quick exhaust question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

messed up c-10 · 03-19-2003, 02:25 PM

Do you lose any performance by exiting your exhaust all the way out the back as compared to dumping it at the axle or exiting in front of the rear wheels?

79BIG10 · 03-19-2003, 02:28 PM

The more bends you have and the longer the pipe the more you lose power. You want it to exit out fast but with the least amount of hard bends. But you don't want a short pipe either. Least I would do is dumped under the bed. Plenty of backpressure then and still exiting fast enough.

messed up c-10 · 03-19-2003, 02:32 PM

it would probably be alot easier and and a little cheaper to exit before the axle. I can't wait to get rid of those Purple Hornies. I'm giving them to my friend to put on his '79 K5.

79BIG10 · 03-19-2003, 02:34 PM

What are you getting for mufflers?

messed up c-10 · 03-19-2003, 02:34 PM

I'm planing on going with the Aerochambers

LOHRTBT · 03-19-2003, 03:09 PM

good choice!

79BIG10 · 03-19-2003, 03:12 PM

Very good choice!! I wish I had now

messed up c-10 · 03-19-2003, 03:32 PM

Are resonator tips good or bad? Do they increase noise or decrease it?

79BIG10 · 03-19-2003, 03:33 PM

They increase as well as make it deeper.

LOHRTBT · 03-19-2003, 03:34 PM

you wont need them if your running headers....trust me.

79BIG10 · 03-19-2003, 03:37 PM

I agree. Wait to add them you may not want them.

messed up c-10 · 03-19-2003, 03:49 PM

ok. I thought they killed noise. Now I know thanks guys

**swervin ervin** · 03-19-2003, 04:42 PM

You will love the Aerochambers for sure. Best sounding muffler I've used. I've been though Dynomax Super Turbos, and slowmasters. They don't compare to the Aeros.

RockHQ · 03-20-2003, 05:23 PM

Here you can find a dyno run done by V8-Magazine Finland back in '95. Doesn't list many mufflers but i thought it might be an interesting read. You can see the difference between various mufflers is minimal with a slightly tricked 454, so i'd say it will be even less with a 350 or a 305.
Another interesting tidbit about backpressure: compared to straight pipes (minimal backpressure), the best muffler provides an average of 0.7% more torque.

03-19-2003, 02:25 PM	#1
messed up c-10 RHCP afficianado Join Date: Oct 2002 Location: McLoud, OK Posts: 789	quick exhaust question Do you lose any performance by exiting your exhaust all the way out the back as compared to dumping it at the axle or exiting in front of the rear wheels? __________________ ~Ryan~ 89 S-10 Blazer with a 4.3L 96 Ford Crown Vic P71 4.6L V8. This car rocks. Here are some links to some good music. Jack Johnson Donavon Frankenreiter

03-19-2003, 02:28 PM	#2
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	The more bends you have and the longer the pipe the more you lose power. You want it to exit out fast but with the least amount of hard bends. But you don't want a short pipe either. Least I would do is dumped under the bed. Plenty of backpressure then and still exiting fast enough. __________________ 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

03-19-2003, 02:32 PM	#3
messed up c-10 RHCP afficianado Join Date: Oct 2002 Location: McLoud, OK Posts: 789	it would probably be alot easier and and a little cheaper to exit before the axle. I can't wait to get rid of those Purple Hornies. I'm giving them to my friend to put on his '79 K5. __________________ ~Ryan~ 89 S-10 Blazer with a 4.3L 96 Ford Crown Vic P71 4.6L V8. This car rocks. Here are some links to some good music. Jack Johnson Donavon Frankenreiter

03-19-2003, 02:34 PM	#4
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	What are you getting for mufflers? __________________ 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

03-19-2003, 02:34 PM	#5
messed up c-10 RHCP afficianado Join Date: Oct 2002 Location: McLoud, OK Posts: 789	I'm planing on going with the Aerochambers __________________ ~Ryan~ 89 S-10 Blazer with a 4.3L 96 Ford Crown Vic P71 4.6L V8. This car rocks. Here are some links to some good music. Jack Johnson Donavon Frankenreiter

03-19-2003, 03:09 PM	#6
LOHRTBT BeWarE tHe eViL CrAnkTOe! Join Date: Oct 2002 Location: Yukon, OK Posts: 3,605	good choice! __________________ ~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

03-19-2003, 03:12 PM	#7
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	Very good choice!! I wish I had now __________________ 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

03-19-2003, 03:32 PM	#8
messed up c-10 RHCP afficianado Join Date: Oct 2002 Location: McLoud, OK Posts: 789	Are resonator tips good or bad? Do they increase noise or decrease it? __________________ ~Ryan~ 89 S-10 Blazer with a 4.3L 96 Ford Crown Vic P71 4.6L V8. This car rocks. Here are some links to some good music. Jack Johnson Donavon Frankenreiter

03-19-2003, 03:33 PM	#9
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	They increase as well as make it deeper. __________________ 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

03-19-2003, 03:34 PM	#10
LOHRTBT BeWarE tHe eViL CrAnkTOe! Join Date: Oct 2002 Location: Yukon, OK Posts: 3,605	you wont need them if your running headers....trust me. __________________ ~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

03-19-2003, 03:37 PM	#11
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	I agree. Wait to add them you may not want them. __________________ 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

03-19-2003, 03:49 PM	#12
messed up c-10 RHCP afficianado Join Date: Oct 2002 Location: McLoud, OK Posts: 789	ok. I thought they killed noise. Now I know thanks guys __________________ ~Ryan~ 89 S-10 Blazer with a 4.3L 96 Ford Crown Vic P71 4.6L V8. This car rocks. Here are some links to some good music. Jack Johnson Donavon Frankenreiter

03-19-2003, 04:42 PM	#13
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	You will love the Aerochambers for sure. Best sounding muffler I've used. I've been though Dynomax Super Turbos, and slowmasters. They don't compare to the Aeros. __________________ Mike 1985 Chevy C-10

03-20-2003, 05:23 PM	#14
RockHQ ROCKET POWER! Join Date: Feb 2003 Location: Finland, Europe Posts: 509	Here you can find a dyno run done by V8-Magazine Finland back in '95. Doesn't list many mufflers but i thought it might be an interesting read. You can see the difference between various mufflers is minimal with a slightly tricked 454, so i'd say it will be even less with a 350 or a 305. Another interesting tidbit about backpressure: compared to straight pipes (minimal backpressure), the best muffler provides an average of 0.7% more torque. __________________ What did i do last nite? I had a wonderful time, That's what they tell me What did i do last nite? 1979 C-10 shortfleet: Olds 350, Th400, 12 bolt Current project: 1969 Olds 455 W-30, needing a rebuild

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