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01-15-2012, 08:41 PM
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#1 |
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Registered User
Join Date: Oct 2011
Location: Matthews, NC
Posts: 129
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glasspack question
i installed an 8 inch glasspack and just tested it out, i like the sound but im curious about the popping, i only tested it in park and im really wanted some loud popping or cracking on decel, would it most likely do it when driving it just didnt in park? and do all glasspacks do it or is there a larger pipe diameter needed or something?
Just wondering. Thanks. |
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01-15-2012, 09:33 PM
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#2 |
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Registered User
Join Date: Jun 2011
Location: Wichita Falls, Tx
Posts: 69
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Re: glasspack question
My 72 is running glasspacks no popping what-so-ever. Mine are larger than 8 inches...not sure the exact measruements. From doing a quick yahoo search it seems thr popping is common, but is reduced with larger packs. Im not too familiar with glasspacks in general so I would be curious if the popping settles out after some use.
-Andy |
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01-16-2012, 02:33 AM
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#3 |
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Just here to tinker
 
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,697
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Re: glasspack question
Does the muffler dump underneath or do you have pipes out the back? I think the trick is to have tail pipes around 2 1/4" to get that classic popping sound.
__________________
78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold) |
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01-16-2012, 03:33 AM
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#4 |
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Registered User
Join Date: Dec 2011
Location: Arlington WA
Posts: 1,728
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Re: glasspack question
its going to sounds different when you are in gear, put in it second (so it wont shift up when you let of the gas) and get the rpms up then let off. then see if she pops
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GMC C15 355 SM465 3.73 80 C10 cruiser build thread 79 short stepside crew cab. big and ugly. build thread |
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01-16-2012, 03:40 AM
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#5 |
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Registered User
Join Date: May 2011
Location: Bradford, PA
Posts: 395
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Re: glasspack question
I noticed my glasspacks pop when I engine brake
__________________
1981
 K10 Scottsdale305 ci | TH350 | NP208 | 60k miles |
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01-16-2012, 08:37 AM
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#6 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: glasspack question
try downshifting coming to a stop!
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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