Dash2 RPM problem

hellas
Posts: 20
Joined: Fri Jan 20, 2006 3:14 pm

Dash2 RPM problem

Postby hellas » Wed Aug 12, 2009 9:30 pm

Hi,
I’m running a DL1 and Dash2 in my BMW M3 e30 V8. From the MBE 970 ECU RPM pin I have connected the Engine speed input to Dash2. The problem is that the Dash wont show revs over 2511RPM. Under 2511 It seems to work well. Any ideas?

http://www.youtube.com/watch?v=I2bQ8dFU1kI

Setup screen:
http://www.ederacing.se/media/Dash2_RPM.jpg

Regards
Pär Hellqvist
Pär Hellqvist
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osborni
Posts: 497
Joined: Fri Dec 07, 2007 9:08 pm
Location: USA, Michigan

Postby osborni » Thu Aug 13, 2009 1:34 am

You said a v8 in a e30? Which V8? - this implies an engine swap. If your ECU isn't picking up the proper input signals it will cap speeds.

Assuming that your install works properly.... (and it sounds like it is per your video)

You can play with the # of pulses per rev to get your dash properly scaled.

You can also pick up RPM from any one of the coils. The signal pin will give you a solid and stable RPM signal. Since it's a 4 cycle motor, the number of pulses per rev should be easy to figure out. :)
BMW 2000 M Coupe

Support

Postby Support » Fri Aug 14, 2009 12:49 pm

I'm guessing you have an M62B44 in there?
Osborni is spot in, check the pulse count. If you still have issues do get in touch and I'm sure we can help out.

hellas
Posts: 20
Joined: Fri Jan 20, 2006 3:14 pm

Postby hellas » Sat Aug 15, 2009 3:08 pm

osborni wrote:You said a v8 in a e30? Which V8? - this implies an engine swap. If your ECU isn't picking up the proper input signals it will cap speeds.

Assuming that your install works properly.... (and it sounds like it is per your video)

You can play with the # of pulses per rev to get your dash properly scaled.

You can also pick up RPM from any one of the coils. The signal pin will give you a solid and stable RPM signal. Since it's a 4 cycle motor, the number of pulses per rev should be easy to figure out. :)


Hi,
The thing is that the Dash2 shows the accurate rev up to 2511RPM. The MBE ECU put out 4 pulse/rev like I have configure in the Dash2 configurations tool.

Any ideas?

Regards
Pär Hellqvist
Pär Hellqvist
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osborni
Posts: 497
Joined: Fri Dec 07, 2007 9:08 pm
Location: USA, Michigan

Postby osborni » Sun Aug 16, 2009 2:05 pm

That might literally but correct, but I would just scale the R-T software to make it look right.

It matters more that your dash displays properly, then anything else.

Barring that, pick up an RPM signal from a coil on plug driver.
BMW 2000 M Coupe

hellas
Posts: 20
Joined: Fri Jan 20, 2006 3:14 pm

Postby hellas » Sun Aug 16, 2009 9:54 pm

I have now checked the rpm signal with an oscilloscope and the signal looks very fine. A square 5v signal. Is it possible to use 5v signal to Dash2 RPM input?

/Pär
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Support

Postby Support » Tue Aug 18, 2009 12:34 pm

Yes you can use a 5v or 12v square signal for the RPM. Connect to pin2 on Connector1. Pin outs can be found here http://www.race-technology.com/wiki/index.php/Installation/ElectricalInstallation

hellas
Posts: 20
Joined: Fri Jan 20, 2006 3:14 pm

The fix

Postby hellas » Thu Aug 20, 2009 8:06 am

Pär Hellqvist
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patje
Posts: 42
Joined: Fri Jan 04, 2008 1:34 pm
Location: Belgium

Postby patje » Thu Aug 20, 2009 12:45 pm

On the electrical installation of the dash 2 it says 12v square.
I'm thinking you're not going to get any rpm with 5V square.

Tried it also. I connected it to the dl1.

MAybe you need to make a pull-up resistor?

Support

Postby Support » Wed Jan 05, 2011 10:21 am

Hi,

I'm sorry - I don't understand the question.

Kind regards,

Andy

rossdagley
Posts: 9
Joined: Sun Jan 16, 2011 7:54 pm
Location: Welwyn Garden City, Herts.

Postby rossdagley » Thu Jan 20, 2011 1:07 pm

epic thread revival Andy ;)


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