I just disconnected the BOV line to the gauges and hooked it up to my air compresser..I ran the tank down to 25-20-15-10 and basically the gauge is spot on at all points with the pressure in the tank..I also checked for leaks at the back of the gauge and other fittings and connections.. No leaks..I only get 10-12 psi in most gears ,,3rd,4th 5th 6th..This seems low but the car seems to pull like it always has from new. spikes to 16-17 on the hwy every time, settles to 11-12.5ish then drops off from there in the upper rpms..atleast is not the gauge.. ...anyone have any input? I notice the chip from austalia said they increased power from increasing boost from 13 to 16.. I though ms3 had 15.7lbs max boost..after second? I might loose a pound or two from pressure drop through the intercooler but that would put me a like 13/14 at the turbo. Seem like most ms6 owners are seeing 15-16 at the Bov with there boost gauges...What kind of pressure are everyone else seeing..?(bang)
What kind of Boost Levels are MS3 owners seeing?
- Thread starter redms3gt
- Start date
MBC will work on any wastgate controlled turbo car.. Only fools the wastgate into opening later allowing more boost..This thing spins bad in first and second for me. More boost would be bad.. I was thinking someone could unhook the pressure line off the turbo and run it to the Bov.. That would make the ecu try to maintain the same boost as stock plus any inefficiency lost though the intercooler. Would probable give a psi or two? spike would be worse as the signal to the wastegate to open would take longer to reach it. The ms6 guys seem to run 17 with no problems but that does not mean we are the same. I want someone else to try first.. If cobb come out with a fix we would get more boost and could still maintain some of the factory limiting..the pod is off of ebay.The problem with is the factory solenoid controls how much boost the turbo is able to produce and if there is any knock from bad gas/high temps/etc the Ecu can back it off the save itself,but many, many people run MBC's or wastegates set to certain mechanical "non ecu controlled"llevel without any problems.
..Its fits pretty good but need sanding and cutting to get it decent..Gotta hack of the center peice pretty bad..
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I also notice in 3rrd and above that when rolling on at any speed boost stays about 10-11psi..We I say roll on I mean slow enough there is no spike at all.. If I punch it boost spikes to 15-17 depending to gear and settles to 11-12.5 depending on gear.. this is weird. The car is definitely faster feeling 1st,2,3,4,5 than just smoothy rolling on in third,etc....This loss of power issure seems to be widespread..
Aaron@Realtune
Member
Have you thought about using a TXS DtecBC?
You would have full controll over boost per gear AND per RPM.
Example
gear 1- 8 psi
gear 2- 10psi
gear 3- 17psi and than in higher RPM ranges where the boost would drop, you can open the EBCs solenoid more to keep the boost level steady
gear 4 - Repeat and so on. Most likely gear 4 would need less duty cycle than gear 3.
This device can also be used to spool the turbo faster if need be and can help with smaller turbos PTB.
Now keep in mind the computer wouldnt be controlling boost anymore. The EBC would. You would also NEED to check the a/f before making big changes like holding 5-7psi more to redline.
Also you can NOT turn the boost down lower than what the WGA would give you without computer controlled boost.
Anyone know what the boost levels would be if you just ran the WGA to a boost source?
You would have full controll over boost per gear AND per RPM.
Example
gear 1- 8 psi
gear 2- 10psi
gear 3- 17psi and than in higher RPM ranges where the boost would drop, you can open the EBCs solenoid more to keep the boost level steady
gear 4 - Repeat and so on. Most likely gear 4 would need less duty cycle than gear 3.
This device can also be used to spool the turbo faster if need be and can help with smaller turbos PTB.
Now keep in mind the computer wouldnt be controlling boost anymore. The EBC would. You would also NEED to check the a/f before making big changes like holding 5-7psi more to redline.
Also you can NOT turn the boost down lower than what the WGA would give you without computer controlled boost.
Anyone know what the boost levels would be if you just ran the WGA to a boost source?
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zoom-zoomhatch
Member
- :
- Cosmic Blue MS3
It could be very possibly that the wastegate just like in the srt is weak and won't hold that much boost through the gear. I'm not sure where you would find the specs but maybe the wastegate has a 11lb. spring in it allowing it to open after it hits that mark so you feel 16 psi for a second then it begins to fall off.
Aaron@Realtune
Member
zoom-zoomhatch said:
As with the SRT, Its not just the weak WGA[4psi]. Its the poor manifold design and small turbo size.
Im willing to bet the WGA is a big part of the problem with the MS vehicles and that the size of the turbo is the rest of the issue. Very easily fixed either way you look at it
zoom-zoomhatch
Member
- :
- Cosmic Blue MS3
I'm not so bothered with the small turbo, I actually wouldn't mind if someone produced an upgrade for this turbo. The lack of spool time is nice, but to fix the wastegate and be able to hold that power to redline would be nice.
I would guess the wategate by itself is likely very low cause in first it can pull basically all boost if it want to and u are turning also...the wastegate has two nipples on it. On on top/and one one bottom..bottom runs directly to turbo..top runs to soilenoid I beleive. I think the computer limits throttle to 80% after 6k so thats part of the reason boost drops off so fast...
Aaron@Realtune
Member
matsuda said:
Thats what I thought.
Can someone take a picture of the WGA for me?
So there are no WGA upgrades for the MS3 yet? Thats insane
Aaron@Realtune
Member
Thanks for the pics, but I was hoping someone had a clear shot or have it out of the car?
