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Old 09-29-2004, 10:24 AM   #1
waveoff
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2001 Camaro Z28
2003 Aspen WRX Wagon

Default Ditching the UTEC ABC and going back to MBC

I'm ditching the ABC after a week of running around with the base stage 4 map and using the UTEC for boost control. My boost was building way too slow and my turbo seemed to spool down alot between shifts. I read the thread about using an MBC in conjunction with the ABC but I'm stupid and couldn't figure out how to route the lines from the guy's description. Instead, I'm just using an MBC set for 18-19 psi. What a difference! Before, I wasn't reaching full boost until 3600 rpm's in 5th gear when starting from around 1200 rpm's. Now, full boost comes around 3300 rpm's in 5th gear when starting from 1200 rpm's. The turbo seems to stay spooled up better between shifts as well. If I don't get rained out at the dragstrip tonight I'll log some runs and post before and after results here. The car really feels like it should've felt from the get go.
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Old 09-29-2004, 10:47 AM   #2
BurtonCR
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Try using the GM solenoid (search GM solenoid for thread) It works awesome for me and my UTEC. I had the same problem with the ABC.

- chris
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Old 09-29-2004, 11:06 AM   #3
Uncle Scotty
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Your boost gain can also be adjusted to help this issue.
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Old 09-29-2004, 11:16 AM   #4
waveoff
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Default

I just started reading the GM solenoid thread to get more info...thanks for the tip. I read it before when it first came out but lost interest because it didn't really pertain to me at the time. Then I came across this thread http://forums.nasioc.com/forums/showthread.php?t=628636 the other day when searching for info about helper springs and thought it might help me out. I couldn't figure out how to route all the vacuum lines though. That's why I just went with the MBC only. Have you tried your setup compared to an MBC only setup? I want to go with whatever will get me the fastest spool possible. I'm reading the GM thread right now to see how to hook this up and for more info.
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Old 09-29-2004, 04:12 PM   #5
bofh
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Quote:
Originally Posted by waveoff
... I want to go with whatever will get me the fastest spool possible. ...
An MBC with a shot of NOS to spool up the turbo. However, if you want your engine to last more than 1000 miles, you may want to keep the engine management.
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