straight pipe

[spikepuller]

i had 5" straight pipe installed and guy with an 2011 3500 dodge told me straight pipe does not allow any back pressure on turbo and it free spins unoiled when i turn it off. does anyone have any knowledge on this matter

[98whitelightnin]

A good turbo free spins when you turn the truck off anyway:cookoo:

[diesel4life]

Ive been running a full exhaust no muffler/ resonator for many yrs with no ill effects. I think back pressure would be a bad thing for the simple fact of higher egt's :shrug

[Mopar1973Man]

Straight pipe 3" with no issues. I don't see the need to even upgrade my 2002 to 4". My EGT's are very controllable even towing up steep grades.

[Wild and Free]

Tell him to pound sand, hes doesn't know what he is talking about.HMMMMMM yeah back pressure on an engine that is shut down, lets stop and think about that.....................

[flagmanruss]

My system with straight through 4inch "muffler" might as well have been straight pipe. The only problem was noise towing... sounded great running empty but that's not why I bought the truck! Yes tubos free spin after shut down... if you idle the truck & let it cool off before shut down, it should minimize the turbo spin after.

[Rogan]

As everyone else has stated, that's one of the dumbest things I've heard in awhile! :)There's no back pressure, because there's no 'front pressure'.. It's just spinning.. It's spinning no more or less than before the straight pipe installation, it's just probably a lot more noticeable (read: audible) now that there's no muffler to 'muffle' the sound.That guy doesn't deserve to drive a 2011 Dodge. He needs a Yugo.

[LiveOak]

I am running a 5 inch turbo back pipe and have had no problems for several years. Yes the turbo spins down at shut down but not for much more than a few seconds. I always idle the engine until the EGT is below 300 before shutting the engine down. The turbo will be a LOT happier that way.

[AH64ID]

Other than a 3rd gen with a stock manifold/turbo sounding like a wet goose fart, you won't hurt a thing. The turbo does the same thing with or without a muffler.My turbo spins for 20+ seconds after shutdown