MHP 180F 63 Thermostats Now Available
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'09 C63 AMG
MHP 180F 63 Thermostats Now Available
MHP is now offering modified stock/MB (180F open temperature) Thermostats.
The primary benefits of a lower open temperature thermostat are the consistant performance and increased engine engine life. The relatively high open temp stock thermostat assures reduced emissions and therefore isn't optimal for performance applications as the ECU pulls timing when seeing higher ECTs (Engine Coolant Temps).
Lower coolant temps equate to increased engine longevity/durability and allow us to use more aggressive timing tables when custom ECU or ECU/TCU tuning, though even when stock the OEM ECU calibration won't have to pull as much (if any) timing due to heat soak--equating to more consistant performance. Next to detonation/preignition and excessive rpm, heat is the next largest killer of engines.
Real world testing with our own C63 has shown significant reductions in ECTs, 15-25F less depending on application, environment, and driving situation. With the OEM/stock Thermostat we averaged 194-204F ECTs while cruising at 75-80mph. Post MHP T-stat install, we see a consistant 174-180F at the same speed. We also have not witnessed the coolant temp rise above 194F, even after hard WOT beatings, and in stop and go traffic.
When paired with our ECU or ECU/TCU tuning, which turns the cooling fans on earlier, the heatsoak issue with 63s is completely resolved.
Price is $279.99 shipped in the Continental U.S. via UPS/FedEx Ground.
The primary benefits of a lower open temperature thermostat are the consistant performance and increased engine engine life. The relatively high open temp stock thermostat assures reduced emissions and therefore isn't optimal for performance applications as the ECU pulls timing when seeing higher ECTs (Engine Coolant Temps).
Lower coolant temps equate to increased engine longevity/durability and allow us to use more aggressive timing tables when custom ECU or ECU/TCU tuning, though even when stock the OEM ECU calibration won't have to pull as much (if any) timing due to heat soak--equating to more consistant performance. Next to detonation/preignition and excessive rpm, heat is the next largest killer of engines.
Real world testing with our own C63 has shown significant reductions in ECTs, 15-25F less depending on application, environment, and driving situation. With the OEM/stock Thermostat we averaged 194-204F ECTs while cruising at 75-80mph. Post MHP T-stat install, we see a consistant 174-180F at the same speed. We also have not witnessed the coolant temp rise above 194F, even after hard WOT beatings, and in stop and go traffic.
When paired with our ECU or ECU/TCU tuning, which turns the cooling fans on earlier, the heatsoak issue with 63s is completely resolved.
Price is $279.99 shipped in the Continental U.S. via UPS/FedEx Ground.
Last edited by MHP; Nov 15, 2008 at 11:39 PM.
Super Member
Joined: Jan 2007
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From: New York
old daily driver '07 E63(gone); new dd '14 750xi; 2013 Viper GTS
Isn't the thermostat WITHOUT the ECU/TCU pretty mush useless? Even though the stat opens up early it would still reach the same operating temp..will just take a little longer.
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'09 C63 AMG
Far from useless. The stat will open sooner than a stocker which is most notable on the highway or while cruising. In stop and go you really need the ECU tuning to get the fans on earlier as well.
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From: S.D Cali
CLS63
Take off the engine cover, look for the slot where the engine cover front clip clips in, move all that crap and have fun, you don't need to remove it all just move it out of the way. Follow the radiator hose there and you will see it.
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From: Naperville, IL/Chicago
2008 CLK63 Black Series 2012 C63 Black Series 2014 SLS Black Series
Sounds like a job for the Mercedes dealership...LOL
oh, and Juicee won't be to happt either 
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2008 CLK63 Black Series 2012 C63 Black Series 2014 SLS Black Series
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From: San Diego, CA
07 RS4 sold, R53 Cooper S, 2008 Cayman S, 2012 GTR
On a level of 1 to 10, I'd call it a 1.5. Once you see where the thermostat is then the battle is over.
good luck
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From: S.D Cali
CLS63
James@ACGSD He saiD COOLANT 
Looking forward to hopefully the engine staying a little cooler!
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LEXUS XP
Brass air fittig
HELLO!!!
Now that is a lot of brass air fittings there is just about every type
of air fitting that you could want. Wholesale prices too. I guess these could be used as small water pipe fitting also. I
used some of the parts to make my babington wvo bu
THANK YOU .
Now that is a lot of brass air fittings there is just about every type
of air fitting that you could want. Wholesale prices too. I guess these could be used as small water pipe fitting also. I
used some of the parts to make my babington wvo bu
THANK YOU .
