I have full boost in second and don't know why.

[Mid_Life_Crisis]

Mods are:
MSCAI installed as short ram - no airflow straightener yet.
Prototype Forge BPV.
Prosport Electronic boost gauge.
No mods that should affect boost control or levels other than the BPV making it more consistent.

First gear hits about 12 PSI.
Second -> fourth hits 16 then settles to 15.
I have not gotten into fifth or sixth under full throttle since I noticed this.
Also, the traction control seems to be letting me know my tires are spinning but not doing anything about it. Second gear is just spin until I let up on the gas.
Any ideas as to what the heck is going on?

 

[mazdaspeedster3]

You are only hitting 16 PSI? Maybe your guage is off. DH says I hit 18 or higher at times and level at 15.5.

 

[Mid_Life_Crisis]

You are only hitting 16 PSI? Maybe your guage is off. DH says I hit 18 or higher at times and level at 15.5.

You're getting full boost in second also?
I'm pretty sure that the factory target is just under fifteen, which means I'm getting pretty remarkably tight control right now, which I like. I'll see what happens when I get around to upping the boost (just a couple of pounds, I'm not greedy).
I used to hit much higher on peaks, but the new BPV seems to have smoothed that out. I just swapped out the valve (from a rougher prototype) to this one, so I don't have much driving time with this setup yet. I'm going to do some back road blasting this weekend and see what I get.

 

[Mid_Life_Crisis]

It's my understanding that boost in first gear is dramatically limited and second gear is also limited, but less so. Is this not correct?
If this is correct, nobody out there has a theory as to what could be causing my car to get full boost in second?
Possibly more important, no thoughts on the traction control issue? Could they be related?

 

[DaleNixon]

Is this all at WOT?

 

[Mid_Life_Crisis]

Wide open throttle for the boost levels, but the traction control weirdness is even at part throttle. The squiggly tire tracks on the dash light up, but the tires keep spinning unless I back off the gas. Of course, trying to feather the throttle on a front wheel drive to control wheelspin just ends up in brutal wheelhop. I am so going to get one of those transmission mounts.

 

[spdjnke]

nope its all normal, the initial releasesd model back in 07 had more of a steering angle boost leak, where the newer models do not, my 08.5 is doing the same thing and I don't have any qualms about it, thus my traction control light has NEVER come on before even with spinning tires, its really strange. Maybe they just said that there is traction control on these cars for you to buy one cuz mine hasn't worked yet especially when it's raining.

My TL used to pulse the brakes and you can feel the power reduction but MS3 definately not.

 

[DaleNixon]

I've only seen DSC kick in when accelerating hard over rough terrain.

 

[mr_mazda329]

I've only seen DSC kick in when accelerating hard over rough terrain.

I've seen it kick in, in 3rd Gear on cold nights.

 

[Mid_Life_Crisis]

I've felt it cut the throttle when the wheels were spinning before. It just doesn't do it anymore. I still have limiting when starting out with the wheels turned, like turning onto a main road from a side steet with a stop sign. It just seems to let the tires spin to their little hearts content when I take off in a straight line.
If they reduced the boost cut for the newer models, is it possible that they did away with the second gear boost limit? I had the pump upgrade and the reflash to go with a few months ago. Is it possible that this change occurred then and I just didn't realize it until now? I'm testing a new BPV so I'm paying extra attention to the boost gauge. I suppose I just never realized the second gear boost level changed, but you'ld think I would have noticed the tire spinning thing.

 

[DaleNixon]

s*** I guess I'm afraid to do a real launch. I guess one of these days I need to rev it up to 4k and just drop the clutch like it's hot.

 

[Mid_Life_Crisis]

s*** I guess I'm afraid to do a real launch. I guess one of these days I need to rev it up to 4k and just drop the clutch like it's hot.

I never launch higher than 3 grand. I have to feather the clutch to launch that high, and ease into the gas as the car starts rolling. Otherwise my 235 Azenis just burn up.

 

[eg6motion]

I never launch higher than 3 grand. I have to feather the clutch to launch that high, and ease into the gas as the car starts rolling. Otherwise my 235 Azenis just burn up.

the ms3 traction control is more like burnout control...it lets the tires slip, but not spin very hard. If feel compelled to test it, just rev it and drop the clutch and feel the car fall flat on its face after a quick chirp...those who drive in rain or snow should def recognize it functioning.

 

[Conso]

i hav full boost all the time and i love it =P

 

[squidmotion]

turned all the jazz off on mine the other night, before turning onto an asphalt road... stopped, and let the clutch out kind of quick, not really launching it....and man, does it absolutely ROAST the tires... unlike other front wheel drivers i have been in that have a bit of power, and try to rip the wheel from your hands (yuck), this felt totally cool with the LSD doing it's thing, though on concrete it would be a different story, i bet.

very fun in second gear, the turbo spooling up and breaking the tires loose, mid gear! zoom zoom! it feels like a different car, those first two gears... who needs full boost, when it just blows the tires in first anyway?

gauranteed to put a smile on your face! and all under the posted limit... hehehe

i can see why the TCS was a must on this car... it sure makes it nice and tame in the wet conditions!

 

[LukeP]

Having a great deal of experience driving the MS3 on sheet ice (outside it is a total wasteland right now), I can report that the TCS system will allow a percentage of wheelspin before the TCS cuts the throttle.

It seems to let the tires spin about 500-1000 rpm above before reducing throttle. It's also totally inconsistent, depending I think on how the sensors read the situation. I've driven down some icy roads where I'm not accelerating and the TCS light will blink.

Also, if I tip the throttle in when the TCS light is blinking, it will let the RPMS jump, then it will close the throttle, then it will let the rpms jump again, then reduce throttle. All this with the foot deep in.

So yeah, its more like traction suggestion, which is nice because you can still scrub the tires on a hard launch without having to fear about completely roasting them. Although with TCS off on dry roads, I notice a 95% reduction in wheel hop - could be because, like another poster said, it's the lift-off that causes it, and with TCS off, the car doesnt lift for me.

I also notice then when the MS3 is having in a particularily good boost mood, it will spin to 6000 rpm in second gear and the car will "catch up" to the spinning tires without the TCS light going off. Other times the car feels flat, with no explanation and doesn't juice the fronts enough to break loose.