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Dyno'ing my E60 M5?

1K views 3 replies 3 participants last post by  genyosai 
#1 ·
Anyone here knows of an "easy" location to get a tach output signal to the dynometer?

I've had my Alpine White/Red Leather-brushed Aluminum e60 M5 for 4 weeks now. I'm studying different performance avenues, but want to get a base run on my car before any changes are made.

There must be a tach output signal that's easily tapped into rather than removing the coil covers to apply the signal pick-up, right? I've noticed (as far as I can tell) there's no diagnostic interface under the hood of this model... where pin "6" (I believe) used to be the rpm signal. Is by chance pin "6" inside the car (the diagnostic plug) the tach output signal??

Our local dynometer has the 12v adapter, but I suppose the M has excellent noise suppression as we couldn't get a signal via this method.

My friend dyno'd his e55 today through the 12v power supply inside his car without an issue. He did, however, have to perform a sequence in order to put his car into "test" mode; used for dyno'ing, etc. Perhaps this mode removes any noise filtration and allows for the 12v adapter to operate correctly... I don't know. Is there any such "mode" for the M?

Anyway, any help here would be greatly appreciated.

Thanks,

--nicholas
 
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#2 ·
Nicholas,

There is not a "dyno mode" on the M5 like there is on the E55. It sure would make life easier for all of us.

I cannot answer your question regarding getting the tach reading. My old dyno shop would simply strip back the coil covers (if I remember correctly) on my E55 and clamped the dynometer reading device onto it.

Also, the M5 dash will light up like a christmas tree while doing the dyno. From what I've read on here, don't worry it will clear itself once you drive it a bit. Someone also posted success dyno'ing the car by simulating the hood being closed. They accomplished this by engaging the hood latches and fooling the OBD to think the hood is closed.

Hope this helps somewhat. You may also want to search the forum for dyno methods.

Cheers,

Darren
 
#3 ·
I know for a fact there's an easy hook up to the tachometer lead. I just don't remember what he did. And you have to run it with the hood close, no big deal. Abid from ASR took like 5 min or less to set up the dyno after the car was strapped in.

All I remember is the car was being strapped in and I turned around for a min to talk to someone, next thing I hear the rollers start to spin.:eek:oohhh:
 
#4 ·
I know for a fact there's an easy hook up to the tachometer lead. I just don't remember what he did.
Sure would be nice if you could find out :) I suppose I 'could' pull back the coil covers on the valve covers, but that's a pain. nevertheless, if I had to, do you by chance know which forefront cylinder is cylinder #1 (left or right while standing in front of the car facing the engine?).

thanks,

--nick
 
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