best flowing glasspack??
#1
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Car: '89 IROC-Z
Engine: 355
Transmission: 700r4 edge 3000 stall
Axle/Gears: 9-bolt 3.73
best flowing glasspack??
I've searched and havent found a CLEAR answer yet, which glasspacks flow the best? Cherry bombs, purple hornies, thrush, ill even throw in bullets (even though not a true glasspack) I'm thinking of going with true dual 2.5" and glasspacks dumped before the rear. Cherry bombs are only 20 bucks and they are a classic muffler. But if something flows better and isn't that much more id go with them. Also what about using a 3" glasspack in a 2.5" system?
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Car: 1984 Camaro 'Vert
Engine: 350
Transmission: 700R4
Re: best flowing glasspack??
I'm not sure there is much of a straight answer to this one. Unlike a conventional muffler, a glass pack is basically a tube with fiberglass wrapped around it. The exhaust gas really isn't restricted or re-directed as with the mufflers that are standard on our car. I've always thought that glass packs were simply equivalent to straight piping from a flow standpoint. Dropping a 3" glasspack in a 2.5" exhaust would probably be the same as dropping a section of 3" pipe in there.
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Car: 04 Jetta
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Re: best flowing glasspack??
when i put a cherry bomb on my car it was where the cat was suspose to be and without it it sounded really loud and with it it was quieter but still obnoxiously loud
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
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The problem with the typical Cherry Bomb and other glass packs is the perforated tube is smaller than the inlet, which leads to restriction. Using a 3" muffler in a 2.5" system would help alleviate that.
Bullets have the same size internal tube as inlet/outlet.
Bullets have the same size internal tube as inlet/outlet.
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Car: 1983 Pontiac Firebird
Engine: LG4 305ci 4bbl
Transmission: 700r4
Axle/Gears: 10-bolt open diff.
Re: best flowing glasspack??
if you want a real glasspack, go with a thrush. i have one and no complaints. just be aware that true dual side exits are hard to do and it will cost you ground clearance. good luck!
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Re: best flowing glasspack??
----------
Save yourself the trouble if this is the case and spend good money on the proper pipes.
Last edited by Guro 305; 05-24-2008 at 12:25 AM. Reason: Automerged Doublepost
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#8
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Car: '89 IROC-Z
Engine: 355
Transmission: 700r4 edge 3000 stall
Axle/Gears: 9-bolt 3.73
Re: best flowing glasspack??
im not going to do side exits, im going to dump em right before the rear end. I think im going to go with thrush.
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Car: 1984 Camaro Berlinetta
Engine: 355
Transmission: Th-350
Axle/Gears: 3.23
Re: best flowing glasspack??
Get 2.5" thrush, they are straight through perforated core and the internal tube diameter is 2.5" all the way through.
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Re: best flowing glasspack??
I'm researching myself and came across a couple of web sites.
http://autospeed.com/cms/article.html?&A=0383&P=1
http://www.broaderperformance.com/mu...flow_tests.htm
http://www.ls1tech.com/forums/showthread.php?t=113572
You may find some useful information there.
2.2 cfm/hp means zero horsepower loss from backpressure. The tuning issue is something else.
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