? on flowmasters - The 1947 - Present Chevrolet & GMC Truck Message Board Network

79Silv4x4 · 04-09-2003, 03:55 PM

I have true duals with 40 series Flowmasters dumped before the rear axle but it's just not loud enough for me--it just doesn't sound like all of the other vehicles with Flowmasters that I have heard. The guy at the exhaust shop suggested that it was the smaller pipe leading to the mufflers that was causing this. The previous owner had these installed and the mufflers are 2.25 inch and the pipe leading to them is about 1.625--do you think going to dual 2.25 pipe would make this thing sound any better (louder, deeper)?

BigRed · 04-09-2003, 04:10 PM

I bet it would. Plus, you'd get much better flow out of them! If you have a 350, 2.25's will work great. I wouldn't want to go much smaller.

79Silv4x4 · 04-09-2003, 04:13 PM

Thanks, I do have a 350 so I guess I'll go with the 2.25s.

cochino12 · 04-09-2003, 05:02 PM

I have 2-1/2" from the headers into a flowmaster dual chamber in front of the rear tire and it's deafening

Tracy Focht · 04-09-2003, 06:16 PM

2.25" will barely make a difference in sound...do 2.50" for sure...that is what I did on my '81 SWB, 355 and cut off right before the back axle...would set car alrams off it was so loud. 2.25" won't be loud at all....better than now, but not deep and loud like you want.

Nvbowtie · 04-09-2003, 09:55 PM

your expecting deep sound (bass)

same theory as a bass speaker--- is it the size of a tweeter or a big bass drum - bigger more deep tone

My .02

Prerunner1982 · 04-10-2003, 01:00 AM

i run true dual 3" into 2 chamber flowmasters and like tracy says it can set off car alarms. i have had people tell me that at night they can hear me from about 1/2 mile away.

79Silv4x4 · 04-10-2003, 07:29 AM

Quote:

Originally posted by Prerunner1982
i run true dual 3" into 2 chamber flowmasters and like tracy says it can set off car alarms. i have had people tell me that at night they can hear me from about 1/2 mile away.

Who did your exhaust and how much was it? You mention 3 inch exhaust around here and they want major cash for that.

79BIG10 · 04-10-2003, 03:51 PM

I have 2.5" dual on mine with 40series. Check out my webapage for my sig to hear it. It's cumped like yours as well.

Prerunner1982 · 04-10-2003, 10:44 PM

79silv4x4, you will have to ask LOHRTBT about that. i got the whole set up including ceramic coated headers... $165.

04-09-2003, 03:55 PM	#1
79Silv4x4 Workaholic Join Date: Oct 2002 Location: Katy, TX Posts: 1,589	? on flowmasters I have true duals with 40 series Flowmasters dumped before the rear axle but it's just not loud enough for me--it just doesn't sound like all of the other vehicles with Flowmasters that I have heard. The guy at the exhaust shop suggested that it was the smaller pipe leading to the mufflers that was causing this. The previous owner had these installed and the mufflers are 2.25 inch and the pipe leading to them is about 1.625--do you think going to dual 2.25 pipe would make this thing sound any better (louder, deeper)?

04-09-2003, 04:10 PM	#2
BigRed Registered User Join Date: Jun 2002 Location: DFW, TX Posts: 1,680	I bet it would. Plus, you'd get much better flow out of them! If you have a 350, 2.25's will work great. I wouldn't want to go much smaller. __________________ Scott Shelbourne

04-09-2003, 09:55 PM	#6
Nvbowtie Registered User Join Date: Jul 2001 Location: Laughlin, Nv. USA Posts: 700	your expecting deep sound (bass) same theory as a bass speaker--- is it the size of a tweeter or a big bass drum - bigger more deep tone My .02 __________________ www.unlimited2u.com/chevy Bill 1980 Chevy C-10 Silverado 1988 Chevy Blazer Tahoe

04-10-2003, 01:00 AM	#7
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	i run true dual 3" into 2 chamber flowmasters and like tracy says it can set off car alarms. i have had people tell me that at night they can hear me from about 1/2 mile away. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call

04-10-2003, 03:51 PM	#9
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	I have 2.5" dual on mine with 40series. Check out my webapage for my sig to hear it. It's cumped like yours as well. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

04-09-2003, 04:13 PM	#3
79Silv4x4 Workaholic Join Date: Oct 2002 Location: Katy, TX Posts: 1,589	Thanks, I do have a 350 so I guess I'll go with the 2.25s.

04-09-2003, 05:02 PM	#4
cochino12 It followed me home? Join Date: Mar 2003 Location: Yup Posts: 5,751	I have 2-1/2" from the headers into a flowmaster dual chamber in front of the rear tire and it's deafening

04-09-2003, 06:16 PM	#5
Tracy Focht Registered User Join Date: Dec 1999 Location: Stillwater, OK 74075 Posts: 2,936	2.25" will barely make a difference in sound...do 2.50" for sure...that is what I did on my '81 SWB, 355 and cut off right before the back axle...would set car alrams off it was so loud. 2.25" won't be loud at all....better than now, but not deep and loud like you want.

04-10-2003, 10:44 PM	#10
Prerunner1982 Registered User Join Date: Oct 2002 Location: Edmond, OK Posts: 5,904	79silv4x4, you will have to ask LOHRTBT about that. i got the whole set up including ceramic coated headers... $165. __________________ Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call



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