rev limiter adj - 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 05-21-2016, 04:14 PM   #1
Junior Member
Thread Starter
 
Join Date: Apr 2011
Location: Oregon
Posts: 278
Total Cats: 7
Default rev limiter adj

Is it advisable for a megasqirt novice to try to change up the rev limiter trackside? Im running out of gear way before braking zone. Id like to move it from 7k to 7400.
or, is it advissble to "drive" awhile on the soft rev cut?

2004msm, ms3
gtred is offline   Reply With Quote
Old 05-21-2016, 05:48 PM   #2
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,899
Total Cats: 1,792
Default

Doesnt the MSM have a reduced limiter compared to the rest?
Braineack is offline   Reply With Quote
Old 05-21-2016, 05:56 PM   #3
Elite Member
 
DNMakinson's Avatar
 
Join Date: Jan 2013
Location: Seneca, SC
Posts: 2,705
Total Cats: 269
Default

Quote:
Originally Posted by Braineack View Post
Doesnt the MSM have a reduced limiter compared to the rest?
Yes. Factory is 6500.
EDIT: removed "IIRC", because I had.
DNMakinson is online now   Reply With Quote
Old 05-21-2016, 06:00 PM   #4
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,109
Total Cats: 518
Default

Yeah I heard you're running without the chicane, probably should of upped that. I'd try 7200 for now. I wouldn't necessarily stay on the rev limiter.

but the tune is safe up there. But it's not the greatest for your tired engine.
curly is offline   Reply With Quote
Old 05-21-2016, 07:44 PM   #5
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,999
Total Cats: 1,466
Default

Holy ****, PIR without the chicane sounds ridiculous.

If it is a fuel cut limiter it is fine to sit on it. Spark cut could hurt it.
aidandj is offline   Reply With Quote
Old 05-21-2016, 07:51 PM   #6
Junior Member
Thread Starter
 
Join Date: Apr 2011
Location: Oregon
Posts: 278
Total Cats: 7
Default

Luckily the rain has come. Im sure i'll be carrying less speed. Nice tune curly... this thing runs strong!
gtred is offline   Reply With Quote
Old 05-21-2016, 08:31 PM   #7
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,109
Total Cats: 518
Default

It's spark and fuel
curly is offline   Reply With Quote
Old 05-21-2016, 08:32 PM   #8
SADFab Destructive Testing Engineer
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 17,999
Total Cats: 1,466
Default

I wouldn't sit on it for a long time. But hitting it shouldnt hurt too bad.
aidandj is offline   Reply With Quote
Old 05-22-2016, 01:26 AM   #9
Newb
 
drizzay222's Avatar
 
Join Date: Feb 2016
Location: Mobile, AL
Posts: 44
Total Cats: 0
Default

Another novice here working through MS setup. Is best for engine longevity to run spark then fuel cut? Just fuel? Will be hitting limiter during autocross.
drizzay222 is offline   Reply With Quote
Old 05-22-2016, 11:08 AM   #10
Junior Member
Thread Starter
 
Join Date: Apr 2011
Location: Oregon
Posts: 278
Total Cats: 7
Default

It's drying up for today's race. Im on the rev limiter for apprx the length of a football field (from the chicane to just after the hump). Im wondering if it'd be more damaging to feather it (and go closed loop\ lean?) Or,to just ride the soft cut?

I worry that if I go into TS and merely bump the limiter to 7400, that I might not have a fuel/spark map there... as it was only tuned to 7k. Is this how ir works?
gtred is offline   Reply With Quote
Old 05-22-2016, 12:23 PM   #11
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,109
Total Cats: 518
Default

It interpolates. So the last known value is still used. Since volumetric efficiency is lowering at higher rpm's, you only go a little rich.
curly is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
3 issues with Rev Built MS3-Basic 18psi MEGAsquirt 65 11-23-2017 07:16 AM
another 95 tach mystery - rev ms2 basic babydriver MEGAsquirt 7 04-09-2016 03:23 PM
New MS3Enhanced from Rev, general questions TheIglu MEGAsquirt 6 03-27-2016 07:37 PM
Ms3 Basic - Brake Pressure Sensor EErockMiata MEGAsquirt 9 03-04-2016 03:45 PM
Soft Rev Limit & Boost disney7 Hydra 11 09-03-2012 10:16 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 06:42 PM.