MODIFYING STOCK MUFFLER
Safety Car
Joined: Oct 1999
Posts: 4,679
Likes: 2
From: Honolulu HI
Re: MODIFYING STOCK MUFFLER (corvette90)
Yes, it sounded a lot like the Flowmasters I now have. I often wondered if I just wasted $300 on them. The original mufflers with 1" holes seemed to be just as good on sound and performance.
Larry
Larry
Pro
Joined: Jun 2001
Posts: 583
Likes: 0
From: Asheville NC
Re: MODIFYING STOCK MUFFLER (Bigjo-NH)
I also have a 91 Vette..............
I hear you say that it sounds good cutting a 1" hole in the dummy side of the stock muffler....but are there ANY reasons NOT to cut the stock muffler??
Let me know! Would like to know if this is :bs . OR NOT??
I hear you say that it sounds good cutting a 1" hole in the dummy side of the stock muffler....but are there ANY reasons NOT to cut the stock muffler??
Let me know! Would like to know if this is :bs . OR NOT??
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Pro
Joined: Jun 2001
Posts: 583
Likes: 0
From: Asheville NC
Re: MODIFYING STOCK MUFFLER (Smash)
Seriously guys......any reason NOT to cut the 1" hole in the dummy side of the stock muffler?? Waht could possibly happen?? I need a serious reply to this tip! After all.....if it did work....I woould have functional dual tips, more sound as I will be gutting the cats at the same time, and more flow..RIGHT??
Let me know! :chevy
Let me know! :chevy
Pro
Joined: Apr 2001
Posts: 744
Likes: 13
From: Lenoir City TN
Re: MODIFYING STOCK MUFFLER (KNCRSR5R)
I have a 91 that I just did it on last weekend. Mine has a small tube that came out of the center of the plug. I took a hole saw and just cut thru the metal. This created a ring cut that was only as wide as the hole saw itself. It made a big difference is the sound, but not to loud. I have not noticed any resonance either. If you wanted more you could get a smaller hole saw and cut out the remainder around the tube. This tube is there to allow enough hot gases to enter that tip to keep water etc from puddling. It is connected back in the muffler somehow and will not come out by doing the cutting I just described. Can't tell if it helped on the HP, but sure sounds better. I haven't noticed any problems from doing this. Good Luck!
Burning Brakes
Joined: Apr 2001
Posts: 904
Likes: 0
From: Langley, BC, Canada
Re: MODIFYING STOCK MUFFLER (KNCRSR5R)
I just did this tonight..i drilled a pair of holes at the pipe entrance on the muffler..so the gas can escape before it enters the chamber..sounds great, now it growls and gurgles 
Safety Car
Joined: Dec 1999
Posts: 4,691
Likes: 1
From: Framingham MA
Re: MODIFYING STOCK MUFFLER (KNCRSR5R)
Seriously guys......any reason NOT to cut the 1" hole in the dummy side of the stock muffler?? Waht could possibly happen??
