Help with understanding performance upgrades

[mrtturbo]

It's my understanding that Mazda's torque sensing system in the 2010 speed 3 limits boost/power in the first few gears and depending on steering angle. With that said when you start adding performance parts, such as those I see offered from Corksport, it seems like we are trying to get more power out of the motor while the motor is trying to take it back.
Are the power gains from adding performance parts seen only while in higher gear, like 3rd and up, or can they be felt in 1st and 2nd as well?
Also, for example, with a car like the speed3 why would Mazda not offer a high performance downpipe with a divorced wastegate right from the get-go? I know at one time they offered a CAI for the first gen speed3 but then took it back. Would we expect to see a CAI and or exhaust offered for the new car, backed by full factory warranty? Thoughts?

 

[FWD FTL]

performance..

first of all, the ECU does limit boost in gears 1 and 2 due to the traction problems, all of which can be fixed through an AP.. Now, that doesnt exactly mean you cant feel performance mods in the lower 2 gears, but remember with the power band being so narrow, its hit or miss, but you do still gain HP and TQ in all gears.

 

[CorkSport]

You do still feel the power increases in the first few gears. With the torque/HP increased you can really feel the car doing its best to keep the wheelspin and torque steer under control but you can still feel the difference.

The divorced downpipe makes it difficult and more expensive to add a catalyst to the system. Mazda had to place the cat close to the turbo to help it heat up quickly to meet ULEV emissions.

If you are in our area swing by and I can take you for a ride in the shop car so you can get a feel for the power difference.

-Derrick

 

[ZPrice]

You do still feel the power increases in the first few gears. With the torque/HP increased you can really feel the car doing its best to keep the wheelspin and torque steer under control but you can still feel the difference.

The divorced downpipe makes it difficult and more expensive to add a catalyst to the system. Mazda had to place the cat close to the turbo to help it heat up quickly to meet ULEV emissions.

If you are in our area swing by and I can take you for a ride in the shop car so you can get a feel for the power difference.

-Derrick

Derrick,

Has Corksport modified the DP in your shop car? I was with a competitor last week and the statement is that "With a DP modification the 2010 MSP3 would tend to go lean due to the lowered back pressure". The ECU senses this as a lower load therefore leans out.

At present no one (that I no of) has the ability to reprogram due to the massive changes by Mazda.

 

[_Jason]

Derrick,

Has Corksport modified the DP in your shop car? I was with a competitor last week and the statement is that "With a DP modification the 2010 MSP3 would tend to go lean due to the lowered back pressure". The ECU senses this as a lower load therefore leans out.

At present no one (that I no of) has the ability to reprogram due to the massive changes by Mazda.

Did he comment what ranges they were seeing lean zones in the powerband? We haven't seen any undue enleanment of the fuel with the addition of our racepipe, downpipe and intake/cold air box. Our short term and long term fuel trims are still under 6 and the WOT AFR's are still in the 10's, low 11's at the leanest.

Jason

 

[ZPrice]

Did he comment what ranges they were seeing lean zones in the powerband? We haven't seen any undue enleanment of the fuel with the addition of our racepipe, downpipe and intake/cold air box. Our short term and long term fuel trims are still under 6 and the WOT AFR's are still in the 10's, low 11's at the leanest.

Jason

Jason,

Sorry for the delay, we did not go that deep into the conversation (I was traveling to my mothers - 8 hr trip) and needed to get back on the road. I do understand that there are some "preliminary" maps for the 2010, are you using the DH to gather the information?

 

[2010axela]

MS3 cel help

hello everyone,
got a 2010 ms3, black, its bout 3 months old now with 2k on it. I need help, its cel is on, i just installed a cpe dp w/ high flow cat, cobb sri, turbo inlet pipe, and now just this morning i the cel light just came on. havent had a chance to put it on a lift yet, but was wondering if anybody has any ideas. o and i removed a resonator.

 

[ASmitty]

Your o2 sensor hooked up in the correct spot on the exhaust? Only thing on the list of mods there that immediatley stood out.

 

[skatethesea]

I have my TP in and I havent seen a single CEL. And as for the leaning out. I honestly cant wait to lean out my car when the COBB AP comes out. It runs straight 10's on the dyno. And I have to wipe soot off the back non stop.

 

[skatethesea]

Thanks for the input^^^

I understand what you are saying. But you as well as I know that these vehicles run rich from the factory. And I havent touched the computer yet and I truly doubt intake and exhaust are enough to create a situation where it would need enough fuel to start taxing the pump. Now I dont know the specifics on the MS3 yet. But I can guess that the Stock Fuel Pump runs at peak 150-175lph and the injectors are most likely at or around 350-375cc? Maybe bigger, not so sure on that since it is my first Turbo car from factory. Please if you know i would greatly appreciate it. But I do look forward to getting a FPR and some gauges once I get some engine management. I blew out an engine in my S2000 because of a lean condition cause by heat and lack of fuel about 400 miles from my house. So I have learned my lesson once. hahaha

 

[skatethesea]

Im not trying to argue on the matter. You obviously know more about this than I do. And I agree that fuel pressure loss is far more detremental than a temporary lean condition. I just dont think it should be such a big issue with minor bolt ons. With that said I will be getting a FPR and a gauge for the fuel pressure once i actually do work on the car aside from SRI and CBE w/ TP. If and when an affordable pump comes out I would love to pick it up and throw it in there. But not until the AP comes out and can prove to be effective with fuel trim management and certain other aspects that are needed to tune the car outright for street and/or track use. And not to go too far off topic, but I am more interested in maintaining boost and essentially horsepower past 5300rpm. I hate having a thousand RPM that is useless. I miss my centrifugal supercharger