MEGAsquirt A place to collectively sort out this megasquirt gizmo

Convert cranking ms to pw %

Old 02-13-2008, 12:19 PM
  #1  
Senior Member
Thread Starter
iTrader: (1)
 
thebeerbaron's Avatar
 
Join Date: Dec 2007
Location: San Jose
Posts: 658
Total Cats: 340
Default Convert cranking ms to pw %

I'm having trouble getting my MS2E started. It's been penguin-butt cold here, so I'm fighting a losing battle. I know the mantra is to just copy DIY's numbers, but their stuff is in milliseconds and the MS2 uses something called Pulse Width Percents.

I know PW% is related to the REQ_FUEL number, but does anyone know how? And how are the millisecond numbers for the MS1 related to REQ_FUEL, injector size, or what have you?

I'd really like to get this puppy to fire, any help would be appreciated!
thebeerbaron is offline  
Old 02-13-2008, 01:28 PM
  #2  
Elite Member
iTrader: (16)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 9,292
Total Cats: 475
Default

I modified the stock values slightly but anyway, this is what I'm running now. Granted it dosn't start right when it's freezing, but it eventually starts.

http://i231.photobucket.com/albums/ee155/patsmx5/pw.jpg
patsmx5 is offline  
Old 02-14-2008, 08:55 AM
  #3  
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,332
Total Cats: 67
Default

The cranking pulse width is equal to Req_Fuel (which is already in msec) times the percentage.
__________________
Matt Cramer
www.diyautotune.com
Matt Cramer is offline  
Old 02-14-2008, 10:26 AM
  #4  
Senior Member
Thread Starter
iTrader: (1)
 
thebeerbaron's Avatar
 
Join Date: Dec 2007
Location: San Jose
Posts: 658
Total Cats: 340
Default

Thanks guys!

Now why wouldn't the software do something useful like add the unit of measurement next to the Req_Fuel? It looks like some magic number without it.
thebeerbaron is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Frank_and_Beans
Supercharger Discussion
13
09-12-2016 08:17 PM
stoves
Suspension, Brakes, Drivetrain
5
04-21-2016 03:00 PM
interestedofold
Suspension, Brakes, Drivetrain
5
09-29-2015 01:42 PM
Greasyman
General Miata Chat
2
09-28-2015 10:44 AM


Thread Tools
Search this Thread
Quick Reply: Convert cranking ms to pw %



All times are GMT -4. The time now is 04:51 PM.