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catback exhaust and higher oil temp

Did they replace the stock catalytic converters? That could theoretically change the air fuel ratio but another could just be higher ambient temperatures as it is currently summer which makes

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Old 06-23-2011, 10:03 PM   #1 (permalink)
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Did they replace the stock catalytic converters? That could theoretically change the air fuel ratio but another could just be higher ambient temperatures as it is currently summer which makes a difference.
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Old 06-24-2011, 11:30 AM   #2 (permalink)
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Originally Posted by christian370z View Post
Did they replace the stock catalytic converters? That could theoretically change the air fuel ratio but another could just be higher ambient temperatures as it is currently summer which makes a difference.

cataliytic converter still original. they didnt change.

Weather cant be the reason.

just imagine you drive saturday morning to L.A. to change your exhaust system. you drive back after some hours in the same weather conditions and the same speed.............. but your oil temp is now arround 250 and was 210 some hours ago. thats what happend to me.
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Old 06-25-2011, 12:32 AM   #3 (permalink)
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Originally Posted by wasti View Post
cataliytic converter still original. they didnt change.

Weather cant be the reason.

just imagine you drive saturday morning to L.A. to change your exhaust system. you drive back after some hours in the same weather conditions and the same speed.............. but your oil temp is now arround 250 and was 210 some hours ago. thats what happend to me.
In terms of high speed runs and sustained higher rpms, 250 degrees actually is pretty normal. 210 seems low to me, especially since you don't have an oil cooler and run at full throttle on the highway for long time periods.
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Old 06-25-2011, 02:07 AM   #4 (permalink)
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Have you tried ECU reset? Might help. Also is your oil at the top? Could help a little bit. Yes, between low and high might be around 0,5l of oil, but it could make a difference. This helped to my TT 2.0TFSI in hot summer for running it cooler.
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Old 06-25-2011, 05:59 AM   #5 (permalink)
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Have you tried ECU reset? Might help. Also is your oil at the top? Could help a little bit. Yes, between low and high might be around 0,5l of oil, but it could make a difference. This helped to my TT 2.0TFSI in hot summer for running it cooler.
Hi to prague!

Oil level was the first i checked but pretty good like it has to be.
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Old 06-25-2011, 06:04 AM   #6 (permalink)
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I just dont hope its because of the exhaust design.
The manufacturer is doing this everything individual and lets say "handmade". Our original system is a dual line pipe. This one which i have is now a single line with a diameter of 75 cm. The original one has to lines with each arround 52 cm. I dont hope its the diameter and the flow of gas which is causing this issue.
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Old 06-25-2011, 07:22 AM   #7 (permalink)
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The volume of the 75mm single is slightly larger than the dual 52mm provided there is no choke point.
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Old 06-25-2011, 05:56 AM   #8 (permalink)
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Quote:
Originally Posted by christian370z View Post
In terms of high speed runs and sustained higher rpms, 250 degrees actually is pretty normal. 210 seems low to me, especially since you don't have an oil cooler and run at full throttle on the highway for long time periods.

Of course you are right, higher speed and higher rpms causing higher engine temp. But already after 5 miles? I dont think so. Before i could drive 240 km/h for many many miles. Frankfurt direction border of france is a nice and free autobahn. I could drive there before long distances with full speed and temps not goinger higher than 210. Some days after the exhaust change i drive there again and i needed to slow down after 5 miles of driving fast, because i was affraid to go into limp mode.
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Old 06-25-2011, 06:00 AM   #9 (permalink)
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Quote:
Originally Posted by wasti View Post
Of course you are right, higher speed and higher rpms causing higher engine temp. But already after 5 miles? I dont think so. Before i could drive 240 km/h for many many miles. Frankfurt direction border of france is a nice and free autobahn. I could drive there before long distances with full speed and temps not goinger higher than 210. Some days after the exhaust change i drive there again and i needed to slow down after 5 miles of driving fast, because i was affraid to go into limp mode.
Ah ok, I didn't realize you hit that temperature so quickly. I too suggest reseting your ECU, you can use this technique instead of disconnecting the battery which will save you having to reset the clock and windows:


Quote:
Read the process a few times before you try to do this its ALL ABOUT TIMING:

1) With the key in your pocket/car, push the Engine Start button TWICE (so the car is fully on, but not started)
2) Within three seconds of the car "ON" (again NOT started), Floor (all the way down) and Release the gas pedal fully 5 times within 5 seconds. Do not do this too fast.. 1..2..3..4..5
3) Wait 7 seconds then floor the gas pedal and hold for 10 seconds. After that 10 seconds the Check Engine Light will start to blink slowly.
4) Release the pedal and floor it down once again and hold for 10 seconds. After these 10 seconds the check engine light will disappear then begin to flash much more rapidly. After you have done the following turn the car off and then back on. The ECU is now reset!!
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