Timing settings - 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 04-03-2009, 11:53 AM   #1
Newb
Thread Starter
 
Join Date: Sep 2008
Location: UK
Posts: 39
Total Cats: 0
Default Timing settings

My engine is currently running on the 14 degrees btdc because thats the common mod on the stock ecu for a little more power/torque. Do i need to reset the timing to 10 degrees for fitting the megasquirt? I know there are a lot of timing options within the MS, can i just leave my current timing and tweak the settings to take this into account?

The car is a 94 1.8 (and as you may have guessed, i dont have easy access to a timing gun)
Seal is offline   Reply With Quote
Old 04-03-2009, 12:24 PM   #2
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,833
Total Cats: 1,786
Default

you have to ensure the MS and the CAS are synced.

The MS takes over control of your timing. So you can idle at 10-12-14-16-18 with the push of a button, if you turn the CAS once you are running MS, you'll have to teach the MS the new position. So it is vital that you do the initial setup correctly.
Braineack is offline   Reply With Quote
Old 04-03-2009, 12:33 PM   #3
Senior Member
iTrader: (4)
 
Join Date: Jan 2008
Location: Falls Church, VA
Posts: 1,367
Total Cats: 16
Default

You can skip readjusting the CAS and still accomplish the goal of the car actually running the timing that MS thinks it's running. However, regardless of whether you had base timing at 14 or 10 before, you'll have to tweak trigger angle settings in Megatune to get the MS matched up perfectly to the car. You cannot do this without a timing light.

Last edited by ScottFW; 04-03-2009 at 12:40 PM. Reason: redundant info removed
ScottFW is offline   Reply With Quote
Old 04-03-2009, 12:45 PM   #4
Elite Member
iTrader: (3)
 
Mach929's Avatar
 
Join Date: Oct 2004
Location: lansdale PA
Posts: 2,500
Total Cats: 0
Default

you can't just run 14 degrees timing is ms, it's a whole map, whole different animal

edit: reread your question, you could do it but why? setup ms the way it's supposed to be
Mach929 is offline   Reply With Quote
Old 04-03-2009, 01:04 PM   #5
Senior Member
iTrader: (4)
 
Join Date: Jan 2008
Location: Falls Church, VA
Posts: 1,367
Total Cats: 16
Default

I think what he was asking was whether he could just install MS and somehow tell MS that the base timing is 14, without adjusting anything else and without a timing light, and have everything run hunky dory. Heretofore unbeknownst to the OP but beknownst to us, the answer is of course NO.
ScottFW is offline   Reply With Quote
Old 05-06-2009, 04:58 PM   #6
Newb
 
Join Date: Apr 2009
Posts: 25
Total Cats: 0
Default

Quote:
Originally Posted by Seal View Post
My engine is currently running on the 14 degrees btdc because thats the common mod on the stock ecu for a little more power/torque. Do i need to reset the timing to 10 degrees for fitting the megasquirt? I know there are a lot of timing options within the MS, can i just leave my current timing and tweak the settings to take this into account?

The car is a 94 1.8 (and as you may have guessed, i dont have easy access to a timing gun)
Will you then have to retune for the new timing? I did the same thing. I synched the MS and the CAS in the Spark setting just like on the video DIY put out. Then in dawned on me that the spark map will have an additional 14 degrees of advance in the mix after I spent a lot of time at the dyno tuning my fuel map. I'm new to tuning and am eager to learn but sometimes **** happens. I'm ready for any answers or flames sent my way.

PS: I do have a timing light and I'm not afraid to use it.
JohnW8 is offline   Reply With Quote
Old 05-06-2009, 05:24 PM   #7
Elite Member
iTrader: (1)
 
Join Date: Jun 2006
Location: Warrington/Birmingham
Posts: 2,658
Total Cats: 39
Default

Quote:
Originally Posted by Seal View Post
My engine is currently running on the 14 degrees btdc because thats the common mod on the stock ecu for a little more power/torque. Do i need to reset the timing to 10 degrees for fitting the megasquirt? I know there are a lot of timing options within the MS, can i just leave my current timing and tweak the settings to take this into account?

The car is a 94 1.8 (and as you may have guessed, i dont have easy access to a timing gun)
Mate, when you installed your MS, you should have sync'd the MS to the engines actual timing, this is done by either adjusting the CAS until a timing light shows the same timing as the MS does, OR by adjusting the trigger angle in MegaTune/TunerStudio.

FWIW, when I first installed mine, I forgot to do this and drove around for a month before realising. I was n/a, and no harm was done, but it's NOT recommended!

Gimmie a bell if you need talking through the process
richyvrlimited is offline   Reply With Quote
Old 05-06-2009, 07:28 PM   #8
Senior Member
iTrader: (4)
 
Join Date: Jan 2008
Location: Falls Church, VA
Posts: 1,367
Total Cats: 16
Default

Quote:
Originally Posted by JohnW8 View Post
Will you then have to retune for the new timing? I did the same thing. I synched the MS and the CAS in the Spark setting just like on the video DIY put out. Then in dawned on me that the spark map will have an additional 14 degrees of advance in the mix after I spent a lot of time at the dyno tuning my fuel map. I'm new to tuning and am eager to learn but sometimes **** happens. I'm ready for any answers or flames sent my way.

PS: I do have a timing light and I'm not afraid to use it.
If you used a timing light and got MS synced properly with the timing marks on the front of the engine, then after you finished adjusting the trigger angle you set the timing field back to -10 (which tells MS to use the 12x12 spark table), then you're good to go and are running whatever timing the map in MS is telling it to run.

The only way you would have a blanket addition of timing across the board is if you told MS to give you 10 while you were syncing it up but used the 14 mark on front of the engine, or something like that, then in actuality the engine would be running 4 more advanced everywhere compared to what the 12x12 table says.
ScottFW is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
TunerStudio timining issue - 90 Miata 1.6 Turbo spec1sef MEGAsquirt 28 05-09-2017 08:03 AM
TTE Build - Help me pick tires chrisn Race Prep 27 10-16-2015 06:12 PM
Cannot set Base Timing to 10* Elfering MEGAsquirt 50 10-05-2015 09:04 AM
DIYPNP Won't Stay Running huesmann MEGAsquirt 19 09-16-2015 08:11 PM
ME221 Now has Autotune and Long Term Fuel Trim Tables Motorsport-Electronics ECUs and Tuning 0 09-05-2015 09:02 AM


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 04:31 AM.