Exhaust question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70GMCer · 08-12-2005, 07:13 PM

I'm trying to find out what kind of exhaust system to put on my truck. I have a 350 w/350turbo and Hedmen Headers, mild cam and ported head work. I'm wanting duals straight back and exit at the back of the rear tires. I believe that is the stock location. What I'm trying for, is the exhaust to have that tinny sound at low idle and a nice throaty sound going down the road. I don't want this too loud or sounding like a "Moon Shine Runner's" car from down south, {nothing against the South

}. Someone told me that using Flowmasters and aluminized pipe give that tinny sound I'm lloking for. Also will 2 1/4" piping be a good choice?

Sweet72 · 08-12-2005, 07:21 PM

That's how some people describe "that flowmaster sound". TINNY.

69 longhorn · 08-12-2005, 07:33 PM

if you like to keep the noise down a bit, you might look at a set of 50's flows(3 chamber). I tried the 40's , & didnt like them, they were too loud on the hyway, with that annoying drown. I switched to the 50's, & they sound nice with 2 1/2 " pipe/H pipe. 2 1/4 would be plenty on pipe size on a mild 355....you can get by with 2 1/2, but I wouldnt go any bigger(bigger is louder!) mine run straight out the back, not loud enough to be a "cop caller", but can be heard when standing on the loud peddle

......69L

70GMCer · 08-12-2005, 08:44 PM

that's what I'm most likely looking for......How do they sound at idle.....I do like that tinny sound some exhaust make. Can really hear the cam working.....

matthufham · 08-12-2005, 08:53 PM

remember this delta flow is quieter, so when you go for your 40 series mufflers, yes you will, don't get delta flow. also 2" will work but 2 1/4" is always better, 2 1/2" is too much.

69 longhorn · 08-12-2005, 11:10 PM

The Delta flows are said to be quieter? I have the old 50's flows , so I cant say for sure. mine do still have that flowmaster "tin sound" @ idle, but imo a better sound than the original 40's flows when you stand on it......not quite as loud, but very throaty

we have all heard way too much of that "Rustang" with the 40's flows....he!! , we all have a belly button , right?

crazyL

70GMCer · 08-13-2005, 07:05 AM

That's why I ask the "Pros" on here........thanks.........

08-12-2005, 07:13 PM	#1
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	Exhaust question I'm trying to find out what kind of exhaust system to put on my truck. I have a 350 w/350turbo and Hedmen Headers, mild cam and ported head work. I'm wanting duals straight back and exit at the back of the rear tires. I believe that is the stock location. What I'm trying for, is the exhaust to have that tinny sound at low idle and a nice throaty sound going down the road. I don't want this too loud or sounding like a "Moon Shine Runner's" car from down south, {nothing against the South }. Someone told me that using Flowmasters and aluminized pipe give that tinny sound I'm lloking for. Also will 2 1/4" piping be a good choice? __________________ 1997 GMC Sierra Ext 1965 Mustang Last edited by 70GMCer; 08-12-2005 at 07:14 PM.

08-12-2005, 07:21 PM	#2
Sweet72 Registered User Join Date: Nov 2003 Location: Alexandria, VA Posts: 1,534	That's how some people describe "that flowmaster sound". TINNY. __________________ '72 GMC SWB C1500 Custom, frame-off in progress. 383 SBC, 9:1CR, Comp Cams XE262H, Scat internal balanced crank, Eagle SIR 6" rods, Keith Black dish pistons, Dart Iron Eagle 72/180 heads, Weiand Stealth intake, Stewart stage I water pump, Holley 4bbl vac sec, TH350 with B&M Shift Improver Kit. 12 bolt positraction. Last edited by Sweet72; 08-12-2005 at 07:22 PM. Reason: sarcasm

08-12-2005, 07:33 PM	#3
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	if you like to keep the noise down a bit, you might look at a set of 50's flows(3 chamber). I tried the 40's , & didnt like them, they were too loud on the hyway, with that annoying drown. I switched to the 50's, & they sound nice with 2 1/2 " pipe/H pipe. 2 1/4 would be plenty on pipe size on a mild 355....you can get by with 2 1/2, but I wouldnt go any bigger(bigger is louder!) mine run straight out the back, not loud enough to be a "cop caller", but can be heard when standing on the loud peddle ......69L __________________ http://community.webshots.com/user/hotrodhorn

08-12-2005, 08:44 PM	#4
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	that's what I'm most likely looking for......How do they sound at idle.....I do like that tinny sound some exhaust make. Can really hear the cam working..... __________________ 1997 GMC Sierra Ext 1965 Mustang

08-12-2005, 11:10 PM	#6
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	The Delta flows are said to be quieter? I have the old 50's flows , so I cant say for sure. mine do still have that flowmaster "tin sound" @ idle, but imo a better sound than the original 40's flows when you stand on it......not quite as loud, but very throaty we have all heard way too much of that "Rustang" with the 40's flows....he!! , we all have a belly button , right? crazyL __________________ http://community.webshots.com/user/hotrodhorn

08-12-2005, 08:53 PM	#5
matthufham Registered User Join Date: Feb 2005 Location: Carl Junction, Missouri Posts: 2,061	remember this delta flow is quieter, so when you go for your 40 series mufflers, yes you will, don't get delta flow. also 2" will work but 2 1/4" is always better, 2 1/2" is too much.

08-13-2005, 07:05 AM	#7
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	That's why I ask the "Pros" on here........thanks......... __________________ 1997 GMC Sierra Ext 1965 Mustang



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