MSefi.com read only forum (Jan.15,2018)

Thanks for the reply, I have looked closer and the output number makes more sense.

I need some clarification on the cranking pulse width. What parameters effect the pulse width while you are in cranking mode? I have my cranking RPM set, and that shows up correct in the MLV ( it shows in cranking mode up to the correct rpm point). As far as the pulse width, I have my cranking PW fo...

Does anybody know if low Z injectors tend to be higher or lower for voltage compensation, or is there no correlation between the type of injectors?

Thanks, can you tell me what injector you are running? (Hi/Low Z, #/hr, style, etc.)

How did you determine that the compensation was 0.9?

If you search the threads for the synchromap topic you will find many posts on the problem with ITBs and a circuit that can be built to reduce them. There is also measured data from Bruce and others to back up the improvement that might be expected with this circuit. Thanks for the tip. Some things...

Yes, 8 throttle plates. i do not think i will go with straight alpha-N as if i were going to do that i would have just stuck with a mechanical injection, alpha N is just a mechanical setup with electronic injectors in function. There has to be a way to make it work with SD as kinsler and others make...

I need some feedback from some of you guys with tuning experience. I have a 406 SBC in my dragster with an pretty agressive cam. I am worried that it may be difficult to get it to idle with a SD control algorithm. Drag race only application, running on methanol, 120 lb/hr low Z injectors. This engin...

From reading the website, my understanding is that I use 18-20 gauge wires for everything going into the DB 37 pigtail when I make it. Is this correct? Is there a good reason to go to 18 ga, or is using a hi quality 20ga wire good enough? Also, what is the best way to combine wires? For example, if ...

Thanks for the info
I have looked into the palm log, I am sure it works good, I would just need to find the right palm to do the job. it looks like the older versions what you need.

Thats a good question.......... well, the cockpit of my car is 23 inches wide, wheelbase is 225" long with no suspension, and shakes hard when it does a burnout....... I guess i could mount it to the top of the cage??? I know, it seems silly to run a MS with a hi $$ datalogger, but what else do...

Is anybody using the racepack dashes or boxes to datalog with the Megasquirt II ? Just wondering if there is any compatiblily problems etc. Seems like a nice way to go if I can afford it

I assumed that it would be no problem as i have seen this done many times, it is the same principal just done in reverse, but i did not know if threre was anything different that I would need to do. Thanks

Thanks Matt, that answers my question. I have just heard some people have run into problems so i thought i would ask.

Matt Cramer wrote:By referencing the regulator to manifold pressure, it is better at maintaining a constant pressure drop across the injectors. .

Hmmmmm......... how does it do a better job at maintaining a constant pressure drop when vac referenced as opposed to not vac referenced??

I see that most fuel pressure regulators are vac/boost referenced, but some are not. I know that you can get more range out of the injectors if you vary the pressure, but if i plan to have a drag race (bracket race) specific application where consistency is important, will this just be adding a vari...

This is similar to what i had in mind......

I am working on a MS setup for a V8. My application is a little different from standard: 1.) It will be run on a mechanical pump on the front of the engine 2.) the gas tank will be in front of the engine So, my thoughts are to have the fuel flow out of the pump (on the front of the engine), split on...

I am designing my EFI system and am making my fuel lines from stainless. I would like to know what the minimum bend radius is (how tight they can be bent) before you start running into significant cavitation problems in the fuel system. This is a V8 with a fuel rail on each side of the intake that w...

Cougar69,
Did you determine why the idle is so high?