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02-13-2015, 12:23 PM | #1 |
Registered User
Join Date: Oct 2014
Location: panama city, fl
Posts: 204
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Re: what exhaust are you running?
my truck is at the exhaust shop right now. Getting it done from the manifolds back with flowmaster 40s. Not sure what it's going to sound like. Doing true duals.
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02-13-2015, 01:01 PM | #2 | |
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Join Date: Apr 2010
Location: Guntersville Alabama
Posts: 1,073
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Re: what exhaust are you running?
Quote:
It will be loud and have drone . If you like loud that's ok . But if not you may want to call them . |
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02-13-2015, 03:23 PM | #3 |
Registered User
Join Date: Oct 2014
Location: panama city, fl
Posts: 204
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Re: what exhaust are you running?
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02-13-2015, 03:38 PM | #4 |
Senior Member
Join Date: Aug 2004
Location: Everett, WA
Posts: 2,316
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Re: what exhaust are you running?
I notice a few of you are going big pipe into muffler and then scaling down after; is there a reason for this?
Also, I have had FM's give drone, and some that didn't. Would placement help with this? If you had your mufflers as far back as possible, just before the pipe turns to go up and over the rear axle, so the mufflers are not directly under the cab. I have a crew that needs exhaust and was planning on going with FM's...
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2009 Honda Fit CfC (bsf 44.9 mpg) 2000 Tahoe Limited 1991 GMC CrewCab Dually 2wd, will end up swb, not dually and replace CCswb below 1991 GMC CrewCab Dually 4x4, just going to fix things up for now 1982/1989 K5/GMC Jimmy 2wd 1987 GMC 1/2 ton swb 2wd Crew (sold) |
02-13-2015, 05:09 PM | #5 |
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Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,072
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Re: what exhaust are you running?
Flow/sound related for me. I wanted minimal flow restrictions leaving the motor & through the mufflers. After the mufflers the exhaust pressure drops so downsizing pipe size doesn't impact flow & it helps reduce the noise level.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
02-15-2015, 06:45 PM | #6 |
Senior Member
Join Date: Jul 2000
Location: North Texas
Posts: 3,601
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Re: what exhaust are you running?
Much of the exhaust energy is given up in the mufflers, meaning a smaller pipe can be used after the mufflers with no loss of power. Very common for car and truck mfrs to do this.
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Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
02-13-2015, 03:50 PM | #7 |
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Join Date: Apr 2014
Location: Bloomington Indiana
Posts: 1,041
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Re: what exhaust are you running?
It won't be that loud. There will be some drone, mostly at 40 mph constant speed. I have FM 40s on my DD, and it doesn't bother me at all.
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Rich Weyand 1978 K10 RCSB DD. |
02-13-2015, 01:37 PM | #8 |
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Join Date: Oct 2014
Location: Spearfish South Dakota
Posts: 407
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Re: what exhaust are you running?
Glass pacck dumped out in front rear axle Thank God its only a 6 banger. Resonates under box bad going to extend it out back soon.
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02-13-2015, 04:17 PM | #9 |
Registered User
Join Date: Oct 2014
Location: panama city, fl
Posts: 204
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Re: what exhaust are you running?
Just picked it up. Sounds pretty good. Quiet at idle and not super loud while driving. Sounds good.
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02-13-2015, 09:02 PM | #10 |
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Join Date: Jul 2014
Location: Winston-Salem, NC
Posts: 561
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Re: what exhaust are you running?
What did it cost you gasmn1620?
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02-14-2015, 01:37 AM | #11 |
Registered User
Join Date: Jan 2013
Location: Newalla, OK
Posts: 600
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Re: what exhaust are you running?
flows only because I already had them
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02-14-2015, 08:51 PM | #12 |
Registered User
Join Date: Oct 2014
Location: panama city, fl
Posts: 204
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Re: what exhaust are you running?
$325. True duals with turn downs right in front of the axle.
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02-14-2015, 09:36 PM | #13 |
Registered User
Join Date: Nov 2011
Location: wichita falls TX
Posts: 28
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Re: what exhaust are you running?
I have a mild 350 with pypes race pro mufflers with 2 1/2 in tubes running all the way out the back then turned down at the rear wheels on my 85 and they are nice sounding. No drone at all and they are nice at crusing speed, but sound mean when you get on it.
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02-15-2015, 09:32 AM | #14 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: what exhaust are you running?
some pics
all pipes are 2.25 mufflers on the grass are dynomax turbos (78 C Burb) others are cherry bombs (78 K Jimmy) and Flow masters(79 C Jimmy) the 78 K now has the turn downs after the bombs
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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