home made spiral air intake - PeachParts Mercedes-Benz Forum

JUNAID786 · #1 10-17-2011, 02:51 AM

Hey guys

Im so thrilled with the result I have gotten with my home made intake that I had to post this up here.

Firstly, its 100mm inlet that’s twice the size of the stock 50mm. I heat shielded the inlet with ssn coupling.

I used a heater hose for the crankcase breather system. Drilled a small hole in for the vacuum line of the fuel pressure regulator.

I draped a piece of cloth folded twice over the airflow meter and the clamp of the pvc flex pipe holds it in place

Ok, so there has been much debate on the benefit of those spiral intake jobbies.

Well I know for a fact that spiral air intake works coz my previous Mercedes 190e had a spiral shaped intake tract.

Those aftermarket ones have been known to be a restriction. So I cured that by not placing it in the intake path but rather giving it a separate intake path.

So the total intake are is closer to 150mm. and the spiral effect works like a small supercharger( at highway speeds) I have also noticed that I require much less foot on the throttle to get the car up to speed and to maintain speeds. This was all great when the engine was cold and the mixture was rich.

But with the engine properly warmed up, the car was pinging like crazy from a lean mixture. 1/8 turn on the fuel distributor and still going lean at high rpm. Turned it another 1/8 turn and have yet to test it.

Parts used
- 110mm flex pipe( pvc plumbing type)
- Black duct tape
- Simota spiral intake
- Ssn coupling with 2 clamps(127mm)
- Heater hose
- Multi purpose cloth

The entire job cost me about R 300( $42)

400Eric · #2 10-17-2011, 04:02 AM

Your benefit came from going from 50mm to 100mm. I really don't think that spiral thing on the side is helping you other than the possibility that the additional 50mm of opening is helping, in which case I would just have a 150mm opening towards the front of the engine bay drawing air from in front of the radiator, not from behind it.
Regards, Eric

oldsinner111 · #3 10-17-2011, 08:19 AM

what type of filtration you use.Your turbine looking thing,a Tornado?

JayRash · #4 10-17-2011, 12:40 PM

i think u should filter that ASP trust me. as for the spiral thing IMHO it will only disrupt the flow and slow down ur air speed.

oldsinner111 · #5 10-17-2011, 12:48 PM

At least I use K an N with million mile warrenty.

MAG58 · #6 10-17-2011, 12:58 PM

Quote:

Originally Posted by JUNAID786

Ok, so there has been much debate on the benefit of those spiral intake jobbies.

Well I know for a fact that spiral air intake works coz my previous Mercedes 190e had a spiral shaped intake tract.

Those aftermarket ones have been known to be a restriction. So I cured that by not placing it in the intake path but rather giving it a separate intake path.
]

Care to explain the scientific reasoning to this one?

JayRash · #7 10-17-2011, 04:44 PM

my w124 4matic has some sort of fixed fan in the intake duct from factory. its there to enhance low rpm flow to give slightly better response or torque but it will hurt the topend no doubt. Merc in its 2006 v6 has a simillar vane setup that retracts on hi high rpm to retain topend flow rates. thus it sure helps low air speed but hurts high air speeds.

JUNAID786 · #8 10-18-2011, 12:24 PM

i have since modified it further. I bought 2 more sizes. Small and large. So its like a 3 stage thingy. I wouldnt be able 2 explain it in scientific terms but damn it sounds and feels great. Im using cloth with some oil soaked in it. Folded twice and draped over airflow meter. The clamp holds it secure. Sure its not as good as a turbo or supercharger. It probably only yielded a small gain. Maybe as much as a set of longer duration cams. Definately more than the stock intake and definately more than an aftermarket cold air intake so im happy.

