GB: Mazdaspeed3 Mazdaspeed Cold Air Intakes

[turbofever]

I am. Infact, I PM'd you early yesterday. Looks like I just missed out.

 

[blackspeed3]

im intrested

 

[Captain KRM P5]

i'll see tomorrow how many i can get my mitts on

 

[BSTD3]

i'll see tomorrow how many i can get my mitts on

Excellent. Thanks Capitan

 

[Brannon]

I am definitely interested. How much shipped to 92106?

 

[Speedy3]

New results on dry pavement. I couldn't do 4th gear though; it just takes too much time and my wife was already ragging at me for going to do the 3rd gear test. I ran 3 solid runs in 3rd gear today with the MS CAI on dry pavement. All the numbers below are mean values of 3 runs each.

HP/Torque Dyno:
Stock (3-2-2007, wet pavement, no slippage)
3rd Gear: 224.0 HP @ 5300 RPM, 238.8 ft-lbs @ 4233 RPM
Variation HP: +/- 2.3%, Torque: +/- 5.6%

With MS CAI (3-2-2007, wet pavement, some slippage)
3rd Gear: 247.5 HP @ 5200 RPM, 273.0 ft-lbs @ 4267 RPM
Variation HP: +/- 7.5%, Torque: +/- 11.3%

With MS CAI (3-3-2007, dry pavement, no slippage)
3rd Gear: 253.1 HP @ 5267 RPM, 264.5 ft-lbs @ 4300 RPM
Variation HP: +/- 2.2%, Torque: +/- 1.1%

The gains:

3-2-2007
HP: 10% (Equivalent to 290.5 HP compared to Mazda's advertised stock 263 HP)
Torque: 14.3% (Equivalent to 320.1 ft-lbs compared to Mazda's advertised stock 280 ft-lbs)

3-3-2007
HP: 13% (Equivalent to 297.2 HP compared to Mazda's advertised stock 263 HP)
Torque: 10.7% (Equivalent to 310.1 ft-lbs compared to Mazda's advertised stock 280 ft-lbs)

After a debate with CP-E, I realized that I may have introduced some error here. I ran the stock measurements with the original air filter. My car has 7K miles, so that air filter may have been restricting some air flow.

Here's what I plan to do. I will buy a new stock air filter, re-install the original airbox with the new airfilter and re-run the SW dyno in 3rd gear. This is going to take me a while because my wife is in college and approaching finals (I get to watch the kid on the weekends). Stay tuned though; I tend to do things anyways despite losing sleep!

 

[camrycev6]

After a debate with CP-E, I realized that I may have introduced some error here. I ran the stock measurements with the original air filter. My car has 7K miles, so that air filter may have been restricting some air flow.

Here's what I plan to do. I will buy a new stock air filter, re-install the original airbox with the new airfilter and re-run the SW dyno in 3rd gear. This is going to take me a while because my wife is in college and approaching finals (I get to watch the kid on the weekends). Stay tuned though; I tend to do things anyways despite losing sleep!

This data is extremely interesting. A couple of car mags, and Mazda themselves reports these gains from the MS CAI and the MS Cat-back. You are reporting basically the same numbers from the just the CAI alone. This leaves three possibilities:

1) The MS Cat-back offers a negligible perfomance increase and is for cosmetic purposes only.

2) Mazda / other mag sources were conservative on their numbers to be on the "safe" side. (Remember the Rx-8 HP SNAFU!)

3) Mazda never actually tested the CAI with the Cat back. (But rather just the CAI.)

In any case, I guess I will know shortly, but I know I will be "upset" that I am paying apprx $1100 for both the CAI / Cat-back, if I could just have the CAI for $400 with the same performance.

 

[Speedy3]

Official Dynojet Dyno of MS3 with MAZDASPEED CAI

I took the car in and had it dyno'd with the MAZDASPEED CAI Installed. The first 2 runs were with the hood open. The last 2 runs were with the hood closed. It was done in 3rd gear each time starting at 1500 RPMs (measurement must have started around 2k RPMs) and letting off throttle at about 6K RPMS. There were 2 large fans positioned 6 feet in front of the car and I estimate the were pushing the air at about 35-45 MPH.

