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Index > @ the Pickup Bed (General Topics) > Thread: I passed emissions!
Thread: I passed emissions!
Tom93R1


Redlining
Posts: 458
posted November 25, 2002 09:42 PM

I passed emissions!

Well I put a cat on my truck last week, adjusted my carb so the cat wouldnt give enough light to work under the hood at night, and went down to the testing facility today. I passed with HC readings of 101 and a CO of 1.54, the allowable limits were 400 and 4.2 respectively. Thankfully they didnt have an adaptor to test my gas cap because that thing isnt air tight at all! I am so happy, I can finally get my REPU legally registered in the city where I reside. This will be the first time in the year and a half I have owned it. I guess in AZ you can get any older vehicle to pass if you slap a cat and air pump on it. Now to take it off an put my header on so I can be a gross polluter again. :)
____________


'74 lawn-green
4-port 13b
Weber 48DCO
Racing Beat Header
Magnaflow
resonator/amplifier
really loud!

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wankel_dreams


Redlining
Posts: 293
posted November 26, 2002 12:45 PM

quote:
..... Thankfully they didnt have an adaptor to test my gas cap because that thing isnt air tight at all!...


be glad its not air tight. when i replaced all the fuel line in my truck i removed all the "extra" stuff (of course i still have it stored safely away). Now my fuel system is so airtight that i have to open the gas cap every so often to releive the vacuum or it will overcome the pumping ability of fuel pump. I just went on a long road trip a month ago, and with full tank, the vacuum is too great after about 20 miles!! Then i can make it to about 45, then 75.. I know i just need to put in breather. If i recall correctly i can put it on the fill tube without too much difficulty.

anyway..

CONGRATS on passing emmissions!!!!!!!!!!!!!!!
____________
74 wankel panther
77 REPU
79 rx7
89 Vert

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mazilla


1st Gear
Posts: 44
posted November 27, 2002 12:04 PM

WOW that's clean! nice to pass smog legally yah? I wish my last rotaries passed smog but luckily there were plenty of "nice guys" around to "make" it pass for me...I must commend you fro putting a cat on too! It makes an excellent noise reducer. Like both above, I would not seal off the tank either. It does cause the flow to stop...that tank in the bed that it evaporates to is a good thing. All my rx's did the same thing when I took the evap tank off line.
____________
ROTARY POWER!!! V8 is a great juice for consumption.

       
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Tom93R1


Redlining
Posts: 458
posted November 27, 2002 12:42 PM

I wonder how much backpressure a cat really creates? I know that I cannot feel the difference now from when I had no cat but my super cheap muffler is probably so restrictive that anything else added on wouldnt mater. When I finally get around to putting my header on and getting a free flowing muffler would it be worth the effort to have flanges welded onto a cat so that I can still run the cat and swap it for a mid-pipe on demand? Or should I just eliminate the cat entirely and just run the mid-pipe?

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mazilla


1st Gear
Posts: 44
posted December 03, 2002 12:53 PM

Tom: I seem to notice that a cat in general makes the system quieter, lower in tone, keeps what little low end a RE has but you really feel it in the top end when you want to wind the piss out of it. so probably mid to peak rpm will be kinda slow reving. Besides that, they get so hot on a rotary, you really feel it in the cab. my x4 with the heat exchanger was like that(HOT). I had it behind the header. Flames without the cat are nice too...

I'd flange it just so you can put it on any number of rotaries projects just to smog it. Then put the test pipe back on for free breathin.

Oh by the way, the cat does eliminate some of those tear jerkin fumes that seem to eminate from the back.
____________
ROTARY POWER!!! V8 is a great juice for consumption.

       
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