TheDon · #9 10-18-2011, 12:54 PM

I would stick the OEM intake back on. It was designed the way it was for a reason. Your dryer vent and tornado thing are not doing anything for you.

oldsinner111 · #10 10-18-2011, 01:45 PM

OEM intakes are modest.Remember these cars are tuned for the everyday driver.The fuel map to get good mileage and emissions.
I like his dryer vent approach,at least the guy is breaking free from the acceptance crowd.
I was just lucky to have funds to build my cold air intake.

JMURiz · #11 10-18-2011, 03:30 PM

A Velocity stack with an intake in a high-pressure and cool air location is the only real improvement for an intake.

Having a semi-smooth tract works as well...not totally smooth, as you want some air tumble.
A finish like this works best, did this on my Audi and it works great:
http://forums.audiworld.com/picture.php?albumid=87884&pictureid=101311
before (on left) & after (on right):

after with velocity stack:

Look at what they use in F1 racing...they user every trick that works.

PS: if you look at how much material those spiral/tornado things take up, you can see how much flow is actually being restricted.

lsmalley · #12 10-19-2011, 12:19 AM

I'm guessing a double wrapped oil soaked cloth probably isn't such a great idea seeing that the oil would attract more dust than the dry and muck on the cloth quickly, thus restricting further....at least to me this seems like it would happen.

400Eric · #13 10-19-2011, 01:14 AM

Also, the amount of exposed "filter" area is too small. That hurts flow and it's also one more reason why it will plug up quickly.

Oldsinner, why don't you post some more photos of your set-up for Junaid to view.
Regards, Eric

JUNAID786 · #14 10-19-2011, 04:15 AM

Yes, funds are tight. times are hard and friends are few.

almost all cotton guaze filters are oil impregnated, this improves the filtration rate. the filter does get clogged like all filters and needs to be changed regularly. like all filters.

nice info on the velocity stack. where would you place that?

value all your input guys

whunter · #15 10-19-2011, 04:49 AM

Quote:

Originally Posted by JUNAID786

Hey guys

Im so thrilled with the result I have gotten with my home made intake that I had to post this up here.

Firstly, its 100mm inlet that’s twice the size of the stock 50mm. I heat shielded the inlet with ssn coupling.

I used a heater hose for the crankcase breather system. Drilled a small hole in for the vacuum line of the fuel pressure regulator.

I draped a piece of cloth folded twice over the airflow meter and the clamp of the pvc flex pipe holds it in place

Ok, so there has been much debate on the benefit of those spiral intake jobbies.

Well I know for a fact that spiral air intake works coz my previous Mercedes 190e had a spiral shaped intake tract.

Those aftermarket ones have been known to be a restriction. So I cured that by not placing it in the intake path but rather giving it a separate intake path.

So the total intake are is closer to 150mm. and the spiral effect works like a small supercharger( at highway speeds) I have also noticed that I require much less foot on the throttle to get the car up to speed and to maintain speeds. This was all great when the engine was cold and the mixture was rich.

But with the engine properly warmed up, the car was pinging like crazy from a lean mixture. 1/8 turn on the fuel distributor and still going lean at high rpm. Turned it another 1/8 turn and have yet to test it.

Parts used
- 110mm flex pipe( pvc plumbing type)
- Black duct tape
- Simota spiral intake
- Ssn coupling with 2 clamps(127mm)
- Heater hose
- Multi purpose cloth

The entire job cost me about R 300( $42)

The product claims are scientifically verified as totally fraudulent.
False, fake, fraud, bad science, and worse engineering.
Products like this are sold to people who are gullible, and naive.
Bogus Fuel-Saving Device Sellers diesel/gasoline - PeachParts Mercedes ShopForum

You are simply changing the sound of your intake, which is OK if that makes you happy.
I have altered intake systems many times, (tuned them) to get a pleasant tone or eliminate an irritating frequency.

Your oil soaked rag filter is a terrible idea.
The oil particles will damage the mass airflow meter, same as the K&N filter.
K&N filter topic links thread - PeachParts Mercedes ShopForum

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