New exhaust sounds to poppy like glasspacks - The 1947 - Present Chevrolet & GMC Truck Message Board Network

KrazyAz · 09-28-2009, 07:42 PM

Hi 2 all.hopefully someone will have an answer to my problem.I just installed a set of custom built headers. 1.75" 16g tubing and new 2.5" 16g tubing with delta 40 flowmaster mufflers.The exhaust dumps out the sides behind the back wheels on my longbed.At idle it sounds great.Accellerating it begins sounding very poppy like glass packs.The old exhaust with same flowies sound throaty from idle to top speed.Old exhaust exited the rear of truck and was almost straight tube all the way back.The new exhaust has a u bend over axle then a 90 to exit the sides of the truck.Are the bends causing the poppyness?If not then what might it be?thank you in advance for your help.

KrazyAz

cdowns · 09-28-2009, 08:13 PM

dump the blowmasters and you'll get rid of the garbage can sound

kamikazekyle05 · 09-28-2009, 08:34 PM

mine makes that sound when u first start moving then it sounds mean, i have true dual flows dumped over the axle

heavy70 · 09-28-2009, 09:52 PM

I think its the bends in the pipe and added length..

airdale94 · 09-28-2009, 10:26 PM

Quote:

Originally Posted by heavy70

I think its the bends in the pipe and added length..

Flowmaster use to put a notice of this happening in their instructions. It's a result of unburned fuel igniting in the exhaust. You might try leaning your fuel a tad.

Don't want to lean to much though. Cause other problems.

texanidiot25 · 09-28-2009, 10:27 PM

H pipes tend to reduce it.

dznucks · 09-29-2009, 08:17 AM

yes, i agree, H pipes will help.

i had glasspacks and duals with no crossover and it popped like that until i put on the h-pipe.

big mike71 · 09-30-2009, 06:33 PM

I have flowmasters and a H-pipe and it sound great.

Chevyman680063 · 09-30-2009, 07:22 PM

I agree with what some of the others have said...sounds like you need an H or X-pipe. My friend has Flowmasters on his 87 and before he had an H-pipe installed they did that. It sounds really nice and smooth now.

09-28-2009, 07:42 PM	#1
KrazyAz Registered User Join Date: Sep 2009 Location: Phoenix,Arizona Posts: 43	New exhaust sounds to poppy like glasspacks Hi 2 all.hopefully someone will have an answer to my problem.I just installed a set of custom built headers. 1.75" 16g tubing and new 2.5" 16g tubing with delta 40 flowmaster mufflers.The exhaust dumps out the sides behind the back wheels on my longbed.At idle it sounds great.Accellerating it begins sounding very poppy like glass packs.The old exhaust with same flowies sound throaty from idle to top speed.Old exhaust exited the rear of truck and was almost straight tube all the way back.The new exhaust has a u bend over axle then a 90 to exit the sides of the truck.Are the bends causing the poppyness?If not then what might it be?thank you in advance for your help. KrazyAz

09-28-2009, 08:13 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: New exhaust sounds to poppy like glasspacks dump the blowmasters and you'll get rid of the garbage can sound __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

09-28-2009, 08:34 PM	#3
kamikazekyle05 Registered User Join Date: Nov 2007 Location: Vernon, Texas Posts: 331	Re: New exhaust sounds to poppy like glasspacks mine makes that sound when u first start moving then it sounds mean, i have true dual flows dumped over the axle

09-28-2009, 09:52 PM	#4
heavy70 Registered User Join Date: Dec 2007 Location: choctaw, oklahoma Posts: 100	Re: New exhaust sounds to poppy like glasspacks I think its the bends in the pipe and added length..

09-28-2009, 10:27 PM	#6
texanidiot25 Eat My Rust Join Date: Jan 2007 Location: Cypress, Texas Posts: 3,362	Re: New exhaust sounds to poppy like glasspacks H pipes tend to reduce it.

09-29-2009, 08:17 AM	#7
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	Re: New exhaust sounds to poppy like glasspacks yes, i agree, H pipes will help. i had glasspacks and duals with no crossover and it popped like that until i put on the h-pipe.

09-30-2009, 06:33 PM	#8
big mike71 Registered User Join Date: Mar 2009 Location: independence mo Posts: 2,111	Re: New exhaust sounds to poppy like glasspacks I have flowmasters and a H-pipe and it sound great. __________________ I'm not as good as I once was, But I'm as good once as I ever was.

09-30-2009, 07:22 PM	#9
Chevyman680063 Registered User Join Date: Aug 2006 Location: Georgia Posts: 850	Re: New exhaust sounds to poppy like glasspacks I agree with what some of the others have said...sounds like you need an H or X-pipe. My friend has Flowmasters on his 87 and before he had an H-pipe installed they did that. It sounds really nice and smooth now.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.