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Old 06-29-2001, 01:47 PM   #1
OsakaGangsta
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2000 Impreza 2.5 RS
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Default Random Technology's high flow cat

Anyone using this http://www.randomtechnology.com/new_products_imp.html ?

What are the main benefits of a "high-flow cat" and what does it offer that a good cat-back doesn't? Also, I was planning on getting a Stromung with the 2.25" midpipe...will this cat work with it? It says the inlet and outlet of the cat is 2.5" but I emailed Random and he said it would be compatible with 2.25" piping.

I was just hoping that someone here had some dyno data or a personal experience with this...
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Old 06-29-2001, 03:32 PM   #2
jacktam1
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do you know how much for that?
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Old 06-29-2001, 03:44 PM   #3
OsakaGangsta
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jacktam, I dunno yet. I'm waiting for them to respond to another email.
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Old 06-29-2001, 03:50 PM   #4
OsakaGangsta
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Quote:
Dan,

The RAN #822504 would run $293.61. Normal delivery time is 10 working days.
Handling and Ground UPS would run $9.95
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Old 06-29-2001, 04:26 PM   #5
jacktam1
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Thanks for info man..
it's kinda pricey, I'd rather get the header first.
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Old 06-29-2001, 05:03 PM   #6
Stavros g
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wouldn't the 2.5" inlet and outlet reduce back pressure too much?

Having the same effects as a 2.5" exhaust does now on torque?

Stav
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Old 06-29-2001, 05:26 PM   #7
jeffg
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Do you guys not what a catalytic converter is? On the 2.5RS we have 2 of them. They have an internal pipe diameter of about 1.75" and are very restrictive. The random piece you are looking at is a replacement for both of the cats, with 1 cat that is designed to flow high amounts of exhaust. You would still need a cat-back exhuast system to go with this, as well as headers or a turbo system. They will not decrease back pressure to level that will hurt performance, if they gain performance on a NA engine, that is still up in the air.

Jeff
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Old 06-29-2001, 06:02 PM   #8
SuBart
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So in other words if you took out the cats by replacing them with a 2.25" straight pipe you would see even more power gains? right?.....
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Old 06-30-2001, 10:53 AM   #9
d00f
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At the top end, most likely. At the bottom end, you'd probably lose torque. You'd need to replace or rework the ECU since it'll go into limp mode as soon as it realises that the cats aren't working. You could probably wire something up on the O2 sensors to fool it.
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