I'm about to order an aem ems. I know i need a gm 3 bar map sensor, but what else. What is a pigtail??? Thanks...also the part number for the mapsensor on gmpartsdirect would be nice

btw, i'm gonna boost until i max out my t3/to4b

Thanks,
sam.


[Modified by BoostedSi, 2:12 AM 1/26/2003]

 

I have the ems. with what i've seen you need to find a really good tuner. you can get an msd 3bar map sensor and a pigtail from autozone or something like that a decent shop will know which one, i'll try to get you the part number for map sensor.

 

I posted a search for what people use with ems maybe a week ago.

 

****** thanks, good thing you told me that...*******

 

That's funny!

 

you need the gm3 bar map sensor pretty cheap from gmpartsdirect.com and u can order the pig tail from them as well.

 

thanks

 

does anyone have directions on how to set up the 3 bar with the ems so that it can be utilized, ive been using my stock one but i have my 3 bar all wired up and ready to go, i just dont know what settings i have to change.

 

What's messed up with AEM is that you have to enter the calibration settings for a 3 bar as to Accell or FAST you just click on 1, 2, or 3 bar and your good to go!!!! AEM told me the reason why I had such a hard time getting my car to idles was because I was running a 3 bar map sensor. They said I should run there 3 bar which is more accurate...WHAT BULLSHIT. I'm running the same three bar I was running with the AEM on the Accell Gen 7 and IT IDLES GREAT and drives like stock.


[Modified by turbo Si, 11:17 PM 1/25/2003]

 

so im wondering how to set it up on the AEM system. any help would be appreciated, thanks.

 

I have one for sale if you are still interested.

 

My 3bar idles great. Apparently, EMS don't even let you just use GM map sensors. They allows you to caliberate any sensor as long as you have the unit specification of the voltages. The AEM map sensors are more accurate but with lots of money compare to the GM. I really don't have any problem with idling or the GM sensor but I do need more resolution as I am sacrificing too much drivibility on a 20 pound map.


[Modified by [Evo]Hybrid, 10:17 AM 1/26/2003]

 

It was hell with mine. I spent count less amounts amounts of time with JP, and Jaime and it still would not idle right. I should of switched to DFI long ago. It's great!

 

Hey tool, check this out, this post, is a waste of server and width and storage.
The search is there for a reason, use it.

 

THere's always gotta be an ******* like you in every thread.

 

ahh...the amount of dumbasses on this board....just quit being a tool, and agree that you should use the search.

end of ******* conversation

 

ahhaha, sure pal. Your the ****** tool posting in her when you think its such a waste of space.

 

Hrm, someone with an AEM MAP pop it open and tell me if there's a chip marked "MAX1460" piggybacked to the MEMS (micro-electro mechanical sensor). The MAX1460 is for speshul digital-sensor signal processing (DSSP), and still pretty much not used in automotive applications - although it will be soon.

I really doubt the AEM MAP is equipped with a MAX1460 chip, meaning that it has the exact same resolution as the GM 3 bar despite any hype surrounding it. The only difference between any two traditional (analog) MAP sensors, if we discount the freq-based Ford MAP and the early inverted scale GM sensor, is span and offset. Since the span is the same between the AEM and GM MAP, 3 bar, then the offset in base signal is the difference.

It should be easy enough to find the pressure to voltage output of the GM 3 bar by conducting a search of the www.diy-efi.org mailing list archives. MAP sensor output is, as I stated previously, a direct pressure to voltage proportion, so after you plot two points on the pressure vs voltage graph you can draw a line and figure exactly where the MAP output is at any of the points AEM wants info on.

Hrm... maybe I should get a social life.

 

this is new!!! So you are saying there is a possibility that the AEM unit is pretty much identical to the GM unit? But then again, you are also doubting it has the same chip.


[Modified by [Evo]Hybrid, 1:42 AM 1/27/2003]

 

I am doubting any currently produced MAP sensor has said MAX 1460 chip. You pop one open and you get at most a chip that houses and EPROM calibration file and a DAC (digital-analog converter).

The MAX1460 is new-ish technology. It may have found it's way into one or two new cars in the last year or two, but it's pretty much not used at all, by anyone - yet. With the ever increasing push for emissions, finer and finer tuning of AF mixture and the sensors required for this will make the MAX1460 equipped MAP sensors pretty common pretty soon.

There is a chance the AEM is equipped with the MAX1460, but I'm a big doubter of things when the old cheap method has worked well enough so far. If it does not have the MAX1460, then any increase in resolution over the GM 3 bar, due to construction, is negligible.

FYI, I'd have a MAX1460 chip in my hand right now, but maxim-IC is really really gay about sending out samples. I count myself lucky to have the two MAX233 chips I need for TTL to RS-232 conversion so I can build PC to ECU interface cables.


[Modified by J. Davis, 6:08 PM 1/26/2003]

 

so what settings have to be changed on the ems to run the GM 3 bar map.

 

I still don't understand why AEM thinks there map sensors are better than others. Everyone just about runs GM map sensors!

 

here you mother f*^ker do a search next time.Im just kidding enjoy

https://honda-tech.com/zerothread?id=390062

 

The AEM MAP sensors are accurate within 0.5%. If you look in a GM shop manual you will see that GM specifies a 5% deviance in there (Delco) MAP sensors. This is why the 3 Bar GM sensors range anywhere from 28-33psig.

 

Is this like a require when you get ems to get a new map sensor..? everyday i end up buying more and more sutff for this kit this hobby is mad expensive ....