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Glasspacks

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Old Feb 25, 2014 | 07:29 AM
  #1  
patriots781's Avatar
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Car: firebird 91
Engine: 350 5.7 small block
Transmission: turbo transmission
Glasspacks

My exhaust is just two straight pipes so I grabbed 2 glasspacks 2 1/4 in n out I believe and just gonna throw those on I thought 2 1/4 was kinda small any thoughts?
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Old Feb 25, 2014 | 08:26 AM
  #2  
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
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Axle/Gears: 3.42 10 Bolt Posi
Re: Glasspacks

What size is your current exhaust?

For your 260HP engine that is probably not running right due to carb issues a single 2.5 would probably work.
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Old Feb 25, 2014 | 08:35 AM
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Car: firebird 91
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Re: Glasspacks

My carb iis fine now btw
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Old Feb 25, 2014 | 08:44 AM
  #4  
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Car: 1984 Trans Am L69
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Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Glasspacks

Originally Posted by patriots781
My carb iis fine now btw
Dual 2.25 is still more than enough for your engine.
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Old Feb 25, 2014 | 08:46 AM
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Car: firebird 91
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Re: Glasspacks

Thank you
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Old Feb 26, 2014 | 08:58 PM
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From: near STL in IL
Car: '85 camaro z/28
Engine: 305
Transmission: 700R4
Axle/Gears: stock
Re: Glasspacks

put two classic chambered powerstick mufflers on there instead it looks like a glasspack but sounds waaaaaay different, glasspacks sound like ****.
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Old Feb 28, 2014 | 01:01 PM
  #7  
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Car: firebird 91
Engine: 350 5.7 small block
Transmission: turbo transmission
Re: Glasspacks

There ok sound better then straight pipes ,but I want the exhaust to come out the back, so I was thinking of getting two pipes and a 4 chamber or 4outlet muffler and sticking it right underneath a lot of people do the glasspack with flowmaster it would sound great too I bet or just get two long pipes and have the exhaust come out back no flowmeter.but my mechanic.said there'd be clearance issues but if I jack up the back I don't think I will any ideas?
Attached Thumbnails Glasspacks-securedownload-47.jpg   Glasspacks-securedownload-52.jpg   Glasspacks-securedownload-51.jpg  
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Old Feb 28, 2014 | 01:04 PM
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midias's Avatar
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Glasspacks

Looks fairly decent. Careful if you have to deal with salt. Those rust out easy. I personally would paint them black so they blend in and make the tips pop.

I am sure it sounds better, never liked straight pipes on just about anything.

Personally I would save up, get a custom Y pipe made and use a factory replacement 3" catback.
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Old Feb 28, 2014 | 01:21 PM
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Car: firebird 91
Engine: 350 5.7 small block
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Re: Glasspacks

Midias I want it black too,what kind of paint would I use? I had bigger tips picked out too
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Old Feb 28, 2014 | 01:25 PM
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midias's Avatar
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Glasspacks

Originally Posted by patriots781
Midias I want it black too,what kind of paint would I use? I had bigger tips picked out too
Go to your local store and get high temp paint for engines or headers. They are fairly far back so anything over 500F should work. Clean the surface properly and scuff it up with some sand paper.

Edit:

Also take the stickers off them before paint.
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Old Feb 28, 2014 | 02:12 PM
  #11  
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Car: 1992 Camaro RS
Engine: Rebuilt 350 going in after paint
Transmission: WCT5, 7k & counting behind the 350
Axle/Gears: 4thgen disc rear w/ 3.73 Posi
Re: Glasspacks

I have a 2.25" true dual exhaust on my camaro with a pair of glasspacks mounted sideways under the rear bumper.vthe tips come out the back in the same position as the stock cross flow muffler. Sounds great, and I have no problems jacking up the rear from the differential. You can't see the glasspacks just standing behind the car.
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Old Feb 28, 2014 | 02:48 PM
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Car: 1983 Z28
Engine: 385 Fastburn
Transmission: T-5
Axle/Gears: BorgWarner 9-bolt posi, 3.27 gears
Re: Glasspacks

Originally Posted by patriots781
There ok sound better then straight pipes ,but I want the exhaust to come out the back, so I was thinking of getting two pipes and a 4 chamber or 4outlet muffler and sticking it right underneath a lot of people do the glasspack with flowmaster it would sound great too I bet or just get two long pipes and have the exhaust come out back no flowmeter.but my mechanic.said there'd be clearance issues but if I jack up the back I don't think I will any ideas?
Not related to the exhaust, but is your breather a triangular edelbrock proflo or similar? (looks like a fly's head, metal mesh with foam filter). I ask because it looks like one in the first pic

If so I'd recommend swapping it out for a different breather altogether. Those do a couple of things that are bad:

1. they can act like a wick and soak up fuel (so one backfire through the carb and you become a candle)

2. if and when you backfire through the carb and scorch the underside of the foam it gets charred and gets sucked into the engine

Both are bad, and both are avoidable if you get a different air cleaner, even one with just a paper filter.
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