RPM/MAP based accel enrichments. What do these numbers mean? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 11-27-2011, 08:07 PM   #1
Elite Member
Thread Starter
iTrader: (4)
 
MartinezA92's Avatar
 
Join Date: Aug 2009
Location: Mountain View, CA
Posts: 1,702
Total Cats: 28
Default RPM/MAP based accel enrichments. What do these numbers mean?

A couple things first:
1. No vTPS
2. 460 cc injectors
3. I have a VERY basic understanding of what I'm doing
4. I don't even know what some of the values in these tables do.

I understand the numbers under MAP based AE, and I've been messing with them the past couple days to try to cure my slight hesitation/lean spikes. It's just a matter of getting them right, however I need to know what to aim for. What kind of numbers should I be seeing on my wideband when I run through this chart? Right now if I just sit somewhere and tap the throttle, I see about 18:1. Right now it looks like this:

kPa/s PW adder
80 2.9
140 4.5
210 5.8
300 7.3

I had the first number up to almost 5 ms and I was still seeing a lean spike. I just left it at 2.9 which is still a huge improvement over where it was a week ago. Am I just messing with these until it FEELS right? If so, I'm pretty much done.

As far as I can see, I'm actually using rpm enrichments, which if I'm understanding correctly, is augmenting MAP enrichment, not replacing it. If I hold rpm at about 5000 and then stomp it, I feel no hesitation but I see a lean spike in my wideband. This scares me a little. Do these RPM enrichment numbers look off to anyone? Again, I need to know what AFR's I should be looking for.

And lastly, I set MAPdot threshold to 20, it was originally at 50, and I noticed an improvement. I set accel time to 0.2 ms, it was originally at 0.5. What exactly am I doing here? I'm under the impression that it won't react to changes under 20 kPa/s, but I figured I'd make sure.
Attached Thumbnails
RPM/MAP based accel enrichments. What do these numbers mean?-accelenrich.jpg  
MartinezA92 is offline   Reply With Quote
Old 12-17-2011, 03:52 PM   #2
Elite Member
Thread Starter
iTrader: (4)
 
MartinezA92's Avatar
 
Join Date: Aug 2009
Location: Mountain View, CA
Posts: 1,702
Total Cats: 28
Default

No one?
MartinezA92 is offline   Reply With Quote
Old 12-19-2011, 12:10 PM   #3
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,266
Total Cats: 51
Default

IIRC, RPM based accel enrich replaces the standard accel enrich instead of being added.
Matt Cramer is offline   Reply With Quote
Old 12-30-2011, 06:36 PM   #4
Senior Member
iTrader: (2)
 
Join Date: Aug 2010
Posts: 639
Total Cats: 2
Default

i too would REALLY like to know the answers to these questions
or at least be linked to a good tutorial as i also have a 1.6 miata no vTPS
i have megasquirted it last summer in preparation for turbo
it is now stored up for the winter
and i could not get the lean spikes on accel to go away before i put it up

and i wont turbo it until i get that taken care of
jared8783 is offline   Reply With Quote
Old 01-02-2012, 11:50 AM   #5
Supporting Vendor
 
Matt Cramer's Avatar
 
Join Date: Sep 2006
Posts: 2,266
Total Cats: 51
Default

Quote:
Originally Posted by jared8783 View Post
i too would REALLY like to know the answers to these questions
or at least be linked to a good tutorial as i also have a 1.6 miata no vTPS
i have megasquirted it last summer in preparation for turbo
it is now stored up for the winter
and i could not get the lean spikes on accel to go away before i put it up

and i wont turbo it until i get that taken care of
If you have a DIYPNP, settings for an MS1 won't matter - MS2's acceleration enrichment is different. It has a built in RPM based taper setting.
Matt Cramer is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
In need of base map for stock 1997 brandonbkd MEGAsquirt 0 09-29-2015 12:52 AM
Recommended Tire Temp for best friction thumpetto007 Race Prep 4 09-27-2015 06:16 PM
VE values too low? compuw22c MEGAsquirt 4 09-12-2015 08:42 PM


Thread Tools

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 01:40 AM.