Again with the exhaust...
#1
Again with the exhaust...
I am going to be putting exhaust on my truck and I was going to go with 5" straight pipe kit and add a Donaldson 51" muffler or a Farmboys kit/muffler. But I am now wondering if maybe I should only go 4"? I have not read much about it but I did see that one guy put 5" on a stock rig and LOST a bunch of power and hated it...Is this common or what? I know that 5" is way overkill unless your making big power or just want it stupid loud.I want it because I think it sounds the best (with the right muffler) But will it actually kill the power above 2500rpm? Anyone have any suggestions? Should I just go with 4" with the Donaldson? Keeping in mind that my truck is '03 standard output with no mods.
#2
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the power lost is minimal the sound will definitly be different. if you are running over 700 horse i think 5 inch helps but under that you will loose a little hp but nothing to worry about
#4
This other dude said his truck was just a pig with the 5" wouldn't get out of it's own way....I think he was going to take it off and he only had it on for a bit he hated it so much...I don't want to hate my exhaust that much. Is the HP loss noticible? Does it affect spooling?
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I went from stock to 5" turbo back Expandit kit with muffler. I noticed a little bit of loss on bottom end but top end improved. No loss that made the truck a dog by far, just barely noticeable. Decreased probably 200 deg on EGT too. My truck's stock except for a Quadzilla Mileage Module, & air filter. I recently went straight pipe - sounds awesome but horrible drone in cab. Just put a 30" muffler back on & like it much better. Almost stock sound. No difference in mileage or power between muffler or straight pipe. Really only reason I put 5" on my truck is the look, sure looks good.
#10
I went from stock to 5" turbo back Expandit kit with muffler. I noticed a little bit of loss on bottom end but top end improved. No loss that made the truck a dog by far, just barely noticeable. Decreased probably 200 deg on EGT too. My truck's stock except for a Quadzilla Mileage Module, & air filter. I recently went straight pipe - sounds awesome but horrible drone in cab. Just put a 30" muffler back on & like it much better. Almost stock sound. No difference in mileage or power between muffler or straight pipe. Really only reason I put 5" on my truck is the look, sure looks good.
#11
I don't understand how a bigger pipe could rob low end power on a turbo'd diesel. Its not like it needs to be set up to scavenge back through the cylinders like a carb'd engine. Anybody have any idea?
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Steven K
3rd Gen Engine and Drivetrain -> 2007 and up
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06-04-2009 10:32 AM