I've got a 3 1/2 " down pipe to a 3" Random Tech High flow cat
with Greddy sp exhaust on my 94 tt bpu'd ++ 6 speed
Car recently tuned up

County initiated emmisions testing
Boughtthis cat claiming it would pass emisions
I have orig exhaust and someone good with a cutter and wielder
Will OEM main cat replacing Random Tech cat
pass emissions
Nox numbers extremely high and HC numbers elevated
Mechanic blames cat not burning enough

WTF

yeh its prolly your cat, did u just buy it? i wouldnt trust those mechanic, dirty these days. i would get the oem cat, should pass emissions.

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1998 Toyota Supra
T88
654 rwhp

I have a 93.5 BPU+ Auto with the same exhaust, DP, and cat (Random Tech) and I passed. Only after I put fresh NGK 6097's (.032 gap) and made sure I had no octane booster or Toluene in the gas. If passing gets expensive, just get an HKS AFR and lean that baby down 10% prior to testing, test, then put it back.



___________
-Goldfinger

93 Supra Twin Turbo BPU+
76 Porsche 911 RS <-for sale

just slip the guy some extra cash, you'll pass with flying colors, thats what i do

If you still have the stock cats why not just put them on for the day?

Get rid of that random tech too, its just robbing your HP.

quote:

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Originally posted by LadyDeATh:
just slip the guy some extra cash, you'll pass with flying colors, thats what i do

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Yeah, right......

TTurbo

You should drive the supra on the highway for 20-30min or so....to make sure your cat is running at optimum temps. This makes a huge difference with all of the emmissions checks!!

testing a cold system is always gonna show bad results....