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EXHAUST QUESTIONS ANSWERED BY AN EXHAUST TECH

General Tech Talk

Moderators: toaddog, TWISTY, V8Patrol, Moderators

Posts: 410
Joined: Thu Aug 21, 2003 8:40 am
Location: Upper Hunter Valley NSW

Post by rick130 »

G'day Ross,

could you please recommend a resonator for my Landy Defender 130 300Tdi exhaust ?
I've run it in 3" (2.5" off the turbo, OE was 60mm, then 15* cone up to 3") no mufflers and there is a resonance/drone at @ 100km/h (somewhere around 2200-2500rpm) It's just too loud (I must be getting old.... :lol: )

Is near the end of the system better? If so, a can length of only around 300mm long and 100-125mm diameter is required.
Way back when I was playing with race cars we always felt it was best to have the muffler as close to the exit as possible, any thoughts on this ?

thanks.
300Tdi Defender 130 CC
Posts: 315
Joined: Thu Jul 29, 2004 6:53 am
Location: South Australia

Post by cookie monster »

hey Ross,
great info you are giving out. top effort.
my question is :
what would be the best setup for replacing the std system on my 2.8td pajero lwb.
garret T04 turbo,13psi std boost.
not looking for loudness, but would be good to have turbo kick in a bit lower in rev range(currently about 1800rpm) and obviously more go in general.
is it best to go from turbo back ?
what kind of price should i be looking at?
do you send interstate?
cheers
neil
99 GU Patrol Wagon 4.2td
Posts: 1284
Joined: Tue Mar 22, 2005 12:31 pm
Location: forest lake BUILDING BOOTYFAB BARWORK

Post by frp88 »

EXHAUSTFIX wrote:
frp88 wrote:if got a 13bt and was thinking 3" its a factory turbo and after the bigger tube is i would like to boost it up to 12psi with inter.
if you are thinking of upgrading to 12 lb boost you are right on the mark for needing a 3" system
any where near 1 bar of boost warrents this size
i went to Toyota today to get an exhaust gasket and got a surprise its only a steel ring.I would like to do the job myself to save the coin but Iam not sure how i can go to 3" if the inner dia.off the gasket is only 2.25" could you give me your professional HELP so i can get started cos it broken off after the flex-pipe and needs to fixed thanks mike
LETS GO BRONCOS
Posts: 170
Joined: Wed Jul 06, 2005 3:45 pm
Location: Mexico... I mean uhhh, melbourne

Post by mrx78u »

G'day exhaustfix.

I've already picked your brain for info, so thanks again for that. Well... The exhaust on my 2.6 pajero swb took a bit of a hammering last weekend and has in turn developed *some* holes. Guess it probably had some rust in it. Anyway, I've decided that the best course of action is going to be fitting a new exhaust system which will sit a wee bit higher, and with any luck breathe a bit better. Anyway, the vehicle is an 88' 2.6 swb pajero (leaf sprung). Stock engine, but it's going to be getting a weber carb soon. You made a suggestion already about an appropriate system, which would give me a slight power/torque gain (small extractors and a 2" straight through system). My point is that i'd like to bring the work to your workshop and was hoping you might be able to give me rough idea of price, and if you think anything should be changed to accomodate the weber (it's a 32/36dgv sequential). Oh and i'd like to fit an EGO sensor as well.

Thanks in advance exhaustfix.

Cheers,
mick.
Last edited by mrx78u on Thu Jun 01, 2006 1:00 pm, edited 1 time in total.
88' NE Pajero SWB. 31's, flexi flares, and NOW WITH EFI!!
Posts: 314
Joined: Tue Nov 25, 2003 3:43 pm
Location: Sunny Coast

Post by BundyMonkey »

EXHAUSTFIX wrote:
BundyMonkey wrote:
EXHAUSTFIX wrote:
BundyMonkey wrote: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
What would the max size pipe you would reccomend?
Before All toys there was the Landcruiser
Posts: 266
Joined: Tue Mar 14, 2006 9:19 am
Location: MELBOURNE

Post by EXHAUSTFIX »

sudso wrote:hi Ross, I removed those perforated cone shape s/s thingy's from the Y piece in my V6 Rodeo's exhaust that reduce the diameter to about 1" and I've noticed no difference in power like others have who did it, but one thing has changed: the Check Engine Light used to come on when I ran it on LPG and go off when I ran it on petrol, since I removed the "restrictors" it does'nt come on now when I run it on LPG.

