Notices
MEGAsquirt A place to collectively sort out this megasquirt gizmo

Anyone using Cranking Taper Curve on MS3? Reasonable Values

Thread Tools
 
Search this Thread
 
Old Dec 8, 2018 | 11:55 AM
  #1  
fwman1's Avatar
Thread Starter
Junior Member
iTrader: (3)
 
Joined: Mar 2008
Posts: 149
Total Cats: 5
From: Alabama
Default Anyone using Cranking Taper Curve on MS3? Reasonable Values

I don't know how often folks in the Miata community use this feature and was wondering what values others use, if they use it at all.

I started with a spread of 100% evenly spaced to 75% after 120 events. Seems to work reasonably well.
Thoughts?
Thanks
​​​​​​(​Running 1.5.1)
Old Dec 8, 2018 | 01:15 PM
  #2  
DNMakinson's Avatar
Elite Member
iTrader: (3)
 
Joined: Jan 2013
Posts: 5,030
Total Cats: 861
From: Seneca, SC
Default

Running 1.4.0
Played with it. It was not useful. At 200 RPM, there are 6.6 events per second. A well set-up start cycle takes 2 seconds or less. I don’t think you’re doing anything anyway.

I do use primiing pulse to wet the intake walls so the cranking pulses actually get into the cylinders.
Old Dec 8, 2018 | 02:01 PM
  #3  
fwman1's Avatar
Thread Starter
Junior Member
iTrader: (3)
 
Joined: Mar 2008
Posts: 149
Total Cats: 5
From: Alabama
Default

Thanks. That is good info. I guess I should have said, it didn't seem to hurt anything. I just played with it this morning since it was colder here.
A quick follow up please. The number of events at 200 RPM, how did you determine this info? Is there a field in MLV that I can reference?
I didn't see one labeled 'events'.

I appreciate the replies. Thank you.
Old Dec 8, 2018 | 02:20 PM
  #4  
DNMakinson's Avatar
Elite Member
iTrader: (3)
 
Joined: Jan 2013
Posts: 5,030
Total Cats: 861
From: Seneca, SC
Default

As I understand it, an event is a coil firing. 200 Rev / min * (1 min / 60 seconds) = 3.333 revs / sec.
4 cyl, 4 cycle engine sparks 2 times per revolution, so 6.6 events per second.
Old Dec 8, 2018 | 03:33 PM
  #5  
Ted75zcar's Avatar
Tweaking Enginerd
iTrader: (2)
 
Joined: Mar 2013
Posts: 1,873
Total Cats: 383
From: Boulder, CO
Default

I use it to good effect with e85 and cold starts. Tapers from 1 event to 6 events and then done. Acts as a second priming pulse sort of.

starting an e85 car at 15F encourages one to explore all of the *****.
Old Dec 8, 2018 | 04:04 PM
  #6  
DNMakinson's Avatar
Elite Member
iTrader: (3)
 
Joined: Jan 2013
Posts: 5,030
Total Cats: 861
From: Seneca, SC
Default

Understood, Ted.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
wherestheboost
MEGAsquirt
6
Feb 5, 2019 08:57 PM
1stgen<3
MSPNP
48
Dec 14, 2018 04:18 PM
94mx5red
MEGAsquirt
45
Dec 8, 2012 05:43 PM
Reverant
MEGAsquirt
1
Mar 28, 2011 05:59 PM
Enginerd
MEGAsquirt
3
Mar 16, 2011 07:59 PM




All times are GMT -4. The time now is 07:31 PM.