Buggy exhaust routing - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > General Tech > General 4x4 Discussion
Notices

Reply
 
Share LinkBack Thread Tools Display Modes
Old 12-02-2016, 05:10 PM   #1 (permalink)
Registered User
 
NorCal_Chris's Avatar
 
Join Date: Aug 2009
Member # 140551
Location: Sacramento CA
Posts: 1,894
Buggy exhaust routing

Wrote up this big ole post then closed it before i hit send so here we go agian

Trying to work out my exhaust 5.3 pass drop axle.

Seen a few do the pass header up and over the trans and then connect to the driver and go down the chassis. Like this



That was my original plan. Im just not too sure about all the heat going right by my feet. Maybe a heat shield between my exhaust and aluminum floor?

Then i saw this from sniper fab



Ive only ever seen LS motors with a Y pipe or an x/h pipe. IS there a reason i cant do it this way and make it way easier to package? I have simular room under my rockers for my mufflers just like this.

Or does anyone else have any ideas or suggestions?
__________________
adfasd
NorCal_Chris is offline   Reply With Quote Quick reply to this message
Old 12-02-2016, 05:26 PM   #2 (permalink)
Registered User
 
Join Date: Sep 2000
Member # 1636
Location: East Rutherford NJ
Posts: 8,890
Run dual through the rockers, or run a car intake and build up swept headers like a bomber. I've only seen a couple buggies with exhaust run over the bellhousing, all had heat issues and what you pictured is very restrictive. These engines need to breathe.
chris demartini is offline   Reply With Quote Quick reply to this message
Sponsored Links
Old 12-02-2016, 05:26 PM   #3 (permalink)
Registered User
 
Join Date: Apr 2011
Member # 189239
Location: Richfield, UT
Posts: 559
Packaging is the reason. The front driveline off the t case usually dictates which side you can fit the exhaust.
YROC FAB. is offline   Reply With Quote Quick reply to this message
 
Old 12-02-2016, 06:28 PM   #4 (permalink)
Registered User
 
Join Date: Nov 2007
Member # 103782
Location: Minden, Nevada
Posts: 763
All an "x", "y" or "h" pipe does is tie both sides of the engine together. It helps in scavenging the exhaust flow. Scavenging is when the flow of the last cylinder exhaust flow helps remove the next in the series and so on. This does help make more power because the left an right bank can work together. The power loss of no crossover pipe is minimal if I had to guess I'd say 3-5%. A crossover pipe also smooths the exhaust tone and will reduce noise 1-2 decibels.
__________________
-'86 runner SAS cookie cutter build....links coming soon!
-'89 xtracab mild built 22re, stock ifs with timbren bumps, 4.56s, 95 4runner front clip, fresh paint, full dynamat, clean interior, heated seats, a/c.... Nice 20mpg dd, wish it had cruise control.
iwannabemro is offline   Reply With Quote Quick reply to this message
Old 12-02-2016, 10:09 PM   #5 (permalink)
Registered User
 
Join Date: Sep 2005
Member # 53528
Location: norcal
Posts: 15,176
just an idea but you could maybe do a mix of both setups

do the dual exhaust but make a cross over pipe over the trans, only make it out of 1.5" ish pipe as it doesnt need to be full size imo
rockyota83 is offline   Reply With Quote Quick reply to this message
Old 12-03-2016, 03:25 PM   #6 (permalink)
Registered User
 
NorCal_Chris's Avatar
 
Join Date: Aug 2009
Member # 140551
Location: Sacramento CA
Posts: 1,894
Well this is good info. Saves me a ton of work and headache. Now I just need to look around and find what mufflers to run.

Rockyota I like your crossover idea. Wouldn't be that hard to toss a crossover in there. I'm just not sure how much of a difference that would make though with the distance between the banks. Would probably be 2ft apart. But it couldnt hurt.
__________________
adfasd
NorCal_Chris is offline   Reply With Quote Quick reply to this message
Old 12-03-2016, 04:03 PM   #7 (permalink)
Registered User
 
Join Date: Sep 2005
Member # 53528
Location: norcal
Posts: 15,176
Quote:
Originally Posted by NorCal_Chris View Post
Well this is good info. Saves me a ton of work and headache. Now I just need to look around and find what mufflers to run.

