BMW 60-2 wheel decoder help needed

Xillur · Post by **Xillur** » Tue May 02, 2006 3:14 pm

Hi guys,

Been looking all over www.msefi.com www.e30tech.com forums and ofcourse the extracode site for hints regarding filling out the "wheel decoder settings" in megatune 2.25 release and firmware 029q.

My wheel looks like this but my engine is a m20 not m30 and i´m using a honeywell 1gt101dc sensor:

what numbers do I put in:

Trig pos A = ?
Trig return pos A = ?
Trig pos B = ?
Trig return pos B = ?
Trig pos C = ?
Trig return pos C = ?

hope to here from you with hints, answers or even RTMF (with page guidance ha ha

)

regards

Kristian

PeterCip · Post by **PeterCip** » Fri May 05, 2006 7:59 am

What year M20?
Timing Settings for 88m20 motronic 1.3-

This is verified at the crank wheel with ) timing set.. the 5 degrees compensates for the falling edge of the actuall trigger tooth.

-pete

Gavin Lodewick · Post by **Gavin Lodewick** » Sun May 07, 2006 12:51 pm

Hi M/S Lovers
As it says, BMW 60-2 wheel decoder help needed, I have fitted the
60-2 wheel to the engine to us for anether CPU witch I have, now I also
want to run M/S with ( MegaSquirtnSpark-Extra) as this hase a lot more
EXTRAS then the ather CPU. I have a photo of my set up,PLEASE help me
under stand the setting of the angel degre

Many THANKS

Gavin

Gavin Lodewick · Post by **Gavin Lodewick** » Sun May 07, 2006 12:57 pm

BMW 60-2 wheel decoder, Hi
I forgot 1 photo of VW T4 front of 60-2 wheel,
Regards
Gavin

Xillur · Post by **Xillur** » Mon May 08, 2006 4:35 am

Hi Pete

,

Thanks just what I needed! as you can see in this post http://www.msefi.com/viewtopic.php?t=17126 I have worked on getting a stock map from the Bosch ECU translated into something MS can use.
Do you mind sharing your map ?

My M20 is a rebuild M20b25 8,8:1 (1990), stroked to 2.7Litre and it has a compression of aprox 8,2:1. It is to be fitted with a centrifugal supercharger and Intercooler real soon.

Regards

Kristian

PeterCip · Post by **PeterCip** » Mon May 08, 2006 8:42 am

Gavin, I need more info on your engine to give you advice.

Here is the map I am running up to 17PSI boost. It is rather conservative for my engine (m20). When the weather warms, i plan on Dyno tuning the table for performance.

Hope this helps.
-Pete

P.S. Who are you on e30tech?

Xillur · Post by **Xillur** » Mon May 08, 2006 12:21 pm

Hi Pete,

Thanks a bunch!

This will save me a lot of time, trimming the ignition

I´m not yet registered on e30tech, but I´m seriously considering it. It seems like a real good forum.

best

regards

Kristian

Post by **jsmcortina** » Mon May 08, 2006 1:55 pm

What's that 31 doing right in the middle ? Seems unusual to reach max advance at 2500rpm and then use less advance later ?

James

Gavin Lodewick · Post by **Gavin Lodewick** » Mon May 08, 2006 9:41 pm

Hi PeterCip thanks for you intrest.
A littel info on the Engine
VW A/Cooled Type 4 2121cc N/A
Strock = 75mm

Bore " 95.5

Cam Mild

InValves= 42mm

Exh " = 36mm

P&F heads

9.5 : 1Comp

Peter what I need to understand is how to setup the triger angle for the
60-2 wheel, I have a diagram in the MSQ of how I understand the T/Angle to be set for this engine. If my setting is incorrect PLEASE HELP
me to understand the principle behind the T/Angle setting, I have done
a lot of

in MSnS-E & the Forum on this T/Angle settings, it has not sunkin to the BRAIN yet.

V3 Board, Wastspark, 2 VB 921s Outputs LED 17 & 19. I hope this is info
and I hope the Diagram & photo will help.

Thanks Gavin

PeterCip · Post by **PeterCip** » Tue May 09, 2006 6:44 am

jsmcortina wrote:What's that 31 doing right in the middle ? Seems unusual to reach max advance at 2500rpm and then use less advance later ?

James

James,
The character of the map is taken from the stock ECU under 110 KPA. The behavior of the map is odd, but realistically the timing does need to drop off there.. There is a considerable ridge at that point in the map stock, and I have yet to QA the map on a Dyno. First I have to redo my fuel map because of that bug that crept into the 029 software..

Like I said, the map is far from ideal.. and you should use it at your own risk.

Here is the stock WOT MAP..

and the load map:

Graphing the timing shows the same odd behavior..
Am i reading it wrong James?

-pete

PeterCip · Post by **PeterCip** » Tue May 09, 2006 6:58 am

My understanding is that the trigger angle is the angle between the trigger and the event.. there is 6 degrees from tooth tip to tooth tip on a 60-2 wheel.
I started with 60 degrees, since mine was about that, and then had to add 4-5 Degrees to the trigger angle, to adjust for the exact relation between the VR sensor, and TDC(sensor is at the trailing edge of tooth 15, trigger event is at the rising edge of tooth 5). I Started with 60, and then adjusted the fixed timing 1 degree at a time, while watching the timing marks with a timing light. It was dead on between 4-5 degrees, depending on the RPM.

I'm unsure of how to set the wheel trigger values on a 4cyl engine, since i have yet to do this.. But from reading the MSNS-E wheel decoder info, it looks like you are on the right track.

If i am at all wrong, Please let me know. Don't want to be spreading misinformation, but this is how i arrived at my triggers, and my RPMs are dead on ;)

-pete

Gavin Lodewick · Post by **Gavin Lodewick** » Tue May 09, 2006 9:36 am

Thanks Peter
Maybe James or anyone else can help on this T/angle setting. It will be
much appreciated,then I can assemble the engine & then start playing,it
like a new toy to play with.
Many Thanks

Gavin

fraatti · Post by **fraatti** » Tue May 09, 2006 1:13 pm

Hi!

I want to make true cop for bmw m52 motor and i want know would this camshaft sensor wheel work with megasquirt? It's part number 7 in the picture. It's looking like half circle

Post by **jsmcortina** » Tue May 09, 2006 1:27 pm

Yes, that cam wheel ought to be ok.

James