Im getting paid tomorrow - 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 16 Old 11-13-2008, 10:41 AM Thread Starter
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Im getting paid tomorrow

Hey guys since im getting paid tomorrow i am gonna do some work to my truck , mainly intake and exhaust. It already has true duals on it from the guy that owned it before me there dual 2.25 or 2.5 i believe, would it sound good with dual straight pipes? and as far as the intake goes im wondering if the big hump on the bottom of the top part of the breather is needed? (if that made sence haha) and also if the metal plate is needed in front of the air inlet?




Thanks

1991 Ford F250 Lariat
Ext. cab. Long Bed
81k original miles
True dual exhaust
Pump advanced
Sittin on 33's
7.3 IDI
4x4


1996 Ford Probe GT-ZE
JSPEC KLZE
2.5 24v DOHC V6
2800lb car+225hp=:burnout
True CAI
Magnaflow Cat Back Exhaust
2 10" Kenwood Excelon Subs
1800w Kenwood Mono Amp

Last edited by International-Harvester91; 11-13-2008 at 10:44 AM.
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post #2 of 16 Old 11-13-2008, 11:24 AM
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I'm not sure how your exhaust is run. I changed my true duals to a 4" single with a 3"dp and it made a big difference. The old duals twisted and turned all over the place and were much more restrictive than I had originally thought.

I got mine from Farmboys here at the forum.

Brad
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post #3 of 16 Old 11-13-2008, 01:16 PM Thread Starter
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mine are run fairly straight so i dont think flow would be an issue since its not a turbo but i was just wondering about the sound

1991 Ford F250 Lariat
Ext. cab. Long Bed
81k original miles
True dual exhaust
Pump advanced
Sittin on 33's
7.3 IDI
4x4


1996 Ford Probe GT-ZE
JSPEC KLZE
2.5 24v DOHC V6
2800lb car+225hp=:burnout
True CAI
Magnaflow Cat Back Exhaust
2 10" Kenwood Excelon Subs
1800w Kenwood Mono Amp
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post #4 of 16 Old 11-15-2008, 06:58 AM Thread Starter
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i know usually this section doesnt get checked too much, but do not straight pipe a non turbo 7.3 it sounds like a machine gun its horrible

1991 Ford F250 Lariat
Ext. cab. Long Bed
81k original miles
True dual exhaust
Pump advanced
Sittin on 33's
7.3 IDI
4x4


1996 Ford Probe GT-ZE
JSPEC KLZE
2.5 24v DOHC V6
2800lb car+225hp=:burnout
True CAI
Magnaflow Cat Back Exhaust
2 10" Kenwood Excelon Subs
1800w Kenwood Mono Amp
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post #5 of 16 Old 11-15-2008, 07:12 AM
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That bad huh? Got any way to post a sound clip of it, I'm curious to hear it?

'05 F250, CC, FX4, 6.0 PSD
sct x4
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post #6 of 16 Old 11-15-2008, 07:20 AM
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I've got a friend with a non turbo roll back. It has a straight pipe and sounds like a gas V-8. Very obnoxious if you ask me

Eric@Powerstroke.org

Early 99 F250 with a bunch of extra junk...
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post #7 of 16 Old 11-15-2008, 07:33 AM
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Its super obnoxious sounds like a gasser with stacks.


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post #8 of 16 Old 11-15-2008, 08:11 AM
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yeah i friend had a 93 with straights and it was loud and obnoxious like a big block gasser

Name-Troy Lincoln
96 F-250 4X4 stroked xcab shortbed 5 speed
01 EXCURSION LIMITED 4X4 V-10 brute force intake dual exhaust
02 EXCURSION LIMITED 4X4 stroked ts 6 position 4" dp and duals hers now
06 F-250 4x4 6.0 auto lariat crew cab short bed Dads ride
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post #9 of 16 Old 11-15-2008, 02:16 PM Thread Starter
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yeah it sounded exactly like a gasser very poppy, and horrible lol nah i cant get a sound clip because i took it right back and had my mufflers put back on lol

1991 Ford F250 Lariat
Ext. cab. Long Bed
81k original miles
True dual exhaust
Pump advanced
Sittin on 33's
7.3 IDI
4x4


1996 Ford Probe GT-ZE
JSPEC KLZE
2.5 24v DOHC V6
2800lb car+225hp=:burnout
True CAI
Magnaflow Cat Back Exhaust
2 10" Kenwood Excelon Subs
1800w Kenwood Mono Amp
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post #10 of 16 Old 11-15-2008, 08:00 PM
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A straight piped N/A diesel will sound as loud as a straight piped gasser, really fricking loud. You really need a turbo to cut down on the noise, thats why they are quieter.

Now that loud popping sound is what us IDI'ers call "cackling." My truck will cackle with 4" exhaust at high rpm's, but its a really deep cackle, and when engine braking sounds like a jake brake, otherwise high rpm's sounds like a big block gasser (sounds good ). The bigger the exhaust pipe, you will recieve less of the cackle sound and the sound will get deeper (better IMHO).

I wouldnt straight pipe it unless you live in an area that cops dont patrol much, cause you will get ticketed for it.

-Justin-
1985 Ford F-250 with a 6.9 IDI/T-19 4speed 4x4
Paint, Eagle Alloys, Kelly Safari TSR's, ATS turbo, gauges

2004 Jetta TDI 5 speed
2004 2wd Excursion Limited 6.0. Testing how loyal I am to Ford
1997 Passat B4V TDI. 1 of 80 imported in 97. 50 MPG and a factory 25 gallon fuel tank!
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