Extractors and exhaust systems

Powerzone

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Powerzone

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Hi,

We'd like to do you a custom tuned length extractor for your 4K, but at the moment we don't have the right sub-contractor to bend the pipes. However, if you can get a shop to do it, we'd be glad to supply you the specs, FOC.



EXTRACTORS
Why do we need extractors on our car engines?


The original factory-fitted exhaust manifold on your car engine allows a significant quantity of exhaust gas to remain inside each cylinder, where it will mix with the incoming fresh air-fuel charge.

When this happens, less air-fuel mixture can fill the cylinder during the intake stroke. Whatever air-fuel mixture that goes in is weakened by the remaining exhaust gas. Less air-fuel mixture due to the lower intake efficiency, and on top of that, a contaminated mixture means that the power output is markedly reduced in each power stroke. Hence, the factory fitted manifold not only reduces engine efficiency, but also limits the fuel economy of the engine by forcing the engine to work harder in order to produce the required power to propel the car.

The remaining exhaust gas also contributes to a higher engine operating temperature, thereby promoting "pinging" or pre-ignition (especially when the ignition timing is more advanced) and shortening the spark plug's life.
Another side effect of a factory-fitted manifold is that when one cylinder is on the exhaust stroke, exhaust gas pressure is exerted on the exhaust port of another cylinder. For example, it has been tested and proven that in a 4-cylinder engine when number one cylinder is expelling exhaust gas, the side effect is that the exhaust gas also produces a strong pressure at the number four cylinder's exhaust port due to reverse flow.


A well designed tuned length 4-2-1 extractor can siphon out the exhaust gas.

This means that when number four cylinder fires and goes into the exhaust stroke, its outgoing exhaust gas has to fight with the prevailing strong pressure from cylinder number one. The piston now has to act as a pump to push out the exhaust gas resulting pumping losses.

How can an extractor improve engine efficiency?

An extractor is not an ordinary piece of exhaust piping. It has to be designed based on engineering formula and produced with accuracy and details to function effectively. The design of an extractor plays an important role in determining the engine's efficiency.

Not all extractors are the same in terms of design as well as functional effectiveness. A badly designed extractor can actually reduce the power output and torque, making the car lacking in acceleration and throttle response as well as increasing fuel consumption.

To ensure effectiveness, PowerZone extractors are designed based on engineering formula. Each and every pipe is calculated for optimum length and size to produce a siphoning effect. When one cylinder is blowing out exhaust gases it produces a vacuum or siphoning effect in the exhaust port of another complementary cylinder. For example, when cylinder one is on the exhaust stroke a siphoning effect is produced in the exhaust port of cylinder four in a four-cylinder engine.

When there is siphoning effect, the piston now no longer needs to pump the exhaust gas out. Thus, the power previously used for the pumping effort is now recovered to propel the car. Furthermore, the cylinder is cleaned of all exhaust gases and hence the incoming air-fuel mixture is now purer and produces more power. Therefore, not only is there a recovery of lost power (pumping losses) but there is actually additional power from the same amount of fuel and air that goes into the engine cylinders.



PowerZone extractors are designed by using formula to get the right pipe sizes and lengths.

Another important factor that has been taken into consideration is the internal surface finish of the pipes and flanges. A smooth polished finish ensures no restriction to airflow. Other factors include bending angles, jointing, and fitting accuracy. At PowerZone all such factors are duly complied with to give maximum performance standards.
Not only can PowerZone extractors improve your engine's performance, they are also designed for maximum torque and power at lower useable engine rpm.


Next time you pick out an extractor make sure that you ask for an explanation on its design. If you cannot get a reasonable answer, be extra careful in choosing the right one. We, at PowerZone, are ever willing to provide sound explanation and detailed discussion on the design and function of extractors, and most of all, a revealing demo on what type of extractors can actually perform.

© Copyright 2005 All Rights Reserved by NS Performance Tuning Sdn Bhd.
 

sexycar

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sexycar

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hi..

thanks for your kind offer, would definitely love to have your specs
for my extractor. But all the while, who does all your customer's
custom extractor's fabrication & bendings?
 

Powerzone

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We have them specially made by our sub-contractor using our own designs, but there's a certain volume committment. So, for one off it's not possible.
 

sexycar

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oic... so for my 1.3 carb engine... what kinda setup & design would u suggest?
I drive my car everyday in the region of 2000 to 4500 rpm... still on stock
1982 exhaust system till today.. would like to change the whole exhaust
system so seeking your advice on sizing & setup... thanks a lot for feedbacks,
much appreciate it.
 

lonewolf

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For Kelisa/Kenari PZ extractor...

heard it has limited stock.

so whats the setting like?...3-2-1...what different with 3-1(hotbits)...

stainless steel???...chrome color?...

can use back the heatshield?....where does the O2 sensor located?...

whats is the length for the pipes?..
 

tks

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tks

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i think i can help out here...

its a never seen b4 (or I havent seen at least :P) 3-2-1 design for the kelisa extractor...it doesnt come with the mounts for the heatshield...they (powerzone) does have heat wrap available if you're interested though...

the o2 is located faaaaaaaar below where the 3 pipes converge...wire has to be extended.
 

et5828

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et5828

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no need extend la
i'm using back the ori wire
hmm...my extractor now already mess up my exhaust system
so noisy and don feel power gain
wanna stick back to stock exhaust liao :(
 

Powerzone

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Yes, we do. With installation the complete price is RM450.
 

Powerzone

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For Saga/Iswara/Wira 1.3/1.5 we're selling at RM410 (EFI) or RM425 (carb) with installation.
 

