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hey does the ecu read the boost in closed loop and start to self ajust the a/f ratios if ur running under 10psi, ive been told under 10 psi u dont need a missing link or es1, but im not going to have to keep reseting my ecu am i?

 
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i know the stock map sensor on a K-serries can read boost up to 10 pounds with out changing over to the 3-bar, im sure the D17 is the same. *edit* but when i had a turbo on my D17 i rember having to run check valves, so maybe not.

 
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under 10 psi and you dont need a new map sensor, but any sort of piggyback should be able to skew the map sensor into reading no boost even when its there. It can read boost, it should adjust in closed loop for running lean just like every other scenario, the issue is whether you throw out the fuel trim far enough to **** it off.

 
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okay so as far as i understand under 10psi i should not have a problem as long as i dont throw my fuel to far right?

 
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well you need to give emanage a boost reference ( it needs the greddy map sensor), and it will skew the stocker to thinking there's no boost.

 
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sweet tks dude

 
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the ecu will adjust the fuel according to the oxygen sensor, the ecu wants you to run 14.7;1 to be efficient on gas. on a boosted motor you want to run more rich to get more power and be safe. when you start using the emanagge to adjust the fuel ratio to (lets say) 12.0;1 , the ecu will say, hey tahts too rich...and it will adjust your short term fuel trim (over a long period of time affecting your long term fuel trim which is used in open loop). so as you tune the car to 12;1 fuel ratio over time the cars gonna make that leaner and leaner to try and reach 14.7;1
your only going to be adding fuel when boost is present so the ecu will do this at the same time.
the trick is the es1 interrupts the oxygen sensors signal letting the car think the oxygen sensor isnt warm enough to read and thus the ecu will run off of long term fuel trim(open loop) which doesnt get changed. (long term fuel trim is only changed while your in short term and it slowly follows short term fuel trim)

this has nothing to do with the map sensor, the above posts didnt answer the question correctly. im not trying to be a dick, just dont want you to be mis-informed.

EDIT: the map sensor has NOTHING To do with a/f ratio. it is a reference on how much air is flowing into the engine, the engine uses this information and compares it to data stored in the engine by honda, that data tells them how much fuel it roughly needs, from there on the oxygen sensor controls the specific a/f ratio.

 
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okay so whats the story here, im planning on running 8psi boost on a t3... can the emanage blue do it alone without problems with a good tune or do i need the es1 thingy to stop the ecu from reading boost, cuz the last thing i want is to have to reset my ecu all the time or blow up my d.

 
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the es1 doesnt stop the ecu from reading boost.
the es1 reads boost itself, when it sees boost it stops the ecu from adjusting fuel.
you wont have to reset your ecu with this.
what theyre doing by resetting the ecu is erasing the ecu's fuel adjustments its saved, its really not a dependable way to go. its a half-assed thing to do.

 
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hmm w/e if it works.... so final answer, and i want more then one person to answer this, running under 10psi on a d17a1 i DO or DO NOT need the esc1?

 
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You don't need it man. It will help with your tune im sure but plenty of ppl run turbo setups w/o it. The choice is yours.

 
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yea you dont NEED it, my car was tuned without it, but it will help.