Runs were 4-10 minutes apart and ambient temperature was around 63 degrees F.

I'm going to re-install the stock airbox and filter and go back for 4 more runs within the next few days. To give the shop credit, the test was done in Tacoma Washington at Turbo Technology Inc.

 

[Speedy3]

Also, the SW dyno numbers are very close to the wheel dyno numbers:

 

[dread]

it doesn't make sense that torque and horse power are almost equal on a ms3 I wonder if that is due too the smoothing on the graph. Nice work with all the dyno numbers by the way, this is very much appreciated. Its people like you that make buying easier for the rest of us. Its good to know you device is pretty accurate

 

[turbofever]

Awesome results.

zoom zoom!! (nana)

 

[Speedy3]

it doesn't make sense that torque and horse power are almost equal on a ms3 I wonder if that is due too the smoothing on the graph. Nice work with all the dyno numbers by the way, this is very much appreciated. Its people like you that make buying easier for the rest of us. Its good to know you device is pretty accurate

Yea, I'm just concerned why Rotus isn't getting the same results. Like I wrote before, I'm going to actually put the stock airbox back on, buy a new stock airfilter and re-do the SW and HW Dyno tests during the same weather conditions and same gas in the stock configuration so we can get a solid look at the tru gains of the MS3 CAI. When they were doing the Dynojet Research wheel dyno runs, I paid attention to the exhaust and there was less black smoke, but there still was black smoke, indicating it is still running somewhat rich.

 

[Speedy3]

it doesn't make sense that torque and horse power are almost equal on a ms3 I wonder if that is due too the smoothing on the graph. Nice work with all the dyno numbers by the way, this is very much appreciated. Its people like you that make buying easier for the rest of us. Its good to know you device is pretty accurate

I had him switch between smoothing settings and the graphs on all settings (1-5) looked pretty much the same.

 

[Speedy3]

it doesn't make sense that torque and horse power are almost equal on a ms3 I wonder if that is due too the smoothing on the graph.

Sorry for all the replies! One last note, the closeness of the HP and Torque may be due to the gear ratio of 3rd gear. I would presume that torque will be much higer in 1st and 2nd.

 

[Speedy3]

Lets start a thread to compare results from stock to addition of any CAI. Graphs or tables only with environmental parameters and initial conditions.

 

[Vermilion]

I'm interested.

 

[Hyun]

Im interested in CAI. I will check back here for update from you.

 

[dread]

any idea how the cai is affecting your air fuel ratios

 

[stretch]

any idea how the cai is affecting your air fuel ratios

Yeah, the air/fuel ratio is going to be the interesting thing here.

Also, Speedy, if you switch directly back to your stock airbox for the dyno, your fuel trims wouldn't have had time to adjust again yet. A user on another forum verified that the Mazdaspeed intake does indeed change them- in his case, by 9 points:

Long term fuel trim with stock airbox: -4 (average)
Long term fuel trim with MS CAI: +5 (average)

The ECU seems to be a bit confused by the MS CAI. I'm waiting to see if it will settle down in a couple of days.

This all goes back to what I was pointing out earlier- the Mazdaspeed intake gets its gains by altering the air/fuel ratio. I never disputed how much horsepower it made, just how it made it!

 

[Speedy3]

Yeah, the air/fuel ratio is going to be the interesting thing here.

Also, Speedy, if you switch directly back to your stock airbox for the dyno, your fuel trims wouldn't have had time to adjust again yet. A user on another forum verified that the Mazdaspeed intake does indeed change them- in his case, by 9 points:

This all goes back to what I was pointing out earlier- the Mazdaspeed intake gets its gains by altering the air/fuel ratio. I never disputed how much horsepower it made, just how it made it!

I just replaced the CAI with the stock airbox. I will record fuel trim and other parameters. I will reset the ECU.