Powerzone

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The Powerzone extractor for Kelisa is a 3-2+1 design known as a tri-y.
The O2 sensor wire has to be extended.

et5828: We don't know why yours is not, as you said it's ori. Is it Powerzone extractor that you have? If so, please come in we'd like to see why your exhaust is not performing. After the extractor what piping and silencer do you have?

:)
 

Crash

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Crash

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Originally posted by InitialD@Feb 15 2005, 11:15
Would I need a new downpipe? Does the RM450 include the downpipe?
No, does not need downpipe as the PZ header is a tuned-lengthed primary all the way to the collector, then bullet, proceeding to the piping. No other additional costs here.

I'm not a PZ employee, just in case you are wondering! :lol:
 

Powerzone

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thanks Crash!

RM450 includes installation.
 

Powerzone

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That's right, ninja_iga. No down pipe is necessary.

For those who wants to know all PowerZone extractors are designed to fit the OEM (original) exhaust system and are professionally done with bolt/nut fittings. Installation is reversible. No messy welding that's not good for airflow (those badly welded and crooked joints! yeck!). Welding is only required for certain models, but carefully done.

Cheers! :)
 

ravis

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Dudes, sir's, brother's & sister's,What's the difference between PowerZone & Hot Bits extractor ? The price difference is alot u know.........i am going to buy one soon so need ur expert explaination. My fren bought a ayam brand extractor for only 100 something and he is satisfied with it. What can powerzone & hotbits do for me then ??
 

Powerzone

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We use aluminized steel for the following reasons:

1. Rust-resistant (same material used by OEM, including Mercs!)
2. Good thermal conductivity
3. Good sound damping properties (as opposed to stainless steel)
4. Cheaper than stainless steel and thicker guage (does not crack like s. steel)
5. Does not discolor like stainless steel or chromed pipes
6. Chromed pipes are actually plain mild steel with a low cost chrome coating (will discolor, peel off, and eventually rust)

:)
 

Powerzone

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The main difference is in the design and choice of pipe sizes and pipe lengths.
PowerZone is the only brand in Malaysia that has extractors designed from the ground up, by using formula and calculations to determine the design, and it's a tuned length extractor. PowerZone does not copy others, every design is original.
Other PowerZone features include:
1. Quality workmanship
2. Internal surfaces are cleaned and grounded to promote smooth flow
3. All extractors are designed with OEM fittings, no messy joints or welding, and installations are reversible.

That's why PowerZone costs a bit more, with proper R&D, engineering design, custom built, details on flanges and welded joints, etc. All these cost something, but no efforts spared for the benefit of you customers!

:rolleyes:
 

Powerzone

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Yes, on its own the extractor gives about 5% power improvement, provided the other parts of the exhaust have NOT been messed up!
The cat can be removed and replaced with a similar pipe size center bullet.
A straight flow bullet at the rear end is NOT good for low-mid range power and it gobbles up more fuel. Also it's too noisy (very attractive lah...to the cops!). So, keep the ori or use an S-flow box.
 

Powerzone

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So far, all our designs have similar noise levels to the original, with a little extra note, but hardly noticeable. Don't want to attract the dato's, you see. But, seriously, more power doesn't has to be more noisy (maybe in politics, but not engine tuning, :D .
 

ravis

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o.k, thanks for the info.............so that means i don't have to change anything except for the extractor only lah
 

ninja_iga

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thteh86

yes, i remember reading it somewhere nearby topic..


Powerzone,
need to organise the forums le :P
then everyone can at least read and not ask so many similar questions....
 

xin

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ya how much does it cost for a Satria1.6 4-2-1 extractor that includes installation ?
 

Powerzone

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It's RM450 with installation.
 

lonewolf

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what was the size of the xtraktor?...1.6?..

coz i m running your PZ xtrack with stock piping. there seems to be somew weird soud coming on the piping...could it be the pressure of the air flow too high for the stock piping?...
 

et5828

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Originally posted by Powerzone@Feb 15 2005, 10:25
The Powerzone extractor for Kelisa is a 3-2+1 design known as a tri-y.
The O2 sensor wire has to be extended.

et5828: We don't know why yours is not, as you said it's ori. Is it Powerzone extractor that you have? If so, please come in we'd like to see why your exhaust is not performing. After the extractor what piping and silencer do you have?

:)
i have 2 bullets and one muffler at the back
i don think my car can clock 13 sec(1 sec less)
if u were to blame my exhaust setup
what happen if its still the same after i fitted back the oem exhaust system?
do u pay back all that i spend?
is it fully guarrantee performance?
 

ninja_iga

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Edward,

in my honest opinion after seeing what i saw on your car,

i WONT BE suprised, if you were slower than stock, 0-100km/h.

there's too many things/variables in your car THAT will slow your car down.

1)driver skill
2)tyre size
3)heavy stuff in car (slows down alot)
4)wrong 'performance' parts.

etc. etc.

besides, you called Sirazul aka PowerZone and thanked him, for the service and more powerful now.
Dong also told me got difference le.

now what? :huh:
 

Powerzone

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OK, let's look at the whole thing like intelligent people. Nobody is blaming anybody here. So far, the discussion is supposed to look at the whole picture wisely.

et5828: Like we said, please come in and let's look at your complete set up.

lonewolf & tks: The pree...ing sound is there bacause the cat is removed to make way for the extractor. The cat also acts as a silencer. It occurs during sudden acceleration momentarily, so it's not too annoying. But for those who wants it to be more quiet we recommend adding a center bullet silencer with the correct pipe size.

So let's use this forum for real intelligent discussions. It is a good avenue for us to learn more of the right stuff about performance tuning. Isn't this what we want?

Anyone can say what he wishes, but what is said will tell what one knows or otherwise.
 

lonewolf

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so whats the correct piping size?..

the preeee..ng...sound not only when hard accelerate..when idling sometime happen too...sometime got kling klang kling klang sound at the bottom of the car...