[s-cars] Cold Air Intake Mod Reduces Turbo Temp

[Tony Curran]

Have VMAP, sockets and desoldering braid (solder suckers are a bit
destructive - never used them in aerospace industry). Plan to use a tie wrap
to hold chips in after installing. For now I work for Nortel and have access
to very good sodering irons, ground strap etc.

Tony
96 S6

-----Original Message-----
From: Mark Strangways [mailto:strangconst at rogers.com]
Sent: April 26, 2005 9:31 PM
To: Tony Curran; S-Car-List at Audifans.Com
Subject: Re: [s-cars] Cold Air Intake Mod Reduces Turbo Temp


Do you have the 3.0 bar sensor (Vmap)
Do you have desoldering equipment ?

Pick up some sockets for the chips, I like ZIF's but I will catch hell from
the list for it.
..... They don't come loose...... :-) But YMMV.......

Mark S
----- Original Message -----
From: "Tony Curran" <tony.curran at sympatico.ca>
To: "Mark Strangways" <Strangconst at rogers.com>; "S-Car-List at Audifans.Com"
<s-car-list at audifans.com>
Sent: Tuesday, April 26, 2005 9:28 PM
Subject: RE: [s-cars] Cold Air Intake Mod Reduces Turbo Temp


> Hi Mark,
>
> Got chips from The Source (Bob Myers during GB @ Xmas). Yup I'll be doing
> it
> myself - I was a hardware engineer once upon a time but haven't dabbled
> too
> much with soldering iron recently but plan to practice on some old
> computer
> boards at lab where I work.
>
> Tony
> 96 S6
>
> -----Original Message-----
> From: Mark Strangways [mailto:Strangconst at rogers.com]
> Sent: April 26, 2005 9:21 PM
> To: Tony Curran; S-Car-List at Audifans.Com
> Subject: Re: [s-cars] Cold Air Intake Mod Reduces Turbo Temp
>
>
> Tony ,
>
> I will likely be at my cottage this weekend...
> It is located about an hour or so outside of Ottawa.
>
> Should you have any issues with MRCing you car, feel free to contact me.
> You are chipping to car yourself ? Where did the chip come from ?
>
> If you want my phone number, I can send off list....
> Don't want that Paul K guy calling about s-fest 2005 all the time ....
> Bahahhhahah
>
> Mark S
> ----- Original Message -----
> From: "Tony Curran" <tony.curran at sympatico.ca>
> To: "S-Car-List at Audifans.Com" <s-car-list at audifans.com>
> Sent: Tuesday, April 26, 2005 9:02 PM
> Subject: [s-cars] Cold Air Intake Mod Reduces Turbo Temp
>
>
>> Here is what may be considered un-scientific results of air temperature
>> measurements of air flowing just behind the turbo before and after cold
>> air
>> intake mod. For the mod, the OE intake hose was removed leaving an
>> increased
>> airflow path from grill to turbo. Also temperature of air scooped in is
>> at
>> lower temperature (heat from engine does warm up OE scoop). A NTC
>> thermistor
>> was mounted on the oxygen sensor cable protruding in to air space just
>> behind turbo and wastegate and wired to ohm meter in cabin - the lower
>> the
>> measured resistance, the higher the temp (same device used for both
>> tests).
>>
>> Test conditions:
>> The measurements were taken on the same stretch of road at roughly same
>> time
>> of day with approx ambient air temp: 16 deg.C +/- 1 deg.C (1450 ohms :
>> 1000ohms at 25 deg.C). The speed was set via cruise control to 115km/h.
>>
>> Results...
>>
>> Measurement Time Before Mod After Mod
>> Start 779 694
>> 10 mins 605 666
>> 14 mins 602 640
>> 22 mins 550 676
>> 25 mins 670 714
>>
>> The results suggest that the additional air flow over the
>> turbo/wastegate,
>> due to OE intake hose being absent, reduces the operational temperature
>> of
>> the turbo. I know, not enough samples to be conclusive, but indidicative?
>>
>> I plan to place a shield over the exposed air intake hose from the MAF to
>> direct more air towards the turbo to see if this further changes the
>> temperature characteristics and also prevent turbo from heating that
>> hose.
>> BUT this is unlikely to happen before car is MRC'd this weekend.
>>
>> Food for thought...
>>
>> Tony
>> 96 S6
>>
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>