depends on the circumstances. The actual amount gained is debatable. However, as far as air flow bolt ons go, its pretty much recognized that the CAI is the best bang for buck modification you can do.
I have no dyno sheets for before and after. I'd speculate that most of us never dynoed before and after.
After I installed the CAI I wanted to say it made no difference. I wanted to come to this site and tell all the MS3 fan bois to suck it, because it's the same perception mod I made on my 1.8T GTI. (which gave no felt gain)
I couldn't. I noticed an increase in power immediately. My car responded to the mod very well and honestly, for the money spent I've been unable to get another HP per dollars spent mod to equal it.
It's also very quiet. A tiny bit louder but not enough to worry you. Or worry me I should say.
After I installed the CAI I wanted to say it made no difference. I wanted to come to this site and tell all the MS3 fan bois to suck it, because it's the same perception mod I made on my 1.8T GTI. (which gave no felt gain)
I couldn't. I noticed an increase in power immediately. My car responded to the mod very well and honestly, for the money spent I've been unable to get another HP per dollars spent mod to equal it.
It's also very quiet. A tiny bit louder but not enough to worry you. Or worry me I should say.
