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Old 01-06-2009, 09:45 AM   #1 (permalink)
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Default Installed new intake, now having boost problems

Ok, so I got the intake installed fine but now i'm having trouble setting the boost. I have the line going from the hot piping to the boost controller then the boost controller to the wastegate actuator(like in picture in instructions). I can set it all the way open or closed and it just stays at stock boost. Just out of desperation I tried putting the boost controller on backwards and if I unscrew it all the way it stays at stock but if I tighten it all the way it will spike up high(it went to 12 and was still going but I let off) then one click lower it went to 11 like I wanted then fell back down to 8.5 in 3rd then in 4th went close to 12 then dropped down to around under 7.

Just snapped a quick pic this morning.




I also installed it this way:



Installed as you see in the last pic I could hit whatever psi I want but it would drop back down to 9ish by redline just like before the intake.

For referrence stock boost is 8.5 and I was running 11 dropping to 8.5 with a cone filter. There are people holding 14psi on the same turbo and intake.

Help?
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'05 6-MT RX8 - Stock on 19's
'04 6-MT VR Mazdaspeed Miata -
FM Downpipe-running open downpipe | FM Intake | Boost cut bypass | MBC 11psi | TPS mod | 27x7x2.5 FMIC | Denso Recirc Valve | Falken Azeniz rt615 215/40/17 | Autometer boost gauge | Passport Escort 9500i | removed visors | Supra Injectors waiting to be installed...
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Old 01-06-2009, 10:12 AM   #2 (permalink)
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Now I will not pretend to be any kind of expert on this subject because I barely understand it, but if I understand right you just added the MBC to the system and plumbed it up, right? Wouldn't you have to also open the wastegate up the whole way and then use the MBC to control the pressure?

Or am I completely off base.
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Old 01-06-2009, 10:30 AM   #3 (permalink)
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No, you shouldn't have to do that(not on our cars anyway). There are plenty of people with MSM's boosting using the same setup I am and holding anywhere form 10-14psi. I'll hit 11 but not hold it and fall back to near stock boost. And yes this is posted on a MSM specific site too but it's kinda slow lately :/
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http://i407.photobucket.com/albums/p...MSMNight-1.jpg
'05 6-MT RX8 - Stock on 19's
'04 6-MT VR Mazdaspeed Miata -
FM Downpipe-running open downpipe | FM Intake | Boost cut bypass | MBC 11psi | TPS mod | 27x7x2.5 FMIC | Denso Recirc Valve | Falken Azeniz rt615 215/40/17 | Autometer boost gauge | Passport Escort 9500i | removed visors | Supra Injectors waiting to be installed...
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Old 01-06-2009, 10:40 AM   #4 (permalink)
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Default Re: Installed new intake, now having boost problems

FM directions for MBC on page 4

http://www.flyinmiata.com/support/in...GFB_recirc.pdf
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Old 01-06-2009, 10:52 AM   #5 (permalink)
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Default Re: Installed new intake, now having boost problems

Quote:
Originally Posted by nadrifter @ Tue Jan 06, 2009 11:40 am
Thanks, those are the directions I used for the install. Everything appears to be installed correctly, i'm wondering if my boost controller may not be working properly.
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http://i407.photobucket.com/albums/p...MSMNight-1.jpg
'05 6-MT RX8 - Stock on 19's
'04 6-MT VR Mazdaspeed Miata -
FM Downpipe-running open downpipe | FM Intake | Boost cut bypass | MBC 11psi | TPS mod | 27x7x2.5 FMIC | Denso Recirc Valve | Falken Azeniz rt615 215/40/17 | Autometer boost gauge | Passport Escort 9500i | removed visors | Supra Injectors waiting to be installed...
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Old 01-06-2009, 12:15 PM   #6 (permalink)
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MBC could very well be the issue. Also, have you ensured that the lines that you are using are not leaking air at all? I've seen that issue more than once.
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Old 01-06-2009, 01:03 PM   #7 (permalink)
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Hmm... well I took it apart and there is no spring or ball in it...? Does that make it a bleeder type? Anyway, I know that the small blue T in the 3rd picture can have a spring and ball in it, it doesn't right now. I'll try putting them in, does anyone know where I can get a small short spring and ball that will fit in it?
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http://i407.photobucket.com/albums/p...MSMNight-1.jpg
'05 6-MT RX8 - Stock on 19's
'04 6-MT VR Mazdaspeed Miata -
FM Downpipe-running open downpipe | FM Intake | Boost cut bypass | MBC 11psi | TPS mod | 27x7x2.5 FMIC | Denso Recirc Valve | Falken Azeniz rt615 215/40/17 | Autometer boost gauge | Passport Escort 9500i | removed visors | Supra Injectors waiting to be installed...
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Old 01-06-2009, 07:49 PM   #8 (permalink)
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Got it figured out, thanks for all the advice/input guys!
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http://i407.photobucket.com/albums/p...MSMNight-1.jpg
'05 6-MT RX8 - Stock on 19's
'04 6-MT VR Mazdaspeed Miata -
FM Downpipe-running open downpipe | FM Intake | Boost cut bypass | MBC 11psi | TPS mod | 27x7x2.5 FMIC | Denso Recirc Valve | Falken Azeniz rt615 215/40/17 | Autometer boost gauge | Passport Escort 9500i | removed visors | Supra Injectors waiting to be installed...
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