new cat + Vband clamps + resonator = $300
10-09-2008, 05:30 PM
#24
2 Props,3 Dildos,& 1 Cat
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Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,338
Total Cats: 573
i'm just sayin, if you're going to go cat or no cat, you might as well go all the way when you go no-cat. why settle for 95%?
Jason: how much OD do you have space for? the dynomax is 4in OD.
http://store.summitracing.com/partde...5&autoview=sku
Jason: how much OD do you have space for? the dynomax is 4in OD.
http://store.summitracing.com/partde...5&autoview=sku
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10-09-2008, 05:41 PM
#25
I'm running a pair of 24" core 3" ID, 4.5" OD glasspacks and a 27" core glasspack. I KNOW there's room under there. 
Loured and skinny will be quieter than the same length thick perforated glasspack. But perforated flows a little bit better. But it's negligable if you're running 3" anyways. When I was building my exhaust I tested it with the lourves pointing with flow or against it. Against it was notably quieter. I put them with the lourves against the flow.
Loured and skinny will be quieter than the same length thick perforated glasspack. But perforated flows a little bit better. But it's negligable if you're running 3" anyways. When I was building my exhaust I tested it with the lourves pointing with flow or against it. Against it was notably quieter. I put them with the lourves against the flow.
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10-09-2008, 07:21 PM
#26
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,338
Total Cats: 573
he's running 2.5" so it might make more difference. plus he says its for track days. I think that warrants the 2% performance improvement over the 2% quietness improvement
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10-09-2008, 08:15 PM
#28
My understanding is they aren't designed to last forever. It's a compromise. More flow and you can pass emissions but they won't last as long as an OEM catalytic converter. (I hate saying cat) Sucks, but that's how it is. I plugged the stocker with the nitrous. No cat now. No problems.
No cat now. No problems.
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10-29-2008, 06:11 PM
#29
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Join Date: Jul 2005
Posts: 6,420
Total Cats: 84
OK I now have a louvered core 2.5" glasspack in place of the cat. Louver openings facing rear. It has a band clamp behind it so it's removable, and I can put the cat back in. The metal cat's core isn't clogged nor burned, but it's bouncing around in the shell.
I also upgraded the dented and leaking Dynomax middle resonator to a longer one by Magnaflow.
The car is quieter than ever. At cruise, top down, there isn't much exhaust thrum at all.
Exhaust backpressure is now 40-45% lower than original.
I also upgraded the dented and leaking Dynomax middle resonator to a longer one by Magnaflow.
The car is quieter than ever. At cruise, top down, there isn't much exhaust thrum at all.
Exhaust backpressure is now 40-45% lower than original.
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