Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

> Megasquirt Injection Control setting, what did you use?
yarin
post Apr 6 2006, 07:40 AM
Post #1


'14-X'in FOOL
***

Group: Members
Posts: 988
Joined: 13-May 03
From: Guttenberg, NJ
Member No.: 693
Region Association: North East States



I'm going to crank the car tonight but I want to make sure i have my baseline settings correct.

(IMG:http://www.megasquirt.info/ms2/MT_injector2.GIF)

Installing MS II V3.0 on a '73 2.0 (4cyl, port injection, 4 injectors, low impedence injectors, speed density). My required fuel came out to be around 13. (122 cubic inch, 4 inj, 24 lbs/hr) Stock 2.0 injectors, plenum, runners.

Do I want 2 or 4 Injections per cycle?

Injections per Engine Cycle is set the number of squirts you want per engine cycle. You want this to be set so that your idle pulse width is no less than 2.0 ms, if possible, and your Req_Fuel is less than 15-18 milliseconds, but more than 6 milliseconds. These values allow proper tuning of the idle mixture while maintaining the ability to apply enrichments (acceleration, warm-up, etc.) under full throttle. This is the total injector events that you wish to occur for every engine cycle (360 degrees for two stroke engines and 720° for four strokes.


What about injector staging? Alternating or Simultaneous? (alternating is my guess)
Even fire or odd fire? (i say even fire according to MS II documentation)

Do I setup my injector banks as follows?

INJ1 - Cyl 1, 3
INJ2 - Cyl 2, 4

This is the firing order of the dizzy:
(IMG:http://www.914world.com/bbs2/uploads/post-2-1120702620.jpg)
i believe the dizzy numbering is incorrect but the sequence is right.

I plugged into the calculator here:
http://www.megasquirt.info/v22manual/mfuel.htm
Disp 122 cubic inch, 4 cyl, 4 inj, 4 squirts, 24 lbs/hr, alternating, gas.

That gave me Req Fuel of 13.3ms and downloaded req fuel of 6.7. This satisfies the required fuel range above of 6-15ms. So are these settings acceptable?

Thanks
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
Reply to this topicStart new topic
Replies
crash914
post Apr 6 2006, 03:45 PM
Post #2


its a mystery to me
***

Group: Members
Posts: 1,830
Joined: 17-March 03
From: Marriottsville, MD
Member No.: 434
Region Association: MidAtlantic Region



ummmmmm....

I am using the negative side of the coil...no problems.

I am using the mechanical advance for the spark advance.

if you aren't going EDI, it work ok with the stock dizzy....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

Posts in this topic


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 9th May 2025 - 12:18 PM