truck loudness - Ford Powerstroke Diesel Forum
 
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post #1 of 10 Old 09-14-2009, 04:33 PM Thread Starter
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truck loudness

I have a question about the exhaust loudness of the obs trucks... i have a '96 f250 with the 3.5 inch stock exhaust except for a gutted cat and a muffler delete... my buddy has a 2002 super duty 7.3 and he just has a muffler delete and his truck is easily twice as loud as mine from idle to higher rpms... his has that blat at higher rpm's that mine doesnt.. so my question is... why is there such a difference? Could it be my pancake shaped downpipe? both trucks have chips and intakes
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post #2 of 10 Old 09-14-2009, 04:45 PM
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down pipe would be a good reason, also do you have the stock intake box on yours still? If you do, then do a DIY intake using the napa filter and it makes some difference too.

99 F350 CCLB 67k miles.

Sold: 01 Dodge cummins ECLB a few more mods to 353hp

Sold: 97 F250 SCLB, 5 speed 2wd. minor mods to 327hp

See a pattern? next I will have to find one of those 6 door jobbers...
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post #3 of 10 Old 09-14-2009, 04:59 PM Thread Starter
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I have a DIY intake on mine already... he has a K&N on his superduty
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post #4 of 10 Old 09-14-2009, 05:44 PM
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mine is the oppsite, my buddy has a 99 superduty and his truck sounds terrible compared to mine

2001 cummins.....100 HP sticks, edge drag comp, lift pump, exhaust, silencer ring MIA mod, .093 lines, .093 tubes intake, nice new paint and a pretty valve cover
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post #5 of 10 Old 09-14-2009, 06:07 PM Thread Starter
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what do you have leading up to your stack?
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post #6 of 10 Old 09-14-2009, 06:11 PM
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My OBS is just as loud if notlouder than most straight piped SDs. It has the 3" downpipe, to a short 4" section and then 5" from under the cab to the stacks.

Nick, BPS Historian
1995 F-250 4x4 7.3 Powerstroke
Isspro Gauges, Tony Wildman Tunes, PSGH Stage 1 Injectors, Early 99 Intercooler, ATS Stage 6 E4OD, TCI Tranny Cooler, Snow Water/Meth, Traction Bars, EBPV Brake, TC Lockup Switch, Spray-on Liner, K&N Intake w/ NAPA 6637 Filter, 3" downpipe, 5" mitre stacks.
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post #7 of 10 Old 09-14-2009, 06:11 PM
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regular downpipe then it went to 4 inch piping straight to the stack, thats all

2001 cummins.....100 HP sticks, edge drag comp, lift pump, exhaust, silencer ring MIA mod, .093 lines, .093 tubes intake, nice new paint and a pretty valve cover
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post #8 of 10 Old 09-14-2009, 06:16 PM Thread Starter
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hmmmm i think i need a new downpipe
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post #9 of 10 Old 09-15-2009, 03:20 AM
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Definitley need a new downpipe. The stock, flattened DP that came on the OBS trucks is POO. I'm working on getting a 3" DP for my truck, as I already have a 4" exhaust. I'm probably going to get one from Performance Truck Products Diamond Eye 3" Down-Pipe Kit 94-97 7.3L Ford (Aluminized) | Exhaust Components | 94-97 7.3L Power Stroke | Ford Power Stroke | Diesel Power | Performance Truck Products

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Early 1995 F-350 Crew Cab Long Bed
33" Hankook RT03 Muders
DIY Intake w/ Napa 6637 filter
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post #10 of 10 Old 09-15-2009, 06:39 AM
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My truck sounds good I think. But if you are going to put a down pipe in there a real pain in the a$$

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