Just wondering now if those "restrictor" thingy's had something to do with the O2 sensor working correctly. The restrictors were located before the O2 sensor.
Do you know anything about it?
the internal cone may have been shaped in a way thet it was not flowwing past the oxy sencre properly
exhaust fix
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Post by EXHAUSTFIX »

rick130 wrote:G'day Ross,

could you please recommend a resonator for my Landy Defender 130 300Tdi exhaust ?
I've run it in 3" (2.5" off the turbo, OE was 60mm, then 15* cone up to 3") no mufflers and there is a resonance/drone at @ 100km/h (somewhere around 2200-2500rpm) It's just too loud (I must be getting old.... :lol: )

Is near the end of the system better? If so, a can length of only around 300mm long and 100-125mm diameter is required.
Way back when I was playing with race cars we always felt it was best to have the muffler as close to the exit as possible, any thoughts on this ?

thanks.
berklee resonator (be0346)
exhaust fix
14 windsor rd croydon vic
ph 0397229766

NO MUFF TOO TUFF
Posts: 266
Joined: Tue Mar 14, 2006 9:19 am
Location: MELBOURNE

Post by EXHAUSTFIX »

mrx78u wrote:G'day exhaustfix.

I've already picked your brain for info, so thanks again for that. Well... The exhaust on my 2.6 pajero swb took a bit of a hammering last weekend and has in turn developed *some* holes. Guess it probably had some rust in it. Anyway, I've decided that the best course of action is going to be fitting a new exhaust system which will sit a wee bit higher, and with any luck breathe a bit better. Anyway, the vehicle is an 88' 2.6 swb pajero (leaf sprung). Stock engine, but it's going to be getting a weber carb soon. You made a suggestion already about an appropriate system, which would give me a slight power/torque gain (small extractors and a 2" straight through system). My point is that i'd like to bring the work to your workshop and was hoping you might be able to give me rough idea of price, and if you think anything should be changed to accomodate the weber (it's a 32/36dgv sequential). Oh and i'd like to fit an EGO sensor as well.

Thanks in advance exhaustfix.

i would sujest a set of small size extractors ans a 2" straight through system

aprox $500

Cheers,
mick.
exhaust fix
14 windsor rd croydon vic
ph 0397229766

NO MUFF TOO TUFF
Posts: 266
Joined: Tue Mar 14, 2006 9:19 am
Location: MELBOURNE

Post by EXHAUSTFIX »

cookie monster wrote:hey Ross,
great info you are giving out. top effort.
my question is :
what would be the best setup for replacing the std system on my 2.8td pajero lwb.
garret T04 turbo,13psi std boost.
not looking for loudness, but would be good to have turbo kick in a bit lower in rev range(currently about 1800rpm) and obviously more go in general.
is it best to go from turbo back ?
what kind of price should i be looking at?
do you send interstate?
cheers
neil
a new exhaust wont make yor power come in earlier as this is controlled by the size of your turbo
but it will make your turbo spool up quicker
and give you power gain
sorry i only work in melbourne not up to the stage of jogging systems just yet
exhaust fix
14 windsor rd croydon vic
ph 0397229766

NO MUFF TOO TUFF
Posts: 170
Joined: Wed Jul 06, 2005 3:45 pm
Location: Mexico... I mean uhhh, melbourne

Post by mrx78u »

Sounds ok, i'll give you a call when I get payed
EXHAUSTFIX wrote:
mrx78u wrote:G'day exhaustfix.

I've already picked your brain for info, so thanks again for that. Well... The exhaust on my 2.6 pajero swb took a bit of a hammering last weekend and has in turn developed *some* holes. Guess it probably had some rust in it. Anyway, I've decided that the best course of action is going to be fitting a new exhaust system which will sit a wee bit higher, and with any luck breathe a bit better. Anyway, the vehicle is an 88' 2.6 swb pajero (leaf sprung). Stock engine, but it's going to be getting a weber carb soon. You made a suggestion already about an appropriate system, which would give me a slight power/torque gain (small extractors and a 2" straight through system). My point is that i'd like to bring the work to your workshop and was hoping you might be able to give me rough idea of price, and if you think anything should be changed to accomodate the weber (it's a 32/36dgv sequential). Oh and i'd like to fit an EGO sensor as well.

