Megasquirt - Spark only - To emulate the mallory unilite...

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samcat
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Megasquirt - Spark only - To emulate the mallory unilite...

Post by samcat » Tue May 26, 2015 12:26 pm

Getting my head around everything before starting the install, as I am sure that will lead to a million and one questions! Figured a good starting point would be attempting to replicate the advance given by what is already installed in the car..
So, I am currently running a Mallory Unilite Optical dizzy, 2 grey springs, 12 degrees initial, 28 degrees max. NO vacuum advance.

The chart shows the effect of the various spring, this is in addition to the initial advance..
Image

This gives me this:
Image

Or as a table:
Image

As you can see I have done a slight 'kickup' below idle rpm, read that this is a good idea as it helps improve idle stability.


Can someone check my thinking through please, and please tell me if I am doing anything silly!

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Piledriver
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Re: Megasquirt - Spark only - To emulate the mallory unilite

Post by Piledriver » Tue May 26, 2015 1:01 pm

Reasonable starting point, but...
1) no need to have the table go down to 10 kpa. 30, maybe 40 with a cam.
Once that's done, multiply the bottom line x2 and then do a smooth scaling in two sections
(before and after the advance)

2) you appear to have a MS3. MS2e & MS3 have very useful idle timing and idle speed correction features that you should really use, so it should ~never see the main table at idle... but it does use that column for post cranking>idle area, it also effects how easy it is to stall. having more timing in the main map in the idle area can be a feature.
I, for one, regularly embrace our new robot overlords, as I am the guy fixing the robots...

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samcat
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Location: UK

Re: Megasquirt - Spark only - To emulate the mallory unilite

Post by samcat » Tue May 26, 2015 4:55 pm

Thanks!

Correct, I have the MS3X for full sequential using one of Marios cam Sync thingies.
Collecting my thoughts and planning it all out atm, so much to learn hence posting and sharing my learning.

The kpa is the default that TunerStudio presented, so just went with it.. Figured as I was just using rpm and ignoring MAP for now it wouldnt matter, and once its running I can see what the working range of MAP is.

Thanks for the input, gives me something further to go and read, which is exactly what I was after!

Oh for an idiots guide to getting started with spark only! :)

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