Verifying 10deg BTDC on a Corrado???

All Megasquirt 1 support questions. See also the Documentation

Moderators: jsmcortina, muythaibxr

Post Reply
Sodaguard
Helpful MS/Extra'er
Posts: 99
Joined: Sat Dec 10, 2005 1:38 pm
Location: Minneapolis

Verifying 10deg BTDC on a Corrado???

Post by Sodaguard »

Trying to run EDIS4 on a 91 Corrado G60. The Corrado has the timing indicator on the flywheel, so it has no degree wheel. So you have to use one of those dial type timing lights that don't work with wasted spark.
What can I do???

I'm sure I have the VR sensor pretty close, but I'm also sure I'm probably a couple of degrees off. Worst case scenario, if I were to leave the timing where it is could I just compensate for the 2-4 degrees it may be off?

So basicly, I'm having trouble getting to 10 deg BTDC, can I just leave it and compensate in Megatune? If not, please tell why.

Thank You,

Phil
jsmcortina
Site Admin
Posts: 39585
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK
Contact:

Post by jsmcortina »

Could you describe the timing marks on the flywheel a little more? If there are any timing marks you should be able to use them.

Also, if this is a 60-2 setup from the factory you could possibly use that instead of EDIS (although it sounds like you are very close on the EDIS setup and should likely finish it off.)

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".
Moonsteel
Helpful MS/Extra'er
Posts: 92
Joined: Sun May 02, 2004 10:02 pm
Location: Ottawa, ON, Canada
Contact:

Re: Verifying 10deg BTDC on a Corrado???

Post by Moonsteel »

Timing marks on the Corrado flywheel are 0 and 6 deg.
Set your timing gun and MS to 6 instead of 10 and use that mark.
Accomplishes the same thing.
If I'm not mistaken, 10 is just used because it's a common timing mark and most cars will fire up with timing set in that range.
Jerome
1990 16vG60 Corrado - MSnS-E 024s9, v2.2, blown motor (oil pump) - rebuilding
1988 16v GTI - (sold)
jsmcortina
Site Admin
Posts: 39585
Joined: Mon May 03, 2004 1:34 am
Location: Birmingham, UK
Contact:

Post by jsmcortina »

10deg is built into the EDIS module as the "limp home" base timing with SAW removed. The timing MUST equal this or all the timing will be off. Adjusting Trigger Angle in Megatune will not compensate for this.

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".
Sodaguard
Helpful MS/Extra'er
Posts: 99
Joined: Sat Dec 10, 2005 1:38 pm
Location: Minneapolis

Post by Sodaguard »

jsmcortina wrote:10deg is built into the EDIS module as the "limp home" base timing with SAW removed. The timing MUST equal this or all the timing will be off. Adjusting Trigger Angle in Megatune will not compensate for this.

James
Does it have anything to do with dwell? Or if I know that it is 4 degrees off can I compensate on the spark table?

Will it run? like it should if I compensate on the spark table?

Thank You?
Carl Gianonatti
MS/Extra Newbie
Posts: 6
Joined: Mon May 29, 2006 10:35 am

Post by Carl Gianonatti »

Dwell is controlled by the edis module. Changing the dwell will do nothing. I don't really think it's too important to get the spark dead on. I think it's really nice to know exactly what the timing is though. Through tuning you will compensate if there are any discrepancies.
Sodaguard
Helpful MS/Extra'er
Posts: 99
Joined: Sat Dec 10, 2005 1:38 pm
Location: Minneapolis

Post by Sodaguard »

Carl Gianonatti wrote:Dwell is controlled by the edis module. Changing the dwell will do nothing. I don't really think it's too important to get the spark dead on. I think it's really nice to know exactly what the timing is though. Through tuning you will compensate if there are any discrepancies.
If what you say is accurate,then that is what I wanted to hear. thats pretty much the thought between me and my buddy that is helping me.
Sodaguard
Helpful MS/Extra'er
Posts: 99
Joined: Sat Dec 10, 2005 1:38 pm
Location: Minneapolis

Post by Sodaguard »

^^^ Does this sound correct? Anyone disagree? Other Ideas?

Thanks,

Phil
theturbodog
MS/Extra Newbie
Posts: 20
Joined: Fri Mar 17, 2006 8:38 am
Location: Texas

another option

Post by theturbodog »

It would be easy to set the motor at 10 degrees and mark the flywheel with a 10 degree mark. If I recall there is plenty of room to punch a mark in the wheel through the viewing portal or use a paint marker.
cosmo1stgen
Helpful MS/Extra'er
Posts: 56
Joined: Fri Mar 10, 2006 7:08 pm

Post by cosmo1stgen »

On a vw with edis the only way that ive been able to check it is to leave the saw wire connected then set all the timing values in the timing map around idle to 6 deg. Check that megatune says 6deg on the timing guage on the 1st screen. Then use a cheap timing light and check the timing at the flywheel. Assuming that you have the edis module wired corectly and you have the settings right in megatune you should be seeing 6 deg on the pointer. Then you know you have the wheel aligned correctly.
Post Reply