EXHAUST QUESTIONS ANSWERED BY AN EXHAUST TECH

[Heathx4]

Currently it has extractors on both sides that join to single pipes via a 3 bolt sandwich. The driver side pipe wraps close to sump and crosses over the other one before joining it ~400mm later into a single 3".

Tonight I was able to unbolt the passenger side, but couldn't get a spanner on one of the bolts in the drivers side.

Bah, spent a few minutes angle grinding this pipe under the sump. Couldn't get all the way around the pipe though and gave that up after making a couple of deep nicks in the sump hacksawed upside down for another 20 minutes or so and couldn't get through. Decided to try undoing the extractors from the head on that side, and what do you know? Piece of cake (ignoring the squashed fingers and dropped tools trying to get at the bolts tucked behind the pipes)! Then once the extractors were off, and since the flange was undone on the other side, I could lean the pipes away from the engine and get a spanner on the single remaining flange bolt. So now the engine and exhaust is out, and the pipe under the sump is holding on by 20mm of nicked metal.

[BundyMonkey]

Dr Ex

I have recently fitted a pyrometer into My 2.4TD and I seem to have a bit of an issue with the exhaust temps reaching 500 would a larger straight through system fix this?

Thanks

Andrew

[JrZook]

Gday mate,

Just chasing a bit of advise on getting a nice note outta my 1.3l serria. Atm its running lukey extractors and a lukey stright thru with a resonator up front (bout 2 inches away from the extractors) and a 2 inch pipe. What mufflers would you suggest to make it not sound like an old truck (the drianpipe sound). Im just after a nice crisp note, not droney. Wat difference would it make running the resonator after the muffler in sound?
Cheers Dan

[EXHAUSTFIX]

Dr Ex

I have recently fitted a pyrometer into My 2.4TD and I seem to have a bit of an issue with the exhaust temps reaching 500 would a larger straight through system fix this?

Thanks

Andrew

yes it would

by putting a big straight through system you will increase flow and this will also help with heat it will not build up as much in the system

[EXHAUSTFIX]

Gday mate,

Just chasing a bit of advise on getting a nice note outta my 1.3l serria. Atm its running lukey extractors and a lukey stright thru with a resonator up front (bout 2 inches away from the extractors) and a 2 inch pipe. What mufflers would you suggest to make it not sound like an old truck (the drianpipe sound). Im just after a nice crisp note, not droney. Wat difference would it make running the resonator after the muffler in sound?
Cheers Dan

you need an ofset ofset 2" muffler about 18" long
mandrell bent purferated tube internal not chambered if its still to loud put a resenator in the tail

ross

[BundyMonkey]

Dr Ex

I have recently fitted a pyrometer into My 2.4TD and I seem to have a bit of an issue with the exhaust temps reaching 500 would a larger straight through system fix this?

Thanks

Andrew

yes it would

by putting a big straight through system you will increase flow and this will also help with heat it will not build up as much in the system

This is on a Toyota Bundera what sort of $$$ would I be looking at?

[EXHAUSTFIX]

Dr Ex

I have recently fitted a pyrometer into My 2.4TD and I seem to have a bit of an issue with the exhaust temps reaching 500 would a larger straight through system fix this?

Thanks

Andrew

yes it would

by putting a big straight through system you will increase flow and this will also help with heat it will not build up as much in the system

This is on a Toyota Bundera what sort of $$$ would I be looking at?

AROUND $320.00

[BundyMonkey]

Thanks

[Patroler]

G'day mate, ive got a gq td42, looking at turboing it when funds permit, was just wondering if there would be any disadvantage to making the exhaust up out of 3" 304 stainless tube and mandrel bends, i can get this stuff for free, if im patient (picked up 2 45s and 2 90s last night) and can weld it no dramas.

Thanks in advance.

[j-top paj]

gday mate,
got a question as to what size exhaust i should run on my GU tb45e?
was thinking 2.5inch? but the standard exhaust looks like its a bit bigger than 2inch so would 2.5inch make enough of a difference?
maybe 3inch? or would that be too big?

thanks mate.

