Go Back  Miata Turbo Forum - Boost cars, acquire cats. > Performance & Tuning > ECUs and Tuning > MEGAsquirt
Reload this Page >

Any pointers for making my enrichment and overrun settings not suck

MEGAsquirt A place to collectively sort out this megasquirt gizmo
Sponsored by:
Sponsored by:

Any pointers for making my enrichment and overrun settings not suck

 
Old 08-02-2018, 05:34 PM
  #1  
Newb
Thread Starter
 
Join Date: Oct 2017
Posts: 37
Total Cats: 0
Default Any pointers for making my enrichment and overrun settings not suck

First off I am pretty noob at Mega Skeet tuning and have been trying to learn slowly how to get my MKturbo NB running at it's full potential. I've gone back and fourth between Brain's and DIY's base tune and landed somewhere in between the two. Can you guys have a look at my enrichment AP scales/table and overrun settings and suggest areas that need improvement. (It needs a lot) I know the whole VE table is now rich since I messed with the AP settings, but just trying to get the tip-in and overrun stuff dialed, then hopefully I can move on to all the AE setting and play with EAE, wall wetting, etc. Thanks much for any input.

P.S. Any Miata Megasquirt tuners in Atlanta, GA y'all can recommend? Or even remote tuning services offered by one of you guys?
Attached Files
File Type: msq
CurrentTune.msq (285.5 KB, 15 views)
File Type: msl
2018-08-02_16.39.34.msl log.msl (1,000.6 KB, 11 views)
SA58Junkie is offline  
Old 08-03-2018, 01:07 AM
  #2  
Junior Member
 
Join Date: Feb 2018
Posts: 72
Total Cats: 1
Default

18psi seems to be the go-to for remote tuning but I think there's a pretty good backlog of people waiting
mj1176 is offline  
Old 08-03-2018, 08:15 AM
  #3  
Elite Member
iTrader: (6)
 
Join Date: Feb 2013
Location: Staunton, Va
Posts: 3,159
Total Cats: 382
Default

How the hell did you end up with a mix of base tunes?

usually you use a base to get, well, a base to start from. Then you begin tuning.

I dont know what enrich AP is.
ryansmoneypit is offline  
Old 08-03-2018, 10:09 AM
  #4  
Design Engineer
iTrader: (1)
 
DNMakinson's Avatar
 
Join Date: Jan 2013
Location: Seneca, SC
Posts: 3,512
Total Cats: 468
Default

This should still be relevant

You will get swings in AFR when quickly lifting throttle and going into over-run. I have tried to work on that but it is hit or miss. I think the reason is that the actual, exact total wall wetted volume is so sensitive to little changes in things like MAT and manifold wall temperature, that sometimes the puddle will be exhausted, and other times not, in seemingly identical conditions. Drive-ability will not suffer.
DNMakinson is offline  
Old 08-03-2018, 10:29 AM
  #5  
Junior Member
 
Mudflap's Avatar
 
Join Date: May 2017
Location: Louisville, Co
Posts: 293
Total Cats: 72
Default

My experience is that you keep adjusting it this way and that. And after many months of farting around with it, you get used to what you land on and you give up. To all Skeet Skeet Skeet!!
Mudflap is offline  
Old 08-03-2018, 10:41 AM
  #6  
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,769
Total Cats: 676
Default

Tips: set any values below 100% on your air density table to 100%. Remember AE isa percentage of your fuel table, so bring the RPMs up really slowly with idle valve test mode, and tweak your fuel table until AFRs look good. Over run cut is another fuel setting you want to disable until the fuel table is dialed, so just shut it off for now. It's probably causing a lot of bucking.

And who's base map has the fuel trim enabled? I wouldn't mind seeing the data that came up with those numbers.
curly is offline  
Old 08-03-2018, 06:26 PM
  #7  
Newb
Thread Starter
 
Join Date: Oct 2017
Posts: 37
Total Cats: 0
Default

Originally Posted by curly View Post
Tips: set any values below 100% on your air density table to 100%. Remember AE isa percentage of your fuel table, so bring the RPMs up really slowly with idle valve test mode, and tweak your fuel table until AFRs look good. Over run cut is another fuel setting you want to disable until the fuel table is dialed, so just shut it off for now. It's probably causing a lot of bucking.

And who's base map has the fuel trim enabled? I wouldn't mind seeing the data that came up with those numbers.
Thanks for the tip Curly. I went ahead and changed those values in my air density table up to 100% and I'll see if there is any improvement when I burn to controller. I always wondered why the VE table was so far off during an AutoTune session between when I go to work at 5:30am (high 60's) and when I come home at 4:00pm (low-mid 90's) Is that due to the air density settings being off?

Not too much bucking going on, only occasionally when the load is ever so light enough, it will. I turned the fuel cut trim on myself in hopes of getting the hellacious decel backfire to go away that I am getting pretty consistently. It seemed to help a small amount, but is still definitely a problem.
SA58Junkie is offline  
Old 08-03-2018, 06:36 PM
  #8  
Newb
Thread Starter
 
Join Date: Oct 2017
Posts: 37
Total Cats: 0
Default

Originally Posted by DNMakinson View Post
This should still be relevant

You will get swings in AFR when quickly lifting throttle and going into over-run. I have tried to work on that but it is hit or miss. I think the reason is that the actual, exact total wall wetted volume is so sensitive to little changes in things like MAT and manifold wall temperature, that sometimes the puddle will be exhausted, and other times not, in seemingly identical conditions. Drive-ability will not suffer.
Wow that is a lot of great information in that thread, thank you. I only just browsed through it, but will most certainly give it an extensive look and hopefully apply something to my own controller in hopes of getting my tune in better shape.

Its funny though and may be someone can comment, but I just watched a Megasquirt training video with "expert", Matt Happel and he doesn't even screw with EAE, wall wetting, etc.. He just gets the VE table highly refined and adjusts the AP enrichments and calls it a day. How much better did your car run after getting these settings dialed? Night and day difference? I'm certainly not questioning anyone's abilities here, I'm just more curious than anything.
SA58Junkie is offline  
Old 08-03-2018, 06:39 PM
  #9  
Newb
Thread Starter
 
Join Date: Oct 2017
Posts: 37
Total Cats: 0
Default

Originally Posted by ryansmoneypit View Post
How the hell did you end up with a mix of base tunes?

usually you use a base to get, well, a base to start from. Then you begin tuning.

I dont know what enrich AP is.
Oh sorry maybe I was referring to it wrong or using incorrect terminology, but I was talking about the Accelerator Pump settings in the enrichment tab.
SA58Junkie is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
IcantDo55
Engine Performance
7
02-24-2016 05:18 PM
Twodoor
Suspension, Brakes, Drivetrain
50
09-19-2014 03:31 PM
skinny
MEGAsquirt
16
06-13-2011 04:18 PM
TurboTim
Insert BS here
8
08-05-2010 11:58 PM


Thread Tools
Search this Thread
Quick Reply: Any pointers for making my enrichment and overrun settings not suck


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.