Exhaust clearance.
Thread Starter
Launching!
Joined: Mar 2010
Posts: 293
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From: Va Bch, VA
Exhaust clearance. This winter I plan on fitting a dual exhaust setup on my 02 Z28. I want to run 3" from the headers, through high flo cats, into a pair of sweet thunders w/ 3" inlet and 2.5" outlets, over the axle and out the back. I have poly motor mounts and trans mount. I have a pile of mandrel bends, welding skills, time, and initiative. My question is, how close is too close? How close can I route the exhaust pipe to the floor, frame members, etc? How close to the fuel tank?
How close can I get the pipes to the drive shaft? It moves up and down, but I am sure I need some side to side clearance for things moving around. How much?
Thanks for the help guys.
How close can I get the pipes to the drive shaft? It moves up and down, but I am sure I need some side to side clearance for things moving around. How much?
Thanks for the help guys.
If you use the right hangers you should be able to get it real close and still have the clearance.
The hangers I have in the middle are different than the OEM hangers and they prevent the exhaust from moving, only a little bit each way so that there's no issues with cracking. Allows for real tight fit but no rubbing.
The hangers I have in the middle are different than the OEM hangers and they prevent the exhaust from moving, only a little bit each way so that there's no issues with cracking. Allows for real tight fit but no rubbing.
I would keep the minimum clearance to at least 1/8" from the metal under body, and at least 1/4" minimum from anything that can melt even if it has a heat barrier protecting it. As far as drive shaft clearance just make sure that with the rear suspension compressed(load the rear down), and at full droop(rear-end hanging down) that you have about 1/16" clearance. Anywhere in between those two I'd keep at least 1/8".
IMO, when you're setting up you over axle pipes do it with the rear suspension fully compressed to help maximize you clearance with the rear-end assembly.
IMO, when you're setting up you over axle pipes do it with the rear suspension fully compressed to help maximize you clearance with the rear-end assembly.
