Help with boosted Alpha-N

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Turbo nut
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Joined: Wed Mar 29, 2006 12:00 am

Help with boosted Alpha-N

Post by Turbo nut »

My engine runs great using Speed Density except at idle. I have switched to Alpha-N to test tunning idle and it works very well. How can I set it up to use Alpha-N up to 1500 RPM and Speed-Denisty after. I can't seem to get my head around ITB mode. Would that work? I have searched on the subject but like I said I just can't seem to get it.
1982 porsche 930
Matt Cramer
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Re: Help with boosted Alpha-N

Post by Matt Cramer »

To do this, use a set of tables in multiplicative mode. Set the SD table to 100% below 1500, and set the alpha-N table to 100% above 1500 RPM.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
Turbo nut
Experienced MS/Extra'er
Posts: 165
Joined: Wed Mar 29, 2006 12:00 am

Re: Help with boosted Alpha-N

Post by Turbo nut »

Could you explain this a little further. I feel about as smart as a brick but I don't realy get how to set that up.
1982 porsche 930
Matt Cramer
Super MS/Extra'er
Posts: 17499
Joined: Thu Apr 16, 2009 8:08 pm

Re: Help with boosted Alpha-N

Post by Matt Cramer »

Matt Cramer -1966 Dodge Dart slant six running on MS3X
Turbo nut
Experienced MS/Extra'er
Posts: 165
Joined: Wed Mar 29, 2006 12:00 am

Re: Help with boosted Alpha-N

Post by Turbo nut »

That link did help. Thank you Matt. I think it would take tuning everything over again or am I wrong? I tried using idle ve also and it helped a little. Is it possible to make the idle ve table alpha-n and still keep ve table 1 speed density? The thing runs great soon I touch the the pedal.
1982 porsche 930
Matt Cramer
Super MS/Extra'er
Posts: 17499
Joined: Thu Apr 16, 2009 8:08 pm

Re: Help with boosted Alpha-N

Post by Matt Cramer »

You would only need to tune the idle portion again if you go that route; the part above 1500 RPM would stay untouched.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
Turbo nut
Experienced MS/Extra'er
Posts: 165
Joined: Wed Mar 29, 2006 12:00 am

Re: Help with boosted Alpha-N

Post by Turbo nut »

Matt does this look right?
1982 porsche 930
Matt Cramer
Super MS/Extra'er
Posts: 17499
Joined: Thu Apr 16, 2009 8:08 pm

Re: Help with boosted Alpha-N

Post by Matt Cramer »

IF it was tuned with "Multiply MAP" off, yes.
Matt Cramer -1966 Dodge Dart slant six running on MS3X
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