Exhaust question.
Postmaster
Joined: Oct 2005
Posts: 3,724
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From: Clarksburg WV
I don't care for the sound of straight piped IDI's, I had mine like that for about a day and then put a muffler on it.
Right now I actually have a big Dynomax muffler under the truck (it's actually more like a resonator) and a Moroso spiral flow muffler in each stack. It's not too bad, but it still "thrums" a little much at certain RPM's in fifth gear if you have the rear slider open.
I really don't know how you guys with straight piped stacks can even stand to drive your trucks- even with a muffler mine gave me a headache on the highway, that's why I added the spiral flows.
Right now I actually have a big Dynomax muffler under the truck (it's actually more like a resonator) and a Moroso spiral flow muffler in each stack. It's not too bad, but it still "thrums" a little much at certain RPM's in fifth gear if you have the rear slider open.
I really don't know how you guys with straight piped stacks can even stand to drive your trucks- even with a muffler mine gave me a headache on the highway, that's why I added the spiral flows.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
What none of the videos show was deceleration.
Straight pipe an IDI, put a load on it and drop off of a decent hill engine braking.
From 3300 RPM down to about 2300 RPM the exhaust rap/cackle will rival any big truck Jake brake.
Straight pipe an IDI, put a load on it and drop off of a decent hill engine braking.
From 3300 RPM down to about 2300 RPM the exhaust rap/cackle will rival any big truck Jake brake.
Posting Guru
Joined: Dec 2009
Posts: 1,615
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From: Hagerstown, Md
Senior User
Joined: Jun 2010
Posts: 421
Likes: 1
from tractors to semis don't like mufflers on a diesel. we have straight piped our 400 cummins KW cabover at work and it is something to hear when you jerk 30k to 50k of sawdust out of our pits, make the metal on the side of building shake.
Postmaster
Joined: Jun 2008
Posts: 2,500
Likes: 2
From: Michigan
hells ya man! god i miss doing that...
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