DVC

I've been searching for a clean way to wire the pump to run constantly on an '06, without success.

I saw this, but can't make sense of it:

"You guys are making this to hard. No need to get anywhere under the vehicle. Remove trunk left panel. Gain access to rear sam, unplug connector 1 depin wire 3 red/yellow, stochlock or solder to wire of PLUG 9 on the back same. That circuit is key on hot and runs the rear power outlet. I have pics if needed."

Can anyone clarify please?

lowprofile

Here's the solution:*

https://mbworld.org/forums/w211-amg/...ficiently.html






*I have not tried this yet.

RedBullJnky

https://mbworld.org/forums/w211-amg/...has-begun.html
This is what I did after I called Shardul. Post 19 has a pic of the wire.

lowprofile

Here's another location to tap from:
https://mbworld.org/forums/2454224-post1.html

DVC

Thanks for the help guys!

Can you wire straight off that red wire in the fuse box, to the positive wire of the pump harness, or do you need to use a relay?

Does the '06 only activate the pump when the blower is engaged?

RedBullJnky

Yes you can. No relay. And Yes.

DVC

Awesome, thanks again for the help and the links!

jcjmw

My suggestion is that you add a fuse relay.....just in case something happens. Also, you can take out the fuse when you do not want the pump to run.....you will want that possible option.

SuperchargerV8

Does the pump last if its running all the time ?

Does it make a noticeable differences if it pump is running all the time ?

MBH motorsports

On my old C55, I had my I/C pump wired to be on in the AUX position and at all times, when the car is running. In all honestly I don't know if you can wire it just to come on when the car starts, and not have it on when the key is in the AUX position.

I found out the hard way that sitting in the staging staging lanes with only my I/C pump on is a quick way to kill your battery. Thank God for Chiromikey being in front of me as he gave me a jump.

If found it to be a nice feture to have the fluid moving while the car was not running, but It will tank your battery pretty fast. So if you can wire it to only come on when the engine is running, Thats how I would do it.

Also, I don't think there is anyone here who hasn't had the stock bosch pump crap out on them. So if you are looking to run the stock pump all the time. It will not last. Then again, who knows? Maybe its the constant on/off crap that kills these pumps.

DVC

Thanks again for all of the help guys!

So I wired it (fused) to come on in key position 2, and installed the updated Bosch pump.

Before this I would get the IAT up to 170* (with 65* ambient) after a couple of WOT blasts. After it was in the 170s, and crusing around without boost for 10-15 minutes, the IAT wouldn't go below 140*. So, obviously the pump was dead, or there was an issue with my pump electrical circuit.

After the new pump wired constantly, the IAT stays within 10* of ambient and never exceeded 97* after a long WOT pull (75* ambient). It also recovers very quickly now.

This is the way the pump runs in my Lightning stock from SVT, and I've only replaced it once in 5 years. I'd rather replace the pump every few years and keep IATs in check.

nanayaw6

How long was that WOT run and how high do you go after multiple runs?

DVC

That was 0-85 MPH, and then about 2 minutes later, another 2nd gear roll to 3rd gear shift and then lifting. Seems pretty good?

Have you found anyone local to trust for a dyno tune?

nanayaw6

That sounds pretty good to me. I think I may need to change my pump soon since I have a ton of miles on there. As far as local, one of the guys here uses Buckhead Imports. Another one is Adam from Malone's Automotive.

DVC

Thanks for the reply. Do you use the Torque app to datalog? Is it too slow to watch boost in real time? It seems like if I hit it in 1st, by the time I'm at the middle of 2nd I only see 5.9 PSI. Probably need to actually log it.

nanayaw6

You're welcome and yeah I use torque and like you I find the lag to be a bit too much. I'm forced to use it mainly for my IATs now.