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will a car boost with stock map sensor in it?!

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Old 10-08-2010, 01:16 AM
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Default will a car boost with stock map sensor in it?!

im driving around breakin in my motor and jus wondering if itll see 1 psi with that or if i need my 3bar in?
Old 10-08-2010, 01:25 AM
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with the stock map sensor you can apply boost to the motor just wouldnt go more than 7-9psi before going to a 2bar or higher map sensor so it can be tuned correctly for it.
Old 10-08-2010, 02:25 AM
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Lol it has no choice but to boost. Now if the comouter knows it or not is a different story lol.
Old 10-08-2010, 06:03 AM
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Originally Posted by blk00ss
Lol it has no choice but to boost. Now if the comouter knows it or not is a different story lol.
this, lol
Old 10-08-2010, 06:18 PM
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Originally Posted by blk00ss
Lol it has no choice but to boost. Now if the comouter knows it or not is a different story lol.
It'll "boost" the same, it's just that if you run out of MAF, the computer will not know how to fuel and you could go lean
Old 10-08-2010, 11:18 PM
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I am thinking it depends if you still have your MAF hooked up. Is this what you're asking? If you don't have your MAF hooked up, and you are just on your MAP sensor, it will not boost.

Someone correct me if I'm wrong. This is what my friends Procharged car did.
Old 10-09-2010, 03:17 AM
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So you're saying that with no maf hooked up and on a 1 bar speed density the car will not make any boost? Riddle me this, where does the boost magically go?
Old 10-09-2010, 04:18 AM
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What my friends car did, was when he would get on it, it would go up in vacuum till it hit pretty much 0 psi, and then it would sound like a 2 step would, and not break 0 psi of boost, because he wasn't tuned for anything positive pressure.

So to answer your question, its not "Where does the boost magically go?" You MIGHT break 0 psi, but after that your engine will stall because you're not tuned to operate there, thus you will have no exhaust energy, thus stop spinning the turbo, thus no boost pressure.

Make sense?

Last edited by 93camaro_zzz; 10-09-2010 at 04:36 AM.
Old 10-09-2010, 01:57 PM
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It will boost but the fueling and timing will be way off. Go 2 bar.
Old 10-09-2010, 02:29 PM
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Originally Posted by 93camaro_zzz
What my friends car did, was when he would get on it, it would go up in vacuum till it hit pretty much 0 psi, and then it would sound like a 2 step would, and not break 0 psi of boost, because he wasn't tuned for anything positive pressure.

So to answer your question, its not "Where does the boost magically go?" You MIGHT break 0 psi, but after that your engine will stall because you're not tuned to operate there, thus you will have no exhaust energy, thus stop spinning the turbo, thus no boost pressure.

Make sense?

Rofl
Old 10-09-2010, 11:52 PM
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Epic thread is epic.
Old 10-10-2010, 12:13 AM
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Watch out or the boost will ninja it's way into the motor!!!!
Old 10-10-2010, 01:25 PM
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subscribing
Old 10-10-2010, 01:37 PM
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if you have a F.I. tune your MAF is good to 13-14 psi ..then it wont read properly if your doing 8-9 psi Maf is fine 10-12 go SD for a better tune
Old 10-10-2010, 01:50 PM
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I ran MAF with a stock MAP sensor at 10ish psi. The problem is that the computer can only read the MAF signal so far (maxing out the maf) Thats where you need to do one of 2 things. You can "over fuel" where the MAF runs out to avoid leaning out (MAF's/computer can only read so much CFM) or convert to a 2 or 3 bar SD tune. Your better off converting and going to SD from the start...I wish I did lol
Old 10-10-2010, 02:12 PM
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Originally Posted by blue00ZZleeper
I ran MAF with a stock MAP sensor at 10ish psi. The problem is that the computer can only read the MAF signal so far (maxing out the maf) Thats where you need to do one of 2 things. You can "over fuel" where the MAF runs out to avoid leaning out (MAF's/computer can only read so much CFM) or convert to a 2 or 3 bar SD tune. Your better off converting and going to SD from the start...I wish I did lol
^This

D1 Chris knows his stuff.
Old 10-10-2010, 03:07 PM
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<--------------- I have never changed my MAP sensor. LOL!
Old 10-10-2010, 05:34 PM
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It is much easier to go SD and get the MAP sensor at the beginning.
Old 10-10-2010, 06:12 PM
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Originally Posted by 93camaro_zzz
What my friends car did, was when he would get on it, it would go up in vacuum till it hit pretty much 0 psi, and then it would sound like a 2 step would, and not break 0 psi of boost, because he wasn't tuned for anything positive pressure.

So to answer your question, its not "Where does the boost magically go?" You MIGHT break 0 psi, but after that your engine will stall because you're not tuned to operate there, thus you will have no exhaust energy, thus stop spinning the turbo, thus no boost pressure.

Make sense?
Oh and your not even close jordan lol JK



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