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  #1  
Old 07-17-2003, 03:46 PM
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Join Date: May 2003
Location: bullhead city, az hot as hell
Posts: 301
hipo air intake

ther is aguy on e-bay selling a hiperformance intake setup for 190's and 300e anyone checked out his claims on performance and milage over the stock air cleaner
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  #2  
Old 07-17-2003, 04:56 PM
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MTI MTI is offline
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Unless and until somebody does a before and after dyno, it's going to be uncertain how much benefit (if any) the intake provides. I have to admit that I replaced my stock 190E air cleaner with a rubber elbow/tube/K&N cone filter and noticed a few things right away: 1) My MPG remained the same; 2) the engine is more audible now since the stock air cleaner is a great sound damper; and 3) there is a slight increase in throttle response, but nothing to write home (or here) about.
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  #3  
Old 07-17-2003, 06:00 PM
Jackd
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The last post nicely recap the usefullness of an after market air intake system. Except for the added noise, no perceptible other benefits.
A nice conversation piece is all it is.
jackd
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  #4  
Old 07-21-2003, 01:18 AM
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Does your car run at a cooler temperature? The older mercedes tend to overheat while sitting in traffic and I was hoping a higher flow air intake would help cool the engine down during longs periods of idling on hot days. I dont really care about horsepower and a little extra noise or MPG increases. If I wanted all those Id get a supercharger.
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89 300E Pearl Grey Metallic
7 Spoke 16" staggered wheels (SLK)
215/55/16 Hankook Ventus HRII H405 tires
Euro Headlights
Smoked Corners
Smoked red/clear tail lights

1987 300e Black Metallic (mom's car)
8 hole 15" wheels (C Class)
Clear Corners
Red/Smoked tail lights
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  #5  
Old 07-21-2003, 03:22 AM
azhari
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A higher flow air intake does not cool an engine when idle.

The fans (clutch and aux) are supposed to achieve cooling of the engine.

A higher flow intake (or cold air intake) provides for more cool air to be channelled INTO the engine itself to improve the combustion process, hence improving efficiency.

The purpose of the intake is not to cool or lower the engine running temps.

Cheers.
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  #6  
Old 07-21-2003, 01:11 PM
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But wouldnt a less restrictive filter supply more air to the engine during the idle process? It seems like the air flow gets cut off when not at speed and the fans arent strogn enough until about 2000 rpm and I really dont want to have to shift into nuetral and rev the engine to cool it.
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89 300E Pearl Grey Metallic
7 Spoke 16" staggered wheels (SLK)
215/55/16 Hankook Ventus HRII H405 tires
Euro Headlights
Smoked Corners
Smoked red/clear tail lights

1987 300e Black Metallic (mom's car)
8 hole 15" wheels (C Class)
Clear Corners
Red/Smoked tail lights
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  #7  
Old 07-21-2003, 02:02 PM
azhari
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Yes, at idle the airflow gets cut off, and this affects the airflow that cools the radiator at higher speeds.

When the cooling system is inefficient (a lot of factors - coolant flow, coolant/antifreeze mix, faulty fan switches,etc), this results in your running temp going up.

When you talk about shifting to neutral and revving it, this refers to the clutch fan.

Doesn't your aux fan also cut in when the temps go up?

The proper operation of these 2 fans, coupled with an efficient cooling system should keep your running temps around 100 deg, at most, even in a jam.

As an example, my kid brother's 190e (same model as mine but 1990) was stuck in a 2 hour jam returning from a F1 race.

He monitored his running temp at no higher than 95 at all times, with both fans cutting in and out with the temperature changes.

The outside temperature was 34 deg Celcius!Go figure!

Have you serviced your cooling system recently?You know the drill - flushing, test temp switches, check thermostat, etc.

Cheers.
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  #8  
Old 07-21-2003, 02:57 PM
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Posts: 131
I had a major service done about 6 or 7 months ago so all that was done. I have not noticed the AUX fan switching on which could be my problem. When I sit in a jam and the temp is above 80 F it will sometimes run up to 110 C. The revving while in nuetral gets the main fan to spin fast enough to force air into the intake snorkel and keep the engine cool. I will check on the aux fan later today to see if that is my problem. Also, would an intercooler help the car run cooler even if I dont have a turbo on it?
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89 300E Pearl Grey Metallic
7 Spoke 16" staggered wheels (SLK)
215/55/16 Hankook Ventus HRII H405 tires
Euro Headlights
Smoked Corners
Smoked red/clear tail lights

1987 300e Black Metallic (mom's car)
8 hole 15" wheels (C Class)
Clear Corners
Red/Smoked tail lights
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  #9  
Old 07-21-2003, 05:15 PM
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Location: Southern California
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I think most vintage Merc owners can resist joining the "filter on a stick crowd", but maybe not all.

