Just dynoed car...smells like rotten eggs....why?

ScortLX

Founding Member

Mar 20, 2001

261

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16

Parker, Colorado

Oct 24, 2004

#1

• Oct 24, 2004

• #1

Hey everybody, just dynoed the car yesterday and it put down 246 hp and 283 lb/ft SAE. I was happy with that but the car stunk pretty bad. Rotten eggs! I installed a Magnaflow x-pipe with cats so I thought it wouldn't stink like this. Could my manifold bolts not be tightened down correctly? Or is it just the two cats instead of four? I've heard passing emissions here in Colorado is easy with a catted pipe, but with this smell..it would never pass the "sniffer" test. Can anyone help me? Thanks!

Nate

 

BossShinoda9701

New Member

Oct 16, 2004

52

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0

Colorado

Oct 24, 2004

#2

• Oct 24, 2004

• #2

Bad gas maybe :dunno:

Or does it always smell.

Yea passing emissions here is easy...just as long as you have cats. I tried with my o/r x and it passed all tests except the visual so i had to go get cats put on it.

I dont know extactly what could cause the smell but just as long as the cintrogens (sp) are low, they will pass the car. And of course they increased the rates of tests now

 

2001Saleen181

New Member

Mar 20, 2004

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0

Oct 24, 2004

#3

• Oct 24, 2004

• #3

I suspect bad cats. A Muffler shop could probably confirm this.

 

M

Matto

New Member

Apr 21, 2003

287

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Arkansas

Oct 24, 2004

#4

• Oct 24, 2004

• #4

Damn, thats a pretty good dyno man.

 

Roxstang

New Member

Apr 3, 2004

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Pa

Oct 24, 2004

#5

• Oct 24, 2004

• #5

Could be gas, but I think it's the cats burning off a little,(new cats do that) don't worry about it. The reason you noticed it, is for the first time you and your car are sitting still while it's at WOT and you can smell the exhaust.

 

ScortLX

Founding Member

Mar 20, 2001

261

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16

Parker, Colorado

Oct 24, 2004

#6

• Oct 24, 2004

• #6

Thanks about the dyno numbers...I was satisfied. If its bad cats...I'm gonna be pissed. The pipe is only three months old! I also thought it may be the cats burning off too....but I've driven almost six hundred miles since I put the pipe on. Hmmm...damn. Anybody else have any ideas? Thanks!

 

B

bdcardinal

tree hugger

Jun 10, 2003

3,612

16

69

santa barbara, CA

Oct 24, 2004

#7

• Oct 24, 2004

• #7

its the cats. my buddies cobra with bassani cats smelled like rotton eggs/sulfer for the first month or so. probably running C16 through it didnt help any.

 

myponyrocks

I have more billet on the Stang than most women ha

Apr 18, 2004

1,219

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37

Oct 24, 2004

#8

• Oct 24, 2004

• #8

did you go to the DYNO with us? (coloradostangs)

Eggs is cats, they may be bad or maybe they need break in?

 

bierbelly

Dirty Old Men Need Love Too

Founding Member

Oct 17, 2001

1,598

4

58

Sterling, VA

Oct 24, 2004

#9

• Oct 24, 2004

• #9

Rotten eggs is cheap gasoline. High sulfur in the gas causes formation of H2S (hydrogen sulfide) within the cats. It's not the cats, it's what you're putting into them. Buy good gas, cheapazz.

 

ScortLX

Founding Member

Mar 20, 2001

261

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16

Parker, Colorado

Oct 25, 2004

#10

• Oct 25, 2004

• #10

Hey mypony.....yeah I did go with you. I told you I was going to be the lowest numbers there! I was running Shell 91 octane, so I thought that would be good enough gas. I'm going to cross my fingers that its not the cats. BTW...congrats on the great numbers mypony! We have mods that I would think would make us pretty even, but I saw that you have underdrives and your a/f ratio was a little leaner across the board. I sure wish I broke the 250/280 mark (you need to change the 1 to a 2 in your sig BTW). I'll try some different gas and see what happens!

 

tygr1

New Member

Jun 16, 2004

318

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0

SoCal

Oct 25, 2004

#11

• Oct 25, 2004

• #11

Shell gas additives STINK! Literally. Combine with newish cats and the smell would prevent u from committing suicide in the garage...you wouldn't be able to stay in there with it! LOL

 

myponyrocks

I have more billet on the Stang than most women ha

Apr 18, 2004

1,219

0

37

Oct 25, 2004

#12

• Oct 25, 2004

• #12

your car isnt tuned right? I ran midgrade like I always do on the Dyno... at least we both outperfomred Ricks Roush stage 2, I know hes selling the thing for sure now

Next time we go I hope to be up another 20 ponies and into the 320s for TQ, and why change the 1 to a 2? I know the whole round up thing, but I'm a stickler for numbers

 

ScortLX

Founding Member

Mar 20, 2001

261

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16

Parker, Colorado

Oct 25, 2004

#13

• Oct 25, 2004

• #13

The only reason I said that you need to change the 1 to a 2 is because in your sig you list your hp number as 151.5 and it needs to be 251.5! BTW...What did Rick's car put down? I can't believe that it was lower than mine. I think I used 87 octane the first time I dynoed at dynopro...so maybe I'll use 87 if we dyno in the spring or something! It was nice to meet you btw...

 

myponyrocks

I have more billet on the Stang than most women ha

Apr 18, 2004

1,219

0

37

Oct 26, 2004

#14

• Oct 26, 2004

• #14

lmao

damn fingers

 

myponyrocks

I have more billet on the Stang than most women ha

Apr 18, 2004

1,219

0

37

Oct 26, 2004

#15

• Oct 26, 2004

• #15

thats like one of those damn tests that you have to read it and say whats wrong and you dont see anything, then you read it backwards and find all sorts of stuff wrong with it.