Thanks in advance exhaustfix.

i would sujest a set of small size extractors ans a 2" straight through system

aprox $500

Cheers,
mick.
88' NE Pajero SWB. 31's, flexi flares, and NOW WITH EFI!!
Posts: 410
Joined: Thu Aug 21, 2003 8:40 am
Location: Upper Hunter Valley NSW

Post by rick130 »

Thanks very much for your response Ross, very much appreciated. :D
300Tdi Defender 130 CC
Posts: 315
Joined: Thu Jul 29, 2004 6:53 am
Location: South Australia

Post by cookie monster »

EXHAUSTFIX wrote:
cookie monster wrote:hey Ross,
great info you are giving out. top effort.
my question is :
what would be the best setup for replacing the std system on my 2.8td pajero lwb.
garret T04 turbo,13psi std boost.
not looking for loudness, but would be good to have turbo kick in a bit lower in rev range(currently about 1800rpm) and obviously more go in general.
is it best to go from turbo back ?
what kind of price should i be looking at?
do you send interstate?
cheers
neil
a new exhaust wont make yor power come in earlier as this is controlled by the size of your turbo
but it will make your turbo spool up quicker
and give you power gain
sorry i only work in melbourne not up to the stage of jogging systems just yet
cheers Ross,
so what would be the best size, 2.5" or 3". single muffler or stick with the two muffler setup ?
cheers
neil
99 GU Patrol Wagon 4.2td
Posts: 266
Joined: Tue Mar 14, 2006 9:19 am
Location: MELBOURNE

Post by EXHAUSTFIX »

cookie monster wrote:
EXHAUSTFIX wrote:
cookie monster wrote:hey Ross,
great info you are giving out. top effort.
my question is :
what would be the best setup for replacing the std system on my 2.8td pajero lwb.
garret T04 turbo,13psi std boost.
not looking for loudness, but would be good to have turbo kick in a bit lower in rev range(currently about 1800rpm) and obviously more go in general.
is it best to go from turbo back ?
what kind of price should i be looking at?
do you send interstate?
cheers
neil
a new exhaust wont make yor power come in earlier as this is controlled by the size of your turbo
but it will make your turbo spool up quicker
and give you power gain
sorry i only work in melbourne not up to the stage of jogging systems just yet
cheers Ross,
so what would be the best size, 2.5" or 3". single muffler or stick with the two muffler setup ?
cheers
neil
thats almost one bar of boost so i wouls say it would need 3 "
you could get away with i large straight through muffler
something like 11"x6"x18'long
you can get these from most suppliers
exhaust fix
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Post by BundyMonkey »

Hi Ross thanks for the response earlier.

If I went to a straight through system on my 2.4 Bundy running 10-12psi of boost what size would you reccomend?

Thanks
Before All toys there was the Landcruiser
Posts: 266
Joined: Tue Mar 14, 2006 9:19 am
Location: MELBOURNE

Post by EXHAUSTFIX »

BundyMonkey wrote:Hi Ross thanks for the response earlier.

If I went to a straight through system on my 2.4 Bundy running 10-12psi of boost what size would you reccomend?

Thanks
3" SYSTEM WITH BIG STRAUGHT THROUGH MUFFLERS
exhaust fix
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hi

Post by siklux »

gday Ross. my names mitch. im Shaun and peter Wyss's brohter in law to be.I live in croydon and have frequented Exhaust fix over the years with many a cars back all the way when Ron Black i think owned it. anyways I have a TD4.2 which i just brought a turbo kit for but it didnt come with an exhaust manifold. are you able to make one up for it?? cheers
Posts: 108
Joined: Mon Oct 17, 2005 10:32 am
Location: Flinders Rangers - South Australia

Hi there

Post by ellard »

I have a question for the Exhaust tech:

I have a BJ73 - which is now fitted with a 2h diesel. I am trying to get the best ability from the engine (power & economy) what do you recomend regarding the exhaust system.

Many thanks

Wayne
Posts: 2601
Joined: Tue Jul 13, 2004 8:02 pm
Location: warner, brisbane

Post by chunderlicious »

twin turbo VN motor :twisted: , custom cam (match turbo) and slightly ported heads etc. to match turbo flow. the valve springs have been upgraded to prevent valve bounce etc. would twin 2.5 inch with 2 90 degree bends (dump and front pipe) be enough flow or should i try for 3?

also standard VS commo ute with pacemakers, dont wanna run cats and only small mufflers, should i run twin 2 inch pipes over the diff out the back or would dumping before the diff be ok? valve springs havent been modded and wont be for a while. still want the low down torque for fun off the line.

cheers

Evan
turbos are nice but i'd rather be blown
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Re: hi

Post by EXHAUSTFIX »

siklux wrote:gday Ross. my names mitch. im Shaun and peter Wyss's brohter in law to be.I live in croydon and have frequented Exhaust fix over the years with many a cars back all the way when Ron Black i think owned it. anyways I have a TD4.2 which i just brought a turbo kit for but it didnt come with an exhaust manifold. are you able to make one up for it?? cheers
hi mitch
yes no problem before you fit the turbo get a plate cut to fit the exhaust outlet in 12mm

you can get this done at knox steel profiles barry st bayswater

cheers ross
exhaust fix
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Re: Hi there

Post by EXHAUSTFIX »

ellard wrote:I have a question for the Exhaust tech:

I have a BJ73 - which is now fitted with a 2h diesel. I am trying to get the best ability from the engine (power & economy) what do you recomend regarding the exhaust system.