Visual inspection clearly shows that the cold air inlet systems on these cars are efficient and not fundamentally restrictive.

K&N filtration efficiency is highly sensitive to the amount of oil they contain. Too little and they hardly filter at all. Too much and they can gum up the air flow valve or MAF sensor. The OEM Bosch cellulose air filter element has lots of area, excellent filtration efficiency, and very little pressure loss. K&N filters are beat by about as many paper filters as paper filters they beat, and the very small differences aren't enough to make a signficant difference in actual engine power output. Where talking about a couple inches of water depression difference in most cases.

When people wax eloquently about the "washability" of K&N filters I ask why not wash out your old oil filter in solvent and put it back on. It's the same convoluted logic!!!

Duke
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  #10  
Old 07-21-2003, 05:49 PM
Jackd
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''The revving while in neutral gets the main fan to spin fast enough to force air into the intake snorkel and keep the engine cool.'' Not quite true.
At fast idle or higher RPM, the fan does not force more air into the intake snorkel. It forces more air through the radiator, thus the better cooling. Whatever the size, make or model of air filter you install, none will drop your temperature by one single degree. Even removing the air filter completely will not bring any change.
An inter-cooler will not help solve your problem neither. It is not designed to correct a cooling system problem.
Your rad. cooling problem has nothing to do with air intake and will not be solved by spending whatever amount of money you wish on your intake system.
1) is your radiator clean, in perfect/unclogged condition?
2) All fans working as they should?
3) Is the expansion tank cap holding the prescribed pressure?
4) Is your water pump pumping as it should?
5) Is the serpentine belt tight, not slipping on the water pump pulley?
6) You have the right mix of anti-freeze/water?
7) Is you thermostat opening completely?
8) Any collapsed hoses?
JackD
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  #11  
Old 07-21-2003, 06:10 PM
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Like I said before, I have not once heard or seen the AUX fan operate so I think that is my problem. All hoses look fine and all belts were tightened or changed roughly 6 months ago durign a major service by an MB tech. Ill try to figure out why the fan isnt working.

I know it is supposed to turn on at a certain temp but what controls that function? Could it be that the fan is fine but isnt being told to turn on? What should I check to make sure the fan is functioning properly?

Thanks.
__________________
89 300E Pearl Grey Metallic
7 Spoke 16" staggered wheels (SLK)
215/55/16 Hankook Ventus HRII H405 tires
Euro Headlights
Smoked Corners
Smoked red/clear tail lights

1987 300e Black Metallic (mom's car)
8 hole 15" wheels (C Class)
Clear Corners
Red/Smoked tail lights
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  #12  
Old 07-21-2003, 06:24 PM
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Join Date: Jul 2001
Posts: 613
If you look at the stock intake setup, it is indeed a cold air/ram air design. This type of aftermarket air filter system (as in the ebay ad) is actually going to cause you to loose hp, not gain it. A open element air filter in our hot engine compartment is going to ingest hot air and very little cold air.

A heat shield on the filter would help but you really need to channel cold air from the grill or bumper area directly into the end of a shielded air filter.
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  #13  
Old 07-21-2003, 11:21 PM
azhari
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Aux fan on a 190e is turned on by either one of these two (ie both switches are connected to 1 fan, either on can turn on the fan if conditions are met - high temp or high pressure) :

Aux fan temp switch
Aircon high pressure switch (on the receiver dryer)

I have 2 aux fans in my 190e (Euro) so the temp switch turns one on and the high pressure switch turns the other one on.

Cheers.
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  #14  
Old 07-22-2003, 12:53 AM
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Posts: 131
What if its just a single fan like my 300e? Also, is removal easy? My mom has an 87 300e and I want to try to at least hook hers up to see if it runs and see if the fan is my problem before spending $150+ on a new or used one. Also, would the resistor have anything to do with it not working? How can I check that? I looked at it an there is a vertical crack on the side and the whole thing looks dried out and old so I was hoping that was the problem since that saves $100 or more.
Thanks.
__________________
89 300E Pearl Grey Metallic
7 Spoke 16" staggered wheels (SLK)
215/55/16 Hankook Ventus HRII H405 tires
Euro Headlights
Smoked Corners
Smoked red/clear tail lights

1987 300e Black Metallic (mom's car)
8 hole 15" wheels (C Class)
Clear Corners
Red/Smoked tail lights
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  #15  
Old 07-22-2003, 01:06 AM
azhari
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Before you pull out the aux fan, trace the wires from the fan.

It should go to a 2 pin connector.

Pull the connector out.

Apply 12V to 1 pin and -ve to the other pin (on the wires going to the fan).

If the fan spins, then it's ok.

Polarity doesn't matter coz the fan will spin either way depending on which pin you apply 12V.

Try this first.

Cheers.
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