Guys I Really need your help
#1
Guys I Really need your help
I tried searching and was unsuccessful. I cant get my MBC to work. I have a 90 miata with a greddy kit with a starion FMIC and greddy downpipe with a test pipe and a catback. I cant even boost 5 psi on the stock waste gate. The most i've ever boosted is 3-4 psi. So i figured I should add a manual boost controller to boost a consistent 5 psi atleast. Anyways, I have it mounted just like this picture
http://www.geocities.com/chmwatson/F...cschematic.jpg
My question is, I have the wastegate actuators line coming to the MBC and I need to know, what happens with the spot the other end of it used to be at. by the turbo area. I tried it and my car boosts about 3 psi with the MBC tightened all the way and open all the way. Any help ?
http://www.geocities.com/chmwatson/F...cschematic.jpg
My question is, I have the wastegate actuators line coming to the MBC and I need to know, what happens with the spot the other end of it used to be at. by the turbo area. I tried it and my car boosts about 3 psi with the MBC tightened all the way and open all the way. Any help ?
#13
well im sure its not the gauge because if my boost gauge is open all the way it means i should be boosting well over 10 psi. And im not going over 3psi. And im sure I'd be able to tell the difference in pull between 10 psi and 3psi. And on a side note, right now i went on the freeway and in 3rd and 4th gear i was hitting 5 psi holding till redline. But i wouldnt hit 5 psi until over 5K rpms. Its like an insane LAG. I boost 1-2 psi up until 4k then after that on the freeway 3rd-5th gears boost 5 psi.
#14
I had the same problem. When I installed the kit it was maxing at 3.5- 4 psi. I got a voodoo MBC and hooked it between the nipple on wastegate actuator and the vacume on the intake manifold. The diagram you showed will work but might cause some boost spike. Other then that i would try another gauge.
#20
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
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ok.
Do this.
Connect the MBC to the Compressor fitting. So the bottom leg of MBC goes towards the compressor and the side legs goes towards the wastgate.
Keep the BOV vacuum line out of the equation, make sure it's leak free and connected straight to your source.
MBC is on the lowest boost setting when turned fully counterclockwise. The tighter you tighten down the MBC the higher the boost will go.
Also verify that your wastgate actuator rod is fairly tight.
see attached:
Do this.
Connect the MBC to the Compressor fitting. So the bottom leg of MBC goes towards the compressor and the side legs goes towards the wastgate.
Keep the BOV vacuum line out of the equation, make sure it's leak free and connected straight to your source.
MBC is on the lowest boost setting when turned fully counterclockwise. The tighter you tighten down the MBC the higher the boost will go.
Also verify that your wastgate actuator rod is fairly tight.
see attached:
Last edited by Braineack; 10-02-2007 at 03:01 PM.