Rewiring Intercooler Pump - Lowering IATs
01-02-2019, 02:49 PM
#1
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Thread Starter
Rewiring Intercooler Pump - Lowering IATs
Did some research and found that our intercooler circuit has a thermal set point of approximately +100*F (see attached for details). Of course we all know that lower IAT means more power, so i’d like to get the pump to come on sooner. Dealer refused to lower the setpoint and I dont think i can change it via Xentry on my own. Is the pump a 3-wire, hot, ground and switched? I'd like to add in a switch where i can flip to always ON, or flip back to stock.
So... now i want to rewire it to possibly run all the time. Has anyone successfully done so? Are there any ill effects of keeping it on all the time, other than the obvious reduced life span? I am just worried that maybe the ECU cant adjust to 40°F IAT if it's setpoint is meant to be around a 100°F....?
So... now i want to rewire it to possibly run all the time. Has anyone successfully done so? Are there any ill effects of keeping it on all the time, other than the obvious reduced life span? I am just worried that maybe the ECU cant adjust to 40°F IAT if it's setpoint is meant to be around a 100°F....?
Last edited by V-AMG; 01-02-2019 at 03:05 PM.
01-02-2019, 06:53 PM
#3
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2014 E63S; AMS 100 octane ecu tune; edok tcu tune; BB intakes; dyno tuned
01-02-2019, 09:22 PM
#4
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Did this on my E55 and wired a manual override switch. It can be done but you’ll throw a temp CEL every time you flip the switch. Not a big deal, just annoying.
01-02-2019, 09:36 PM
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01-02-2019, 10:10 PM
#6
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And how’d you do it? If you have a quick wiring diagram, or if you can explain what you did, that would be awesome.
I was thinking a 2-position switch; first position signal from ECU, other position is directly to a 12V source. I actually want to use my rear foglight button for it as i’ll never use the rear fog... and no fronts for some reason. What’s nice is thatthe rear fog illuminates on the dash, so i’ll know where I'm at.
I never did it on my E55, but all it took was one quick stab of the throttle and voila, came right on. I wish there was something like that here. Better yet, i wish I could get the temperature setting changed...
01-02-2019, 10:48 PM
#7
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01-02-2019, 10:58 PM
#8
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Why the CEL? Is there feedback from the pump?
And how’d you do it? If you have a quick wiring diagram, or if you can explain what you did, that would be awesome.
I was thinking a 2-position switch; first position signal from ECU, other position is directly to a 12V source. I actually want to use my rear foglight button for it as i’ll never use the rear fog... and no fronts for some reason. What’s nice is thatthe rear fog illuminates on the dash, so i’ll know where I'm at.
I never did it on my E55, but all it took was one quick stab of the throttle and voila, came right on. I wish there was something like that here. Better yet, i wish I could get the temperature setting changed...
If I was going to do something like this again, I’d look into a higher gpm secondary pump wired to a switch either running on a bypass circuit or in line to increase flow when running prolonged boost. This way you can let the ECU do what it wants but still bypass it when needed.
01-02-2019, 11:09 PM
#9
Senior Member
Don't most tuners adjust the turn on time on these pumps anyways once you are modded?
Id imagine running it all the time would shorten the service life of the pump aswell.
Id imagine running it all the time would shorten the service life of the pump aswell.
01-03-2019, 02:29 PM
#10
Does anyone know if it would be ideal to upgrade the intercooler pump on these cars like people do with the w211? would there be a noticeable increase in cooling ability? or is it overall pointless without other mods?
01-03-2019, 02:59 PM
#11
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I think most people like us 55 guys that are into modding have already abandoned this platform.
01-03-2019, 03:02 PM
#12
but yeah i think im done with modding the m157 just looking to help the overall longevity of the engine if possible
01-03-2019, 03:14 PM
#13
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Btw, I take delivery tomorrow.
01-03-2019, 03:23 PM
#14
congrats thats awesome man you're about to have a vicious beast in your hands. although its not a benz i hope you do post at least a couple pics for us to see
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01-03-2019, 05:58 PM
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01-03-2019, 07:53 PM
#16
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I feel like I’ve stepped on a lot of toes around here with my frustrations about the direction the E63 went so I certainly wouldn’t want to make that worse. I know what sounds like objective complaints to me may be fighting words to the guys that love this platform.
01-03-2019, 09:20 PM
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i hear ya; that's unfortunate I always look forward to your input and honesty.
01-03-2019, 09:24 PM
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01-03-2019, 09:40 PM
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01-04-2019, 11:44 AM
#21
You shouldn't apologize about your honesty. some people are too sensitive. there are drawbacks that us AMG owners and fans want worked out and theres nothing wrong with mentioning them. they are great cars but I def feel like they are holding back on the performance end lol although great numbers they could def be better. Also any true tuner that likes nice cars is not biased to any brand. Personally I am a fan of a nice car. that could be an car its dumb to limit yourself or hate on other brands because you never know when they will release a better car. but yeah, I'm looking forward to seeing how you like the RS7 only drawbacks ive heard of is cooling issues/heatsoak so im curious to see your take on it or if you even run into those issues at all.
01-04-2019, 12:45 PM
#23
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Pre turbo meth injection kit. I’m not a fan of the pre turbo kit but water/meth is the better bang for the buck IAT cooling solution.
01-04-2019, 01:33 PM
#24
oh okay thanks. Was planning to do preturbo injection by drilling into the airboxes like Cfldig did on his write up. although this looks cool the other seems a little safer/ more cost efficient
01-04-2019, 02:11 PM
#25
Senior Member
You would most likely need to remove the turbo chargers to do this. That would add to a lot of cost and not worth it unless you're doing some kind of Turbo upgrade. This should allow your turbo is to compress larger volume of air to obtain the same PSI, making it into sort of a larger Turbo. I don't know if anyone that has tried injecting directly into the compressor housing. If I could do it again I would have something like this as well as post intercooler injection.
this shows a whole bunch of little injectors which is best for atomization but it's probably better to go with one big injector on each side those are less likely to get clogged up with debris. You don't ever want to have to go back in there the clean the injectors.
this shows a whole bunch of little injectors which is best for atomization but it's probably better to go with one big injector on each side those are less likely to get clogged up with debris. You don't ever want to have to go back in there the clean the injectors.
