GB: Mazdaspeed3 Mazdaspeed Cold Air Intakes

[camrycev6]

I may add the MS Cat-back later on since that is all covered. But as far as aftermarket performance stuff...(Like the new intercooler or the turbo-back exhaust...)... no. Not this soon.

 

[nondual]

So U won't be upgrading ur DP or exhaust then, right?

I'll upgrade a full turboback AFTER the warranty.

I MAY upgrade the TMIC if it's an easy thing to put on/take off. I'd LOVE to install a XEDE if it becomes plug and play, but if it doesn't I'll add it, engine mounts, and suspension tuning after warranty.

 

[camrycev6]

I have my Dyno results:

I will be getting the file via email tomorrow, so I can post more data then. (In another thread....) For now, here are the raw numbers:

Max Power = 257.4
Max Torque = 271.9

@ 4.65 RPMS, A/F = 11.3

Pretty good increase over stock.

 

[Captain KRM P5]

I'll upgrade a full turboback AFTER the warranty.

I MAY upgrade the TMIC if it's an easy thing to put on/take off. I'd LOVE to install a XEDE if it becomes plug and play, but if it doesn't I'll add it, engine mounts, and suspension tuning after warranty.

TMIC is a fifteen/twenty minute swap at the most, very easy

 

[Speedy3]

I have my Dyno results:

I will be getting the file via email tomorrow, so I can post more data then. (In another thread....) For now, here are the raw numbers:

Max Power = 257.4
Max Torque = 271.9

@ 4.65 RPMS, A/F = 11.3

Pretty good increase over stock.

Nice. I calculated my full load A/F ratio change from 12.2 stock to 11.5 with the Mazdaspeed CAI. Your measured A/F lines up pretty close to my calculated (based on OBDII parameters). Does anyone know if this is a safe level? It is still rich considering that anything below the stoichiometric value of 14.7 is considered rich, but how does 11.3-11.5 compare to other cars? Is it still a safe value? How lean can it go?

 

[camrycev6]

Thanks. As far as the A/F mix goes, I am not an expert on the subject. I know my old supercharged G35 coupe was running around 11.5 on the A/F mix and that was done via a reprogram of the ECU. I will have to defer to the experts.

Considering we are running in the 11s, we are still running pretty darn rich, which means we could lean the car out even a little more and still be safe.

If the stock version of the car was running in the 12s, I guess we are running even richer than before. I read reports of people getting better gas mileage with the CAI, but wouldn't it be a little less if we are running more fuel? Also, simple physics says you can't get something for nothing, so if we are putting out more power / torque, that energy has to come from somewhere....and I don't carry any other high energy chemicals other than gas in my car....

 

[CTGrey02]

Among Mustangs, the general concensus for a blower car is 11.5-12.0 across the board for A/F. Anything below that and your just washing your pistons. 14.7 you're gonna be pre-detonating. For the record, my GT generally runs around the high 12's, low 13's for A/F readings on the dyno. I need larger injectors. All the dyno's I've seen of the MS3 so far go off the chart rich which is just as bad. Does your just peak in the 11's or is it in the 11's all the way across now?

 

[camrycev6]

I have to wait until I get the files or get home to look at my print out again to be sure, but I am sure it was NOT 11s all the way across. As I recall it started off much leaner, was 11.3 in the middle, and got richer all the way to the end. (In the 8s...)

 

[Speedy3]

Nice. I calculated my full load A/F ratio change from 12.2 stock to 11.5 with the Mazdaspeed CAI. Your measured A/F lines up pretty close to my calculated (based on OBDII parameters). Does anyone know if this is a safe level? It is still rich considering that anything below the stoichiometric value of 14.7 is considered rich, but how does 11.3-11.5 compare to other cars? Is it still a safe value? How lean can it go?

I phrased this incorrectly.

Actually, the car looks to be running about 2% leaner despite the richer commanded A/F ratio with the MS CAI. The ECU is commanding 11.5 under full load as oposed to 12.2 in the stock configuration. The actual is A/F ratio is not easily deterministic from OBDII data.

