Disappointing track times
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Junior Member
Joined: Oct 2018
Posts: 49
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03 e55
WOW. Timing cuts start at 95*F- IAT temps that is crazy!
Seeing this makes me seriously consider doing a killer chiller or meth kit. My old Ford Lightning didnt start cutting timing until 160*
Last edited by Drew Durham; Oct 15, 2018 at 03:04 PM.
Super Member
Joined: Mar 2016
Posts: 714
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From: Los Angeles
2006 E55 AMG
I do not to my knowledge have any aftermarket heat exchanger, however it is painted black. I was actually looking at getting a secondary, would this be a better option then replacing the stocker with a larger unit?
Im going to hold off on the tuning until after i get some colder weather. If the track times are still down ill look into different tuning options
Im going to hold off on the tuning until after i get some colder weather. If the track times are still down ill look into different tuning options
Your not going to see your peek temps come down or come down by much with a secondary, I know through weeks of testing. It will recover quicker but recover quicker to what. If it's 90+ outside you can pretty much forget it. Given that you want to track it once in a while and its most likely going to be warm I would recommend killer chiller. The secondary as in my case works well for normal driving and not too warm weather. At the end the only real thing that will drop those temps is the KC driving around not worrying about flipping switches or refilling anything.
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Joined: Jun 2014
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From: Portland, Oregon
2019 Jeep Trackhawk, 2002 CLK55, 2014 911 Carrera
+1 for the Killer Chiller. If you ever race at the dragstrip, a bigger H/X won't do you any good until the car is moving and by then you've already given up a bunch of ET. Sitting in the staging lanes on a hot day can have your starting IAT's be over 120.
I installed a Killer Chiller with a front mount tank to replace the H/X and I've never looked back. Now my starting IAT's are around 55 degrees, regardless of weather. They still rise about 60 degrees during a 1/4 mile run, but ending up at 115 is much better than ending up at 165. Plus I don't have to worry about toting around bags of ice and hoping it won't melt if the car in front of me oils down the track.
The only downside I have seen is that on a hot day it takes about 5 minutes for the cabin temp to drop because you are cooling a gallon or two of hot water if it's been sitting in the heat all day.
I installed a Killer Chiller with a front mount tank to replace the H/X and I've never looked back. Now my starting IAT's are around 55 degrees, regardless of weather. They still rise about 60 degrees during a 1/4 mile run, but ending up at 115 is much better than ending up at 165. Plus I don't have to worry about toting around bags of ice and hoping it won't melt if the car in front of me oils down the track.
The only downside I have seen is that on a hot day it takes about 5 minutes for the cabin temp to drop because you are cooling a gallon or two of hot water if it's been sitting in the heat all day.
Member
Joined: Sep 2018
Posts: 98
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2012 CLS63
I have wondered the same thing. Why cant the tuner raise the threshold at which the ECU starts pulling timing? I know it's a safety thing as far as blowing your motor goes but if other cars don't start pulling timing until higher IATs why cant our cars have that threshold be a little higher? Maybe a tuner can chime in
MBWorld Fanatic!
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From: Miami, FL
2003 CL 600
I have wondered the same thing. Why cant the tuner raise the threshold at which the ECU starts pulling timing? I know it's a safety thing as far as blowing your motor goes but if other cars don't start pulling timing until higher IATs why cant our cars have that threshold be a little higher? Maybe a tuner can chime in
Most tuners don't remove safety things like that, because then you get "I had xxxxxx shop tune my car and my pistons cracked!!!!!"
I know when I tune cars for people, I don't remove IAT limiters or certain things that protect the car from an unknowing owner. In my personal car I can take the risk, because if I break it, I fix it. But I can't tell a guy (Everyone wants 'max power, but safe' tunes BTW) that if I remove this stuff, the car will be a little faster when it's getting too hot, but if you keep pushing it, you can damage it. Safer to tune it to run well when it's all in the green, and back down to be safe when it's too hot.
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Joined: Sep 2018
Posts: 98
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2012 CLS63
Just because other cars can tolerate it, doesn't mean this one can. That's not how it works.
Most tuners don't remove safety things like that, because then you get "I had xxxxxx shop tune my car and my pistons cracked!!!!!"
I know when I tune cars for people, I don't remove IAT limiters or certain things that protect the car from an unknowing owner. In my personal car I can take the risk, because if I break it, I fix it. But I can't tell a guy (Everyone wants 'max power, but safe' tunes BTW) that if I remove this stuff, the car will be a little faster when it's getting too hot, but if you keep pushing it, you can damage it. Safer to tune it to run well when it's all in the green, and back down to be safe when it's too hot.
Most tuners don't remove safety things like that, because then you get "I had xxxxxx shop tune my car and my pistons cracked!!!!!"
I know when I tune cars for people, I don't remove IAT limiters or certain things that protect the car from an unknowing owner. In my personal car I can take the risk, because if I break it, I fix it. But I can't tell a guy (Everyone wants 'max power, but safe' tunes BTW) that if I remove this stuff, the car will be a little faster when it's getting too hot, but if you keep pushing it, you can damage it. Safer to tune it to run well when it's all in the green, and back down to be safe when it's too hot.
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Joined: May 2015
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From: Miami, FL
2003 CL 600
Good to know. I can def see how someone could blame the tuner for blowing their engine as well even if they wanted the factory safety parameters removed. I was just wondering if it were even possible to remove them but toy started that you could remove from your own vehicle so I guess so.
Super Member
Joined: Jun 2017
Posts: 899
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2005 E55
What ever you were tuning with HP/Cobb/Megasquirt was probably 100x more friendly than these german ECUs that appear to have been designed with pentagon level security.
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MBWorld Fanatic!
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From: Miami, FL
2003 CL 600
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E55
Disappointing track times
I see comments by many recommending Raceiq for a ECU and TCU tune. Are they still in business? I've been trying to contact them over the past 2 weeks, left voice messages, sent emails and get no response. Any ideas?
