Just a little query as to the wire mod on the tacho for Wasted Spark.

Since soldering the wire on the back of the tacho for the Wasted Spark, when I start the car the voltage on my secs monitor is only 11.5v until I rev past 4k once she has warmed up a bit and back to 14v plus for he rest of the journey regardless of revs there after.

Is it to do with the connections where the new wire soldered on to the big pin connection solder point is dragging the (now) more power needed to run the tacho arrow until it reaches a particular amp rate or something (i.e. the 4k revs mark) that it'll give the right voltage afterwards through-out the loom on completion sort of thing if that makes sense as that's the way I see it (not that I am electronically minded lol). Just seems strange to me. Does this happen to others who have done the wire mod.???

I have been told that it could be an extra regulator behind the dash or something like that.

Pic of the mod. I know its not the best soldering you've seen lol

 

Check your "charging" light still works as it should. If it doesn't, the alternator won't start to charge until engine revs go over ~3k rpm (depending on pulley ratios).

 

Charging light as in the dash battery warning light mate??

 

yes indeed

 

Cool, think it does work fine. Will have a look later this morning when I finish work. cheeRS

 

Didn't know Stevie wonder done soldering

 

Har har very funny Ham fisted me when it comes to soldering

 

NO no that's so wrong heat sinks and the right tools for pcb boards

Looks like you have been a bit shy on the flux too

 

Nice one mate, it was the bulb. It slid out when I removed the dash instruments lol. Thanks mate All is working brilliantly now

Sorry, either I am being blonde but don't get it lol

 

That looks pretty scary!

 

I know bud, but I think the photo makes it look crap IMO. I might do it again with a thinner wire and get a mate to do it next time as he is v good at soldering.