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Old 04-24-2010, 07:19 PM
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8" stack?

i found 8"stack online and really want to do them i want 2 with a 5" ypipe... i plan on puting in a bigger down pipe also, but someone said not to because it might not run right because pressure wont be right... what should i do?
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Old 04-24-2010, 07:49 PM
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The pressure? Did your cummins buddy tell you that? Or some kid with a honda.

These are turbo diesels. We get our back pressure from the turbo. If there is any difference, I doubt you will notice it.
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Old 04-24-2010, 09:36 PM
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I will tell you that I have a 3" dp with about 3 ft of 4" and then into 5" all the way out to my dual 8" miters and the truck runs great. No muff, no kitty. We do not need back pressure like a gasser. My brother is a master diesel tech and he just says a diesel engine is a big air pump, the more you get in and the more you get out, the more power you can make. Obviously limited by fuel and oil delivery, but no need for backpressure. OPEN IT UP!
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Old 04-25-2010, 05:07 PM
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i thought soo... thanks to all, and dieselmaster. you truck is sexy haha.and do you blow smoke from the stacks? i have a superchip and no kitty and no smoke
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Old 04-25-2010, 05:11 PM
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I blow a little bit of smoke with my chip in the high stting. Nothing too major, but it will leave a little bit of a haze. All my internals are stock though(so far hehehe) so I don't expect too much smoke yet. This year should be my year for new sticks, new turbo, intercooler, studs, gear vendor overdrive and ?????
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Old 04-25-2010, 05:24 PM
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lol yea i dont paln on anything major... just the stacks i have a chip and coldair.. iam only 17 and it has 303000 miles and iam only 17 so iam just doing **** thats cheap and looks good
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Old 04-25-2010, 05:28 PM
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good for you man....nothing wrong with keeping it simple and doing what you can, when you can. have had my truck for 5 years and just got back in to a spot where I can put some more money into her. She only has 167000 on the clock, so she is a baby compared to yours. Will get some new pics up with the stacks soon.
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Old 04-25-2010, 05:36 PM
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nice nice...ive had mine for a little over a year, i scored ittt... 3500. it needed a little workk.. i needed tyrods like 3 months ago.. and brakes last sumer but other than that shes my baby lol.. and she has a littlle rot
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