rumors?

[uncletime]

i have read some things about the MS3 that kinda make me wonder... such as the engine pulls boost at 4500rpm? and that the ems cuts fuel during redlines?... kinda more concerned with the cut fuel at redline more than i am with the pulled boost... any truth in this?

 

[Mspeed3]

pulls boost? I assume means when it starts. WHich is more like between 2200 and 3000 rpms under full throttle. As for red line I dont hit because that is just stupid. If you research dyno runs you'll see that power peaks before redline and there is so much torque there is no reason to be above 6800 rpms

 

[dread]

yeah the engine loses most of its torque and hp at 5500 rpms, but you can shift before then.

 

[tru-boost]

you dont want to shift too early, you will be too low in revs for the next gear.
but yes the ecu drops boost drasticly as revs go up...dont worry though there are tuning systems to fix that.

 

[Mocoso]

i have read some things about the MS3 that kinda make me wonder... such as the engine pulls boost at 4500rpm? and that the ems cuts fuel during redlines?... kinda more concerned with the cut fuel at redline more than i am with the pulled boost... any truth in this?

You will be surpised as to the number of cars that cut fuel at redline... a LOT of cars have rev limiters built into the ECU (if not most of them) - as others have said no need to wait for redline to shift - its a 6 speed manual which means the gear ratios are closer to each other over say 4 or 5 speeds so I dont think starting at too low rpm will be an issue....

 

[ptperformance]

What happens when we start to install bigger turbos that take longer to spool? The addtional redline will be nice. Not sure if it pulls boost I would bet that it limits it. Fuel cut at redline is a industry standard but since the DBW t-body can pull back throttle I would be that they controll redline that way as well.

 

[Mocoso]

What happens when we start to install bigger turbos that take longer to spool? The addtional redline will be nice. Not sure if it pulls boost I would bet that it limits it. Fuel cut at redline is a industry standard but since the DBW t-body can pull back throttle I would be that they controll redline that way as well.

pull back on throttle just sounds so much nicer for the engine over fuel cut....

 

[ptperformance]

Yes it does, fuel cut is always hard on a motor.

 

[jeffmsp]

eh its spark cut isnt it?

 

[ptperformance]

eh its spark cut isnt it?

Thats even worse, does anyone even use spark cut anymore.

 

[Mspeed3]

If you go to a bigger turbo you'd be smart to get FMU anyways because the stock computer will not be efficient for the power you want to accomplish

 

[ptperformance]

If you go to a bigger turbo you'd be smart to get FMU anyways because the stock computer will not be efficient for the power you want to accomplish

Working on a EMS from Electromotive the TEC3R system. If that doesnt work then it will have to be the FAST system but that takes all new sensors to make it compatible.

 

[camrycev6]

2002 Corvettes cut fuel at the redline....trust me...I know.

 

[matsuda]

Yes it does, fuel cut is always hard on a motor.

Exactly why is that?
Many fuel injected engines cut off the fuel entirely while coasting.

 

[$inCitySpeed3]

from what i know and can feel from mine is it has a mangement system that reduces torque/boost in first and second to control torque steer...The Mazdaspeed 3 does not hit it's full 15.6lbs of boost until 3rd gear and up...and you can totally feel it...as for fuel shut off most neww cars have it my SVT cobra had it, and i think it a lil more then just fuel because we all know that no fuel at 6700 RPM = ******* goodbye to something, it probably cuts fuel/spark and many things to save the moter or something

 

[$inCitySpeed3]

If you go to a bigger turbo you'd be smart to get FMU anyways because the stock computer will not be efficient for the power you want to accomplish

I would get more than a FMU, if there anything like they are for mustangs they are just a bandid, that is aiting to fail you need true ECU management

 

[justa4banger]

Thats even worse, does anyone even use spark cut anymore.

MSD ignitions, mallory, name them. its rev control. Hell on a turbo car, spark cut makes boost on the line. More fuel dumped without spark and the turbo spools up.

I don't see how SPARK cut it worse than Fuel cut.
Fuel cut = lean burns pistons could cause Detonation. etc..........
Spark cut = little more gas out the tail pipe, cat gets alittle hotter(if you have one), backfires alittle(could be bad on a turbo car) BUILDS BOOST ON THE STARTING LINE, so my 4 banger mustang takes off like a V8, without having to be one.

Best thing is to not have to use the damn Rev limiter. its there to protect the motor not for you to bounce the engine off of it. Besides i know people who drive the MS3 have to feel the HUGE fall of power over 6000rpm. hell i shift at 5800-6000 as theres no point in being up in the 6000 + area, theres no power.

 

[justa4banger]

If you go to a bigger turbo you'd be smart to get FMU anyways because the stock computer will not be efficient for the power you want to accomplish

Stock computer will be fine, its the damn injectors that will have to work overtime to keep the a/f ratio in the green.

Besides with Direct injection on these motors i don't think a standard FMU is ready for 1600psi of fuel pressure.

 

[clos561]

MSD ignitions, mallory, name them. its rev control. Hell on a turbo car, spark cut makes boost on the line. More fuel dumped without spark and the turbo spools up.

I don't see how SPARK cut it worse than Fuel cut.
Fuel cut = lean burns pistons could cause Detonation. etc..........
Spark cut = little more gas out the tail pipe, cat gets alittle hotter(if you have one), backfires alittle(could be bad on a turbo car) BUILDS BOOST ON THE STARTING LINE, so my 4 banger mustang takes off like a V8, without having to be one.

Best thing is to not have to use the damn Rev limiter. its there to protect the motor not for you to bounce the engine off of it. Besides i know people who drive the MS3 have to feel the HUGE fall of power over 6000rpm. hell i shift at 5800-6000 as theres no point in being up in the 6000 + area, theres no power.

yea you can definitely feel the power cut after u pass 6k i try to get it right on the 6 and everything usualy turns out fine(burnout)

 

[matsuda]

I don't see how SPARK cut it worse than Fuel cut.
Fuel cut = lean burns pistons could cause Detonation. etc..........

Wrong.
Cutting off the fuel wouldn't result in a lean mixture.