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Old 01-16-2006, 10:47 AM   #1
Boxer112
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Default AP and Boost Controller

is it safe to run a Manual Boost Controller and Cobb AP?? I wont be turning up the boost like mad, but i will turn it down for emissions. Help Me out guys.
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Old 01-16-2006, 11:25 AM   #2
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Quote:
Originally Posted by Boxer112
is it safe to run a Manual Boost Controller and Cobb AP?? I wont be turning up the boost like mad, but i will turn it down for emissions. Help Me out guys.
Why??
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Old 01-16-2006, 11:59 AM   #3
Boxer112
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im just wondering is it safe??turn it down when street driving, and when spirited driving, turn it up
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Old 01-16-2006, 12:40 PM   #4
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Turning it down won't help emissions - the AP will still be fueling the same amount, and when you turn it down, it will just be rich.

Why not USE the ability of the AP's realtime maps and switch maps with it. That way you get approproate fueling for nboth low boost and high boost modes of operation.
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Old 01-16-2006, 01:51 PM   #5
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Quote:
Originally Posted by mcowger
Turning it down won't help emissions - the AP will still be fueling the same amount, and when you turn it down, it will just be rich.

Why not USE the ability of the AP's realtime maps and switch maps with it. That way you get approproate fueling for nboth low boost and high boost modes of operation.

the ap's fueling is based on MAFv/load, so if you turn down boost with an am BC, you'll just hit lower targets in the OLF map. you won't fuel too much. Now, since the BCS is not in control any more, it will be working like mad with WGDC's to try and hit target boost. . .but that's about it.

To answer the OP's original question, there's nothing wrong per se with using a BC with the AP. I don't see it helping with emissions (i don't believe you're even in boost when emissions testing), but it can def help in gas conserving situations. I personally don't like the idea of the econo maps, they use low boost but also advanced timing, so if you have to get on it in a hurry you could det.

Given you have means to monitor your boost levels, and the wherewithall to mess with your BC, go for it!

Edit: one word of caution, when using an AM BC your stock BCS and ecu is not longer in control of boost, so if you get into a highboost/high det situation, your ecu cannot cut boost, you'll just keep boosting. This means be careful, don't run tons of boost, and monitor EGT's if possible. Watch for CEL's, and as soon as you get one scan it. If you get any WG out of range CEL's turn down your boost etc.

Last edited by hondaeater69; 01-16-2006 at 01:58 PM.
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Old 01-16-2006, 02:02 PM   #6
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hondaeater, thanks..
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Old 01-17-2006, 12:25 AM   #7
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I had the same thought as Boxer112; I want to to be able to increase/decrease performance(boost) as needed INSTANTLY. I dont want to pull over, attach the AP, change the map, disconnect the AP, etc. I know the utec can do this with a dash mounted switch...is there any way to do the same with the AP?

My goal is to improve milage...I drive about 70 miles/day and avg about 23mpg on premium. My wrx wagon is stage 2 with full 3"TBE.
TIA

Last edited by 1modh; 01-17-2006 at 12:35 AM. Reason: milage
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Old 01-17-2006, 02:08 AM   #8
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Best way to improve mileagle is not to adjust your boost. Its to stay out of open loop altogether, and the way to do THAT (short of tuning the transition points yourself) is to lay off the gas pedal.
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Old 01-17-2006, 02:28 AM   #9
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Quote:
Originally Posted by mcowger
Best way to improve mileage is not to adjust your boost. Its to stay out of open loop altogether, and the way to do THAT (short of tuning the transition points yourself) is to lay off the gas pedal.
I agree with you about staying out of boost; my factory boost guage usually shows ZERO boost most of the time, except under hard acceleration. I usually short shift (about 2500rpm); on the highway i usually stay in 5th at about 80(+/-10)mph
Could I running too rich? What knid of MPG should I expect?

TIA
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Old 01-17-2006, 03:01 AM   #10
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my buddy has a unichip tuned to 17psi and he turns his boost up and down as he pleases but i dont know if its safe. he has even had it up to 20psi and all he has is intake and tbe. but 1modh his gas milage is pretty good even when he is beating it to hell.
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Old 01-17-2006, 03:11 AM   #11
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this may be a stupid question, but would it be a good idea to use a boost controller to raise boost to 16psi on stage 2 AP? Cuz my boost at stage 2 right now is only 15ish.
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Old 01-17-2006, 03:12 AM   #12
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Best boost controller ever: Your right foot.

Emissions? BC won't affect that one bit.
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Old 01-17-2006, 03:13 AM   #13
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Quote:
Originally Posted by chopstix
this may be a stupid question, but would it be a good idea to use a boost controller to raise boost to 16psi on stage 2 AP? Cuz my boost at stage 2 right now is only 15ish.
Is that read on a gauge or the AP? Not all gauges are deadly accurate.
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Old 01-17-2006, 03:14 AM   #14
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Quote:
Originally Posted by 02WHITEDUB
Is that read on a gauge or the AP? Not all gauges are deadly accurate.
both, im reading close to 15psi on AP and my gauge
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Old 01-17-2006, 03:18 AM   #15
02WHITEDUB
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Quote:
Originally Posted by chopstix
both, im reading close to 15psi on AP and my gauge
Hmmmmm...
Have you tried the Vishnu reset?
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Old 01-17-2006, 05:27 AM   #16
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i ran a mbc with mine (ap stage II) for about 5k miles. and no problems whatso ever. boost response was better and no more boost wavering that was driving me nuts!!! bu when i return from iraq though i will upgrading to the shiny ej5-40t, pinks, fuelpump and large tmic sitin in the garage..
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Old 01-17-2006, 10:17 AM   #17
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Quote:
Originally Posted by chopstix
both, im reading close to 15psi on AP and my gauge
You should adjust the wastegate actuator.

The Vishnu reset pushes the advance multiplier forward, and gives you maximum timing. It has nothing to do with boost targets.


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