[EXHAUSTFIX]

G'day mate, ive got a gq td42, looking at turboing it when funds permit, was just wondering if there would be any disadvantage to making the exhaust up out of 3" 304 stainless tube and mandrel bends, i can get this stuff for free, if im patient (picked up 2 45s and 2 90s last night) and can weld it no dramas.

Thanks in advance.

by all means
you will get a very good power increase and your turbo will spool up a lot quicker
ross

[EXHAUSTFIX]

gday mate,
got a question as to what size exhaust i should run on my GU tb45e?
was thinking 2.5inch? but the standard exhaust looks like its a bit bigger than 2inch so would 2.5inch make enough of a difference?
maybe 3inch? or would that be too big?

thanks mate.

a non turbo engine relys on the right pipe size to acheive the right das speed
if you go to big you wil loose low down torque
do not go 3 " that is to big
2.5" would be the max for that, use a large straight through muffler in the front and a good resenator in the rear

ross

[Chucky]

A mate of mine just bougt a new vz dunnydore ute. It's got the 3.6 litre in it and he has been told of a different system at each place he goes to and generally has no idea which way to go.
The ute is just a personal car, he just wants it to sound good. It does get driven on long drives often as he lives in Mt Isa so having a real loud system than just drones on in the car is out of the question.
Any ideas on what to run would be helpful.

Cheers

[EXHAUSTFIX]

A mate of mine just bougt a new vz dunnydore ute. It's got the 3.6 litre in it and he has been told of a different system at each place he goes to and generally has no idea which way to go.
The ute is just a personal car, he just wants it to sound good. It does get driven on long drives often as he lives in Mt Isa so having a real loud system than just drones on in the car is out of the question.
Any ideas on what to run would be helpful.

Cheers

THE BEST THING FOR THAT IS A REDBACK 2.5"SINGLE SYSTEM
THEY ARE STRAIGHT THROUGH BUT HAVE 2 LARGE MUFFLERS NOT VERY LOUD JUST A MILD NOTE AND ALMOST NO DRONE IN THE CAB

ROSS

[shakes]

I'm running an old leyland p76 4.4ltr, stroked to 4.7ish running around 10:1 compression (havent done the maths yet) the motor hasnt been run in yet if that makes a difference, it also has huuuge amounts of vacuum. Its in a 83 rangerover btw.

whats my best options in terms of extractors and exhaust in regards to getting the most torque outa the motor? noise and whatnot isnt a problem as long as I dont get done by the EPA.

p.s. sorry if this has been asked before... you almost need a forum of your own!!

cheers

Simon

[Nat84]

how well do you think one 3" stack on 82 hilux will go?

i'am thinking 2 1/2 inch system with one muffler and 3" stack

Lot of Rednecks around here run stacks and they mostly run a 2" inside the 3-4" stack

4sum4 knows the rednecks.

man i reckon it will go dud and you should leave it how it is....

all ya need now is the line of orange blinkers up both sides of the car some over sized mudflaps and bundy rum sticker on every window
some cb aerials twice the length of the car and a bull bar that looks like it came off a mack truck, then u c an think of zorst stacks

code name : Suburban Cowboy

my stack has a nice note to it but i have not yet driven it so don't know about the back pressure (going for blue slip)

i can get bull bars that look like mack truck one from an F100 but to heavey

the bull bar would be bigger then the lux

do you run 1 or 2 stacks

i run 1 stack for know will go 2 stacks when i put in the 350 chev

[Patroler]

G'day mate, ive got a gq td42, looking at turboing it when funds permit, was just wondering if there would be any disadvantage to making the exhaust up out of 3" 304 stainless tube and mandrel bends, i can get this stuff for free, if im patient (picked up 2 45s and 2 90s last night) and can weld it no dramas.

Thanks in advance.

by all means
you will get a very good power increase and your turbo will spool up a lot quicker
ross

nice one, thanks mate

[Luv to 4B]

Dr Ex,
Have 1KZ TE hilux ( factory 3 L turbo), my exhaust temp reaches 500 degs when hauling ass, what is the highest exhaust temp i can run in this motor without seriously putting the motor and turbo at risk, as i plan on turning the boost up a bit (13.5 to 14 psi)?

