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Necoa #: 10766
Location: 18(N.CA,N.NV)
Joined: Jan 13, 2008
Posts: 121
Year: 1969
Model: El Camino
Posted: Wed Apr 09, 2008 11:34 am Post subject: backpressure??
does backpressure exsist in a v8 i know it does in the little ricers? but i was thinking of doing cherry bombs or even streight headers with pipes, but my friend brought up the point of back pressure and that i would have no low end if i went strieght out with no crossing, is he correct?
it does but why worry about it? theres no need to unless you use the correct diameter exhaust pipe. that and turbo applications _________________
Proud Wyotech Graduate
Necoa #: 7195
Location: 17(S.CA,S.NV)
Joined: Mar 26, 2006
Posts: 848
Year: 1977
Model: El Camino
Posted: Thu Apr 10, 2008 7:54 am Post subject:
Set your mind at ease, Glass Packs verses straight both will have the same flow. Glass packs in essence are a straight thru flow that has a side chamber or area that is packed with fiberglass or steel wool type of material. This design is for sound control only, and will not affect the flow to any degree. They will minimise the exhaust "POPS", or backfire "POPS" that can be as they use to say, "ticket bait". They also act somewhat like a spark arrestor. Glass Packs are not a chambered style design of muffler that re-routs the flow, or restricks the flow. _________________ http://elcaminocentral.com/gallery-album_CoyoteOn2s77Cage.html
Keep the Shiney Side Up
The Rubber Side Down !!
aka Larry
An X-pipe or H-pipe to what you are referring to most likely dont DEAL with backpressure they deal with the actualy FLOW of the exhaust gases and allow them to cross over to one another and project the sound waves to a more crisp sound wave which in return means better flow. WEITHER I got that correct I'm not 100% sure its been a while since i even thought of describing them. I can 100% guarantee this tho! It will give you more horse power and torque. In my opinion glass packs sound like crap, using a 2 chamber muffler such as Flowmaster...Knowing that your from nor cal probably near Sac Town the Flowmaster assembly plant isnt far! They are great mufflers have always used them and you get what you want out of them. _________________
Proud Wyotech Graduate
Necoa #: 7515
Location: 13(TX)
Joined: May 20, 2006
Posts: 117
Year: 1981
Model: El Camino
Posted: Sat Apr 12, 2008 6:01 pm Post subject:
Stop the text message talk. I have to go back and read every excuse for English that you spew at least 3 times before I can kind of get the concept of what you're trying to convey. Yes, backpressure exists. Why would it be dependent on the number of cylinders?
In my opinion, glasspacks sound like explosive diarrhea. Sure, they flow nice, but so do nowadays mufflers. An X pipe, would be good, but an H pipe would be louder. And I would not advise running straight pipes. It's illegal.
IF IT WERE ME! Id get a X pipe they flow better...Better flow means more power. ya digg? YOU DONT need to worry about back pressure there are more ugly ducklings you need to be worried about. Especially your emissions and if you live in Sac Town you need to worry about Sac Town police. THEY don't joke around. _________________
Proud Wyotech Graduate
Necoa #: 7515
Location: 13(TX)
Joined: May 20, 2006
Posts: 117
Year: 1981
Model: El Camino
Posted: Mon Apr 14, 2008 4:09 pm Post subject:
elcamman006 wrote:
im getting so many different answers about the back pressure what flows better x or H
ok like lol wut u wanna do is just go get sum flowmastrs and some stax and just have em stiking out the bak right behnd teh cab. u have 2 cut sum wholes for teh stax, but it would look badass. that wood have zero bakpreshure.
im getting so many different answers about the back pressure what flows better x or H
ok like lol wut u wanna do is just go get sum flowmastrs and some stax and just have em stiking out the bak right behnd teh cab. u have 2 cut sum wholes for teh stax, but it would look badass. that wood have zero bakpreshure.
just get a Z pipe and be dun wit it
get a z pipe? give me a BREAK _________________
Proud Wyotech Graduate
im getting so many different answers about the back pressure what flows better x or H
ok like lol wut u wanna do is just go get sum flowmastrs and some stax and just have em stiking out the bak right behnd teh cab. u have 2 cut sum wholes for teh stax, but it would look badass. that wood have zero bakpreshure.
just get a Z pipe and be dun wit it
Okay, That's enough of that.
Doug _________________ 85 El Camino 305, TH350, K&N, dual exhausts
87 El Camino 305, 2004R, K&N, dual exhausts
1964-1/2 Mustang conv, 260 V8, dual exhausts
2002 Jaguar XJ8, 2000 Harley Road King
Lakewood, CO
Necoa #: 2321
Location: 15(AZ,NM)
Joined: Jan 30, 2004
Posts: 1169
Year: 1974
Model: El Camino
Posted: Tue Apr 15, 2008 1:47 am Post subject:
A little backpressure can be a good thing. Helps scavenge the cylinders. Too much is bad but a little is good. Right now when I let off on the gas on the freeway I can actually hear the exhuast burble which is neat. I had the same thing on my 79 Z28 and it was awesome.
_________________ 74 El Camino Classic - project car #1
96 Camaro - RIP, Traded 10-16-2007
2008 Mustang GT, It ain't a Chevy but at least it's American!
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