[Es2] things that tend to break on es2's at the track

[Steve Eiche]

Dave,
There is just barely room for the larger radiator with either stock 250W 
or the big 500W  fan.   My ur quattro has the thick Diallynx radiator, 
and it just clears with the big fan.  That is also with factory ABS and 
the big reservoir for the headlight washers that wraps around the fan.  
I don't know what the CQ uses for a fan, but the ur quattro uses three 
speeds, and will work just like stock albeit with the RS2 fan wiring.  
The shroud was pretty reasonable I believe, like less than $100 with the 
flap and bracket.  The most expensive part is that big fan.

I do have a spare RS2 oil cooler with like new lines and shrouds that I 
might be willing to part with.  It is the same size as a 200q or S4/S6, 
but where the lines come out is a bit different.   The front mount 
coolers that I have seen use plumbing that enters at the top.  That 
means oil changes don't get everything, but there is no drainback with 
the engine off.  I'm not sure that drain back would be a problem even if 
it did enter at the bottom as the oil wouldn't be able to back up 
through the pump, and I would like that it would take a LONG time to 
drain through the rest of the engine.

Steve

David Kase wrote:

> What am I missing?  Is there no room for the stock fan/shroud with the 
> thicker rad?
>
> The stock set up seems well designed and has two speeds.
>
> Dave K.
>
> Miller, Chris wrote:
>
>>Agree that a bigger oil cooler is needed.  I assumed that mounting the
>>cooler up high, like in the stock aux. radiator position, would be bad,
>>as it might drain back when the engine is cool.  I'm hoping to mount
>>mine in the lower right corner, below the airbox, with some ducting to
>>move air to/from it.
>>
>>I'll have to price that RS2 fan shroud... was planning to cut/glue
>>together something from the 200 fan shroud.  If it isn't crazy $$, the
>>RS2 unit would be a nice easy upgrade.
>>
>>Chris 
>>
>>-----Original Message-----
>>From: es2-bounces at audifans.com [mailto:es2-bounces at audifans.com] On
>>Behalf Of Steve Eiche
>>Sent: Wednesday, June 07, 2006 1:01 PM
>>To: Richard Tanimura
>>Cc: es2 at audifans.com
>>Subject: Re: [Es2] things that tend to break on es2's at the track
>>
>>A larger IC will make the coolant and oil run hotter.  This is because
>>you will be increasing the charge density, thus making more power, which
>>
>>makes more heat.   A bigger radiator is the way to go.  With a big 
>>radiator, you can get rid of the aux radiator (nice spot for a bigger
>>oil cooler), but I would not remove it if you are using a stock size
>>radiator.
>>
>>For cars running lots of boost, a bigger oil cooler is a necessity for
>>track events, etc.  This is because oil is used to cool the pistons,
>>like water is used to cool the block and head.  If you are only taking
>>care of the coolant, you are only doing half of the job.
>>
>>Steve
>>
>>Richard Tanimura wrote:
>>
>>  
>>
>>>That's interesting Dave. I have an S2 where I removed the aux cooler 
>>>and I would agree with you. I think it made a small difference and I am
>>>    
>>>
>>
>>  
>>
>>>running slightly hotter than before. In retrospect, I think Audi put in
>>>    
>>>
>>
>>  
>>
>>>the aux rad for a reason.
>>>
>>>I have heard it argued that a larger IC, by lowering the charge temp, 
>>>will lower engine temps. The lower intake temps propogate through the
>>>    
>>>
>>engine.
>>  
>>
>>>Makes sense to me.
>>>
>>>I have not done it yet, but my idea was to remove the aux rad to make 
>>>room for a larger IC. I figured the effect of the larger IC would 
>>>cancel the effect of the aux rad removal. So far I have only gotten
>>>    
>>>
>>half way.
>>  
>>
>>>Richard
>>>      
>>>