Thats what everybody gets and even Hondata themselves sells them. but Hondata is limited to 28.8psi so why not get a 2 bar map sensor. 2 bar is 29.4psi and cost like $40 less than a 3 bar sensor. I personally wont ever boost past 20psi. so wouldnt a 2 bar map sensor suit me better?

 

Because this is how it works from what I understand....

vacuum to 0 = 1 bar
0 - ~14.5 = 2nd bar
~14.6 - ~28 = 3rd bar

Technically to run over 28 psi you would need a 4 or a 5 bar mapsensor depending on what was available and if Hondata had support for it.

 

hmmm, can someone confirm this..

 

can you switch to a 3 bar map sensor and drive the car before you get the hondata?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by integra_gsr98 &raquo;</TD></TR><TR><TD CLASS="quote">Because this is how it works from what I understand....

vacuum to 0 = 1 bar
0 - ~14.5 = 2nd bar
~14.6 - ~28 = 3rd bar
</TD></TR></TABLE>

That's correct. Remember that you have to overcome atmospheric pressure first, which is exactly 1BAR. 2BAR = ~28psi, but subtract the atmospheric pressure and you end up with ~14.5psi of MANIFOLD PRESSURE. That's why you need a 3BAR sensor for anything ABOVE 14.5psi of MANIFOLD PRESSURE.

Got it?

 

just remember fellas, i believe the OEM map sensor stops reading at 11.7 psi. so if you plan on running more than that, then thats when u need a 3 bar.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboChrgd_Civic &raquo;</TD></TR><TR><TD CLASS="quote">can you switch to a 3 bar map sensor and drive the car before you get the hondata?</TD></TR></TABLE>

I don't see why not? As long as you don't go over 2BAR of manifold pressure, it should be okay? I haven't done it personally, so don't quote me on it though...

But logically, it should be fine? The only conflict I can think of is that the 3BAR sensor isn't compatible with the stock Honda ECU? Different voltage output?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98CTRCoupe &raquo;</TD></TR><TR><TD CLASS="quote">

But logically, it should be fine? The only conflict I can think of is that the 3BAR sensor isn't compatible with the stock Honda ECU? Different voltage output? </TD></TR></TABLE>

yeah the voltage output is different..i will start but won't idle for **** and then it will die..

 

ok thanks. I was just tyring to get it prepared for when I hit the dyno, but I guess I'll just wait to change it...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboChrgd_Civic &raquo;</TD></TR><TR><TD CLASS="quote">ok thanks. I was just tyring to get it prepared for when I hit the dyno, but I guess I'll just wait to change it...</TD></TR></TABLE>

you could get someone to burn a base map chip for you the you could drive the car around town and to the dyno.im me if you need one.

 

If you run a 2 Bar Map Sensor your car will run like crap! I had bought a SUPPOSEDLY GM 3 Bar map sensor from Advance Auto parts and when put on the car it ran LIKE ****! Come to find out it was a 2 Bar map sensor even though it was specifically for a 89 Turbo Trans Am the only vehicle ever equipped witha GM 3 bar map sensor. SO get a 3 Bar map and make sure the Hondata internally is set up for the 3 Bar as opposed to the stock map sensor. Good luck.

 

what if you just use the check valve (missing link)?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by T3T495GSR &raquo;</TD></TR><TR><TD CLASS="quote">what if you just use the check valve (missing link)? </TD></TR></TABLE>

You can't do this with Hondata because the MAP sensor is what tells the Hondata to add more fuel... The MAP sensor has to be able to read the boost pressure at the TB so it can add more fuel with boost...

 

missing link if not using hondata

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboChrgd_Civic &raquo;</TD></TR><TR><TD CLASS="quote">can you switch to a 3 bar map sensor and drive the car before you get the hondata?</TD></TR></TABLE>

no, you have to either calibrate the ecu to accept the voltage range from the 3bar sensor or get a hondata pre-programmed for a 3bar.

If you got a hondata progged for a 2bar and tossed on a 3bar...you'd have to re-prog it.

no, you don't want to run a missing link on a 3bar sensor...even though you wouldn't in the first place due to it's physical design...

It's useless to run a 3bar sensor on a setup that will probably never see more than 20-25psi of pressure as you'll always be reading really low on it and the ecu will be compensating for that low reading (yes, even a hondata). You optimally want to be running at the middle of the sensor's reading range thus the 2bar would be better for that.

 

so id be fine using my stock map sensor on say 8psi?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nine nine si &raquo;</TD></TR><TR><TD CLASS="quote">so id be fine using my stock map sensor on say 8psi?</TD></TR></TABLE>

I do all day long...

Either use your stock map sensor with a greddy blue box

OR

get a missing link and run whatever else you want such as a vortech fmu, etc

 

where can i get the gm 3 bar map sensor for cheap?

also anyone have a DIY on how to wire it up???

thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by stackz &raquo;</TD></TR><TR><TD CLASS="quote">
It's useless to run a 3bar sensor on a setup that will probably never see more than 20-25psi of pressure as you'll always be reading really low on it and the ecu will be compensating for that low reading (yes, even a hondata). You optimally want to be running at the middle of the sensor's reading range thus the 2bar would be better for that.</TD></TR></TABLE>

Look above and read integra_gsr98's post. At 20-25 psi of boost, you would *not* be o.k. using a 2bar.

And IIRC the stock map sensors stop reading accurately after 9.5-10.5psi depending on model... not to say you can't run more. But you probably shouldn't.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TEAM JSJ &raquo;</TD></TR><TR><TD CLASS="quote">where can i get the gm 3 bar map sensor for cheap?

also anyone have a DIY on how to wire it up???

thanks</TD></TR></TABLE>

DITTO ANYONE????

 

http://www.GMpartsdirect.com

http://www.hondata.com/3barinstall.html