Boost Gauge Interpetation
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From: Hat Creek Ca
Yes, a clogged air filter or insufficient capacity of the intake to move air ( read throttle plate ) creates a pressure differential between atmospheric pressure and the intake manifold. Lower "pressure" in the intake manifold in a diesel = no bueno
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[QUOTE=Tugly;13088578]That fits with what I was thinking. An external boost gauge is free from the bondage of the rules of the Ford MAP sensor. The turbo blows air at idle, but I don't know if it's as much as the engine sucks. A restricted air filter could further reduce the turbo's ability to supply air so low on the turbo's operation envelope.[/QUOTE)
I installed a new 6673 filter about 3 months ago about 2,000 miles. I'm using one Pete's covers. Could this cover be causing the restriction? I guess I should remove it and see if the readings change. Should I then drill and tap the spider to get my reading for boost there?
Jeff
I installed a new 6673 filter about 3 months ago about 2,000 miles. I'm using one Pete's covers. Could this cover be causing the restriction? I guess I should remove it and see if the readings change. Should I then drill and tap the spider to get my reading for boost there?
Jeff
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Joined: Jun 2003
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From: Damon (South East Texas)
[QUOTE=koski19;13088747]
I am thinking of taking this one step further and removing my air filter see if the reading changes. I have a good feeling it won't and the negative reading is more likely to follow Cody's explanation of how the calculation is made.
That fits with what I was thinking. An external boost gauge is free from the bondage of the rules of the Ford MAP sensor. The turbo blows air at idle, but I don't know if it's as much as the engine sucks. A restricted air filter could further reduce the turbo's ability to supply air so low on the turbo's operation envelope.[/QUOTE)
I installed a new 6673 filter about 3 months ago about 2,000 miles. I'm using one Pete's covers. Could this cover be causing the restriction? I guess I should remove it and see if the readings change. Should I then drill and tap the spider to get my reading for boost there?
Jeff
I installed a new 6673 filter about 3 months ago about 2,000 miles. I'm using one Pete's covers. Could this cover be causing the restriction? I guess I should remove it and see if the readings change. Should I then drill and tap the spider to get my reading for boost there?
Jeff
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Joined: Jan 2011
Posts: 18,849
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From: Puget Sound
[quote=mueckster;13088804]
I can't disagree with this, as I'm spit-balling here.
koski19 - that cover idea would be a good test. As for the installation of the boost sensor on the spider - that is ideal when tuning and modding. When you up the performance, you can eventually crowd the limits of the turbo and you want to know when you're there. Stock turbo and sticks (sensor on spider):
koski19 - that cover idea would be a good test. As for the installation of the boost sensor on the spider - that is ideal when tuning and modding. When you up the performance, you can eventually crowd the limits of the turbo and you want to know when you're there. Stock turbo and sticks (sensor on spider):
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[QUOTE=Tugly;13089201]
I can't disagree with this, as I'm spit-balling here.
koski19 - that cover idea would be a good test. As for the installation of the boost sensor on the spider - that is ideal when tuning and modding. When you up the performance, you can eventually crowd the limits of the turbo and you want to know when you're there. Stock turbo and sticks (sensor on spider):
I'll try that tomorrow and then drill and tap the spider. I need to remove the turbo for pedestal leak. I'm unable to post photos..not allowed to. Thanks for your help.
Jeff
I can't disagree with this, as I'm spit-balling here.
koski19 - that cover idea would be a good test. As for the installation of the boost sensor on the spider - that is ideal when tuning and modding. When you up the performance, you can eventually crowd the limits of the turbo and you want to know when you're there. Stock turbo and sticks (sensor on spider):
Jeff
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Joined: Jun 2003
Posts: 8,298
Likes: 24
From: Damon (South East Texas)
I took a couple of videos of my Aeroforce Interceptor gauge while reading the boost at idle, with and without the air filter in place.
Boost Reading @ Idle (filter In Place) Video by mueckster | Photobucket
Boost Reading @ Idle (filter Removed) Video by mueckster | Photobucket
I have the AFE Stage 2 Filter with Pete's Cover (in my signature). No real difference at all between the two.
Boost Reading @ Idle (filter In Place) Video by mueckster | Photobucket
Boost Reading @ Idle (filter Removed) Video by mueckster | Photobucket
I have the AFE Stage 2 Filter with Pete's Cover (in my signature). No real difference at all between the two.
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