3 bar map sensor

[HondaPower]

Where do I get one? They are all over Ebay, should I get it from there? CLICK (http://cgi.ebay.com/ebaymotors/HONDATA-AEM-HALTECH-DFI-GM-3-BAR-MAP-SENSOR-CONNECTOR_W0QQcmdZViewItemQQcategoryZ33553QQihZ016 QQitemZ260042437851QQrdZ1QQsspagenameZWDVW)

[nicklk]

Where do I get one? They are all over Ebay, should I get it from there? CLICK (http://cgi.ebay.com/ebaymotors/HONDATA-AEM-HALTECH-DFI-GM-3-BAR-MAP-SENSOR-CONNECTOR_W0QQcmdZViewItemQQcategoryZ33553QQihZ016 QQitemZ260042437851QQrdZ1QQsspagenameZWDVW)

How much boost do you plan on running right off the bat?? You know a Honda map sensor is good up to 14psi right?

[HONDA GHANDI]

Honda maps only read effectively to 10.5 or 11 psi. Not 14.
I usually keep the 3 bars in stock but I sold my last one today. Should have more in by the end of the week.

[HondaPower]

I pretty much want one in case I max out my stock map sensor and haven't reach my whp goal. I don't want to be stuck and have a retune session.

[HondaPower]

Tobi, how much your 3 bar maps run?

[HONDA GHANDI]

$90 for the kit which includes the sensor, connector and pigtails, and instructions.

[HondaPower]

Sounds pretty good. I might have to get one from you.

[Weston-work]

I pretty much want one in case I max out my stock map sensor and haven't reach my whp goal. I don't want to be stuck and have a retune session.

Good thinking. It's also good to have something that's actually meant to handle boost... I managed to eventually kill my stock MAP sensor while running 9 psi, and it turns out that this is not uncommon with stock Honda MAP's.

I recently picked up a Motorola 2.5 bar MAP sensor, but it's tiny (the size of the tip of my pinky finger) and looks delicate. I have a feeling it wasn't designed for an under-hood automotive application, so we'll see how well it actually works... I may end up having to get the GM 3 bar...

[nicklk]

Honda maps only read effectively to 10.5 or 11 psi. Not 14.


http://forums.offtopic.com/images/smilies/pat.gif

DOH! I'm a retard, I was thinking 12 and typed 14......I've seen plenty of stock MAP's running 12 all day long???



I pretty much want one in case I max out my stock map sensor and haven't reach my whp goal. I don't want to be stuck and have a retune session.

Good thinking!

[HONDA GHANDI]

12 gauge pressure. That is usually around 10 Absolute at this altitude. At 10.5 they become unstable and stop reading. They flatline at about 4.6V. At 12 they hit full 5V and the ECU sets a code.

[Kwando]

I have one that I boguth used.. I just need to find out how to wire it

[Nick_S]

how well do missing links work?

[nicklk]

I have one that I boguth used.. I just need to find out how to wire it

http://www.hondata.com/tech3barmap.html

[Weston]

how well do missing links work?

They don't work. They blind the MAP sensor to boost, so you have to supply fuel for boost by jacking up the fuel pressure to an insane level (ie using a "FMU"), which is extremely ghetto and also unsafe.

[Kwando]

http://www.hondata.com/tech3barmap.html

sweet... thx

[ComputerJLT]

you can get a motorolla 2.5bar map for free-$20usd shipped. I've used three of them so far, great little pieces.

[rmcdaniels]

I wouldn't use a GM 3 BAR map for anything over 15 PSI. My last two got real non-linear by the time they got over 18 PSI. I sold my last one and got a calibrated AEM MAP sensor, it's perfectly linear.

[HONDA GHANDI]

Hmm, havent had any issues with mine. Were yours GM parts or aftermarket?

[Weston-work]

I wouldn't use a GM 3 BAR map for anything over 15 PSI. My last two got real non-linear by the time they got over 18 PSI. I sold my last one and got a calibrated AEM MAP sensor, it's perfectly linear.

Were they consistently non-linear (ie you could still tune for it), or were they just all over the place?

[Nick_S]

They don't work. They blind the MAP sensor to boost, so you have to supply fuel for boost by jacking up the fuel pressure to an insane level (ie using a "FMU"), which is extremely ghetto and also unsafe.

right on, thanks for the good info.

[dcsportsciv]

not to bash tobi by any means but i tuned my red civic with the stock mapsensor at 15psi....I know, I didnt think it would work either but we couldnt get the aem 3bar to work on uberdata....But i can vouch for the 15....maybe im lucky i dont know.

[ComputerJLT]

honda map sensors are physically limited to around 11psi, some more some less. the peizio sensor physically hits the internals of the sensor and stops. And if you got one sensor with a bit more play and tuned it at this altitude 15psi would be pushing it to the edge.

Also with hacked code (hondata, crome, ud, bre, etc) you can run the maps past the limit of the map sensor. The map sensor is reading 11psi but actual manifold pressure is 15psi but the last colum in the maps are tuned for that pressure. That works but it's dangerous, if you overboost you have no way for the EMS to protect the motor.

[Weston-work]

not to bash tobi by any means but i tuned my red civic with the stock mapsensor at 15psi....I know, I didnt think it would work either but we couldnt get the aem 3bar to work on uberdata....But i can vouch for the 15....maybe im lucky i dont know.

You can tune any boost level the stock MAP sensor, assuming it's not so high that it destroys it, but you're not going to be able to tune the individual boost levels after 10 psi absolute, which is about 12-13 psi relative pressure in the Denver area. In other words, to get the fuel and ignition correct at 15 psi, you are putting those settings at the MAP sensor's highest supported boost level (12-13 psi). That can work fine at 15 psi, but when you're at 10-14 psi, you're going to be running rich with more ignition retard than you need. You also have no ability to use overboost protection.

[dcsportsciv]

I can understand that. The map on the dyno chart was perfect when we got it. but i see what you guys are saying. We just couldnt get the aem 3 bar to tune right. it leaned out a butt load everytime we tryed to even run it.

[Weston-work]

I can understand that. The map on the dyno chart was perfect when we got it. but i see what you guys are saying. We just couldnt get the aem 3 bar to tune right. it leaned out a butt load everytime we tryed to even run it.

Yeah, I know what you mean... If you switch the MAP sensor setting in Uberdata, all it really does to the maps is change the vac / boost level that is displayed on the screen, so you have to manually move the columns over (which there isn't an easy way to do in Uberdata), then generate new values for 10+ psi. If you don't, you end up running lean as hell with excessive ignition advance. I believe CROME handles this a bit better.

[dcsportsciv]

Yeah we did change the setting and it still messed up. We changed settings. we moved columns and it never changed. it was like the 3 bar was going to run the car the way it wanted to run.

[rmcdaniels]

I've had two of them that were non-linear, both from GM. They were okay below 15 PSI, but got progessively got worse the more boost I ran, getting ridiculous somewhere around 18-20 PSI. I was running 23 or so PSI at the time, so it was annoying. They were consistent, so it was tunable, but one night at the track I was messing with the boost controller and used the ECU to set it instead of the boost guage. I thought I was making 22 PSI when it was closer to 30 and I melted my pistons. After I got a calibrated, linear AEM MAP sensor, I realized what I'd been missing.

[ghost_masterCL]

so will these 3bar map sensors work for any honda engine or just specific ones?

[boostedEG]

so will these 3bar map sensors work for any honda engine or just specific ones?

should work for any.

as long as you have a 3 wire map sensor that works off the same 5 volt reference signal.

you have to have some form of EMS to tune for the different map sensors too though.