Idle pulse width calculation - 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 05-24-2009, 01:38 AM   #1
Newb
Thread Starter
 
Join Date: Jan 2008
Location: chicago
Posts: 4
Total Cats: 0
Default Idle pulse width calculation

Hello all, I have been reading here for quite awhile and finally have to ask a question. In preparation for MSPNP and 12P.S.I. I need to choose injector size, but I have concern about idle pulse width. In the Mega Manual the calculation Req fuel x VE x Map + Inj opening time results in lower than recomended idle pulse widths. Using 5.8 for req fuel for 600cc and 7.6 for 460cc injectors as calculated from Mega Tune here is what I come up with.
5.8 x 30% x 30/100 + 1.0= 1.52 or...
7.6 x 30% x 30/100 + 1.0= 1.68 Both lower than the 1.7 they advise. The Map and KPA are estimates from the manual. Is my math skewed? Most seem to run 550cc but idle quality is seldom mentioned as being a problem. Thanks for looking.
mnelson is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Momo Supercup seat jpreston Miata parts for sale/trade 2 05-17-2016 01:51 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
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
why is my car running like pewp? (tune/datalog) itsMikey MSPNP 3 09-28-2015 07:40 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 01:03 PM.