Rockyota I like your crossover idea. Wouldn't be that hard to toss a crossover in there. I'm just not sure how much of a difference that would make though with the distance between the banks. Would probably be 2ft apart. But it couldnt hurt.

honestly i couldnt say what if any difference it would make as im not experienced with exhaust systems and engine performance, it was merely an idea stemmed from observing the pics and the discussion.
rockyota83 is offline   Reply With Quote Quick reply to this message
Old 12-04-2016, 09:11 AM   #8 (permalink)
Rock God
 
scottapher's Avatar
 
Join Date: Jan 2009
Member # 126355
Location: tx
Posts: 1,896
Quote:
Originally Posted by NorCal_Chris View Post
Well this is good info. Saves me a ton of work and headache. Now I just need to look around and find what mufflers to run.
IMHO the best bang for your $ and space will be the dynomax race bullet. Super compact, and are produced in a multitude of lengths and diameters. But it'll be a loud
Attached Images
 
__________________

Bent Fabrications Evo 2 Coupe
IG: @RxOffroad
scottapher is offline   Reply With Quote Quick reply to this message
Old 12-04-2016, 10:22 AM   #9 (permalink)
Registered User
 
NorCal_Chris's Avatar
 
Join Date: Aug 2009
Member # 140551
Location: Sacramento CA
Posts: 1,894
Quote:
Originally Posted by scottapher View Post
IMHO the best bang for your $ and space will be the dynomax race bullet. Super compact, and are produced in a multitude of lengths and diameters. But it'll be a loud
I was looking at those race bullets. Price seemed pretty good and the size is killer.

How loud are we talking? I'm coming from a 4cyl so I'll be happy to hear some v8 whooopow. I guess if it's too loud I can route the exhaust out the back of my buggy instead of dumping behind seats.
__________________
adfasd
NorCal_Chris is offline   Reply With Quote Quick reply to this message
Old 12-04-2016, 11:18 AM   #10 (permalink)
Registered User
 
Join Date: Sep 2000
Member # 1636
Location: East Rutherford NJ
Posts: 8,890
I have 14x3 race bullets basically on the collectors of my long tube headers, with turn downs at the back of the subframe. It's loud but not open headers loud. Some tailpipes would quiet it up decently.
chris demartini is offline   Reply With Quote Quick reply to this message
Old 12-04-2016, 02:39 PM   #11 (permalink)
Rock Stacker
 
HydroDynamic's Avatar
 
Join Date: Jan 2006
Member # 65066
Location: Lost in the forest.
Posts: 1,372
Here's what I found out.
Chambered mufflers are too loud.
Fiberglass filled or high temp filled really takes the sound down.
The more filler the more sound absorption.
Offset inlet and outlet force sound into side of core as it bends absorbing sound.
Mufflers close to headers can handle the heat if they are good ones. Lots of companies offer collector mufflers that do burn out.
Filled mufflers can insulate heat better than straight pipe near the headers.
Long length exhaust can be more of a hassle and a safety issue than worth the performance gains.
I am now running dual Borla PRO XS 3" offset mufflers mounted right after the log manifolds and about 3 feet of 3 inch tube after the mufflers.

