3inch Mandrel exhaust worth the money
- Thread starter shaunx
- Start date
centaur
Member
That depends on the engine as fitted, and its intended purpose!!!!! You will need to be clearer on its use and modifications.
If it is going to be used on a public road, then a muffler is needed for the vehicle to be roadworthy... Most vehicles have to be under a 96Db noise limit, without a muffler, this is NOT possible.
A muffler will also aid in backpressue which a standard/slightly modified engine needs to operate efficiently. No backpressure, and you will lose power and waste fuel.If the engine has been highy modified and will only be used for competition and NOT on public roads, then a muffler is not needed.
This reduces backpressure, which modified engines have been designed to run without. This will only work with a large overlap cam, highy modified heads (port matching, bowl enlarging, etc), high compression and a free flowing exhaust.Determine what you want to do with the vehicle, wheter road use or competition, then seek advice.
cam_champion
New Member
the requirement for at least one muffler on a vehicle is actually there as a spark arrestor. but there is also the noise (dB) limit that also requires the use of some form of silencing.
On a turbo diesel car, the turbo is actually sufficient for use as the spark arrester and sometimes as a silencer. So provided you are below the noise limit, you can get away with a straight through system
as centaur posted.............what engine in what vehicle?
centaur
Member
That point is correct, to a point. A Turbo will arrest sparks, and will help a little bit in regards to noise, but normally not enough. For a vehicle to be roadworthy, it must be fitted with at least one silencer (Muffler).
If a vehicle has no muffler, and just s straight through system, you can get elevated noise levels through "Pipe Noise". A lot of V8 drivers used to put their mufflers right up front of the vehicle so the mufflers would silence the noise, but then the "Pipe Noise" effect would amplify it again, me included...
Which is why most oem manufacturers have a silencer near the back of the car, to ensure the "Pipe Noise" is reduced. But, once again, it depends on its intended use, and if it will be on the road. It will be safer to have one, trying to argue that point with a copper on the side of the road,
or the RTA is just not worth it....
Mavman89
New Member
my mate has a nice mq patrol turbo deisel with high flow turbo straight threw exhaust and it sounds terriffic and has heaps of go sounds just like a truck.. but it isnt louder than 96 db with out having the muffler.. if u want a crisp and powerfull note go buy a hotdog and use that i have one on my speedway car it work the same as a mufler but has less restriction will still sound tuff but will be under the 96 db mark. proven and my car only has a exhaust to half way. buy a sports hot dog it should do the trick intended.
laterz Josh
laterz Josh
Mavman89
New Member
hey mate the 4.2 do get better power and fuel economy with extractors and a decent exhaust. 3 inch may be a bit of overkill as it will be way to loud and prolly to big id go 2 and a half inch. the exhaust should give better fuel economy i know the extractors make it better. id invest in a hyclone they really do work you will get more power and better fuel economy and combine that with the exhaust it should make it a fair bit better
Laterz Josh
Laterz Josh
0
001525
Guest
Are you serious? Hiclone work? These gadgets have been tested around the world by engineers and scientists alike and have been proven not to offer any benefits at all. The only purpose they serve is to put money into the inventor's pocket.
I hope you didn't spend $135 or so to buy one? Hiclones, turbonators and all the other dozens of clones now on the market are duds. I nearly bought one a couple of years ago and found a lot of independent test results. I'm glad I didn't part with my money.
Pure Yobbo
Moderator
Hi Guys,
Just had ours done about 2 weeks ago. 3" Mandrell Bent. We think we gained about 10hp at the rear wheels by doing it. Also dropped it on the dyno. Went from 108hp at the rear wheels to 135.6hp at the wheels running 14 PSI boost.
Pulls heaps better and they would the mixture down a little so they tell me we will get better fuel with an extra 30% power. Have only run 1 tank throught it so I don't have any decent fuel fiqures yet.
This is the second one we have done. The old ute 4.2 Intercooled never went on the dyno but was still tweaked. Same result heaps more guts better fuel providing you didn't get into it. The ute was 3" no Muffler sounded awsome - I really miss it.
Cheers
Just had ours done about 2 weeks ago. 3" Mandrell Bent. We think we gained about 10hp at the rear wheels by doing it. Also dropped it on the dyno. Went from 108hp at the rear wheels to 135.6hp at the wheels running 14 PSI boost.
