Drilling small drain holes in exhaust?
#179450
12/31/08 09:39 AM
12/31/08 09:39 AM
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Joined: Mar 2007
Posts: 3,277 West Coast, USA
jbc426
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If a guy drilled a few well-placed, very-small drain holes through the lowest spots of the exhaust system, would you hear them over the normal rumble and tumble of the car's engine etc, and would it help the longevity of the exhaust system?
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Drilling small drain holes in exhaust?
[Re: jbc426]
#179452
12/31/08 10:30 AM
12/31/08 10:30 AM
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Joined: Jan 2003
Posts: 2,936 Richmond, VA
VT_Dart
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I've seen many people do it on exhausts (including a lot of shops). Most of the time I see them pop a hole right in the lowest spot of the muffler. It has never made any noticeable sounding exhaust leak either.
Darrah Heath
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Re: Drilling small drain holes in exhaust?
[Re: Lefty]
#179456
12/31/08 01:13 PM
12/31/08 01:13 PM
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Joined: Aug 2003
Posts: 4,384 Madison Wi
NTOLERANCE
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Friend of mine drilled some into the exhaust collector on the headers of a chevy he had. Said it was an old trick from Cali to get a car to pass emmissions. It did get his car to pass. Seems to suck fresh air in.
I used to care but....... things have changed
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Re: Drilling small drain holes in exhaust?
[Re: jbc426]
#179460
01/01/09 12:16 PM
01/01/09 12:16 PM
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Joined: Mar 2007
Posts: 3,277 West Coast, USA
jbc426
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Thanks for all the great information. Now I gotta get under the car with a drill.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Drilling small drain holes in exhaust?
[Re: burdar]
#179464
01/01/09 03:46 PM
01/01/09 03:46 PM
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Joined: Mar 2007
Posts: 3,277 West Coast, USA
jbc426
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Any ideas on what size to use? Too small and it will plug, to big and it will be....well, too big.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Drilling small drain holes in exhaust?
[Re: jbc426]
#179465
01/01/09 05:14 PM
01/01/09 05:14 PM
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Anonymous
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Anonymous
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I beleive E'berg recommended an 1/8th".
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Re: Drilling small drain holes in exhaust?
#179466
01/02/09 01:29 PM
01/02/09 01:29 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
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About to go away
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my 87 Diplomat had them stock, never heard any extra noise on the stock system, doubt you'd heard it with a louder than stock muffler.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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