Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - How hot is your exhaust system in your car

Smokingwheels · 03-19-2011, 11:28 PM

I did a test with my engine using a spray bottle to spray the exhaust pipe at various places until I found the point at where is just boils when it is at normal operating temperature.

I then measured the distance away from the head to give me some indication of how efficient my engine is running.

I have ~ 78% more MPG when driven in the city at the moment and I still have timing issues under acceleration which accounts for 17% of the running time during my test so as a guess I could see another 4% increase in my MPG figures.

The test
At a distance of ~1000mm from my head, water just starts to boil eg 100 deg C.

At a distance of ~2400mm from my head, I can touch the exhaust pipe for about 1 sec (this is not a good way to check temp cause you may loose you skin)

At the end of my system the pipe is only warm to touch eg can keep hand on it forever without any discomfort.

I was wanting to know how your exhaust system compares to mine?

I have had reports of the end of the system will burn skin off.

03-19-2011, 11:28 PM	#1 (permalink)
Smokingwheels EcoModding Lurker Join Date: Feb 2011 Location: Australia Posts: 21 Smokingwheels - '84 Nissan Bluebird wagon LX 90 day: 35.99 mpg (US) Red Z - '79 Nissan 280 ZX Blue Ford - '95 Ford Falcon GLI 90 day: 18.18 mpg (US) Thanks: 0 Thanked 1 Time in 1 Post	How hot is your exhaust system in your car I did a test with my engine using a spray bottle to spray the exhaust pipe at various places until I found the point at where is just boils when it is at normal operating temperature. I then measured the distance away from the head to give me some indication of how efficient my engine is running. I have ~ 78% more MPG when driven in the city at the moment and I still have timing issues under acceleration which accounts for 17% of the running time during my test so as a guess I could see another 4% increase in my MPG figures. The test At a distance of ~1000mm from my head, water just starts to boil eg 100 deg C. At a distance of ~2400mm from my head, I can touch the exhaust pipe for about 1 sec (this is not a good way to check temp cause you may loose you skin) At the end of my system the pipe is only warm to touch eg can keep hand on it forever without any discomfort. I was wanting to know how your exhaust system compares to mine? I have had reports of the end of the system will burn skin off.