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07-25-2011, 01:13 PM
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#1 |
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12psi boost
Join Date: Feb 2007
Location: Georgia
Posts: 359
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Lax laws or not, doing the right thing would be replacing the cat, not just removing it. A good quality cat would still allow for good exhaust flow.
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07-25-2011, 05:28 PM
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#2 |
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3" Exhaust
Join Date: Feb 2010
Location: Chicago
Posts: 240
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Using a test pipe is a good idea. They were designed to prevent expensive catalyst damage during tuning and racing and are not intended to replace the cat permanently. They are technically only legal off road regardless of state emission testing. Once the car has been tuned well, you can install a good hi-flowing catalyst. You should notice little to no decrease in power and the cat should last awhile.
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07-25-2011, 07:46 PM
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#3 |
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Supra Forum Moderator
Join Date: Nov 2009
Location: Green-Ohio
Posts: 1,297
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hmm well I agree with all the above statements. I would recomend running a highflow cat If you decide to put a new one back on. Altho that is entirely up to you. I'm not going to be as presumptuous and tell you whats right and whats wrong. A high flow cat from magflow will give you the same gains as running one w/o. If money is tight and you choose to run the test pipe till you save up, you still have an option of just going straight 3'' all the way back. Either choice is yours. Hell, I ran mine with just the downpipe for about 3 days while my exhaust was being fabricated. Altho I wouldn't recommend it I'm not going to tell you it's wrong. The thing with just deleting the cat all togather is the fabrication will probably run you about the same as a high flow (maybe.) and yes running the test pipe as a permanent solution isn't really worse off then running cat delete. if you want to take the risk, but again these are just options of what is available to you.
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 92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines : |
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07-26-2011, 04:29 AM
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#4 |
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3" Exhaust
Join Date: Apr 2011
Location: columbus
Posts: 151
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well...thanks for the advice, and...we shall see on the cat lol
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07-31-2011, 06:33 PM
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#5 |
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12psi boost
Join Date: Oct 2009
Location: Crewe, England
Posts: 356
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Green, how did you cope when the exhaust went back on? Surely you missed that on boost sound & popping on the overrun? haha the bolts holding my system on behind the cat broke due to grounding over speed bumps all the time & it sounded awesome IMO
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'89 MA70 Supra GT aero 3.0turbo JDM, Rebuilt motor, K&N intake, 3" stainless turbo-back. New turbo and braided line kit... '89 Honda NC27 400, NC23 cams, open pipe, PC36a shock & possibly Showa USD forks... '83 Yamaha 29R XJ750E-II, number 69 off the line, only runner in the country? Original except Koni shocks '95 Honda PC26 CB500R, Winter hack, hateful, trying to sell it I'm not paranoid, they really ARE after me!!! 
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08-01-2011, 12:43 PM
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#6 |
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Supra Forum Moderator
Join Date: Nov 2009
Location: Green-Ohio
Posts: 1,297
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yea I agree, It sounded cool. But now its like a wisper and thats cool to. sort of.
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92 Ma71 7mGTE Auto. SafcII Supra FAQ Supra MKIII FAQ Classified Section guidelines : |
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