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Old 09-17-2005, 11:20 PM   #1
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Default For all you guys that have done the 'boost bypass' trick:

And those that have, that are also running stock PCM'*:

What do you think will happen when the PCM reaches it'* fuel cutoff rpm, and your PCM can't dump boost?
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Old 09-17-2005, 11:52 PM   #2
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<--- =engine
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Old 09-18-2005, 12:03 AM   #3
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We have a winner.

I never did it to the 93, as the Jet bumped my fuel cutoff out of range, and deleted the overboost protection code.

Don and I figured this out on the phone today. Talking about another member'* car. I won't be doing it to the 95.
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Old 09-18-2005, 12:18 AM   #4
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I was thinking about doing this also. Good thing I read this post!!!!!!!
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Old 09-18-2005, 11:01 AM   #5
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I thought about it before, but figured.. daily driver doesn't need that much

Sorry to hear whoever did it.

(If it'* S2..wanna sell the supercharger?)
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Old 09-18-2005, 11:16 AM   #6
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Don and I were just theorizing about the other member'* car. This probably wasn't the cause of that damage. But it was discussed and discovered to be a possibility during the conversation.

The point is that my redline on the 95 is 6000 rpm'*, but I hit fuel cutoff at 5600. If the PCM can't dump boost before 5600, I stand a very good chance of grenading. It'* a good idea to make sure your BCS is in good working order. Sometimes damage is cumulative, and may not be apparent until weeks or months later.
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Old 09-18-2005, 02:03 PM   #7
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What if your chip doesn't delete overboost protection and you have the peace of mind to let off a little in the upper range to let it shift under less power?
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Old 09-19-2005, 11:19 PM   #8
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so what your saying is the Boost control mod i did..is potentially dangerous?
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Old 09-19-2005, 11:26 PM   #9
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John, just don't get carried away.

Matt, yes, it is potentially dangerous. This has been overlooked by all of us for quite some time. If the PCM can't dump boost before fuel cutoff, it COULD be nasty.

My suggestion is to put it back to stock (this is the vacuum line swap we're talking about, not the BCA 'loosen and turn'). You won't need it anyway if you Jet. The Jet pushes the fuel cutoff farther out of reach and deletes overboost protection.
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Old 09-19-2005, 11:44 PM   #10
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so those of us who did the loosen and tighten arnt in the redline for the grenading? I have a PCM from intense sitting in the basement waiting to be installed but i dont want the engine going boom.
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