Exhaust System Question
Exhaust System Question
(OP)
I was put in charge of designing the exhaust system for a vehicle my company is building, and I was reviewing the Code of Federal Regulations as it pertains to vehicles, and under the section for exhaust systems it says:
"No part of the exhaust system shall leak or discharge at a point forward of or directly below the driver/sleeper compartment."
which seems to fairly definitively say that you cant have an exhaust tip in front of the driver. So, my question is, how is the Mercedes SLR road legal, because the exhaust comes out right behind the front wheels. Does Mercedes have an exemption for the system, or am I interpreting the regulation incorrectly? Any help is greatly appreciated.
Thanks
"No part of the exhaust system shall leak or discharge at a point forward of or directly below the driver/sleeper compartment."
which seems to fairly definitively say that you cant have an exhaust tip in front of the driver. So, my question is, how is the Mercedes SLR road legal, because the exhaust comes out right behind the front wheels. Does Mercedes have an exemption for the system, or am I interpreting the regulation incorrectly? Any help is greatly appreciated.
Thanks





RE: Exhaust System Question
RE: Exhaust System Question
Thanks for the assistance though
RE: Exhaust System Question
The concept of exiting exhaust in front of an opening window sounds positively dangerous to me.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: Exhaust System Question
I would agree theoretically agree with you, but the issue is a low pressure question. Behind a moving vehicle, you get a low pressure zone which sucks the exhaust up behind the car, so if the rear window is open, it goes right in the vehicle. But at the sides of the vehicle, the air moving past is enough to blow the exhaust away. There have been plenty of side-pipe cars that work fine, the issue was whether or not in the US if you could have the pipes exit ahead of the passenger compartment, a-la Mercedes SLR, or if it had to be behind the passenger compartment, a-la Dodge Viper/Old Vettes
RE: Exhaust System Question
Otherwise Pat's objection is entirely sensible.
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Exhaust System Question
RE: Exhaust System Question