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which one should i get?

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Old Oct 21, 2007 | 12:36 PM
  #1  
t/agta's Avatar
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From: pittsburgh, pa
Car: 87' Trans Am GTA, 88' Trans Am GTA
Engine: 350 TPI
Transmission: 700R4
which one should i get?

can i get some sizing recomendations? I want to put a cherry bomb extreme with dual outlet on my gta. I was gonna put it somewhere before the axle and build my own tailpipes. The sizes they have are in this link.

http://www.jegs.com/webapp/wcs/store...y+bomb+extreme
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Old Oct 21, 2007 | 11:45 PM
  #2  
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From: pittsburgh, pa
Car: 87' Trans Am GTA, 88' Trans Am GTA
Engine: 350 TPI
Transmission: 700R4
Re: which one should i get?

....
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Old Oct 22, 2007 | 03:28 PM
  #3  
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From: Manchester, CT + Nashua, NH
Car: 90 Firebird Formula
Engine: LO3
Transmission: T5
Axle/Gears: 3.08 one wheel peel
Re: which one should i get?

Just do the 7427. Its 3" inlet, dual 2.5" outlet. But you are gonna have a job and a half fitting it before the axle, and running the pipes.

On another note, I bought the IMCO pro series (2-chamber) mufflers which are the same exact as the cherry bomb pro's but a different box. But they were awesome on my v6, would have sounded better on a v8. They were great quality for the price, better than flowmaster. And they hadnt rusted after two salty winters (aluminized).

Oh, I bought from this site. Worked good for me.

http://www.completeexhaust.com/produ...oducts_id=2420
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Old Oct 22, 2007 | 03:35 PM
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
I'd say 7428, put it in the stock location, and use a single 3" tailpipe.
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Old Oct 22, 2007 | 10:34 PM
  #5  
t/agta's Avatar
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From: pittsburgh, pa
Car: 87' Trans Am GTA, 88' Trans Am GTA
Engine: 350 TPI
Transmission: 700R4
Re: which one should i get?

I'd say 7428, put it in the stock location, and use a single 3" tailpipe.




Its not a cross flow muffler. And i want dual tips.
Would anybody happen to have pics of how they have their exhaust set up to share with me? :-)
thanks
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Old Oct 23, 2007 | 12:13 AM
  #6  
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From: Manchester, CT + Nashua, NH
Car: 90 Firebird Formula
Engine: LO3
Transmission: T5
Axle/Gears: 3.08 one wheel peel
Re: which one should i get?

I dont think they make a crossflow extreme. I thought you wanted to place the muffler somewhere before the axle and run two pipes out like a mustang.

If you want a cherry bomb crossflow application, get the 7467 or the 7468. They are pro series crossflow mufflers, which will sound similar to a flowmaster 80. The 7468 is 3" inlet, while the 7467 is 2.5" inlet. So if you currently have stock exhaust you would need the 7467 probably.

For tips summit sells these:

http://store.summitracing.com/partde...5&autoview=sku

http://store.summitracing.com/partde...5&autoview=sku

or, just get a shop to weld you up some 90* bends to some truck tips from completeexhaust.com like these:

http://www.completeexhaust.com/produ...oducts_id=1082

or

http://www.completeexhaust.com/produ...oducts_id=2107
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Old Oct 23, 2007 | 09:55 AM
  #7  
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Originally Posted by t/agta
Its not a cross flow muffler. And i want dual tips.
You do understand that a crossflow is more restrictive than a 3" with single 3" out.
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Old Oct 23, 2007 | 02:44 PM
  #8  
t/agta's Avatar
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From: pittsburgh, pa
Car: 87' Trans Am GTA, 88' Trans Am GTA
Engine: 350 TPI
Transmission: 700R4
Re: which one should i get?

i worded that poorly. sorry. It is straight piped right and piping stops after the axle right now. I meant that i want to put it b4 the axle, not in a cross flow position, and i was gonna see if i could build tail pipes that would bring it out the back as duals. I know that it wont flow very evenly because the right side would have maybe one bend in it and the left would have probably 3 or 4 to get it to come out in the right spots in the back, but i think i can deal with it. I plan on setting it up far from how it is stock.
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Old Oct 23, 2007 | 03:54 PM
  #9  
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From: Manchester, CT + Nashua, NH
Car: 90 Firebird Formula
Engine: LO3
Transmission: T5
Axle/Gears: 3.08 one wheel peel
Re: which one should i get?

If you are going to go through all the work to run 2 pipes over the axle, why not just get some longtubes on the cheep and run true dual 2.5" exhaust? Then you could use 2 extreme mufflers and it would sound nasty!
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Old Oct 25, 2007 | 08:50 PM
  #10  
t/agta's Avatar
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From: pittsburgh, pa
Car: 87' Trans Am GTA, 88' Trans Am GTA
Engine: 350 TPI
Transmission: 700R4
Re: which one should i get?

headers will happen eventually but i dont have that kinda money right now. One of my teachers at my tech school thinks i should get single inlet/outlet, put it before the axle, lengthen the part of the pipe where it curves right b4 it would have gone into the stock muffler to the center, then put a y-pipe there and route custom tailpipes from there for duals. I'll be making quite a bit of backpressure if i do that, but it still wouldnt be quite as bad as the stock system, and its only a temporary setup anyways.
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