Quote:
Originally Posted by 2ndgenz28
how much exhaust back pressure/psi can u safley put on a engine???
Then how many to raise a SUV??
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You don't need that much pressure for this. I'd guess that the air bag (exhaust bag?) has a contact area of 3, maybe 4 square feet. And it only has to hold about half the weight of the vehicle. So, 3.5 square feet = 500 square inches. For a 5000 lb SUV, it would have to lift about 2500 lbs. So thats only 5 pounds per square inch of pressure. Turbo chargers add several times that without much issue. But, if you're worried ... upgrade the exhaust system first with something thats a bit less restrictive. That would more or less counter the added back pressure of the bag.