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

Hello all,


First of all: "Best wishes for 2010"!

Short introduction:
I'am Erik, from the Netherlands, Eindhoven, studying electronics and want to run my Ford Sierra '92 1600 on a MS-II v3.0! This because I have plans to build a supercharger on it .


Now, there are some questions unanswered:

1) A half year ago I see a car on a dyno with a MS and it was not passing the 5000 rpm. What is the maximum rpm MS-II can handle?

2) I want to keep my catalyst on my car because I've seen this great movie:
http://videos.howstuffworks.com/science ... -video.htm [03:02 min].
Will a low AFR, in combination with a WBL, destroy my cat?

3) How much power increment do you get? 10% 20%? I already did two dyno runs for reference.
And what about the efficiency? Is efficiency hanging together with more power? My 1600 runs on a EDIS with singlepoint. Doubting to build multipoint on it. Now it does 1liter on 9.5km (= 22.4 miles/gallon I guess).

4) Is it easy possible to make a rpm limiter in combination with my EDIS?

5) Are there European production cars with a WBL?

No more questions now.
I hope you guys can help me out!


Cheers!

Erikske wrote:
1) A half year ago I see a car on a dyno with a MS and it was not passing the 5000 rpm. What is the maximum rpm MS-II can handle?


3) How much power increment do you get? 10% 20%? I already did two dyno runs for reference.
And what about the efficiency? Is efficiency hanging together with more power? My 1600 runs on a EDIS with singlepoint. Doubting to build multipoint on it. Now it does 1liter on 9.5km (= 22.4 miles/gallon I guess).

4) Is it easy possible to make a rpm limiter in combination with my EDIS?

I can answer some of these questions:

1) MS is fitted to motorbikes that can do MUCH more rpms than your car will ever be capable of! Have a look at MS Success Stories.

3) Don't have unrealistic expectations ito how much more power you can get. If you car is tuned well as is, then you will not gain much power if any. However if your car is running excessively rich or lean (and according to your fuel consumption it is not) then you can expect power increase. You are more likely to gain fuel efficiency once you have it tuned well.

4) Yes, but with EDIS, rev limiting has its issues. You can only retard a max of 25 degrees (with B&G code) on timing. There are fuel related options too but I'm not familiar with those. MS documentation should describe that very clearly.

Hello Philip,

Thanks for your answers!

4) Yes, but with EDIS, rev limiting has its issues. You can only retard a max of 25 degrees (with B&G code) on timing. There are fuel related options too but I'm not familiar with those. MS documentation should describe that very clearly.

Then I guess the best option is to make later a own rev limiter system. Like shutting down 2 of the 4 spark plugs (as they do on motorcycles).

Regards

I'm quite sure that if you trigger MS directly off the trigger wheel, and modify the board for a second ignition output (for wasted spark), you can drive the coils directly with MS and then you do not need EDIS any more. Then , I believe, you can cut x sparks from Y trigger events - a "softer" form of limiting. I'm not sure what happens to fuel, so you might end up with a lot of unburnt fuel in the exhaust, just waiting to be set alight - with a bang!

Another approach (with EDIS) is to use 16x16 (or 12x12) tables and then sacrifice the last collumn or two for "Rev limiting" by retarding timing (and fuel??) enough to rob the engine of all power.