Here is my original post on a different thread:

First off, the numbers indicate that the First O2 sensor is measuring the A/F to be about 8% leaner than stock with the MS CAI. The good news is that the ECU is commanding a decrease in the A/F ratio (Richer) by about 6% to compensate. The Commanded A/F ratio under peak load in stock config was about 12.2. The Commanded A/F ratio under full load with the MS CAI was about 11.5. This is the commanded A/F ratio based on compensation learned from feedback while previously driving, so it seems, it is compensating for the MS CAI. I also noticed during the dyno tests that almost the same density of black smoke was coming out of the exhaust in stock vs with MS CAI. So, despite the difference in diameter of the MAF housing (as posted by flyrevs and cp-e) and the increase in air-flow from stock to MS CAI, it seems the MS 3 ECU is adjusting the A/F ratio to keep the car from running too lean. Initial results look like it is about 2% leaner.

 

[IDRVSLO]

Hey Captain are you still offering the 289+shipping price? Also are they in stock? I am looking to pick one up as soon as possible. Please let me know either here or at my email. scott.glasser@gmail.com Thanks

Scott

 

[camrycev6]

Speedy3, that makes more sense to me. I would agree with your conclusions as well. It seems the ECU is adjusting "automatically" to the lower temperature and increased airflow provided by the CAI.

 

[Speedy3]

Speedy3, that makes more sense to me. I would agree with your conclusions as well. It seems the ECU is adjusting "automatically" to the lower temperature and increased airflow provided by the CAI.

Here's some OBDII data on the "Commanded A/F Ratio" with the MS CAI. From my calculations, the car is actually running 2% leaner than this.

 

[CoachZed]

Does anybody know if the rich fuel mixture is connected to the engine's DISI, or the high compression? What a/f ratios are comparable engines like the VAG 2.0t running?

 

[peanutsparts]

Does anybody know if the rich fuel mixture is connected to the engine's DISI, or the high compression? What a/f ratios are comparable engines like the VAG 2.0t running?

It probelmly the DISI injection system design.

 

[Captain KRM P5]

It probelmly the DISI injection system design.

its not inherently the result of direct injection, its the tuning and mapping mazda coded to the ECU that controls injector flow and timing, both of which are critical factors to your engine's air/fuel ratio. it also doesn't help up top that the throttle plate closes up while fuel flow remains constant, inducing a rich condition.

 

[0-c4t]

i just bought mine and installed myself. dealer wanted 225 even with my sisters employee discount. i installed it in about 1.5 hours. i was being very carefull with my new baby i havent dyno'd it yet but ive seen others and the gains seem to be amazing. i definately noticed the power increase, especially in lower gears. sounds unbeleivable too!

 

[camrycev6]

Pissed..... very pissed... dyno company promised he sent my charts. To two different addresses...I have nothings still. Not happy.

 

[Funkycoldg]

I am amazed and have a greater love for my car. I got it installed yesterday buy my mazda dealer since I dont have a great place to do it myslef and have been very busy with work lately. I love listening to the Engine now with the CAI and blow off valve sounds!! Soo NICE!! You guys will get a kick out of this story... Well first I had a huge problem asking my dealer to do it since he still thought it voided your warranty but I got that all straightened out. Oh and before that I called 3 different dealers to get an estimate of how much they wanted and the answers I got were $135, $220-$320 depending what was all involved and $70. Well my dad took it to the dealer I bought the car from for $70 and it took "their best mechanic" 2 and a half hours to install it. HAHA!! I had to laugh because of everyone saying it was taking an hour to an hour and half to do it. Well its all good and they did charge me the extra time. I am just happy it is installed! Thanks to Jason from onlinemazdaparts.com for all of his help!

 

[camrycev6]

They took 2.5 hours to install mine at Mazda. BTW...here are my dyno results....

http://www.mazdas247.com/forum/showthread.php?t=123662934&page=3

 

[mdl247]

lol this intake is good for 1 tenth of a second off on your 1/4 mile, well from my experiences atleast.