Also i currently run a 2.5 inch press bent exhaust with high flow muffler, would it be better to go 2.5 or 3 inch mandrel bent with same muffler and drop the exhaust out infront of the rear wheel?

Thanks heaps Luv to 4B

[EXHAUSTFIX]

Dr Ex,
Have 1KZ TE hilux ( factory 3 L turbo), my exhaust temp reaches 500 degs when hauling ass, what is the highest exhaust temp i can run in this motor without seriously putting the motor and turbo at risk, as i plan on turning the boost up a bit (13.5 to 14 psi)?

Also i currently run a 2.5 inch press bent exhaust with high flow muffler, would it be better to go 2.5 or 3 inch mandrel bent with same muffler and drop the exhaust out infront of the rear wheel?
that exhaust should be ok
you cant put it out in front of the wheel on the passinger side that is not legal it is the perdestran side of the road

500 deg is not that bad your port temp is about 600

Thanks heaps Luv to 4B

[fnqcairns]

I have a long wheelbase GQ patrol 4.2 non turbo diesel totally stock. The original muffler in this thing is huge! and rusting through from the outside. What is my best option apart from genuine for replacement with one that is hopefully not noisier and may increase fuel economy/power?

Curious what would be the result if I fitted 2 hotdogs in-line instead of another muffler? There is already a muffler shaped genuine resinator at the tailpipe.

thanks fnq

[Tomolux]

car: yn65 hilux
engine: 1Uz-Fe (toyota V8)
need: Low down torque
other: extractors, intake. rest stock. no exhaust yet. auto

i was thinking twin (2" or 2.25"??) into Y pipe, into 2.5" single pipe next to g/box, 3" cat, undercab then up the back of the cab into a single oval muffler 2.5" inlet with twin outlets, then twin mini stacks coming up though the front of the tray.

i need maximum low down torque that i can get, what is your opinion on pipe size and muffler choice. do u think i should get a resonator (oval or hotdog).

whatever i need to do or should change to get more torque, i would love to know thankyou.

pic of the front part of the exhaust can be found here
http://www.lextreme.com/forums/showthre ... ge=6&pp=20

[j-top paj]

thanks mate, will do the 2.5 inch once i get the extractors

was thinking pacemakers? any recomendations?

[EXHAUSTFIX]

I have a long wheelbase GQ patrol 4.2 non turbo diesel totally stock. The original muffler in this thing is huge! and rusting through from the outside. What is my best option apart from genuine for replacement with one that is hopefully not noisier and may increase fuel economy/power?

Curious what would be the result if I fitted 2 hotdogs in-line instead of another muffler? There is already a muffler shaped genuine resinator at the tailpipe.

thanks fnq

THAT WOULD NOT BE QUIET ENOUGH
YOU WOULD NEED AN EXTRELY LARGE STRAIGHT THROUGH MUFFLER SOMETHING LIKE A 11X6X22"MUFFLER YOU CAN BUY THESE

[EXHAUSTFIX]

car: yn65 hilux
engine: 1Uz-Fe (toyota V8)
need: Low down torque
other: extractors, intake. rest stock. no exhaust yet. auto

i was thinking twin (2" or 2.25"??) into Y pipe, into 2.5" single pipe next to g/box, 3" cat, undercab then up the back of the cab into a single oval muffler 2.5" inlet with twin outlets, then twin mini stacks coming up though the front of the tray.

i need maximum low down torque that i can get, what is your opinion on pipe size and muffler choice. do u think i should get a resonator (oval or hotdog).

whatever i need to do or should change to get more torque, i would love to know thankyou.

pic of the front part of the exhaust can be found here
http://www.lextreme.com/forums/showthre ... ge=6&pp=20

IF YOU WANT LOW DOWN TORQUE KEEP YOU PIPE SIZES SMALL WITH GOOD STRAIGHT MUFFLERS
i would run twin 2" with an x pipe in it and 2 magnaflow s/steel muffler they flowvery well and are the quietest straight through muffler on the market you may need hoy dogs in your stacks but i dought it

ross

[EXHAUSTFIX]

