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Hey everyone this is my first post on here so im sorry if i have repeated a post, i ran a search but could not find any relevant info. I have a 93 model GTs33 and after running for about 15 minutes at normal pace no excesive speeds etc. the exhaust is too hot to touch and can be heard cooling down from a fare distance away is this normal? Or could it be prehaps caused by un-burnt fuel in making its way to the exhaust. Any help would be greatly appreciated. The exhaust is 2 and a half inches. I am not sure of the brand but i can check tomorrow morning. Cheers.

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to help us help you, we'll need a few answers to some questions.

the exhaust will always be hot, what do you mean by 'too hot to touch'? with your hand?

what do you mean by 'can be heard cooling down'? describe the sound.

is it a catback exhaust? full system exhaust? mild steel? titanium? stainless steel?

un-burnt fuel will give a rich, overfuelling exhaust smell.

eug

No matter what exhaust you have, what car you drive, unburnt fuel or not, if the car has been running for 15 minutes its going to be too hot too touch with your hand :)

Unburnt fuel should not really affect the heat of your exhaust. If you're running really rich, your car may backfire on full throttle or gearshifts and you will hear a POP sound. Also, the smell issue as Eug mentioned.

Also, why is this a concern for you? Unless the exhaust is making funny noises or glowing red I doubt its really an issue.

Edited by Yawn
why anyone would want to touch an exhaust after driving their car (hard or not) is beyond me.

some people 'love' their car way too much.

Reggie, if you're not already on the new sau-qld forums, do check it out. http://www.sauqld.com/ipb/index.php?

yeah trying to touch an exhaust that has had hot gas throuh it is rather silly.

unburnt fuel will actually cool the exhaust not heat it up. if it is unburnt then it means that it didn't reach a high enough temp to ignite so it will be cooler than the gas from the fuel that did ignite.

is the sound of it cooling down a ting ting noise? if it is, that is just the metal contracting as it cools. yuo will hear a tin roof on a house doing the same thing on a hot day. it is normal.

Its stainless steel full system. Why would i touch my exhaust? Because if i can hear it cooling down, (and yes it is a tinging noise) from inside my house and the car is about 20m away im curious to know how hot it is. and as none of my previous cars (VS commodore and subaru liberty) got this hot, i was wondering why a skyline should be so different.

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