new boost spike - Page 4 - 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 05-28-2013, 09:31 PM   #61
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

Why is ur **** so lean?
triple88a is offline   Reply With Quote
Old 05-29-2013, 07:01 AM   #62
Junior Member
Thread Starter
 
Join Date: Sep 2011
Location: Chesterfield, VA
Posts: 252
Total Cats: 2
Default

Here are my afr targets, ve, and a scatter plot of one 1st-3rd pull.
Attached Thumbnails
new boost spike-afr_targets.jpg   new boost spike-ve.jpg   new boost spike-scatter_plot.jpg  
travisb is offline   Reply With Quote
Old 05-29-2013, 08:47 AM   #63
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

+12.5afr at 8 psi is way too lean. See most of ur scatter plot is well above 12afr just like ur log few posts back. Richen that bad boy up.
triple88a is offline   Reply With Quote
Old 05-29-2013, 09:45 AM   #64
Elite Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Granbury, TX
Posts: 6,010
Total Cats: 583
Default

Travis, AFR targets are only used by MS in certain operational areas (where you've given permission -- almost never in boost) and only to a certain authority. AFR targets are also used by VEA/VEAL to tune your VE table. Tuning the VE table is an iterative process. Your VE table is out of tune right now. Better do some tuning, because you're going to hurt your engine with what you have now.

Bottom line, AFR table is a secondary control (maybe "suggestion" is a better word). Your engine runs off the VE table.
hornetball is offline   Reply With Quote
Old 05-29-2013, 10:33 AM   #65
Junior Member
Thread Starter
 
Join Date: Sep 2011
Location: Chesterfield, VA
Posts: 252
Total Cats: 2
Default

Ok. I thought my tune was pretty good. I use VEAL a couple times a month.

Attached are my tune and partial log from this morning, along with a scatter plot and some screen shots of VE and spark tables.

I understand the engine runs off the VE table. I thought VEAL used AFR targets to get the VE table.

Is my AFR target table off and that is making a bad VE table?

Between 100-125 kpa, most of the points are between 11.7 -13.2 AFR. Above 125kpa most are between 12.5-11.3 AFR. There are occasional single points that are higher, but I just took those to be random occurrences that are probably acceptable.

What should my goal numbers be?
Attached Thumbnails
new boost spike-20130529_scatter.jpg   new boost spike-20130529_ve.jpg   new boost spike-20130529_ve_3d.jpg   new boost spike-20130529_spark.jpg   new boost spike-20130529_spark_3d.jpg  

new boost spike-20130529_veal.jpg  
Attached Files
File Type: msq travisb_2013-05-29_08.02.27.msq (40.4 KB, 50 views)
File Type: msl travisb_2013-05-29_07.32.04.msl (1.82 MB, 60 views)
travisb is offline   Reply With Quote
Old 05-29-2013, 11:40 AM   #66
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

Tthe afr table is basically a wish list however your engine runs off of the ve table. I dont know how veal tunes since i run adaptronic however there is a time period where it cannot tune the table in a couple of runs or whatever, it takes time, time that is dangerous and can hurt your engine. That is when you take matter into your own hands and increase the ve manually. I'm not sure if VEAL even tunes in boost.
triple88a is offline   Reply With Quote
Old 05-29-2013, 11:50 AM   #67
Elite Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Granbury, TX
Posts: 6,010
Total Cats: 583
Default

Quote:
Originally Posted by travisb View Post
I understand the engine runs off the VE table. I thought VEAL used AFR targets to get the VE table.
Correct.

Quote:
Originally Posted by travisb View Post
Is my AFR target table off and that is making a bad VE table?
Your AFR table looks decent.

The concern is that the logged pulls from earlier (Post #60) were showing a pretty consistent ~12.5:1 in boost (i.e., does not match your AFR table). Additional VE tuning, concentrating in the boost areas, should fix this.
hornetball is offline   Reply With Quote
Old 05-29-2013, 02:25 PM   #68
Junior Member
Thread Starter
 
Join Date: Sep 2011
Location: Chesterfield, VA
Posts: 252
Total Cats: 2
Default

edited

Last edited by travisb; 05-29-2013 at 06:36 PM.
travisb is offline   Reply With Quote
Old 05-30-2013, 08:19 AM   #69
Junior Member
Thread Starter
 
Join Date: Sep 2011
Location: Chesterfield, VA
Posts: 252
Total Cats: 2
Default

I think it is getting better. Check out the attachments below.

Each image has a yellow horizontal line at 12.5 AFR and a blue horizontal line at 10.5 AFR.

The first image is from a couple days ago. The last three are from this morning.
Attached Thumbnails
new boost spike-20130528_01.jpg   new boost spike-20130530_01.jpg   new boost spike-20130530_02.jpg   new boost spike-20130530_03.jpg  
travisb is offline   Reply With Quote
Old 05-30-2013, 08:48 AM   #70
Junior Member
Thread Starter
 
Join Date: Sep 2011
Location: Chesterfield, VA
Posts: 252
Total Cats: 2
Default

Attached is a comparison of my VE table from 5/28 and 5/30. I gave VEAL more authority and eased the cell change resistance from hard to normal.
Attached Thumbnails
new boost spike-ve_compare.png  
travisb is offline   Reply With Quote
Old 05-30-2013, 10:48 AM   #71
Elite Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Granbury, TX
Posts: 6,010
Total Cats: 583
Default

That's all there is to it.
hornetball is offline   Reply With Quote
Old 05-30-2013, 09:52 PM   #72
Elite Member
iTrader: (2)
 
triple88a's Avatar
 
Join Date: Apr 2006
Location: Chicago, IL
Posts: 9,131
Total Cats: 598
Default

Thats the spirit, thats beautiful.
triple88a is offline   Reply With Quote
Old 08-19-2013, 07:46 PM   #73
Junior Member
 
Join Date: May 2011
Location: Central Kentucky
Posts: 221
Total Cats: 1
Default

I am having a boost spike issue much like you have here. It's on a godspeed 48 trim, trying to spike to 15 psi or so. Where did you buy the new actuator?
Oochi is offline   Reply With Quote
Old 08-20-2013, 09:44 AM   #74
Junior Member
Thread Starter
 
Join Date: Sep 2011
Location: Chesterfield, VA
Posts: 252
Total Cats: 2
Default

Quote:
Originally Posted by Oochi View Post
I am having a boost spike issue much like you have here. It's on a godspeed 48 trim, trying to spike to 15 psi or so. Where did you buy the new actuator?
I bought it from BEGi. Link - 7 psi Turbo Actuator, 48009-9
travisb is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 59 Yesterday 09:00 PM
LucaCarMods's Boosted Dutch Miata Build! LucaCarMods Build Threads 11 02-14-2016 07:13 AM
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
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 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 04:47 PM.