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05-26-2012, 07:34 PM | #1 |
Registered User
Join Date: Mar 2012
Location: Clemson SC
Posts: 10
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Exhaust turndowns behind cab
I just did a cam swap in my 350 and am thinking about doing something different with the exhaust. It currently has two flowmaster 40s that run all the way out the back. I was thinking about dumping it with turndowns right behind the cab. Has anyone done this? Any input is appreciated
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05-26-2012, 07:38 PM | #2 |
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Join Date: Nov 2011
Location: Valparaiso, Indiana
Posts: 195
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Re: Exhaust turndowns behind cab
Thata about 90% of my vehicles lol. Its louder and has some drone, I dont mind it though.
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05-26-2012, 08:21 PM | #3 |
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Join Date: Dec 2011
Location: Arlington WA
Posts: 1,728
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Re: Exhaust turndowns behind cab
i have summit welded mufflers and they dont drone but when i had them dump under the bed they sure did. personally i hate drone, i think flowmasters dumping under the bed would just about drive me crazy
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GMC C15 355 SM465 3.73 80 C10 cruiser build thread 79 short stepside crew cab. big and ugly. build thread |
05-26-2012, 11:24 PM | #4 |
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Join Date: May 2012
Location: Visalia CA
Posts: 118
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Re: Exhaust turndowns behind cab
yep, done it several times and this is what ive found..
1:the drone gets annoying, esp on the first date. 2: angle the tips outward to avoid dirt being thrown up everywhere, still tho, its gonna kick up dust all over ur truck. 3: if u have a sliding rear window, forget about using it, the exhause gasses get sucked up between the cab and bed and right into that back window... would i do it again knowing all this??? yes, 1:i have a gf for almost 5 years now, so if she shuts up its better for me 2: frame and underbody is all bed linned so dirt somes right off, body is currently primer so oh well. 3: no sliding rear windo. my advise: go dual 3" dumps, mind as well, 2.xx" are just a waste if u as me, do it once do it right..... may wanna use these??? but beware theyre loud! but for performance, AWESOME (flowmaster purple hornies 3" flange to 3" dump standard leant NON JEEP |
05-27-2012, 02:24 AM | #5 |
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Join Date: Dec 2011
Location: Arlington WA
Posts: 1,728
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Re: Exhaust turndowns behind cab
yea you may not notice the drone but when some one else drove my truck it was loud as crap. when i drove i dint notice it as much
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GMC C15 355 SM465 3.73 80 C10 cruiser build thread 79 short stepside crew cab. big and ugly. build thread |
05-27-2012, 03:11 AM | #6 |
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Join Date: Jun 2010
Location: Lafayette , La
Posts: 404
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Re: Exhaust turndowns behind cab
flowmasters will drone like crazy dumped. I had to get rid of mine
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1966 Chevy C10 Stepside 355ci sbc with 3speed OD 2021 GMC Sierra 1500 AT4 6.2 1980 Chevy Camaro z28 383ci 1990 Chevy Suburban 350 tbi 2x4 (sold) 1984 Chevy C10 sliverado short fleet 1997 Chevy C1500 short fleet |
05-27-2012, 07:45 AM | #7 |
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Join Date: Mar 2012
Location: Clemson SC
Posts: 10
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Re: Exhaust turndowns behind cab
Thanks for the advice everyone. I think i might look into some glasspacks. Anything to get rid of the flowmasters
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05-27-2012, 11:10 AM | #8 |
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Join Date: Mar 2012
Location: Woodbury, Ct.
Posts: 1,699
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Re: Exhaust turndowns behind cab
2.5" tailpipes and resonators in front really took away the drone from my flowmasters..
Especially after I fixed the lockup converter...no cab insulation yet..coming soon. Posted via Mobile Device |
05-28-2012, 12:17 AM | #9 |
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Join Date: Oct 2011
Location: oakdale ca
Posts: 552
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Re: Exhaust turndowns behind cab
i had 40 series with dumps like right behind my cab they were turned out alil and it didnt have much drone and sounded mean lol but when it did drone it was annoying as hell lol
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05-28-2012, 05:07 PM | #10 |
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Join Date: Nov 2011
Location: So. Calif
Posts: 305
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Re: Exhaust turndowns behind cab
The previous owner of my 74 truck put turn downs right behind the cab and its pretty loud on mine. I plan on running the pipe out the back, gets annoying afterwhile. Mabye right behind the tires I think.
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05-28-2012, 06:00 PM | #11 |
BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: Exhaust turndowns behind cab
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05-28-2012, 06:21 PM | #12 |
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Join Date: Sep 2009
Location: ottawa,canada
Posts: 4,550
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Re: Exhaust turndowns behind cab
flowmaster super 44's, scavenger x-over pipe, all 3".....dump in front of the axle, no turn downs.....
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my build threads '86 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415628 '67 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=635078 '63 GMC http://67-72chevytrucks.com/vboard/s...d.php?t=674682 |
05-29-2012, 12:20 AM | #13 |
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Join Date: May 2012
Location: Anderson SC
Posts: 30
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Re: Exhaust turndowns behind cab
This is how I did mine - ran a short length from the headers to Warlock Racing Mufflers, took the blocking flange off the muffler and bolted on QTEK electric cut-outs, then Summit turn downs. Since summit turn downs are bolt-on, they are adjustable as far as what angle you want them blowing out. All this happens about a foot or two before the rear axle, which is still pretty close to the cab. This way all the tone is at the flick of a switch, depending on my mood. And since it isn't directly behind the cab I can still get fresh air from the sliding rear window. The thick metal construction of the mufflers also reduces vibration in the cab.
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05-29-2012, 11:21 PM | #14 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Exhaust turndowns behind cab
not behind the cab but close
305 2B ,manifolds to flowmaster 40s with a crossover @ 2.25 cleared out the stock manifolds too sounds good to me,with no radio speakers thats all I hear i went with 2.25 so i get sound without it always haveing to hit it to the floor but not as loud as the 350 /cherry bombs on the 4X4 tho
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