Last edited by HydroDynamic; 12-04-2016 at 02:42 PM.
HydroDynamic is online now   Reply With Quote Quick reply to this message
Old 12-04-2016, 02:52 PM   #12 (permalink)
Registered User
 
Join Date: Oct 2003
Member # 23853
Location: Houston
Posts: 1,154
Send a message via AIM to DarkEternal Send a message via Skype™ to DarkEternal
I run a single race bullet on my 5.3, its really not that bad. I do have a pretty long tail pipe (truck frame) which im sure helps some. Idle sounds nice, it only gets louder when you really get on it. Its quieter most of the time than a Jeep 4.0 with a glass pack.
DarkEternal is offline   Reply With Quote Quick reply to this message
Old 12-04-2016, 03:33 PM   #13 (permalink)
Registered User
 
Join Date: Sep 2000
Member # 1636
Location: East Rutherford NJ
Posts: 8,890
I had a single Moroso Spiral Flow muffler on my old buggy. It's definitely quieter than the race bullets but it still sounded great. It might not flow enough for a racer but for a trail rig it's perfect. about the size of a race bullet too.

chris demartini is offline   Reply With Quote Quick reply to this message
Old 12-04-2016, 03:49 PM   #14 (permalink)
Registered User
 
Join Date: Nov 2007
Member # 103621
Location: East Bernard, TX
Posts: 7,757
Quote:
Originally Posted by scottapher View Post
IMHO the best bang for your $ and space will be the dynomax race bullet. Super compact, and are produced in a multitude of lengths and diameters. But it'll be a loud

Scott, what size exhaust are you running? 2.5" all the way out? I was going to do a y pipe under the oil pan but with the driveshaft stuffed at full bump, on the passenger side it was extremely tight. Just couldn't get it to work. So I'm going to snake it out between the rockers and dump it passed the rear crossmember.
__________________
1982 Toyota - Dirt Squirrel - LQ4/Atlas 4.3, D60/14b w/ Reids & RCVs, 3-link/4-link, 43" stickies

Last edited by the_white_shadow; 12-04-2016 at 03:50 PM.
the_white_shadow is offline   Reply With Quote Quick reply to this message
Old 12-05-2016, 07:04 AM   #15 (permalink)
Rock God
 
scottapher's Avatar
 
Join Date: Jan 2009
Member # 126355
Location: tx
Posts: 1,896
Quote:
Originally Posted by the_white_shadow View Post
Scott, what size exhaust are you running? 2.5" all the way out? I was going to do a y pipe under the oil pan but with the driveshaft stuffed at full bump, on the passenger side it was extremely tight. Just couldn't get it to work. So I'm going to snake it out between the rockers and dump it passed the rear crossmember.
Yup, 2.5 aluminized all the way back. The stock C6 manifold opens up to 2.5 so I ran with it.
__________________

Bent Fabrications Evo 2 Coupe
IG: @RxOffroad
scottapher is offline   Reply With Quote Quick reply to this message
Old 12-05-2016, 08:26 AM   #16 (permalink)
Registered User
 
Join Date: Nov 2007
Member # 103621
Location: East Bernard, TX
Posts: 7,757
Quote:
Originally Posted by scottapher View Post
Yup, 2.5 aluminized all the way back. The stock C6 manifold opens up to 2.5 so I ran with it.
Yeah, I couldnt get a y-pipe to work so I switched out my ebay special block huggers to a set of LS3 Camaro manifolds.
__________________
1982 Toyota - Dirt Squirrel - LQ4/Atlas 4.3, D60/14b w/ Reids & RCVs, 3-link/4-link, 43" stickies
the_white_shadow is offline   Reply With Quote Quick reply to this message
Old 12-05-2016, 09:19 AM   #17 (permalink)
ARB,NITRO,RCV vendor
 
Barefoot_Offroad's Avatar
 
Join Date: Oct 2003
Member # 485986
Location: Pacific Northwest
Posts: 610
We're running a y-pipe that crosses under the oil pan to the passenger side where it merges to a 4" pipe, then routing to the magna flow race muffler.
Attached Images
 
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Lowest Prices on Lift Kits, Winches, Lockers, gears and much more
Marysville, WA
888-672-3305

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Barefoot_Offroad is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Pirate4x4.Com : 4x4 and Off-Road Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.

** A VERIFICATION EMAIL IS SENT TO THIS ADDRESS TO COMPLETE REGISTRATION!! **

Email Address:
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 11:59 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.