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Old 11-15-2016, 10:53 AM   #1
Kershaw
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Launch control in MS

So, setting it up appears easy at first. Hold down clutch, 3500rpm brahbrabrah, let go of clutch. Awesome. Then I shift to second and I hit 3500rpm and it cuts it there too. What. That's not what I wanted. I don't see anything in the launch control table that allows you to select by gear, and I'm not sure how MS would even know that. Google and the help doc didn't prove useful. Perhaps I'm searching the wrong things.

I kept all the settings except RPM stock, I changed it to 3500 from 4000.
Input PE0/JS7
Launch Hard Limit 3500
Soft Limit zone 200
Soft Limit Retard 1.00
Enable launch when TPS Above 10%
Limiter Method Spark Cut

Ideas? What am I doing wrong?
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My professional opinion is the iX is the most hateful breed of E30.
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Old 11-15-2016, 12:16 PM   #2
ak-
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Quote:
Originally Posted by Kershaw View Post
So, setting it up appears easy at first. Hold down clutch, 3500rpm brahbrabrah, let go of clutch. Awesome. Then I shift to second and I hit 3500rpm and it cuts it there too. What. That's not what I wanted. I don't see anything in the launch control table that allows you to select by gear, and I'm not sure how MS would even know that. Google and the help doc didn't prove useful. Perhaps I'm searching the wrong things.

I kept all the settings except RPM stock, I changed it to 3500 from 4000.
Input PE0/JS7
Launch Hard Limit 3500
Soft Limit zone 200
Soft Limit Retard 1.00
Enable launch when TPS Above 10%
Limiter Method Spark Cut

Ideas? What am I doing wrong?
Did you get your megasquirt from DIYPNP or Keith 'Whodwho'?
I had this issue too and resolved it by putting a switched fused 12v to the pin instead of grounding it.

DIYPNP has you ground the pin(and every tutorial on the web for MS). Keith's needs a 12v source instead.

My settings are:
Launch Hard Limit 3400
Soft Limit zone 100
Soft Limit Retard -5
Enable launch when TPS Above 20%
Limiter Method Spark Cut
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Old 11-15-2016, 12:21 PM   #3
Kershaw
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Derek @ dederic motorsports, but I'll look into that. Thanks.

Edit: After your comment and a bit of research I'm starting to understand what's going on. When the clutch is up, the signal is still grounded. I think they may be set up the same. Where did you tap your switched power, the ignition?
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Originally Posted by ELVA164 View Post
My professional opinion is the iX is the most hateful breed of E30.

Last edited by Kershaw; 11-15-2016 at 12:49 PM.
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Old 11-15-2016, 12:24 PM   #4
ak-
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Quote:
Originally Posted by Kershaw View Post
Derek @ dederic motorsports, but I'll look into that. Thanks.
Cool. Are you using a momentary switch btw?
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Old 11-15-2016, 09:50 PM   #5
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Quote:
Originally Posted by Kershaw View Post
Derek @ dederic motorsports, but I'll look into that. Thanks.

Edit: After your comment and a bit of research I'm starting to understand what's going on. When the clutch is up, the signal is still grounded. I think they may be set up the same. Where did you tap your switched power, the ignition?
LC activates when the signal is grounded.

I forget what it's actually called, but I have a fused wire going to the terminal where the battery box is behind the passenger shock tower (not switched, but works I guess).

You can tap into the defroster, cig lighter, or window kill switch too - I'm using those for my gauges' lights I think.
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Old 11-22-2016, 12:40 PM   #6
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Quote:
Originally Posted by ak- View Post
Cool. Are you using a momentary switch btw?
That is what I assumed his issue is..
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