Many thanks

Wayne
hi wayne

if you are running somewere about 7lb boost 2,5" if you are up around 10-14 lb boost
3" straight through muffler
exhaust fix
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Post by EXHAUSTFIX »

chunderlicious wrote:twin turbo VN motor :twisted: , custom cam (match turbo) and slightly ported heads etc. to match turbo flow. the valve springs have been upgraded to prevent valve bounce etc. would twin 2.5 inch with 2 90 degree bends (dump and front pipe) be enough flow or should i try for 3?

also standard VS commo ute with pacemakers, dont wanna run cats and only small mufflers, should i run twin 2 inch pipes over the diff out the back or would dumping before the diff be ok? valve springs havent been modded and wont be for a while. still want the low down torque for fun off the line.

cheers

Evan
with the vn it depends on what boost and what outlet size is at the back of your turbo small boost 2.5" larger boost 3"

if yu want torque dont remove cats run tails out back to get torque you need a small amount of restriction which you get with cats and the correct pipe sixe

the right way for this is running twin cats and runnig a system like a vt v8 in 2" straight mufflers
exhaust fix
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Post by Heath.Davis »

Hey Doc,

I've just recently bought a 97 2.2 petrol ford courier ute (for towing the zook). It currently has the factory exhaust.

Is there anything I can do to this system to make better use of the limited power and torque of this little engine. I will be fitting a more free flowing air filter as well but am unsure of the out side of the engine.

Cheers for any help.

Heath (NZ)
Heath
Starting again with a vitara trials truck
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Post by EXHAUSTFIX »

Heath.Davis wrote:Hey Doc,

I've just recently bought a 97 2.2 petrol ford courier ute (for towing the zook). It currently has the factory exhaust.

Is there anything I can do to this system to make better use of the limited power and torque of this little engine. I will be fitting a more free flowing air filter as well but am unsure of the out side of the engine.

Cheers for any help.

Heath (NZ)
a set of extractors but only small pipe sezes and a straight through muffler dont change the size of the exhaust this will help keep torque
exhaust fix
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Post by FourSpin »

I got a powerhouse 3.4L 4cyl 3B diesel in my BJ73, much later down the track this will be replaced by an as yet un-named motor...BUT...in the meantime I was wanting to get a little bit more punch...any suggestions...it just has stock exhaust at the moment...any ideas?
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Post by Heath.Davis »

Thanks for the info.

Confirmed what I though about sizes so now when I go in for the work I can talk the proper talk.

Heath
Heath
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Post by EXHAUSTFIX »

FourSpin wrote:I got a powerhouse 3.4L 4cyl 3B diesel in my BJ73, much later down the track this will be replaced by an as yet un-named motor...BUT...in the meantime I was wanting to get a little bit more punch...any suggestions...it just has stock exhaust at the moment...any ideas?
hi
3b is never going to be a power house but you can improve it a little
all diesel engines work well with no back pressure
i would add a set of extractors and a 2.25" straight through exhaust on this car
exhaust fix
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Post by fishaholic »

Ross,
I have an 02 Rodeo with the 3.2L V6, just wondering what are your thoughts on the best set up for for increased horspower and torque and also make the nice engine note a touch louder :cool: :lol:

Would running a 2.5" inch from the cat back improve this or would extractors need to fitted as well? :?

Andrew
52 weekends are not enough!
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Post by EXHAUSTFIX »

fishaholic wrote:Ross,
I have an 02 Rodeo with the 3.2L V6, just wondering what are your thoughts on the best set up for for increased horspower and torque and also make the nice engine note a touch louder :cool: :lol:

Would running a 2.5" inch from the cat back improve this or would extractors need to fitted as well? :?

Andrew
both extractors and system will give increase but you dont have to do it all at once
i sugest do the system first and see if your happy with that before you put extractors on it
exhaust fix
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Post by TX Lux »

Hello Exhaustfix

What would be the best zorst for turbo(CT20) 2.8 hilux??
Iam after low down torque. Size ,muffler, no muffler etc

Thanks
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Post by EXHAUSTFIX »

TX Lux wrote:Hello Exhaustfix

What would be the best zorst for turbo(CT20) 2.8 hilux??
Iam after low down torque. Size ,muffler, no muffler etc

Thanks
a ct20 is only small so i would only go up to 2.5" max and beeing petrol you will need a straight through muffler
exhaust fix
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