To those with muffler deletes: - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

jshadeck · 07-20-2013, 04:51 PM

Does anyone else get the entire back bumper covered in black exhaust soot? Factory exhaust other than a dual exit muffler delete (tips poke out further than stock and angle up)

Anyone have a clue what i can do to reduce or eliminate this soot from collecting on the car? It doesnt come off in any car wash (auto or manual touchless) and only now thanks to a recommendation from my detailer can i truly get it clean during a hand wash...

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Views: 1353
Size: 91.6 KB

djliquidsteele · 07-20-2013, 06:32 PM

No black soot here and I've also deleted the secondary cat. My guess is you're running rich.

Miniata · 07-20-2013, 06:35 PM

single Nameless delete here, no abnormal soot that I've noticed, but my BRZ is dark gray metallic, so it would have to be pretty bad to notice. My Nameless track pipe does stick out quite a bit farther than stock.

StormTrooper · 07-20-2013, 06:44 PM

If you have the cats still I'd say you're running rich...

supramkivtt2jz · 07-20-2013, 06:50 PM

No soot for me either. Youre too rich

jshadeck · 07-20-2013, 07:07 PM

Bone stock car other than the muffler delete, how would it be running rich?

RIPTRD71 · 07-20-2013, 07:14 PM

Dual exit muffler delete and Invida catless front pipe...no soot here.

Walla Walla · 07-20-2013, 07:15 PM

berk dual delete, no soot, and white brz

hellyvin · 07-21-2013, 09:19 PM

berk dual delete, no soot, and wrb brz

tech4pdx · 07-21-2013, 09:33 PM

Crawford.. Overpipe back exhaust, secondary cat retained.. No soot.

jshadeck · 07-21-2013, 10:03 PM

Im thinking it must have to do with the angle of the tips and maybe even the fact they are such a large diameter. Only accumulates on the highway drives. Most exhausts collect soot inside the tips, mine are barely black inside, but it gets on the bumper. Oh well. Thanks for the input..

zc06_kisstherain · 07-22-2013, 11:48 AM

Motiv Catless Front pipe and Berk single exist muffler delete w/ tip, no soot here. it's just damm loud. lol

Smoke Destructer · 07-24-2013, 06:46 PM

I've got a Borla axleback setup the dealership had put on my car, and I've noticed a lot of black junk on the back of my car too. For a while I figured it was just usual road grit or something, but now I'm not so sure. A couple people said you might be running rich, but if that was the case is there any way to confirm?

EN2_Squirrel · 07-25-2013, 02:11 AM

made my own, no soot.are you getting alot of backfiring?

07-20-2013, 04:51 PM	#1
jshadeck Senior Member Join Date: Nov 2012 Drives: 2013 Scion FR-S Whiteout 6MT Location: carlisle, pa Posts: 773 Thanks: 3 Thanked 221 Times in 163 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	To those with muffler deletes: Does anyone else get the entire back bumper covered in black exhaust soot? Factory exhaust other than a dual exit muffler delete (tips poke out further than stock and angle up) Anyone have a clue what i can do to reduce or eliminate this soot from collecting on the car? It doesnt come off in any car wash (auto or manual touchless) and only now thanks to a recommendation from my detailer can i truly get it clean during a hand wash... __________________

07-20-2013, 06:35 PM	#3
Miniata Senior Member Join Date: Mar 2012 Drives: 13 BRZ - 90 Miata - 07 FXT -05 Mini Location: Ohio Posts: 546 Thanks: 6 Thanked 142 Times in 105 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	single Nameless delete here, no abnormal soot that I've noticed, but my BRZ is dark gray metallic, so it would have to be pretty bad to notice. My Nameless track pipe does stick out quite a bit farther than stock. __________________ 17x7 Kosei K1-TS w/ 215/45-17 Dunlop Star Specs Nameless Track Pipe - Strano front sway bar

07-20-2013, 07:07 PM	#6
jshadeck Senior Member Join Date: Nov 2012 Drives: 2013 Scion FR-S Whiteout 6MT Location: carlisle, pa Posts: 773 Thanks: 3 Thanked 221 Times in 163 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Bone stock car other than the muffler delete, how would it be running rich? __________________

07-21-2013, 10:03 PM	#11
jshadeck Senior Member Join Date: Nov 2012 Drives: 2013 Scion FR-S Whiteout 6MT Location: carlisle, pa Posts: 773 Thanks: 3 Thanked 221 Times in 163 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Im thinking it must have to do with the angle of the tips and maybe even the fact they are such a large diameter. Only accumulates on the highway drives. Most exhausts collect soot inside the tips, mine are barely black inside, but it gets on the bumper. Oh well. Thanks for the input.. __________________

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07-20-2013, 06:32 PM	#2
djliquidsteele Senior Member Join Date: Apr 2012 Drives: Scion FR-S Location: Louisville, KY Posts: 498 Thanks: 62 Thanked 130 Times in 92 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	No black soot here and I've also deleted the secondary cat. My guess is you're running rich.

07-21-2013, 09:19 PM	#9
hellyvin Member Join Date: Nov 2012 Drives: WRB Brz Location: CA Posts: 84 Thanks: 10 Thanked 32 Times in 22 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	berk dual delete, no soot, and wrb brz

07-21-2013, 09:33 PM	#10
tech4pdx Make love Join Date: Nov 2012 Drives: H8R.. Not really Location: Edge of the Milky Way Posts: 780 Thanks: 524 Thanked 214 Times in 143 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	Crawford.. Overpipe back exhaust, secondary cat retained.. No soot.

07-24-2013, 06:46 PM	#13
Smoke Destructer Senior Member Join Date: Jun 2013 Drives: 2013 Whiteout FRS Location: North Carolina Posts: 106 Thanks: 26 Thanked 33 Times in 26 Posts Mentioned: 1 Post(s) Tagged: 2 Thread(s)	I've got a Borla axleback setup the dealership had put on my car, and I've noticed a lot of black junk on the back of my car too. For a while I figured it was just usual road grit or something, but now I'm not so sure. A couple people said you might be running rich, but if that was the case is there any way to confirm?

07-25-2013, 02:11 AM	#14
EN2_Squirrel Senior Member Join Date: Aug 2012 Drives: 2013 FR-S Location: San Diego Posts: 300 Thanks: 180 Thanked 58 Times in 46 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	made my own, no soot.are you getting alot of backfiring?

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