Fumes With no cats?

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May 23, 2008 | 03:31 PM

WS6.17

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From: N CA

Fumes With no cats?

HI, Im New here I wanted to know if any one knows, not running no cats would smell in the car?

May 23, 2008 | 03:35 PM

LT1-DAN

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From: FLORIDA

Yes, you will smell the fumes more, in the car and on your clothes.

May 23, 2008 | 03:38 PM

PewterMNZ

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+1 this happened instantly after i did headers and no cats.

May 23, 2008 | 03:42 PM

Nimitz87

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From: Cooper City, FL

a little smell...but in the car no not really, hell i run TD's no cats, dumped and window's down 100% of the time (no ac)

no passenger female/male has ever complained about it smelling.

Chad

May 23, 2008 | 03:54 PM

WS6.17

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From: N CA

Thanks

May 24, 2008 | 01:40 AM

EvilCamaroSS

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Yes, until you get it tuned. and it's really not that bad pre-tune

May 24, 2008 | 11:43 AM

DaveX

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From: Lexington, KY

Mine is noticable with the windows down sitting still. But I also have cam/heads. My AFR at idle is 14.63, though it might actually be a little richer due to cam inefficiency at idle.

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May 24, 2008 | 09:59 PM

lastcall190

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From: NJ

Quote:

Originally Posted by Nimitz87

a little smell...but in the car no not really, hell i run TD's no cats, dumped and window's down 100% of the time (no ac)

no passenger female/male has ever complained about it smelling.

Chad

I have never had someone tell me I smell like gas after driving the car. Or else they also don't have cats and can't smell **** either

-J

May 25, 2008 | 04:16 PM

#10

transAm-98

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If you put longtubes on especially with no cats you're most likely runnnig really rich if it hasn't been tuned, so you'll smell it a lot more until you get the tune cleaned up

May 25, 2008 | 07:05 PM

#11

VIPERBLUELX

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From: Ringgold, GA

Yes you'll get some smell, mine smells even after the tune, but I'm gonna try to get them to clear that up.

May 25, 2008 | 07:18 PM

#12

gametech

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From: Stockbridge GA

I think this is all relative to cam size and proper tuning. I'm sorry, but everyone didn't just go around reeking of exhaust fumes all day prior to 1974. With a small cam and good tuning, there should be no fuel smell. Toss in a big overlap cam, and the results could be lots of idle fuel smell.

May 25, 2008 | 07:23 PM

#13

BayAreaSS

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From: Bay Area, CA (Pittsburg)

It doesn't smell bad at all. I had lt's dumped duals and no cats and it wasn't bad at all. But now that i have a cam it stinks prettyy bad. But i love the smell. Its only strong at idle

May 26, 2008 | 12:05 AM

#14

Russ K

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From: Regina, Sask

My 2001 ZO6 with TPIS headers w/o cats had a bad exhaust smell mostly at idle. I had several cams that all needed 30-40* base idle timing. Now with the LG G5X3 114 LSA cam, I set the idle timing down to 16*, and the smell is almost gone. The bad exhaust oder is caused by nitrogen oxides (NOx) that are increased by a hotter combustion (over advanced spark timing)

This cam is the most driveable cam that has been installed so far! Prior cams were 234/228/.574/.572/113 LSA & 229/242/.631/.631/114 LSA. I also have LPE ported LS6 heads with 2.02/1.57 valves, milled to 62cc, and a Mamofied 90/90 intake.

Russ Kemp

May 26, 2008 | 12:23 AM

#15

corvetteandsilverado

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From: Lincoln, DE

^^^^ I also have the TSP LT's with the off road X pipe and at idle it smells bad but there are no fumes in the car

May 26, 2008 | 02:17 AM

#16

bmxer8699

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From: dfw

smells terrible if your at an idle and your heater or ac is on. if the windows are down you will smell it and you will smell like it at a stop.

May 26, 2008 | 05:39 AM

#17

orangeapeel

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From: Justin, TX

Quote:

Originally Posted by WS6.17

HI, Im New here

I can tell. Moving to External.

May 26, 2008 | 07:10 AM

#18

Redlinez

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I'm surprised OPEC hasn't found me yet.

May 26, 2008 | 10:37 AM

#19

02yellowls1

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From: indian head, maryland

i just installed my LT's and y pipe. and i can smell a little out side the car. but i have never smelled it in the car. or too the point where i was not able to stand it.