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Old 04-28-2004, 02:37 AM   #1
Rex Ruther
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Cool Did the MBC with Cobb Stage 2 91 octane Accessport

It almost seems like sacrilege, but it is a pleasant surprise in the 0-60 range with the lower gears. I only road tuned it with the Accessport boost display to be about 1 pound over max boost in 4th without the MBC. Haven't noticed decreased drivability issues or thrown a DTC or CEL. It is running about 2 pounds higher in 1st 2nd and 3rd and a worthwhile trade off in safety from my ignorant point of view. Worst case scenario and I get to by a new turbo, engine, or tranny.
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Old 04-28-2004, 04:41 PM   #2
mexicanpizza
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Quote:
Originally posted by Rex Ruther
Worst case scenario and I get to by a new turbo, engine, or tranny.
...for 15-25hp. Is it worth it?

Same issues apply for a stock car + MBC. Watch PTFB.
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Old 04-28-2004, 05:42 PM   #3
Equilibrium Tuning
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PTFB is the main thing to watch out for. Although the reflash runs more boost at part throttle than the stocker, an MBC will still give you a lot more boost at lower throttle position than the reflash. Also listen for pinging, although with 93 octane, I doubt it will be an issue.

-- Ed
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Old 04-28-2004, 10:04 PM   #4
Rex Ruther
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Quote:
Originally posted by mexicanpizza
...for 15-25hp. Is it worth it?

Same issues apply for a stock car + MBC. Watch PTFB.
I need an excuse to get deeper into this project.
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Old 04-30-2004, 08:42 PM   #5
abqkid
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total newb q here......what is PTFB?
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Old 04-30-2004, 08:50 PM   #6
03WRXMA
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Quote:
Originally posted by abqkid
total newb q here......what is PTFB?
Partial Throttle Full Boost


Basically too much boost from the MBC, without enough fuel to compensate for it.
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Old 04-30-2004, 10:29 PM   #7
abqkid
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alright thanks. can you see ptfb with a reflash or not since boost is now intergrated with fuel as opposed to just a MBC?
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Old 05-01-2004, 02:06 AM   #8
Rex Ruther
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Originally posted by abqkid
alright thanks. can you see ptfb with a reflash or not since boost is now intergrated with fuel as opposed to just a MBC?
With the Accessport, you can see the boost the ECM sees in real time. I have not hit full boost at partial throttle, FWIW.
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