wire the ic pump to a switched 12V source?
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From: Mia
2005 E 55
In the driverside engine fuse box is a switched 12v signal. It's a red wire in the plug behind the last gray relay. 
With that you can run a wire direct to the pump if you have the factory bosh pump. The funny thing about our cars is that the ic pump relay is located in the trunk which makes running a ground switch to cabin a little harder. Hope this helps.
With that you can run a wire direct to the pump if you have the factory bosh pump. The funny thing about our cars is that the ic pump relay is located in the trunk which makes running a ground switch to cabin a little harder. Hope this helps.
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From: orange county, ca
2006 E55
rflow: thanks, I might rig up something temporary for the dyno. Is it the wire with the blue tap on it?
I dont know much about relays and such, so i wouldnt know where to begin on that. All I know is + and -. haha
I dont know much about relays and such, so i wouldnt know where to begin on that. All I know is + and -. haha
Last edited by psk145; Feb 14, 2007 at 11:16 PM.
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2015 S212
In short, the only real advantage to doing the rewire is that the car will cool off faster between dyno runs or even before the first run while it is sitting at idle. It all depends what you are trying to do. If you want a real life number, then leave it be. If you want a huge number just to feel better, then go for it.
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I say leave it bro. Later, you can choose to switch out the IC or even just upgrade the pump and have it run hot.
Since the ECU controls the pump, why don't one of these $3K ECU mods address that?
Since the ECU controls the pump, why don't one of these $3K ECU mods address that?
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2006 E55
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Out Of Control!!
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From: San Diego
2015 S212
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No longer stock '06 E55, A3 3.2 Quattro, GLE 400d, R107 280SL, Golf Polo
Can't this be done in STAR or ECU programming to turn on pump permanently when motor is running ?
Last edited by stevebez; Feb 15, 2007 at 05:38 AM.
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From: Mia
2005 E 55
I am sorry, i assumed you wanted just to test on the dyno from the beginning and not make it a permanent install. Leaving the pump running on the dyno with a fan on will keep heat soak down. If it is long term solution then you need a 30 amp relay and an in-line fuse like sunman said.
You can get a 30 amp relay from the auto-parts store and follow the instructions in the link below. The relay you buy at the store will have numbers just like the one below.
http://www.ado13.com/techs/relay.htm
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From: orange county, ca
2006 E55
Yes the wire with the blue tap.
I am sorry, i assumed you wanted just to test on the dyno from the beginning and not make it a permanent install. Leaving the pump running on the dyno with a fan on will keep heat soak down. If it is long term solution then you need a 30 amp relay and an in-line fuse like sunman said.
You can get a 30 amp relay from the auto-parts store and follow the instructions in the link below. The relay you buy at the store will have numbers just like the one below.
http://www.ado13.com/techs/relay.htm
I am sorry, i assumed you wanted just to test on the dyno from the beginning and not make it a permanent install. Leaving the pump running on the dyno with a fan on will keep heat soak down. If it is long term solution then you need a 30 amp relay and an in-line fuse like sunman said.
You can get a 30 amp relay from the auto-parts store and follow the instructions in the link below. The relay you buy at the store will have numbers just like the one below.
http://www.ado13.com/techs/relay.htm
I got the relay, but mine has two "87 terminals". One is yellow and the other red. Which would I use to run to the IC pump??
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From: Mia
2005 E 55
One should say 87a for accessory which would go to the pump and the other to your 12v supply . Yellow should be accessory (pump) and red constant 12v supply to the relay.
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From: orange county, ca
2006 E55
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From: Mia
2005 E 55
Were is your second 87 terminal. If you have a 30 terminal then the terminal opposite is your accessory(pump). The one to the left would be your switched ignition and opposite that your ground. Does your relay have five prongs ? If it has 5 you ignore the center one, which would be 87a.
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The best way to do it, is to run a relay which turns on by any of the "Key 1" position circuits. This is how my CM90 has been hooked up for the last four years and 90,000 miles. To make the pump run all I have to do is to turn the key to "1" position and I can hear hear buzz in the background.
Charles, on the dyno you are not likely to see any benefit. How many fans, how big the fans are and whether the shop knows how to run 55s on the dyno will likely determine whether you get proper dyno number or not.
If you need any help call me, I am not too far.
Charles, on the dyno you are not likely to see any benefit. How many fans, how big the fans are and whether the shop knows how to run 55s on the dyno will likely determine whether you get proper dyno number or not.
If you need any help call me, I am not too far.
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From: orange county, ca
2006 E55
It is 5 prongs, so 87a is out. THANKS
I guess its a bit of cabin fever I have going here. I havent messed with my car for a while, so Im looking for something to do!
Thanks for the offer
Originally Posted by Vadim @ VRP
Charles, on the dyno you are not likely to see any benefit.
Thanks for the offer
