dumping exhaust right after muffler?

isaac338 · 02-28-2008, 06:59 PM

there's a couple of spots on the frame i can't reach easily because the haggard rusty stock exhaust pipe is in the way. it's real tempting to grab the sawzall and cut it off right at the muffler.

is it bad to have the exhaust dumping out horizontally under the bed? anyone done that and like the way it sounds?

thanks

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Jay351 · 02-28-2008, 07:20 PM

Having your exhaust dump under the bed is not a smart idea. Just another way to cause moisture under the bed/frame so it can rust out faster.

Cut out your exhaust, and get a new tailpipe made.

camo31"10.50" · 02-28-2008, 07:22 PM

or do what i did...go with exhaust stacks...im going 3.5in stacks behind the cab..2 1/4in tubing from header to stack...going to look GOOD...but im not sure on how it will sound...and it will keep my exhaust out of the water.

just a 22re · 02-28-2008, 07:24 PM

thats how mine is it dumps out the side kinda right out infront of the rear drivers tyre sound no differnt and i have no cat and a stock muff sounds fine but you do kinda smell it a lil after a wile but you with a pick up should have no problem with it i have a runner

jason191918 · 02-28-2008, 07:39 PM

My exhaust ends with the cherry bomb. I was putting tailpipes on every 2 yrs cuz they kept rusting off. Because of that and the fact that it sounds WAY better w/o the tailpipe, I just left it off. The next tailpipe that goes on there is gonna be stainless and oversized to fix both problems...prolly why I haven't done it yet...$$$

isaac338 · 02-28-2008, 09:03 PM

Quote:

Originally Posted by Jay351

Having your exhaust dump under the bed is not a smart idea. Just another way to cause moisture under the bed/frame so it can rust out faster.

Cut out your exhaust, and get a new tailpipe made.

somehow i don't think the steam from the exhaust on a cold day is going to accumulate in there too much.. i'd be more worried about caustic gases, but even that's a stretch.

maybe i'll just cut it off and clamp on a 90 deg bend pointing at the ground or the side or something

AndYota · 02-28-2008, 09:09 PM

I cut mine off right behind the rear axle and clamped on a turndown when I put my Marlin Crawler bumper on. I get a little gassed when I'm driving around really slow with the back window open, but that's the only time I notice anything bad. I'm not too sure about the condensation having any effect on the undercarriage. I also like the look of the 'Runner without an exhaust pipe dangling.

CJM · 02-28-2008, 09:21 PM

OR you could dump it right into the fenders or rocker panels.

stormin94 · 02-28-2008, 09:48 PM

If you feel you have to cut the exhaust off right after the muffler, make sure you route it out from under your rig, unless you want carbon monoxide to get inside the cab, and moisture around your frame. Maybe have it dump out before one of the tires.

rowdy235 · 02-28-2008, 09:50 PM

I would bend it down at a 45* angle, then cut it off level with the bottom of the pipe, so it goes down.

isaac338 · 02-29-2008, 06:17 AM

Quote:

Originally Posted by CJM

OR you could dump it right into the fenders or rocker panels.

no, that wouldn't pass a safety inspection.

isaac338 · 02-29-2008, 06:19 AM

Quote:

Originally Posted by stormin94

If you feel you have to cut the exhaust off right after the muffler, make sure you route it out from under your rig, unless you want carbon monoxide to get inside the cab, and moisture around your frame. Maybe have it dump out before one of the tires.

i'm not worried about exhaust in the cab; i have a pickup, so the only window is pretty far from the exhaust. do you guys really think the small amount of moisture is going to actually collect on the frame and cause any amount of rust? any more than the salt and snow and rain?

Belize Off Road Team · 02-29-2008, 06:23 AM

If you spray some rock gaurd or undersealer, you know the rubber stuff. then you don't have to worry, and here is a pic of it dumping my exhaust right after where the muffler should be:

Flash319 · 02-29-2008, 08:58 AM

I used to do it all the time but they won't do an E-test unless the pipe comes out from under the vehical. As far as I know it just has to be behind the cab when it comes out.

