OK i finnally got the TurboXS ABC or auxilary boost controller installed on my ms3. the install was a snap and now i hit 15 psi in first and 16psi in 2nd and 16-17 psi in 3rd-6th. The great thing about the ABC is that its not an MBC. the ABC works with your factory boost control system so the ecu can still pull boost if it needs too. Notice it only has one boost input, and the other end just T's into the vacum line between the oem wastegate and the FBC. WOW the car feels nice with full boost in 1st and 2nd and the rest of the gears pull harder too! (drinks)
Success! MS3 boost control
- Thread starter nig3
- Start date
azmavhockey3
Member
DYNO proven? I would like to see some numbers.... easy for me to say eh? haha
Not sure if any other company besides TXS makes a boost controller like this one. I was hoping this mod would help smooth out the boost so it wouldnt spike like the factory system. but the spike in 3rd threw 6th is still there, but i guess thats fine cause it was doing it before the ABC was installed. when i hit third it will jump up to 20+psi for a second then hold steady 16psi till redline. i will try turning up the boost to 17-18psi soon but i think i will just wait untill i get my DP installed and im on a dyno so that i can watch the AFR's to make sure everything is cool. but for now, having full boost in 1st and 2nd and a steady 16psi in all the rest is a huge improvement over stock!
desperado-c
Member
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- Mazdaspeed3
Yeah, they don't show any auxillary boost controller except one for use with UTEC. Splain, pleez. Also, is it doing something that shows it is allowing the ECU to cut boost, ie., working differently than an MBC?
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yeah txs doesnt list it for sale because they usually only come with the utecs. i would hit up nasioc.com forsale section cause there are suby owners selling them all the time. got mine for $18 shipped!! its different than an mbc cause it works with the FBC. they FBC still has control but with the the abc you can bleed off a set about of boost pressure in the vacum line alowing the turbo to make more boost without the FBC knowing about it. The best thing about this is not only does it alow u to control boost pressure but if there is a problem the FBC can still overide the abc and pull boost, it just has to try alittle harder hahaha.
SharkDiver
Member
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- Speed3
I found them here for $35... http://subaruproparts.com/product_info.php?products_id=698&osCsid=4a7d08a772b04439fd0388282bee02c4
mazdaspeed32007
Member
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- Mazdaspeed3
watch out with your boost spikes you can cause some serious damage if done again and again. you should be better once you get your DP installed then youlll get more air flow and the spike will settle down and you wont have to worry about burning your turbo to s***.
this is going to be a very temporary fix ! if you leave the stock boost contrller hooked up, it will jump in and take control back. if the car sees it has more boost than usual, the stock boost controller can and will undo your extra power........been there done that ! if you want boost control, you need to remove the hose that connects the WGA to the factory BC. if you leavr that hooked up.....its all a wash !
thats weird.... im still hitting 15-16psi in 1st and 2nd and its been a couple weeks , If what you say is fact then why hasent the FBC corrected that???
mazdaspeed32007
Member
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- Mazdaspeed3
your the .1 exception in the "99.9 percent case". you may experience light headed-ness, nausea, stomach bleeding, or even death. contact your physician if any of these symptoms arise or become worse over time. esp. death.
No, the ECU/FBC cannot "pull boost". The ECU can only increase the boost pressure by opening the solenoid valve.
Basically what you are doing is increasing the minimum boost pressure which is normally set by the wastegate actuator when the solenoid valve is closed.
desperado-c
Member
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- Mazdaspeed3
And, in terms of performance and long term engine reliability, this means ...? Please enlighten us Matsuda-san.
Here's some info about the operation of the wastegate solenoid cited by a poster on Mazda 6 Club. How does it fit in?
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yeah all that stuff still applies with the abc setup, thats why im using that instead of the mbc. the % of air you bleed off with the abc just raises the boost % and can still fluctuate with these different conditions. So long term engine reliabilty is most likely better with the ABC over the MBC until a nice reflash is availble to up the boost some. Im getting dynoed tomoorow ,i think? and i will show you how the AFR's are probabaly fine even with the couple extra psi of boost.