I'm running an old leyland p76 4.4ltr, stroked to 4.7ish running around 10:1 compression (havent done the maths yet) the motor hasnt been run in yet if that makes a difference, it also has huuuge amounts of vacuum. Its in a 83 rangerover btw.

whats my best options in terms of extractors and exhaust in regards to getting the most torque outa the motor? noise and whatnot isnt a problem as long as I dont get done by the EPA.

p.s. sorry if this has been asked before... you almost need a forum of your own!!

cheers

Simon

tey seem to respond well to extraxtors and 2.5" single system as they are only small v8

[mrx78u]

Hi Ross,

Was wondering if it would be possible to get any useful gains out of my 88' pajero 2.6 (astron 2). Was hoping for slightly better economy and possible some more power without moving the torque too far up the rev range. I'm not far from your workshop, so might be some work for you too.

Cheers,
Mick.

[EXHAUSTFIX]

Hi Ross,

Was wondering if it would be possible to get any useful gains out of my 88' pajero 2.6 (astron 2). Was hoping for slightly better economy and possible some more power without moving the torque too far up the rev range. I'm not far from your workshop, so might be some work for you too.

Cheers,
Mick.

YOU COULD GO FOR A SMALL SET OF EXTRACTORS AND A STRAIGHT THROUGH 2" SYSTEM

YOU WILL ONLY GET ABOUT A 10 KLW GAIN BUT YOU MAY PICK UP IN TORQUE A LITTLE

ROSS

[Boopa]

Do you do custom extractors by any chance or can you supply a set of bends etc so that I can make my own?

I have a 340 hemi pumping out 700HP ( can supply dyno sheets if needed to better enhance power curve ) , the stractors are at the end of their life with a few minor pit holes appearing around mainly the second collectors.
The body type is a CL Charger by Chrysler, does not have power steering but does have a remote oil filter setup & there 's an auto in behind the motor.



Kingy

at a quick calculation in my head that is a 520klw engine a bit of a monster
i need to know if its for road use or track
you do know they are one of the hardest cars to build a good set of extractors on

Street and strip use.

It will run @ Calder on the odd occasion and will do daily driver duties occasionally too.


Yes I know how hard a good set of extractors is to get for em ..... you ought to try fitting em up


Kingy

yes i can supply all the parts you need to make them proberly better if you gave me a ring

I've done a couple of small block (340's not a Hemi dude) Mopar buildups
and found the pacemakers gave good results. I'd presume your running a 727 tranny with this, and morelikely a floor mount shifter, so clearance should be no probs with up to a twin 2.5 inchs system. They come in two port sizes, ie small for 272, 318 etc, and larger for J heads that came on the 340 and 360's, but with the hp your quoting, you must be running heavily worked larger port J or W heads? or alloy Indies? Again at that hp you'll gain a fair wack of velocity buy port matching your headers, pretty easy to do also. If your gunna custom make some, get on to the Mancini, headman, or even Moparchat.com websites, which have got freakin buckets of info from the US.
BTW, my last 318, stroked to 408, made an @ extra 40hp/35ft/lbs by switching from the shitty CRS block huggers that came with it to tuned length Pacemakers.
Post some pics of the CL man!

[EXHAUSTFIX]

I've got a few empty Milo tins lying around.

If I put one on the back of my wifes 89 Camrys exhaust, will it go faster?

yep that question makes you look about as smart as your picture

lol

[Tooheys]

Hi Ross,

Ive got a HJ47 Cruiser Ute, now im going to change the extractors over so i have the exhaust running outside the chassis rail on the passenger side and then run it into a stack on the back of the cab on the passenger side (all in 2.5in).

I have a mate with the same vehicle and he runs extractors into 2.5 inch for about 3 feet and then into 3 inch for about 4 or 5 feet exiting under the rear of the drivers door with no muffler. His exhaust is a bit too loud for me so i was considering running a resonator to quieten it a little or maybe a small straight through muffler.

I still want a good note just not the drone his has at high revs so which would you recommend or do you have another suggestion?

Cheers, Tooheys