Attn Rivieram002, cold air intake

[clubsport]

Steve,

The cold air intake snorkel is a Porsche part for the 993RS with fixed rear spoiler....it doesn't (as far as I know) give you any more power, but this sits the airbox air intake just under the rear spoiler which is colder than the standard under the engine cover intake.

This is a real Porsche part, the point of it is that, when the intake air gets hot this can retard the ignition timing, effectively losing a few bhp....the cold air intake keeps the intake air cool, so it will not lose you a few bhp.

To see one, go to

www.carnewal.com

>upgrades

then scroll for P93 section

click on "cold air intake"

I had one on my previous RS and was happy enough with it, dare I say it, a;ways a good talking point as many people had never heard of it! []

 

[silver7]

you buy the part direct from porsche, it is from a turbo fyi,

 

[Ben Savill]

Paul,

Is that really right about the ignition timing ? Isn't it more of a case of cooler air having a great density, therefore higher concentration of oxygen within a given volume giving better combustion.

Looking forward to being corrected [] ...... just never heard of that before.....

hope all well.

ORIGINAL: clubsport

Steve,

The cold air intake snorkel is a Porsche part for the 993RS with fixed rear spoiler....it doesn't (as far as I know) give you any more power, but this sits the airbox air intake just under the rear spoiler which is colder than the standard under the engine cover intake.

This is a real Porsche part, the point of it is that, when the intake air gets hot this can retard the ignition timing, effectively losing a few bhp....the cold air intake keeps the intake air cool, so it will not lose you a few bhp.

To see one, go to

www.carnewal.com

>upgrades

then scroll for P93 section

click on "cold air intake"

I had one on my previous RS and was happy enough with it, dare I say it, a;ways a good talking point as many people had never heard of it! []

 

[clubsport]

Ben, you could well be right,,certainly agree that denser air would help the combustion process. I was told by the independent specialist that looks after my cars engines that if the intake air temp gets to a certain temp the ignition retards slightly in the same way it would automatically adjust ever so slightly if you fitted lower octane fuel, in some ways makes sense,,,warmer less dense air would produce less of a combustive environment as would a lower octane fuel. I think this is how knock sensors work on fuel/ignition systems.

I have also read this on rennlist in the past, it is allegedly only a few bhp, which could possibly be the difference between running 95 octane and that super BP 102 octane juice.

Again only from my understanding/word of mouth rather than extensive hours of research logged in my fully equipped automotive lab, is that the snorkel can actually restrict airflow at the top end of the rev range???

The only conclusion I have is that the location of the air intake is nearer to cooler air than the regular 993 airbox and seemed to run ok on my previous car.....do not expect miracles from this piece of moulded plastic!

 

[RIVIERAM002]

Thanks Paul, never seen one of these, I shall endeavour to purchase one, looks good this U boat snorkel ![]

 

[clubsport]

Steve, despite having previously posted pics on this forum, for some reason it did not seem possible this time.

So, I have sent you an email with a pic of an engine bay with the "snorkel" fitted....hope the excitement is no too much! []

 

[RIVIERAM002]

Cheers Paul, I have actually just checked it out on my PET, the part number is 993 110 360 51, strangely it lists it as a 993 turbo
part as Julian pointed out, the carnewal price is €55.00 will check it out with wilmslow OPC next week, thanks for that.

 

[silver7]

I paid £35 I think at my dealer after some arm twisting. Mind you they have had some horrific price rises recently!

 

[Ben Savill]

Detailed as ever Paul []

If it is listed as a turbo part, then colder air charge provided by intercooler anyway.

let us know how you get on with it steve.

cheers.

 

[clubsport]

Cheers Maurice, thought it made sense...hope all is well mate.....I must get over to the "other" 993 forum more often []

 

[SimonExtreme]

Some guys on Rennlist did some tests on inlet temps to see if it was worth playing with cold air boxes and/or snorkels. If the car is moving, they were unable to measure any difference between inlet temps with different types of air intakes. the only measurable difference was if the car was stationary for any length of time, at which point the cold air systems showed reduced intake temps both during the stationary period and for about (IIRC) 2 seconds after moving off, although I assume that depends on how fast you accelerate. The conclusion seemed to be that it wasn't worth changing.

 

[paul howells]

you boys getting horny by a little piece of plastic then.
I have run one for about 8 years,makes a nice little noise if you listen carefully.
It is a standard turbo part and gt2,it fits up through the intercooler to get a better air supply,as the intercooler blanks out most of the engine space,and reduced air fllow to a standard airbox.
Power is not affected,as said when moving.
intake air temp certainly does effect power and the ecu map as said by the good doctor clubsport.

 

[Richard Dawson]

I had not heard of this part until this thread, but wonder why Porsche did not fit it to the 993 n/a models if it does in fact assist?

It may even hamper 993 n/a power if it is restrictive; that restriction possibly balanced out in a turbo car by the fact with the turbos in there their engine bays do get hotter?

I would be interested to hear of anyone who has some dyno results. If it does help then at £50 it is a bargain!

 

[clubsport]

Richard, you cannot fit this part to a regular 993 with the retractable spoiler, it requires the extra space available with the fixed rear spoiler of the TT/RS/CS.

don't know about it being a bargain, I thought I paid £18 plus poastage for one about 5 years ago, in the days before Porsche upped prices and the weak £.

 

[Nick Moss]

It's still £39.49 from Porsche. Probably not fitted to standard cars as it would fill the intake with water in the rain []. I will get one for Oulton, anyone can try it if they want to see if we can hear the difference.

 

[clubsport]

Nick, they have an ingenious hole drilled in the bottom of the moulding for incoming water to run out of,,,this piece of moulded plastic should probably be displayed in a case at Cornbury house, the design, attention to detail and now the interest in it are all in all quite remarkable! []

 

[RIVIERAM002]

http://www.pelicanparts.com/catalog/shopcart/911L/POR_911L_FULint_pg1.htm#item1
Some tech info on induction kits for 993 rs.

 

[Nick Moss]

Standard 993 intake

Turbo intake

 

[clubsport]

Have they changed the design of this miracle of plastic moulding?..I thought mine was slight;y more L shaped with the water trap at the bottom??

Hope you are blown away by the power increase Nick.

 

[Nick Moss]

Haven't tested it fully yet. It was snowing when I went to the Post Office to collect my pension yesterday . I will give it a better test chasing Vic's baby blue cup car up the M6 Toll later today