Raw fuel smell after cat delete - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

dwheeler78 · 01-14-2016, 02:28 PM

I just installed JBA cat delete mid pipes on my 2011 L99. The power is great. But the raw fuel smell and AFM "fart" are less than desirable. When I get my SCT tuner that I will order in a few weeks will that help with both of those issues?

20152SS1Le · 01-14-2016, 02:35 PM

you will get a stronger smell without cats but excessive smell is probably because you still have the o2's on. They need to be tuned out.

dwheeler78 · 01-14-2016, 02:36 PM

I hoped to hear that. The SCT tuner will be done by dynosteve and I assumed the smell would not be as strong. Thanks.

20152SS1Le · 01-14-2016, 02:43 PM

np

Apex Motorsports · 01-14-2016, 05:10 PM

Quote:

Originally Posted by dwheeler78

I just installed JBA cat delete mid pipes on my 2011 L99. The power is great. But the raw fuel smell and AFM "fart" are less than desirable. When I get my SCT tuner that I will order in a few weeks will that help with both of those issues?

That is part of the ball game when it comes to running without cats. Tuning out AFM will fix the "fart" though.

pyroguy · 01-14-2016, 05:38 PM

The smell won't completely go away with a tune because that is the purpose of cats, to burn unburned fuel. No cats = unburned fuel making it through.

Don't completely turn off your O2's though. The rear ones yes, the front ones need to be tuned properly though.

stock block · 01-14-2016, 07:06 PM

Quote:

Originally Posted by pyroguy

The smell won't completely go away with a tune because that is the purpose of cats, to burn unburned fuel. No cats = unburned fuel making it through.

Don't completely turn off your O2's though. The rear ones yes, the front ones need to be tuned properly though.

^what he said

sycraft · 01-14-2016, 07:14 PM

or so a E85 conversion, that smell is pretty good

Chris1SS1LE · 01-14-2016, 08:15 PM

A friend had a z06 we learned this with, now on 1 set of hi flow cats always and the future

762ch · 01-14-2016, 10:26 PM

E85 with no cats smells great! Really really good actually. Run some of the fuel scents until you get tuned. Heck even after its tuned, the smell is drastically cut down. I run the cotton candy or the bubble gum version. http://m.summitracing.com/search/pro...uel-fragrances

Mean Green Z28 · 01-14-2016, 10:36 PM

After my long tube install with off road pipes, the smell really was bad ... had to get the high flow cats and now it's much better. Now the only issue is the first Rev the car does during cold starts, it's stupid loud. I've kinda got used to half starting it the first time (let go of clutch before engine reallt starts), then crank it again ... the second time, it doesn't Rev to the moon

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Camaro Dude · 01-17-2016, 01:59 PM

Quote:

Originally Posted by 762ch

E85 with no cats smells great! Really really good actually. Run some of the fuel scents until you get tuned. Heck even after its tuned, the smell is drastically cut down. I run the cotton candy or the bubble gum version. http://m.summitracing.com/search/pro...uel-fragrances

WTF!! Nice find!

I never knew that these fuel/exhaust fragrances existed!

Does this really work? Lol

I mean, if someone is following you, and you are @WOT, will they be like, "hmmm, that smells lovely

?"

Texas_RS · 01-17-2016, 02:09 PM

Quote:

Originally Posted by 762ch

E85 with no cats smells great! Really really good actually. Run some of the fuel scents until you get tuned. Heck even after its tuned, the smell is drastically cut down. I run the cotton candy or the bubble gum version. http://m.summitracing.com/search/pro...uel-fragrances

Seriously? I've never heard of this stuff. Does it really make your car smell like that? Didn't know you could add a hint of fragrance to racecar!

havelegs · 01-17-2016, 02:15 PM

Quote:

Originally Posted by 762ch

E85 with no cats smells great! Really really good actually. Run some of the fuel scents until you get tuned. Heck even after its tuned, the smell is drastically cut down. I run the cotton candy or the bubble gum version. http://m.summitracing.com/search/pro...uel-fragrances

lol

01-14-2016, 02:28 PM	#1
dwheeler78 Drives: 2011 Camaro SS/RS Join Date: Dec 2015 Location: Tallahassee Posts: 7 View My Garage	Raw fuel smell after cat delete I just installed JBA cat delete mid pipes on my 2011 L99. The power is great. But the raw fuel smell and AFM "fart" are less than desirable. When I get my SCT tuner that I will order in a few weeks will that help with both of those issues?

