Rev Limiter issues

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Maddog6961
Helpful MS/Extra'er
Posts: 134
Joined: Thu Sep 01, 2005 8:33 am

Rev Limiter issues

Post by Maddog6961 »

V3.0 board
Triggering MSD6A unit
1/5/2008 Beta Code

I'm not sure if this is a bug in the beta code or if its a problem with how I have things setup, but my rev limiter settings arn't working. I am using the spark retard/cut and using 13 degrees of retard for the soft rev limit. When I hit the soft rev limit, it added 13 degrees to my timing instead of retarding. When I put -13 in the maximum retard field, it automatically sets it to 13 next time I open up the rev limiter settings. Any ideas here?
George Carstens
1984 BMW 533i turbo
MS II Extra Beta
http://www.wreckracing.com
jsmcortina
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Post by jsmcortina »

Could you post your MSQ please. I tried this on the bench and the Megatune indicated advance appeared to correctly retard when I reached the limiter.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
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Maddog6961
Helpful MS/Extra'er
Posts: 134
Joined: Thu Sep 01, 2005 8:33 am

Post by Maddog6961 »

Here is my msq
George Carstens
1984 BMW 533i turbo
MS II Extra Beta
http://www.wreckracing.com
jsmcortina
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Posts: 39610
Joined: Mon May 03, 2004 1:34 am
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Post by jsmcortina »

How are you determining that the advance increases instead of decreases?
Is this using a strobe or on Megatune's gauge.

James
I can repair or upgrade Megasquirts in UK. http://www.jamesmurrayengineering.co.uk

My Success story: http://www.msextra.com/forums/viewtopic ... 04&t=34277
MSEXTRA documentation at: http://www.msextra.com/doc/index.html
New users, please read the "Forum Help Page".
Maddog6961
Helpful MS/Extra'er
Posts: 134
Joined: Thu Sep 01, 2005 8:33 am

Post by Maddog6961 »

I think I have a datalog of it. I was trying to get fueling dialed in under WOT.
George Carstens
1984 BMW 533i turbo
MS II Extra Beta
http://www.wreckracing.com
Maddog6961
Helpful MS/Extra'er
Posts: 134
Joined: Thu Sep 01, 2005 8:33 am

Post by Maddog6961 »

I just realized that the rev limiter settings in that datalog don't match up to the msq I posted. That was after I made some changes that I haven't reteseted yet. Here is the MSQ that matches that datalog.
George Carstens
1984 BMW 533i turbo
MS II Extra Beta
http://www.wreckracing.com
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