E-manage: Clearing up myths and such.... |Dezod Motorsports LLC|

[tfnaaf]

Originally Posted by turboengnr Another quick question that i know a lot of people have... how many volts does the MAP sensor see under zero vaccum? And where do you think they should clamp the MAP sensor voltage at? Ive been asked this many times, and i know it all varies due to conditions. But you are much more experienced with the emanage than i am, so i figure you could elaborate on this a little better than i could. copied from HERE are the specs for the greddy sensor PSI - Voltage - inHg -14= 0.54 -- 28.504 -13= 0.60 -- 26.468 -12= 0.67 -- 24.432 -11= 0.74 -- 22.396 -10= 0.81 -- 20.36 -9= 0.88 -- 18.324 -8= 0.95 -- 16.288 -7= 1.02 -- 14.252 -6= 1.09 -- 12.216 -5= 1.16 -- 10.18 -4= 1.22 -- 8.144 -3= 1.29 -- 6.108 -2= 1.36 -- 4.072 -1= 1.43 -- 2.036 0= 1.50 1= 1.57 2= 1.64 3= 1.71 4= 1.78 5= 1.84 6= 1.91 7= 1.98 8= 2.05 9= 2.12 10= 2.19 11= 2.26 12= 2.33 13= 2.40 14= 2.46 15= 2.53 16= 2.60 17= 2.67 18= 2.74 19= 2.81 20= 2.88 21= 2.95 22= 3.02 23= 3.09 24= 3.15 25= 3.22 26= 3.29 27= 3.36 28= 3.43 29= 3.50 30= 3.57 31= 3.64 32= 3.71 33= 3.77 34= 3.84 35= 3.91 36= 3.98 37= 4.05 38= 4.12 39= 4.19 40= 4.26 41= 4.33 42= 4.39 43= 4.46

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[DaRk_MauL]

[dezod]

Originally Posted by turboengnr

Another quick question that i know a lot of people have...

how many volts does the MAP sensor see under zero vaccum? And where do you think they should clamp the MAP sensor voltage at?

Ive been asked this many times, and i know it all varies due to conditions. But you are much more experienced with the emanage than i am, so i figure you could elaborate on this a little better than i could.

Originally Posted by tfnaaf

copied from HERE are the specs for the greddy sensor

Thanks Tnaff. Saved me some typing. Map trace function is great to use as well.

[jackburton]

I still do not understand what clamping the map voltage means, why he asked about zero vaccum pressure, or what those numbers mean exactly?
Thanks for the the thread dezod, it answered a lot of questions I had.

[dezod]

Originally Posted by jackburton

I still do not understand what clamping the map voltage means, why he asked about zero vaccum pressure, or what those numbers mean exactly?
Thanks for the the thread dezod, it answered a lot of questions I had.

The voltage clamp prevents the ECU from seeing a certain amount of MAP voltage. Let's say 5V = 100% throttle. So if you clamp it at 4.5V, the ECU thinks it never sees past 78% throttle. So you will have to tune all fuel delivery above and beyond that. That is what the voltage clamp does.
Furthermore, if you are not careful and clamp too at say 3V out of 5V, you will max out your injectors quickly because now you have to accomodate for normal fuel delivery on top of boost fuel requirements.

The voltages listed above are how the GReddy Pressure Sensor voltage is read in terms of boost amounts. Thats all.

[turboengnr]

I meant the stock map sensor.

I dont have a specific answer to where people are clamping the stock sensor at. Are you clamping it at 3.5v? 4.5v? 4.95v? And also a short explanation of why you are clamping it there.

Thats what i was getting at. Not voltage of the greddy sensor.

[ill02civic]

good shit

[dezod]

Originally Posted by turboengnr

I meant the stock map sensor.

I dont have a specific answer to where people are clamping the stock sensor at. Are you clamping it at 3.5v? 4.5v? 4.95v? And also a short explanation of why you are clamping it there.

Thats what i was getting at. Not voltage of the greddy sensor.

I am hearing many people say 4.95V, but I am not sure the stock MAP even sees 5 volts................

[turboengnr]

you see, thats what i thought.

I have heard that the stock honda MAP sensors can read up to 7 psi of boost (when monitored with a hondata unit)

So i wouldnt think they would be at 5v at zero vaccum.

[collinshill26]

so your sayin that eventho we have 310cc injectors we can tell the computer they are lower?like 280-300

[tfnaaf]

Originally Posted by turboengnr

I meant the stock map sensor.

I dont have a specific answer to where people are clamping the stock sensor at. Are you clamping it at 3.5v? 4.5v? 4.95v? And also a short explanation of why you are clamping it there.

Thats what i was getting at. Not voltage of the greddy sensor.

mine is clamped at 5 volts and ive never had a CEL because of boost

[e04241]

what is a CEL?

[dezod]

Originally Posted by e04241

what is a CEL?

Check-Engine-Light.

Originally Posted by turboengnr

you see, thats what i thought.

I have heard that the stock honda MAP sensors can read up to 7 psi of boost (when monitored with a hondata unit)

So i wouldnt think they would be at 5v at zero vaccum.

I clamped mine a while ago @ 3V and started maxing out the RSX injectors big time on the top end.

According to another source the Synapse ML clamps the voltage at about 3V.

[turboengnr]

Originally Posted by tfnaaf

mine is clamped at 5 volts and ive never had a CEL because of boost

I have mine clamped at 4.95 volts, and i know i have been borderline on boost.

So you have an even 5v and no cel. That is a good thing to know.

[dezod]

Originally Posted by turboengnr

I have mine clamped at 4.95 volts, and i know i have been borderline on boost.

So you have an even 5v and no cel. That is a good thing to know.

Hmmmmmm.