Re: Back pressure
I think the only way to really harm a motor in the backpressure sense is to run the motor with no manifolds or headers, just straight out of the heads, sounds cool though
. the only car i've experienced that really needs back pressure is a honda 4 banger, with an open header that little crx fell flat on its face, hook the exhaust back up(factory cat and fart pipe) and it would wind right up and go like hell(for a honda at least). i think newer cars are designed for more back pressure because they come with cats but the old iron never had to worry about that.
68 Ford Country Sedan Wagon-390 FE, C6, 9 Inch
87 Chevy Caprice Classic Wagon-307, 2004R, 10 Bolt, what can i say, i grew up with that car