Exhaust question and other little discussions - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 09-15-2012, 09:53 PM Thread Starter
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Exhaust question and other little discussions

Well I'm new to diesel and have been learning everything I know about this 7.3 powerstroke on my own for the past year and a half that I've had this truck. Well the truck uses Vegetable Oil as a second source of fuel so there is no cat. converter on it and no muffler. It is a straight pipe to the back of the cab and then it's cut off right there. What are all of your opinions on this. (Vegetable oil aside haha) Is it more advisable to at least put the muffler back on to at least have some kind of back pressure? I was told not to have the cat converter on it with running vegetable oil. But the guy that installed the Vegetable oil system on it gave me a bunch of stuff for this truck today from his old 7.3 same year as mine and he gave me the tail pipe and muffler. Should I keep it off for more power? Or put it on for a little back pressure on it? ANY advise on this truck is MORE than appreciated! Thank you for reading. And feel free to email me at any time at creynolds14jr@hotmail.com
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post #2 of 4 Old 09-16-2012, 06:52 AM
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There's No Advantage to "Back Pressure" because of the Turbo.
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post #3 of 4 Old 09-16-2012, 09:59 AM
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Leave the exhaust wide open but if it is just cut underneath the cab, I recommend getting a 90 degree (or anything you want) and dumping it out of the side. Keep those temps out from under your truck.

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post #4 of 4 Old 09-16-2012, 12:21 PM
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i would get rid of the cat as well. unless you need it for smog.
you need absolutely no back pressure on these trucks.
make sure you change the fuel filter more often since you are using veggy oil

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