AndYota · 02-29-2008, 09:03 AM

I guess different states have different rules. I asked the emissions guy of my exhaust ending right after the rear axle was a problem and he looked at me like I was crazy. They don't care in NM, they're just interested in what comes out. I do want to get a new system made, but I'll have to wait until I have the money.

mrtejman · 02-29-2008, 09:13 AM

Quote:

Originally Posted by isaac338

somehow i don't think the steam from the exhaust on a cold day is going to accumulate in there too much.. i'd be more worried about caustic gases, but even that's a stretch.

maybe i'll just cut it off and clamp on a 90 deg bend pointing at the ground or the side or something

Thats what I did with my 3.slow and it sounded great, I tried it on my 2.7 and it sounds like crap

02-28-2008, 07:20 PM	#2 (permalink)
Jay351 Contributing Member Join Date: Feb 2007 Location: maple ridge, British Columbia, Canada Posts: 8,630	Having your exhaust dump under the bed is not a smart idea. Just another way to cause moisture under the bed/frame so it can rust out faster. Cut out your exhaust, and get a new tailpipe made. __________________ 91 Pickup - xcab - 5sp - 3.0 - SR5 - 4x4 - 250k \|2.25" catback w/ magnaflow cat + glasspack \| Weasy2k cams \| Aisin manual hubs \| Diff breather mod\| Marlin HD clutch \|3" BL \| es3000's \|2" AAL \|1.5" bj spacers \| ISR \| Alpine headunit \| 4" Infinity fronts/5" rears \| 4.88's \|Rear lockright \| 33x12.50" BFG M/T on 15x8" steelies \|Hella 500's \|4" reverse lights\| Grant GT \|idler arm brace\|hella E-codes\| Marlin armor \|SS IFS brace \| %100 Amsoil synthetic http://www.cardomain.com/ride/2572486

02-28-2008, 07:22 PM	#3 (permalink)
camo31"10.50" Registered User Join Date: Aug 2007 Location: Vian, OK Posts: 2,063	or do what i did...go with exhaust stacks...im going 3.5in stacks behind the cab..2 1/4in tubing from header to stack...going to look GOOD...but im not sure on how it will sound...and it will keep my exhaust out of the water. __________________ FOR SALE 1986 Ext. Cab 4x4, rebuilt 22R, 5spd, 31x10.50 X-Terrains FOR SALE 1992 SR5 FO RUNNA V6, 5 speed, 4in. trail-master lift, 33x12.50 BFG muds, 4.56 gears!!! and an IMMACULATE interior..yes..you should be jealous "Its still a toyota man.. Dont deprive it of its capabilities.." "If you can read english, Thank a teacher...If you can speak it, Thank a soldier!!" Kelli Ruark-2009

02-28-2008, 09:09 PM	#7 (permalink)
AndYota Contributing Member Join Date: Mar 2006 Location: Albuquerque, NM; Former NW Montana boy. Posts: 562	I cut mine off right behind the rear axle and clamped on a turndown when I put my Marlin Crawler bumper on. I get a little gassed when I'm driving around really slow with the back window open, but that's the only time I notice anything bad. I'm not too sure about the condensation having any effect on the undercarriage. I also like the look of the 'Runner without an exhaust pipe dangling. __________________ ------------------------------------------------ Driveway occupants: 1994 4Runner SR5 V6, 186,000 and going strong. 2007 WRX Wagon, the baby. 1988 Grand Wagoneer, the new patient. ------------------------------------------------

02-28-2008, 09:21 PM	#8 (permalink)
CJM Registered User Join Date: Aug 2006 Location: Central NJ Posts: 4,561	OR you could dump it right into the fenders or rocker panels. __________________ 96' T100 SR5 4x4, ISR mod, Custom ABS snorkel, KC 57's Hella optilux el cheapo backup lights. Cobra 19III CB, Firestick 4ft antenna, Bilstein shocks. Be polite. Be professional. But, have a plan to kill everyone you meet.

