FreeMAP - Taking the bullsh*t out MAP selection.

Free Open Source Hardware discussion forum. Post your Free Open Source hardware projects here!
Post Reply
User avatar
Preston
LQFP112 - Up with the play
Posts: 128
Joined: Fri Feb 26, 2010 5:26 am
Location: Aucks

FreeMAP - Taking the bullsh*t out MAP selection.

Post by Preston »

There is a lot of information floating around about OEM Map sensors, which ones are better for what uses, how accurate they are, so on. A fair chuck of it is just plain rubbish and has NO scientific backing, as I have come to find.

With the above in mind, I have built a specific test bed to test and then compare MAP sensor results.

The project can be followed here https://github.com/presto/MapSensors at the moment the data is in excel spread sheet format, that can be opened in open office too. There is a pdf version for good measure.

The AIM here is to clear the air for MAP sensors! get reliable tested and accurate information about each unit and house it all nicely in one location.

Let the work begin!!

Preston.
User avatar
Fred
Moderator
Posts: 15431
Joined: Tue Jan 15, 2008 2:31 pm
Location: Home sweet home!
Contact:

Re: FreeMAP - Taking the bullsh*t out MAP selection.

Post by Fred »

Good man! Presto, you should grab Sim's results from his thread(s) and include them, they proved to be fairly accurate. Also, chuck the original images in an images dir in the repo with informative names :-)

I look forward to using your data to select cheap DIY MAP sensors in future! :-)

Fred.
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!
User avatar
Spudmn
LQFP112 - Up with the play
Posts: 232
Joined: Thu Feb 10, 2011 12:27 am
Location: Auckland, NZ

Re: FreeMAP - Taking the bullsh*t out MAP selection.

Post by Spudmn »

Hi Presto

I have 2 more sensors that you can test and add to your list.

Denso 079800 1691 5V PS-22

And

Toyota 89421-20020 079800-0343 5V

I am happy to loan them to you for testing.
User avatar
Preston
LQFP112 - Up with the play
Posts: 128
Joined: Fri Feb 26, 2010 5:26 am
Location: Aucks

Re: FreeMAP - Taking the bullsh*t out MAP selection.

Post by Preston »

Spudmn wrote:Hi Presto

I have 2 more sensors that you can test and add to your list.

Denso 079800 1691 5V PS-22

And

Toyota 89421-20020 079800-0343 5V

I am happy to loan them to you for testing.
Wicked, we will do that!!! man we gotta catch up and I'll grab the sensors then, I want to see this mini in action :P
User avatar
Fred
Moderator
Posts: 15431
Joined: Tue Jan 15, 2008 2:31 pm
Location: Home sweet home!
Contact:

Re: FreeMAP - Taking the bullsh*t out MAP selection.

Post by Fred »

The three of you, Dan, Preston, Aaron all need to catch up, but AT the OS.co.nz meet at BF with your cars, on trailers if need be, for an impressive show of tech for the os.co.nzers :-)
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!
User avatar
Fred
Moderator
Posts: 15431
Joined: Tue Jan 15, 2008 2:31 pm
Location: Home sweet home!
Contact:

Re: FreeMAP - Taking the bullsh*t out MAP selection.

Post by Fred »

Presto, do you have this sensor:

The MAP sensor on the engine AN08:
079800-5410
5V PS-4A
DENSO

It's from that 2002 Honda, we need a good calibration for it :-) K, thx, bye.

Fred.
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!
User avatar
Fred
Moderator
Posts: 15431
Joined: Tue Jan 15, 2008 2:31 pm
Location: Home sweet home!
Contact:

Re: FreeMAP - Taking the bullsh*t out MAP selection.

Post by Fred »

Bump for similarly high-quality data for any other sensors out there!
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!
User avatar
sim
LQFP112 - Up with the play
Posts: 112
Joined: Thu Jun 02, 2011 8:17 pm

Re: FreeMAP - Taking the bullsh*t out MAP selection.

Post by sim »

From a Honda Civic, I'm pretty sure:

Image

Tested with a multimeter and a Mityvac pump with a gauge:

Image

(Feel free to copy/publish the pictures.)
<@TekniQue> but in the end, it's code that makes a computer useful
kjb
TO220 - Visibile
Posts: 8
Joined: Tue Apr 13, 2010 11:26 am
Location: Kerava, Finland
Contact:

Re: FreeMAP - Taking the bullsh*t out MAP selection.

Post by kjb »

Most likely from a Civic or Legend:
Denso 079800-1691

Prelude:
Denso 079800-2520

Spreadsheet

The power supply was a crappy universal one so the 5Vin was less than ideal. The pump was a Beta 960P w/ gauge, Vout was measured with a cheap multimeter :?
User avatar
Fred
Moderator
Posts: 15431
Joined: Tue Jan 15, 2008 2:31 pm
Location: Home sweet home!
Contact:

Re: FreeMAP - Taking the bullsh*t out MAP selection.

Post by Fred »

Apparently the other side of both above sensors, and likely other ones too, look like this:

Image
DIYEFI.org - where Open Source means Open Source, and Free means Freedom
FreeEMS.org - the open source engine management system
FreeEMS dev diary and its comments thread and my turbo truck!
n00bs, do NOT PM or email tech questions! Use the forum!
The ever growing list of FreeEMS success stories!
Post Reply