HALLMAN MBC question
Sep 1, 2007, 05:39 AM
#6
I'm having the same issue.. my hallman MBC is turned up all the way also... and it only peaked at 20psi on 4th-6th gear. around 18-19psi 1st-3rd. I know to solve the problem is to replace the soft spring with the hard spring.. I was wondering if there's a place where i can buy the harder spring, since i accidently mis-placed somewhere. if anyone can help me out so I can get my car re-tuned at a higher boost. I want to boost atleast 23-25psi...
Alright I hooked up my MBC to the wastegate line and tapped off the BOV, I can only lower the boost and when I turn it all the way up its the same when it was stock. I read that you should disconect the battery but its late and my alarm goes off if I do that so tomorrow I'll try that.
The max boost I have is 19-20psi with it turned all the way up. I have the soft spring in it right now.
Any useful suggestions are apriciated.
The max boost I have is 19-20psi with it turned all the way up. I have the soft spring in it right now.
Any useful suggestions are apriciated.
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Sep 1, 2007, 06:48 AM
#8
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The light spring should work fine for 23-25 PSI. I have had no issues with mine. Not to sound like a jerk but ...is it hooked up correctly? Did you bypass the boost control solenoid when installing like Hallman recommends?
Sep 1, 2007, 06:50 AM
#9
Sep 1, 2007, 07:27 AM
#12
Yes it is hooked-up correctly, I followed the instructions from hallman, and one of the thread from EVOM. I changed all the stock vaccum hoses to make sure there's no restrictor. but still same results. MBC is turned all the way up, and its only peaking 20psi.... I might just try to get the heavy spring to see any difference before i go out and buy a new one....
Sep 1, 2007, 08:51 AM
#13
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It was worth a shot...sometimes it the simple stuff we overlook. Wonder if my boost controller came with the heavy spring already installed. I didn't request it but stranger things than that have happened to me.
Yes it is hooked-up correctly, I followed the instructions from hallman, and one of the thread from EVOM. I changed all the stock vaccum hoses to make sure there's no restrictor. but still same results. MBC is turned all the way up, and its only peaking 20psi.... I might just try to get the heavy spring to see any difference before i go out and buy a new one....
Sep 5, 2007, 11:35 AM
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This is weird, because i have the FORGE MBC and it came with the hard spring and soft spring. With the soft spring in, i can only boost to 20psi. Whats weird is that when i put the hard spring in, it spikes to 30psi, then holds at about 26. Thats overboosting, and i took it out immediately. I have no clue why this happens.
Sep 5, 2007, 11:58 AM
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This is weird, because i have the FORGE MBC and it came with the hard spring and soft spring. With the soft spring in, i can only boost to 20psi. Whats weird is that when i put the hard spring in, it spikes to 30psi, then holds at about 26. Thats overboosting, and i took it out immediately. I have no clue why this happens.