how close is too close - The 1947 - Present Chevrolet & GMC Truck Message Board Network

shelby987 · 06-28-2006, 03:48 PM

how far away from the exhaust manifolds do I want to stay with either glass packs/cherry bombs/or flowmasters?
I wasn't sure how much damage the extreme heat will do to these products (yes, I am aware the exhaust is still pretty hot at the rear of the vehicle

) I just wanted to know if these products have a specific heat range that they will likely produce the most life.

Fred T · 06-28-2006, 04:31 PM

This is one of those "as far away as possible" responses. If you can, avoid mounting the mufflers under the cab, it will help cut down the noise. I have seen mufflers on fire trucks glowing after running a pump for an hour or so, the mufflers on those trucks lasted quite a while. But glass packs aren't known for longevity, most will lose their effectiveness after a couple years of operation.

Longhorn Man · 06-28-2006, 04:33 PM

Also, the further down the pipe, the less of a performance decrease you'll have from the mufflers.
Just a side note.

70rs/ss · 06-28-2006, 04:41 PM

I have mine mounted just in front of the rear axle. Flows can handle anything in that there is nothing to deteriorate, the glasspacks, thats a whole other story.

Longhorn Man · 06-28-2006, 04:48 PM

Quote:

Originally Posted by 70rs/ss

...Flows can handle anything in that there is nothing to deteriorate...

I had a 3 chaimber flowmaster on our old PSO S-10 Blazer, installed when it was still a great truck with 60,000 miles and running good. That muffler fell apart internally after 3 years. The baffles, or chaimbers or whet ever, came unmounted, and was blocking the exhaust. When neonlarry's son was here, I showed it to him (bummer he never comes on here anymore) I shook it and he heard the clunking, and you could see on the case where the chaimber walls were supposed to be, but you stick something into it and there's nothing there, onless y6ou tilt it to where that end was down, and it'd slide across.
I was pretty ticked considering it was an $80 muffler, and only lasted 3 years... and 2 1/2 of those years were in Tx. (can't blame the road salt)

70rs/ss · 06-28-2006, 05:11 PM

Flowmaster has a warrantee, I have a set on my Camaro, been there over 10-15 years and they look and sound great. I meant the don't blow out, but to come apart, I'd check with them about a new one, as with anything sometime stuff fails but it is safe to same short of coming aprt, they will not deteriorate over time like a GP.

Longhorn Man · 06-28-2006, 05:19 PM

I called them and they told me to get bent... and they almost used those words. The guy laughed and said;
"you want me to replace a 3 year old muffler.... why don't I just get you a new car while I'm at it."
This was back in 03... they haven't gotten a cent from me sence then.

06-28-2006, 03:48 PM	#1
shelby987 Registered User Join Date: Mar 2005 Location: Just outside Durham, NC Posts: 894	how close is too close how far away from the exhaust manifolds do I want to stay with either glass packs/cherry bombs/or flowmasters? I wasn't sure how much damage the extreme heat will do to these products (yes, I am aware the exhaust is still pretty hot at the rear of the vehicle ) I just wanted to know if these products have a specific heat range that they will likely produce the most life. __________________ 1969 SS 350 Camaro Sold 2008 1970 3/4T K20, stock height with 33's, 250 I6, 3 on the tree, and locked front and rear 4.10's 1980 Chevy Malibu 2 dr Sold 2007 1993 Olds. Cutlass Ciera Wagon Traded 2006 2003 Saturn L200 w/5pd. D/D My list spans 5 decades with One common thread.....GM!

06-28-2006, 04:31 PM	#2
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Re: how close is too close This is one of those "as far away as possible" responses. If you can, avoid mounting the mufflers under the cab, it will help cut down the noise. I have seen mufflers on fire trucks glowing after running a pump for an hour or so, the mufflers on those trucks lasted quite a while. But glass packs aren't known for longevity, most will lose their effectiveness after a couple years of operation. __________________ Fred There is no such thing as too much cam...just not enough engine.

06-28-2006, 04:33 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: how close is too close Also, the further down the pipe, the less of a performance decrease you'll have from the mufflers. Just a side note.

06-28-2006, 04:41 PM	#4
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,270	Re: how close is too close I have mine mounted just in front of the rear axle. Flows can handle anything in that there is nothing to deteriorate, the glasspacks, thats a whole other story.

06-28-2006, 05:11 PM	#6
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,270	Re: how close is too close Flowmaster has a warrantee, I have a set on my Camaro, been there over 10-15 years and they look and sound great. I meant the don't blow out, but to come apart, I'd check with them about a new one, as with anything sometime stuff fails but it is safe to same short of coming aprt, they will not deteriorate over time like a GP.

06-28-2006, 05:19 PM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: how close is too close I called them and they told me to get bent... and they almost used those words. The guy laughed and said; "you want me to replace a 3 year old muffler.... why don't I just get you a new car while I'm at it." This was back in 03... they haven't gotten a cent from me sence then.



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