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well... headers- lancer's out- its got a leak in the exhaust system!
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Fantastic. Now all the more better!
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But, if we are talking normal unmodded rides, I do not see any reason why our cars should not be able to take this heat and more. A simple example. I have done Chennai-Kerala drives many times in this kind of weather, a distance of close to 800kms, done in a single stretch of 14-16 hours driving, with a 15min break every 2-3 hours, max speeds between 100-140kmph, depending on road conditions.
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sirjee, Highway driving is not going to have sudden braking, sudden acceleration,sudden gearshifts, sudden direction change
every few seconds. Basically, an experienced driver on a track is going to be pushing his and the cars limits to get a better time,every lap.
This is strenuous enough for NA cars. For turbo cars, this can be highly damaging without the driver realising. With the searing 40 degree Chennai heat and high revving, the engine oil would become as thin as it can get and lubrication efficiency goes down. And we know what happens next.
If you read your temp guage really well, at such hot conditions,radiator almost does no difference to the coolant temperature when it passes the fins since the air passing through is HOT already.
So, the remedy for this is running the engine on racing oil and upgrading the radiator to 3 or 4 core heavy duty radiators and special water sprays for the turbo intercooler.