Exhaust question: Weird smell, because not dumped? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TIMSPEED · 09-24-2003, 06:34 AM

ok, here's my scenario...I've tuned and tuned and TUNED the carb, and everything I've done said the carb is DEAD-ON Air/Fuel at WOT...but everytime I romp on it, I get a WEIRD smell..now here's my question...is the weird smell caused just because I have a REALLY high flowing exhaust? (Long Tube Headers, Mandrel Bent Section through the Transmission Xmember, 2½" Piping into Straight-Through Hooker Maximum Flow Mufflers) Here's a picture of my exhaust, in fact:
I think my problem is...my exhaust is exiting directly under my bed and when I romp on it, the fumes are coming up between the cab and the bed, and I'm smelling them. (I always have the back window open)
Would either dumping the exhaust or running it out the rear sides solve my problem you think?
P.S.- I'm not getting ANY black smoke when I go WOT...

TIMSPEED · 09-24-2003, 06:36 AM

Oops, forgot the pic...here it is...

*1FaastC10* · 09-24-2003, 09:23 AM

im thinking its a little on the short side, so what you're suspecting could be true. most auto parts stores carry shot lengths of pipe, and turndowns. maybe you can try that and see if it helps your problem any, and then possibly go for a more permanent solution.

low 84 · 09-24-2003, 11:04 AM

looks just like my exhaust

BigRed · 09-24-2003, 11:50 AM

Quote:

Originally posted by low 84
looks just like my exhaust

Even if it doesn't fix the smell problem, I'd definitely get some turn downs on there to force the exhaust down and/or out.

79BIG10 · 09-24-2003, 01:12 PM

I agree with Scott. You need to have some turndowns to help exit the exhaust out to keep you from smelling that.

LOHRTBT · 09-24-2003, 02:07 PM

I just wanna know how you got your truck to hover like that!! lol

ItsNotABlazer · 09-24-2003, 04:05 PM

Quote:

Originally posted by LOHRTBT
I just wanna know how you got your truck to hover like that!! lol

He uses David Blaine as his mechanic maybe?

I have turndowns on my Jimmy dumped at the rearend and I still notice it. Rebuilt 355, large cam, performer RPM, Holley 600, cheapo hedman headers and exhaust pipe thats almost as old as the truck probably.

Brad

**N2TRUX** · 09-24-2003, 06:53 PM

Turn downs (or outs) may not help, but I'm sure they would hurt. If you always run with your back glass open, whatever comes out of the pipe is going to migrate back in the cab....

09-24-2003, 06:34 AM	#1
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	Exhaust question: Weird smell, because not dumped? ok, here's my scenario...I've tuned and tuned and TUNED the carb, and everything I've done said the carb is DEAD-ON Air/Fuel at WOT...but everytime I romp on it, I get a WEIRD smell..now here's my question...is the weird smell caused just because I have a REALLY high flowing exhaust? (Long Tube Headers, Mandrel Bent Section through the Transmission Xmember, 2½" Piping into Straight-Through Hooker Maximum Flow Mufflers) Here's a picture of my exhaust, in fact: I think my problem is...my exhaust is exiting directly under my bed and when I romp on it, the fumes are coming up between the cab and the bed, and I'm smelling them. (I always have the back window open) Would either dumping the exhaust or running it out the rear sides solve my problem you think? P.S.- I'm not getting ANY black smoke when I go WOT... __________________ I have a few cars... See Them Here

09-24-2003, 06:36 AM	#2
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	Oops, forgot the pic...here it is... Attached Images __________________ I have a few cars... See Them Here

09-24-2003, 11:04 AM	#4
low 84 Registered User Join Date: Jan 2002 Location: Houston, TX Posts: 2,144	looks just like my exhaust __________________ '51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works '05 1500 Crew Cab RIP '84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker '80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's

09-24-2003, 01:12 PM	#6
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	I agree with Scott. You need to have some turndowns to help exit the exhaust out to keep you from smelling that. __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

09-24-2003, 02:07 PM	#7
LOHRTBT BeWarE tHe eViL CrAnkTOe! Join Date: Oct 2002 Location: Yukon, OK Posts: 3,605	I just wanna know how you got your truck to hover like that!! lol __________________ ~Dave~ You can call me Mike, Mike Oxlong - 1986 Chevy SWB - Stock for now - *1986 Chevy Custom SWB* *Stolen 6/26/05* - 1985 Chevy SWB SOLD - 1999 T/A Some mods www.cardomain.com/id/ramairdave AIM Screenname - Jester84

09-24-2003, 09:23 AM	#3
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	im thinking its a little on the short side, so what you're suspecting could be true. most auto parts stores carry shot lengths of pipe, and turndowns. maybe you can try that and see if it helps your problem any, and then possibly go for a more permanent solution.

09-24-2003, 06:53 PM	#9
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,021	Turn downs (or outs) may not help, but I'm sure they would hurt. If you always run with your back glass open, whatever comes out of the pipe is going to migrate back in the cab.... __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"



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