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I read on here awhile back that someone on the forum put side pipe covers over way bigger than stock side pipes. But now I cant find the thread. Can anyone tell me how much bigger pipe can be used. I remember the guy used spacer blocks.
I think 3" is about the limit. But I don't think there is any benefit to that large a pipe.
Mufflers with a 3 1/2" body will fit under the original shields. Classic chambered makes some - http://www.classicchambered.com/ and their site shows the retro-fit.
As far as no benefit, why do you think under car exhaust flows better & makes more HP than side exhaust? I just built the side exhaust for my big block using Classic Chambered mufflers with a 3 1/2" body and 2 1/2" flow path and they fit fine. If you wonder why the stock side exhaust is SO restrictive, here's a pic. of my factory sidepipe when I cut them open. The flow path is just under 1 1/2".
Mufflers with a 3 1/2" body will fit under the original shields. Classic chambered makes some - http://www.classicchambered.com/ and their site shows the retro-fit.
As far as no benefit, why do you think under car exhaust flows better & makes more HP than side exhaust? I just built the side exhaust for my big block using Classic Chambered mufflers with a 3 1/2" body and 2 1/2" flow path and they fit fine. If you wonder why the stock side exhaust is SO restrictive, here's a pic. of my factory sidepipe when I cut them open. The flow path is just under 1 1/2".
Wow. That is crazy. I suppose if you had a full 3" ID it would flow pretty well. I just recall seeing diminished performance on dyno on pipes larger than 2.5" but don't quote me on it. That was something I read 20 years ago.
I have to think 3.5 would be very tight.
I wonder if the race versions had that restriction. Apparently it was pure aesthetics. ******* awesome aesthetics.
Last edited by TJefferson2020; Oct 13, 2017 at 10:22 PM.
Supposedly the only benefit is at high RPM's, so if that's what you're looking for it should help. But I read that it reduces torque also. This is just what I've read in mags, I have no personal experience.
Mufflers with a 3 1/2" body will fit under the original shields. Classic chambered makes some - http://www.classicchambered.com/ and their site shows the retro-fit.
As far as no benefit, why do you think under car exhaust flows better & makes more HP than side exhaust? I just built the side exhaust for my big block using Classic Chambered mufflers with a 3 1/2" body and 2 1/2" flow path and they fit fine. If you wonder why the stock side exhaust is SO restrictive, here's a pic. of my factory sidepipe when I cut them open. The flow path is just under 1 1/2".
My headers into a 4 inch pipe with a 8 inch long baffle in i believe flows much better than any under car exhaust & i love the sound . Just me
Supposedly the only benefit is at high RPM's, so if that's what you're looking for it should help. But I read that it reduces torque also. This is just what I've read in mags, I have no personal experience.
So you're saying you have no experience and are just regurgitating what you've read.
With 40+ years of actual experience building both small and big block performance cars, I can tell you that putting 1 1/2" pipes on any performance car will do nothing but decrease performance.
So you're saying you have no experience and are just regurgitating what you've read.
With 40+ years of actual experience building both small and big block performance cars, I can tell you that putting 1 1/2" pipes on any performance car will do nothing but decrease performance.
What's your problem? All I did was try to help. I don't try to tell people I'm an expert like some others who think they know it all! Sound familiar? KMA
What's your problem? All I did was try to help. I don't try to tell people I'm an expert like some others who think they know it all! Sound familiar? KMA
I have no problem. I'm posting ACTUAL facts with pictures and relaying ACTUAL experience. You posted what you've read with NO experience. I only post on things that I've actually done, unlike many "keyboard experts" on this forum, sound familiar?
I have no problem. I'm posting ACTUAL facts with pictures and relaying ACTUAL experience. You posted what you've read with NO experience. I only post on things that I've actually done, unlike many "keyboard experts" on this forum, sound familiar?
People like you make me laugh, I wish you lived closer so we could meet. I'm sure you'd never show up though. You'd be too busy with actual experience. What a ...
1snake, I don't want you to think you've won, I just put you on my ignore list so I don't have to deal with people like you. I won't be seeing any more BS from Puget Sound.
I have Classic Chambered 3 1/2" outer shell with 2 1/2" flowpath Vettepacks under stock covers with a tad wiggle room to spare. Four inch outers require a 1/2" rocker spacer which is available in the aftermarket. I dynoed my engine and it produced 414 RWHP with open headers. Thru the pipes it dropped only 8 to 406 RWHP. The sound is loud as all getout when you press to go pedal but mellows nicely at steady cruise and the sound is mellower than stock sidepipe mufflers.
Just so you know: anyone that says "you need some backpressure in order to make torque" is full of shlt.
Last edited by 65tripleblack; Oct 14, 2017 at 10:01 AM.
The reason for me is that engine is a bbc 496 with stahl headers with 2 1/8 primaries and 4" collectors and 4" side pipes no baffles. The engine likes RPM starts making 600 hp at 5200 and tops out at 726 hp at 7100 and still pulls hard to about 8000
I have Classic Chambered 3 1/2" outer shell with 2 1/2" flowpath Vettepacks under stock covers with a tad wiggle room to spare. Four inch outers require a 1/2" rocker spacer which is available in the aftermarket. I dynoed my engine and it produced 414 RWHP with open headers. Thru the pipes it dropped only 8 to 406 RWHP. The sound is loud as all getout when you press to go pedal but mellows nicely at steady cruise and the sound is mellower than stock sidepipe mufflers.
Just so you know: anyone that says "you need some backpressure in order to make torque" is full of shlt.
Your posts in an old thread were the reason I went with Classic Chambered. I can't believe how restrictive the O.E.M. sipe exhaust is. I haven't fired mine up as I'm doing a body-off resto. but noise is not really an issue. It couldn't be louder than my Cobra was.
The reason for me is that engine is a bbc 496 with stahl headers with 2 1/8 primaries and 4" collectors and 4" side pipes no baffles. The engine likes RPM starts making 600 hp at 5200 and tops out at 726 hp at 7100 and still pulls hard to about 8000
Do you have any sound clips of that engine. It must sound awesome. I love big blocks and the bigger, the better. I was/am toying with the idea of storing my 427 and putting in a 496 from Blueprint Engines.
Do you have any sound clips of that engine. It must sound awesome. I love big blocks and the bigger, the better. I was/am toying with the idea of storing my 427 and putting in a 496 from Blueprint Engines.
I do have a video of it on the dyno but can't get it to down load. It will be some time before it goes in the car. I do have a run-in stand I mite put it on, a friend of mine wants to hear it to. Its a pump gas motor but sounds very nasty like it has a bunch of compression. Can't wait to get the car done
I put 2 1/2" flow Stainless Works pipes on my car along with new side covers a few years ago. The odor of burning resin was apparent from the get go. I haven't had the covers off lately. At some point I will have to get replacement insulation. Then, I will figure out how to shim the covers out for clearance.
side pipe covers