01-14-2016, 02:35 PM	#2
20152SS1Le Drives: 2015 Camaro SS 1LE Join Date: Aug 2015 Location: NY Posts: 294	you will get a stronger smell without cats but excessive smell is probably because you still have the o2's on. They need to be tuned out. __________________ 2015 1LE Red Rock- Recaros, NAV, and NPP BMR 1" lowering springs and Bilstein B6 monotube shocks/struts Rotofab CAI Elite engineering catch can Texas Speed 1 7/8 long tube headers and Cats GPI Rod mod and ported intake Ported throttle body JRE tune

01-14-2016, 02:43 PM	#4
20152SS1Le Drives: 2015 Camaro SS 1LE Join Date: Aug 2015 Location: NY Posts: 294	np __________________ 2015 1LE Red Rock- Recaros, NAV, and NPP BMR 1" lowering springs and Bilstein B6 monotube shocks/struts Rotofab CAI Elite engineering catch can Texas Speed 1 7/8 long tube headers and Cats GPI Rod mod and ported intake Ported throttle body JRE tune

01-14-2016, 05:38 PM	#6
pyroguy Started#gottalovethatblue Drives: ABM #831 Join Date: Apr 2013 Location: TN Posts: 6,933 View My Garage	The smell won't completely go away with a tune because that is the purpose of cats, to burn unburned fuel. No cats = unburned fuel making it through. Don't completely turn off your O2's though. The rear ones yes, the front ones need to be tuned properly though. __________________ '10 Camaro 2SS/RS \| Aqua Blue #831 of 3,903 \| Silver Stripes Check out my build thread

01-14-2016, 07:14 PM	#8
sycraft COTW 5/06/2013 Drives: 2017 Corvette Grand Sport-Ho-Vette Join Date: May 2012 Location: Milford, Michigan Posts: 3,201 View My Garage	or so a E85 conversion, that smell is pretty good __________________ 2017 Grand Sport, Borla X Pipe.....Enough Said

01-14-2016, 02:36 PM	#3
dwheeler78 Drives: 2011 Camaro SS/RS Join Date: Dec 2015 Location: Tallahassee Posts: 7 View My Garage	I hoped to hear that. The SCT tuner will be done by dynosteve and I assumed the smell would not be as strong. Thanks.

01-14-2016, 08:15 PM	#9
Chris1SS1LE Drives: 2014 Camaro Red Hot 1LE NPP Recaro Join Date: Jun 2014 Location: Indiana Posts: 639	A friend had a z06 we learned this with, now on 1 set of hi flow cats always and the future

01-14-2016, 10:26 PM	#10
762ch Drives: 2011 2SS Join Date: Aug 2014 Location: Sacramento Posts: 341	E85 with no cats smells great! Really really good actually. Run some of the fuel scents until you get tuned. Heck even after its tuned, the smell is drastically cut down. I run the cotton candy or the bubble gum version. http://m.summitracing.com/search/pro...uel-fragrances

01-14-2016, 10:36 PM	#11
Mean Green Z28 Drives: 2010 2SS Join Date: Aug 2013 Location: Annapolis, MD Posts: 941 View My Garage	After my long tube install with off road pipes, the smell really was bad ... had to get the high flow cats and now it's much better. Now the only issue is the first Rev the car does during cold starts, it's stupid loud. I've kinda got used to half starting it the first time (let go of clutch before engine reallt starts), then crank it again ... the second time, it doesn't Rev to the moon Sent from my SAMSUNG-SM-G900A using Tapatalk __________________ 2010 2SS - CAI Intake, ADM Scoop, RotoFab Washer relo. LT Headers and off-road pipes, X-pipe, Muffler Deletes, ZL1 Spoiler, Technostalgia Tail-lights '98 T/A (Sold) - Forged 6.0ltr, MS3, P&P'd Heads/Valves, 90MM FAST/TB, Headers, 3" Y-pipe, 4" Mufflex Catback. Koni Adjustables w/GC coilovers (550/175), Strano Sway Bars '94 Z28 (Sold) ... LS1 swap (basically same setup as the T/A), TH350/3500 stall ... swapped it all into the T/A -- >> Some of my Projects My Fquick Page