maf voltage at idle - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


ECUs and Tuning Discuss Engine Management, Tuning, & Programming

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 02-21-2011, 08:21 PM   #1
I'm Miserable!
Thread Starter
 
Join Date: Jun 2009
Location: albany, ga
Posts: 1,869
Total Cats: 3
Default maf voltage at idle

Does anyone know off hand what the maf voltage is at idle on a 1.8l engine or around. Also does anyone have a map of grams a second to voltage of the 1.8l maf.

Interested in how much air the engine is drawing in at idle.
Techsalvager is offline   Reply With Quote
Old 02-21-2011, 09:28 PM   #2
AFM Crusader
iTrader: (18)
 
olderguy's Avatar
 
Join Date: Oct 2004
Location: Wayne, NJ
Posts: 4,438
Total Cats: 84
Default

olderguy is offline   Reply With Quote
Old 02-21-2011, 10:30 PM   #3
I'm Miserable!
Thread Starter
 
Join Date: Jun 2009
Location: albany, ga
Posts: 1,869
Total Cats: 3
Default

olderguy whats the link for?
I see, unfourntaly I don't think that will give me the info I need.
Thanks though olderguy

Last edited by Techsalvager; 02-21-2011 at 10:56 PM.
Techsalvager is offline   Reply With Quote
Old 02-21-2011, 10:34 PM   #4
I'm Miserable!
 
Join Date: Feb 2010
Posts: 584
Total Cats: 0
Default

And the logger sez…

sjmarcy is offline   Reply With Quote
Old 02-21-2011, 10:44 PM   #5
I'm Miserable!
Thread Starter
 
Join Date: Jun 2009
Location: albany, ga
Posts: 1,869
Total Cats: 3
Default

sjmarcy do you have grams a second to voltage for that maf output?
Techsalvager is offline   Reply With Quote
Old 02-21-2011, 10:48 PM   #6
I'm Miserable!
 
Join Date: Feb 2010
Posts: 584
Total Cats: 0
Default

Quote:
Originally Posted by Techsalvager View Post
sjmarcy do you have grams a second to voltage for that maf output?
I could come up with one. But my "fans" here might have their heads explode. Do you think we should risk it?



What are you trying to accomplish, exactly?
sjmarcy is offline   Reply With Quote
Old 02-21-2011, 10:51 PM   #7
I'm Miserable!
Thread Starter
 
Join Date: Jun 2009
Location: albany, ga
Posts: 1,869
Total Cats: 3
Default

Looking to see what the draw of airflow is at idle in grams a second to see if my KA24DE maf I have will be ok or if it will not scale correctly at idle. Considering the 2.4l is a bigger engine and probably wouldn't need to go as low as 1.6l\1.8l equiped maf would need to.

Looking to implement it in the MS2 I have.
Techsalvager is offline   Reply With Quote
Old 02-21-2011, 11:08 PM   #8
I'm Miserable!
 
Join Date: Feb 2010
Posts: 584
Total Cats: 0
Default

Quote:
Originally Posted by Techsalvager View Post
Looking to see what the draw of airflow is at idle in grams a second to see if my KA24DE maf I have will be ok or if it will not scale correctly at idle. Considering the 2.4l is a bigger engine and probably wouldn't need to go as low as 1.6l\1.8l equiped maf would need to.

Looking to implement it in the MS2 I have.
So…you plan to use the Honda MAF on your Miata?
sjmarcy is offline   Reply With Quote
Old 02-21-2011, 11:10 PM   #9
I'm Miserable!
Thread Starter
 
Join Date: Jun 2009
Location: albany, ga
Posts: 1,869
Total Cats: 3
Default

Quote:
Originally Posted by sjmarcy View Post
So…you plan to use the Honda MAF on your Miata?
Nissan maf
Yes if it can scale to what the engine will draw in.
Techsalvager is offline   Reply With Quote
Old 02-21-2011, 11:13 PM   #10
I'm Miserable!
 
Join Date: Feb 2010
Posts: 584
Total Cats: 0
Default

Quote:
Originally Posted by Techsalvager View Post
Nissan maf
Yes if it can scale to what the engine will draw in.
Ok, Nissan.

I don't see why you couldn't accomplish this.

The MAF itself provides a voltage output (not frequency), yes?

The muscle car guys run large MAFs all the time. They do things like change sensor tube sizes, process the voltage via opamps, or do it all in the 'puter.
sjmarcy is offline   Reply With Quote
Old 02-21-2011, 11:20 PM   #11
I'm Miserable!
Thread Starter
 
Join Date: Jun 2009
Location: albany, ga
Posts: 1,869
Total Cats: 3
Default

Quote:
Originally Posted by sjmarcy View Post
Ok, Nissan.

I don't see why you couldn't accomplish this.

The MAF itself provides a voltage output (not frequency), yes?