Pulls heaps better and they would the mixture down a little so they tell me we will get better fuel with an extra 30% power. Have only run 1 tank throught it so I don't have any decent fuel fiqures yet.
This is the second one we have done. The old ute 4.2 Intercooled never went on the dyno but was still tweaked. Same result heaps more guts better fuel providing you didn't get into it. The ute was 3" no Muffler sounded awsome - I really miss it.
Cheers
joebejeckel
New Member
Exhaust Upgrade?
I have a 2008 Holden rodeo dual cab 4x4 turbo diesel, was wondering if fitting an after market exhaust would free up some torque/power? .. any ideas ,, any body had work done and able to recommend a fitter?
cheers..
Joe
I have a 2008 Holden rodeo dual cab 4x4 turbo diesel, was wondering if fitting an after market exhaust would free up some torque/power? .. any ideas ,, any body had work done and able to recommend a fitter?
cheers..
Joe
frosty
4x4 Earth Contributer
Definently!! If you want to spend lots, get a 2.5 in. mandrel bent system. Although an ordinary 2.5 system will make almost the same on a small engine. Because it is turbo charged, you can get away with no muffler. This is the biggest benefit, although it will sound like a Kenworth and if the missus drives it, she may object. If you must fit a muffler, get something thats flows well. For an even better effect, if you don't already have one, put a snorkel on it.
Pure Yobbo
Moderator
Hi Mate,
Look up TNT Exhausts at Deception Bay - he done our exhaust on our current wagon and it flows a treat. Other benifit is he won't try and rip you off. We put a muffler on this one to try and keep it semi quite and it works great.
Getting the restrictions out of the exhaust will make it go heeps better and will probably help with fuel. As Frosty said get a Snorkell as well - force the cool air into it - and to top it off through it on the Dyno and get it tuned.
Cheers
Look up TNT Exhausts at Deception Bay - he done our exhaust on our current wagon and it flows a treat. Other benifit is he won't try and rip you off. We put a muffler on this one to try and keep it semi quite and it works great.
Getting the restrictions out of the exhaust will make it go heeps better and will probably help with fuel. As Frosty said get a Snorkell as well - force the cool air into it - and to top it off through it on the Dyno and get it tuned.
Cheers
joebejeckel
New Member
beaudesert exhaust will run from turbo to tail for $935 2 3/4 inch straight through muffler extra for fitting...... no cat...is it a legal requirement to have a cat fitted to a diesel if it is fitted with one as standard?
joe
joe
joebejeckel
New Member
2 1/2 or 3" would be excellent, back pressure, ????? if your trying to get air/exhaust out of an engine why would you restrict it with back pressure, back pressure is the enemy...
go the whole system, new dump pipe for turbos and extractors for non turbo engines
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Joe
Active Member
The bloke that I use does a brilliant job. Rowville Exhaust, Fact 1/ 12 Hitec Place in Rowville. Ph: 9764 1177. This guy is really good, he's done all the work on both of my cars and never done me wrong. just explain to him what you're trying to acheive and he works out the system for you.
TUFF IFS LUX
Active Member
I run a straight through 3" exhaust with no mufler on my 07 Hilux D4D......you get a little bit better performance, nothing earth shattering at all, but I'll gain alot of benefit once I fit an aftermarket power chip and boost her 2 pounds....
driving on ther freewar at 100km/h, with no load and you can hardly tell that its open....you can really tell when accelerating from the lights...usually at slow speeds with the throttle open more than 50% you'll get that "coomp truck" Burbble sounds that sounds great.
BUT.......I drive with a very very light throttle anywhere near police vehicles......
I do have a replacement pipe with a muffler sitting in the garage ready to bolt in incase I get pulled up and sent for an inspection.
each to their own.....
driving on ther freewar at 100km/h, with no load and you can hardly tell that its open....you can really tell when accelerating from the lights...usually at slow speeds with the throttle open more than 50% you'll get that "coomp truck" Burbble sounds that sounds great.
BUT.......I drive with a very very light throttle anywhere near police vehicles......
I do have a replacement pipe with a muffler sitting in the garage ready to bolt in incase I get pulled up and sent for an inspection.
each to their own.....