02-28-2008, 09:48 PM	#9 (permalink)
stormin94 Contributing Member Join Date: Jun 2007 Location: Lake County, CA/Sacramento Posts: 3,520	If you feel you have to cut the exhaust off right after the muffler, make sure you route it out from under your rig, unless you want carbon monoxide to get inside the cab, and moisture around your frame. Maybe have it dump out before one of the tires. __________________ 1994 Toyota 4Runner SR5 4X4 213,000 miles and counting 3.0 V6, 5 speed 10/15 MPG city/hwy(with 33's) Current Mods Headers, 2.5" Flowmaster custom exhaust, K&N FIPK KC Daylighter 100 Watt lights Ranchos x4, 2" Lift Downey coils 33-12.50 M/T's, 1" t-bar lift, 1" body lift Tow pkg w/ lighthookups Silverstar Headlights, Pioneer Deck w/XM Brushguard 250Watt JLAudio 8" W3 Sub Future Mods 12V Aux outlet-400/800peak inverter roof basket/lights Air locker 4.88 gears H.O. Alternator

02-28-2008, 09:50 PM	#10 (permalink)
rowdy235 Registered User Join Date: Sep 2007 Location: Sweet Home, OR Posts: 1,556	I would bend it down at a 45* angle, then cut it off level with the bottom of the pipe, so it goes down. __________________ The Daily Driver: 1998 Tacoma \| Regular Cab \| 4WD \| 2.7L \| 5-Speed Stick \| Mostly Stock The People-Hauler 1988 Grand Wagoneer \| SUV \| 4WD \| AMC 360 \| 3-Speed Auto \| All Stock The Dump Runner 1982 Pickup \| Regular Cab \| 2WD \| 22R \| 5-Speed Stick \| Custom Exhaust FER SALE! http://www.yotatech.com/f108/1982-sh.../#post51229916

02-29-2008, 06:23 AM	#13 (permalink)
Belize Off Road Team Contributing Member Join Date: Apr 2007 Location: Corozal Town, Belize Posts: 2,752	If you spray some rock gaurd or undersealer, you know the rubber stuff. then you don't have to worry, and here is a pic of it dumping my exhaust right after where the muffler should be: __________________ -Phyl 1991 Hilux Surf SSR-G Petrol 3.0L V6 200,000kms l Rancho RS5000 l 31"x10.50"xR15 Pro Comp Xterrain l K&N Air Filter l PP 1" Lift Coil Springs l Optima Blue Top l 12" JBL Subs l Alpine Type R l 80/100W Hella H4 l 1st Gen Roll Bar Mod l FT/RR Diff. Breathers l Smittybilt XRC8 Winch l ARB Bull Bar l トヨタ\|NEVER QUIT

02-29-2008, 08:58 AM	#14 (permalink)
Flash319 Registered User Join Date: Feb 2006 Location: Barrie, Ontario CANADA Posts: 1,356	I used to do it all the time but they won't do an E-test unless the pipe comes out from under the vehical. As far as I know it just has to be behind the cab when it comes out.

02-29-2008, 09:03 AM	#15 (permalink)
AndYota Contributing Member Join Date: Mar 2006 Location: Albuquerque, NM; Former NW Montana boy. Posts: 562	I guess different states have different rules. I asked the emissions guy of my exhaust ending right after the rear axle was a problem and he looked at me like I was crazy. They don't care in NM, they're just interested in what comes out. I do want to get a new system made, but I'll have to wait until I have the money. __________________ ------------------------------------------------ Driveway occupants: 1994 4Runner SR5 V6, 186,000 and going strong. 2007 WRX Wagon, the baby. 1988 Grand Wagoneer, the new patient. ------------------------------------------------

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