The muscle car guys run large MAFs all the time. They do things like change sensor tube sizes, process the voltage via opamps, or do it all in the 'puter.
yes it is voltage output 0-5v
Techsalvager is offline   Reply With Quote
Old 02-21-2011, 11:23 PM   #12
I'm Miserable!
 
Join Date: Feb 2010
Posts: 584
Total Cats: 0
Default

Quote:
Originally Posted by Techsalvager View Post
yes it is voltage output 0-5v
Ok then as Nike says, Just Do It.

I guess you'll need MAP too as you are boosting IIRC.

Can you describe your plans in more detail? Thanks.
sjmarcy is offline   Reply With Quote
Old 02-21-2011, 11:39 PM   #13
Elite Member
 
Join Date: Feb 2008
Location: Victoria, BC
Posts: 2,322
Total Cats: 12
Default

I can't really add much to this, but is there any reason why you're going to all this work fitting a differentn MAF onto the car when you could easily switch it over to MAP and get ride of the MAF altogether?
dustinb is offline   Reply With Quote
Old 02-21-2011, 11:40 PM   #14
I'm Miserable!
Thread Starter
 
Join Date: Jun 2009
Location: albany, ga
Posts: 1,869
Total Cats: 3
Default

Quote:
Originally Posted by sjmarcy View Post
Ok then as Nike says, Just Do It.

I guess you'll need MAP too as you are boosting IIRC.

Can you describe your plans in more detail? Thanks.
The map sensor will stay in there reguardless because I stuck it in there and could use it to fall back to.

Plan is to install the MAF and tune for fueling with it, I believe the maf use the AFRtable instead of the VEtable to deal with fueling. So putting 14.7 in the 1000rpm vs 30kpa box while your maf is around that area should net you 14.7 AFR's. so instead of using a fuel VE table to tune in your desired AFR outputs are rpm vs load you use something that seems easier imo. But I'm not the smartest person so we will see.

plans though are to install the maf, wire the maf circuit into the ms2, build the correct inc table for tunerstudio, 1024 adc to grams a second points.
maf will be placed post turbo.

tune my speed density setup a little more because of changes in pipping, it litteraly changed the overall tune and has pissed me off. Makes me wonder if the resonace chamber ( airbox near tb ) has more behind it than just for quieting sound.

I will leave the map sensor in for the turbo and probably look at using mafmap blend, once it starts hitting boost than I can let it take over for VE table, though it makes me wonder about some stuff in different altitudes.
Techsalvager is offline   Reply With Quote
Old 02-21-2011, 11:44 PM   #15
I'm Miserable!
Thread Starter
 
Join Date: Jun 2009
Location: albany, ga
Posts: 1,869
Total Cats: 3
Default

Quote:
Originally Posted by dustinb View Post
I can't really add much to this, but is there any reason why you're going to all this work fitting a differentn MAF onto the car when you could easily switch it over to MAP and get ride of the MAF altogether?
I want to measure airflow not compute it. And since no one has done it that I've seen other than few people I want to see how hard or easy it is and if there are benefits or not.
Techsalvager is offline   Reply With Quote
Old 02-22-2011, 08:56 AM   #16
AFM Crusader
iTrader: (18)
 
olderguy's Avatar
 
Join Date: Oct 2004
Location: Wayne, NJ
Posts: 4,438
Total Cats: 84
Default

Quote:
Originally Posted by Techsalvager View Post
olderguy whats the link for?
I see, unfourntaly I don't think that will give me the info I need.
Thanks though olderguy
Click on "how it works" and go half way down the page. You asked for MAF voltages
olderguy is offline   Reply With Quote
Old 02-22-2011, 10:59 PM   #17
I'm Miserable!
Thread Starter
 
Join Date: Jun 2009
Location: albany, ga
Posts: 1,869
Total Cats: 3
Default

yes but without knowing the voltage to grams conversion, I'll just have to see what happens
Techsalvager is offline   Reply With Quote
Old 02-22-2011, 11:05 PM   #18
I'm Miserable!
 
Join Date: Feb 2010
Posts: 584
Total Cats: 0
Default

Quote:
Originally Posted by Techsalvager View Post
yes but without knowing the voltage to grams conversion, I'll just have to see what happens
Doesn't really matter. You have to scale anyway based on how the car reacts. It's trivial.
sjmarcy is offline   Reply With Quote
Old 01-26-2012, 05:53 PM   #19
I'm Miserable!
Thread Starter
 
Join Date: Jun 2009
Location: albany, ga
Posts: 1,869
Total Cats: 3
Default

bump this up, still looking for the idle grams a second of a 1.8.
Techsalvager is offline   Reply With Quote
Old 01-26-2012, 05:55 PM   #20
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Delicious and Moist.
Posts: 26,326
Total Cats: 1,926
Default

Why do you need to know g/s? Just install the MAF sensor and log it.
Joe Perez is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
Are my coils failing? viriiguy General Miata Chat 5 09-28-2015 08:39 PM
Another Alternator thread ihiryu General Miata Chat 9 09-28-2015 11:22 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:37 AM.