The Autonerdz Community Forums - DIY home made pressure transducer & "BLS"

Gogetta Freshman Member Offline Posts: 13 Melbourne AUS, too hot/cold!! Victoria Australia	DIY home made pressure transducer & "BLS" Jul 11^th, 2013 at 7:26am hi guys... have any of u guys tried using a MAP sensor with linear voltage output to read various pressures? EG GM MAP as an exhaust pulse pressure sensor?? im wondering what the BLS " brandon look sensor" is constructed from? anyone?
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KarlW

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Re: DIY home made pressure transducer & "BLS"
Reply #1 - Jul 11^th, 2013 at 10:32am

Gogetta wrote on Jul 11^th, 2013 at 7:26am:

im wondering what the BLS " brandon look sensor" is constructed from?

Gogetta,

May I suggest this-
http://www.autonerdz.com/picokit.htm#_Plus_you_get

I think if you use a lab scope for Automotive use or anything else. plus a DIY guy I think you'll find everything and more of what your looking for. Wink

There are some WICKED SMART peeps in here.

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jarvissamuel

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Re: DIY home made pressure transducer & "BLS"
Reply #2 - Jul 11^th, 2013 at 10:43am

A GM tank sensor probably works better for exhaust pulses. If you replace GM fuel pumps it is pretty easy to pick one up since the new pumps usually have a new sensor.

If they are difficult to come by I have a lot and could send you a couple.

A MAP sesnsor will work for vacuum either will require either using a 9V batt or setting up a 5v supply.

Sam

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Irwin Super Nerd Offline Posts: 645 Oxnard, Ca. California USA Gender:	Re: DIY home made pressure transducer & "BLS" Reply #3 - Jul 11^th, 2013 at 11:31am Map sensors are too filtered for valuable info, unless you're looking for filtered readings.
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Irwin Super Nerd Offline Posts: 645 Oxnard, Ca. California USA Gender:	Re: DIY home made pressure transducer & "BLS" Reply #4 - Jul 11^th, 2013 at 10:26pm I'll have to take back that last statement, the map sensors that I messed around with off of a ford were too filtered to show anything other than linear changes, but as a fellow nerd pointed out to me GM map sensors may be more than sensitive enough to get the job done, let me know what you figure out.
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top4

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Re: DIY home made pressure transducer & "BLS"
Reply #5 - Jul 12^th, 2013 at 1:17am

I am building one like that at this time. I found it at automotive lab scope diagnostics go to sensor testing and waveforms then to build a vacuum probe (sorry I can not give a link) It uses a GM MAP # 16006835. I found one on EBAY $15 NAPA has them but for $106 no way . Any way the rest of the ckt. uses 2 pots and 6volt power and a switch. When I get it done I will give it a try and repost

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brandonb Super Nerd Picogroup Offline Posts: 1,414 arizona Arizona USA	Re: DIY home made pressure transducer & "BLS" Reply #6 - Jul 12^th, 2013 at 9:34am just use a 9v battery and hook directly up to it, if you want it to be scaled like in a car use a lm7805 regulator with the 9v battery at radioshack, three wires (caps not required)
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ceehoppy

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Re: DIY home made pressure transducer & "BLS"
Reply #7 - Jul 17^th, 2013 at 9:31pm

If I read somewhere correctly, Brandon used a piezo electric transducer from RadioShack. It converts mechanical energy (pressure pulses) directly to electrical- so the two leads go right to your scope (no battery needed). You have to fabricate a housing to hold/seal the transducer that you can connect it to your vac port on the engine.

I also use one made from an old GM MAP sensor that's powered by 3 AA batteries.

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busjockey LSD Guide Offline The Diesel Nerd Posts: 3,442 Champaign Illinois USA Gender:	Re: DIY home made pressure transducer & "BLS" Reply #8 - Jul 23^rd, 2013 at 7:01am I'm building a bls sensor right now to use with my mt2400 vantage. I will put up some pictures when I'm done. If anyone. knows Brandon, tell him I said thank you.
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Danny Berry, Sr. Super Nerd Picogroup Offline Elevation 840ft Posts: 710 McDonough, Ga. Georgia USA Gender:	Re: DIY home made pressure transducer & "BLS" Reply #9 - Jul 23^rd, 2013 at 1:43pm I told him...Brandon is well known by everybody here since he joined the nerd site a few years ago. He's one of those individuals that is very knowlegable and is not selfesh about sharing it with others..He'll be glad to hear that you're making one of his many creations busjockey.
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brandonb Super Nerd Picogroup Offline Posts: 1,414 arizona Arizona USA	Re: DIY home made pressure transducer & "BLS" Reply #10 - Jul 23^rd, 2013 at 6:11pm Quote: If anyone. knows Brandon, tell him I said thank you. i know that brandon guy, he's a weirdo thanks danny for the kind comments
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Superglide78 Junior Member Offline Posts: 77 St. Charles Illinois USA Gender:	Re: DIY home made pressure transducer & "BLS" Reply #11 - Aug 6^th, 2013 at 10:29am busjockey wrote on Jul 23^rd, 2013 at 7:01am: I'm building a bls sensor right now to use with my mt2400 vantage. I will put up some pictures when I'm done. Did you finish it? I'm in the process of building one myself.
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busjockey LSD Guide Offline The Diesel Nerd Posts: 3,442 Champaign Illinois USA Gender:	Re: DIY home made pressure transducer & "BLS" Reply #12 - Aug 10^th, 2013 at 7:53am Not yet, have not had time yet. Will post when I'm done.
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