7.3 idi exhaust - Ford Powerstroke Diesel Forum
7.3L IDI (Non-Powerstroke) Diesels Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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post #1 of 13 Old 05-03-2010, 11:36 AM Thread Starter
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7.3 idi exhaust

I have a 90 f250 7.3 idi and was wondering wut i should do for exhaust? i wanna straight pipe it but how does it sound good or bad would it hurt the engine since its non turbo?

FB: Kyle Durflinger

E99 F350 CCSB 4x4, Auto, All stock for now..., straight piped

1990 f-250 7.3idi 4x4 5 speed

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post #2 of 13 Old 05-03-2010, 11:39 AM
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I believe you will have to have some type of restriction as far as mufflers go because as you know there is no turbo to create backpressure on the motor.

Sam


2005 F350 King Ranch CC DRW Insight Leveled 4" MBRP Straight Pipe Tinted

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'99 Cummins - Sold
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post #3 of 13 Old 05-03-2010, 11:41 AM Thread Starter
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Tht is what i was thinking but i just didnt know im used to having turboed 7.3s lol

FB: Kyle Durflinger

E99 F350 CCSB 4x4, Auto, All stock for now..., straight piped

1990 f-250 7.3idi 4x4 5 speed

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Chevrolet = French word for non-hetero buttsecks.
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the wait for the coverage articles in DP is like waiting for a girl to put out for the first time....
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post #4 of 13 Old 05-04-2010, 04:31 AM
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i got mine strait piped with 2 5in stacks sounds great and it runs the same when it had mufflers.
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post #5 of 13 Old 05-04-2010, 06:34 AM
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There is a guy on youtube that has 3" exhaust with glass packs on his idi 7.3 I love the way it sounds but some may not. The audio gets a little distorted when he revs it. The truck is gorgeous though

Sam


2005 F350 King Ranch CC DRW Insight Leveled 4" MBRP Straight Pipe Tinted

'99 F250 - Sold
'99 Cummins - Sold
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post #6 of 13 Old 05-15-2010, 01:35 PM
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It will be way too loud without a turbo. Not bad for the engine but you will want to wear ear plugs.

Dont go over 3 or so inches or its just rediculous. Plus on those engines its not going to gain you any power.

Thad
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post #7 of 13 Old 05-17-2010, 06:18 AM
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i thought the same thing but mine is pretty quite for having 5in stacks. it was louder when it was 2.5 in strait piped.
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post #8 of 13 Old 05-17-2010, 11:28 AM
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Is your turbo'ed?


2003 F350 6.0 4x4 Crewcab Longbed SRW w/X Code Front Springs- 265/75R16's on it now. Still got the 285 retreads in the shed though.
Future modifications: Edge Insight CS, SCT X3 with Custom Tunes

-SOLD-
1994 F350 7.3 Banks Turbo IDI 4x4 Crewcab Longbed-Miss you old girl
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post #9 of 13 Old 05-17-2010, 08:29 PM
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nope but i hope to get one
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post #10 of 13 Old 05-18-2010, 12:48 AM
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Thats the single best thing I EVER did to my IDI!!!!

Thad


2003 F350 6.0 4x4 Crewcab Longbed SRW w/X Code Front Springs- 265/75R16's on it now. Still got the 285 retreads in the shed though.
Future modifications: Edge Insight CS, SCT X3 with Custom Tunes

-SOLD-
1994 F350 7.3 Banks Turbo IDI 4x4 Crewcab Longbed-Miss you old girl
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