The MegaSquirt Project has experienced explosive growth other the years, with hundreds of new MS installations occurring every week - a phenomenal success! MegaSquirt has been successfully used in all aspects of Internal Combustion engine applications including R&D, Industry, Race, and Research. The MS project has transformed itself from a simple R&D project into a full-featured mature engine control system. To reflect this the support structure has also changed to meet the needs of MegaSquirt Users.
Moving forward, the R&D forums for MegaSquirt project are in a read-only mode - no new forum posts are accepted.
However the forums will remain available for view, they still contain a wealth of information on how MegaSquirt works, how it is installed and used. Feel free to search the forums for information, facts, and overview.While the R&D forum traffic has slowed in recent years, this is not at all a reflection of Megasquirt users, which continue to grow year after year. What has changed is that the method of MegaSquirt support today has rapidly moved to Facebook, this is where the vast majority of interaction is happening now. For those not on Facebook the msextra forums is another place for product support. Finally, for product selection assistance, all of the MegaSquirt vendors are there to help you select a system, along with all of the required pieces to make it complete.
Forum rules Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
Im curious as to what my req fuel should be. I have it set at 16.6 right now an have been driving the car for quite a while. However, I am using a narrow band o2 and cannot get the car to idle around the stoich area. My sensor reads around .8 to .91. If I try to lean it out the engine just sputters then hunts and wants to die. I am unable to get a leaner mixture with my current settings. The car has a turbo an under boost I never see it go lean unless I am under decel. I know a NB sensor is not the ideal way to tune but at the moment thats all I am able to use. WB is in the very near future.
Most batch fire cars like to run a little bit rich at idle. Required Fuel is simply a base pulse width that is multiplied by the VE percent; changing the VE would accomplish the same thing.
I can understand that but does this seem like a reasonable number for a 2000cc engine? When you use the calculator in megatune the numer that it gives to start with is 6.7.
Remember that the req_fuel number is cut in half if you run simultaneous instead of alternating.
FWIW: My req_fuel is 9.6 running a turbo ACVW, and burning E85. I'm set at simultaneous as well.
Sandrail-ACVW 2276 cc, Turbo
MS-II W/spark burning E85
The sand must be punished.