Date: Tue, 6 Jul 2021 11:42:31 -0700
Reply-To: Dan N <dn92610@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dan N <dn92610@GMAIL.COM>
Subject: Re: Trip Report & other data Oil temperature
In-Reply-To: <CAK9Aa+nOv7zsjkF3NPOF7xLZUwcMQ136G6PZ8APFieh52Lh=9Q@mail.gmail.com>
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also.... I mentioned previously *"- Homemade air scoops on both rear
vents."*
If anyone wonders what this is, here is a link for the picture.
https://www.thesamba.com/vw/forum/album_page.php?pic_id=1267740
a member of this forum (Michael Magnani) has them too.
***
and this from Christopher Schimke at T3Technique
*" I agree! It is not just theory. It has been proven by several different
people that:- Oil coolers and/or intercooler/charge coolers that are placed
in bottoms of the side vent plenums see temperature drops at speed
with scoops installed versus without.- Engine coolant temps drop in hot
weather with scoops installed.- Engine bay temps are lower when stopping
after a long drive. (makes for nicer camping right after a long drive on a
hot day since there is much less heat soaking into the rear mattress).- The
pressure in the top of the stock air intake plenum and the pressure in the
engine compartment at the bottom of the intake plenum is nearly identical
and that adding scoops increases the pressure at the top of the plenum and
decreases it at the bottom of the engine compartment (indicates increased
airflow).- That creating an opening to the rear (via opening the oil filler
door, holes, louvers, vents, whatever) to release/vacuum out the air from
the engine compartment increases the effectiveness of all of the above.?*
On Tue, Jul 6, 2021 at 9:32 AM Bruce Todd <beeceetee@gmail.com> wrote:
> Thanks very much Dan for making the effort of running this test /
> experiment with all the details provided. Curious to hear what other
> comments may follow. Also curious to know what the temperature of your oil
> actually is given all the various readings.
>
> Bruce
>
> On Tue, Jul 6, 2021 at 8:21 AM Dan N <dn92610@gmail.com> wrote:
>
>> I told Bruce that I will record the engine temperature on my van for him
>> and send it to him... I am not sure what is relevant. I did as best as I
>> could.
>>
>> Van description.
>> - 1990, Tin Top Syncro.
>> - Rebuilt 2.1 WBX with about 5K miles.
>> - 14" wheels with General Grabber AT2
>> - Vanistan oil cooler with fan.
>> - Home made air scoops on both rear vents.
>> - Small Thule cargo box on the roof.
>> - Engine and radiator were recently pressure washed.
>> - No oil temp. and no oil pressure gauges.
>> - 20W50 Lucas High Zinc oil (not synthetic). Oil level is between 2 marks
>> on the dipstick.
>> - One bottle of Lucas Super Coolant in the coolant system.
>>
>> The drive:
>> - 9 miles one way on 2 lanes country road, 4.5 miles of flat terrain
>> (about 55 mph), 4.5 miles of twisty uphill road (about 40 mph on 3rd gear).
>> Total drive 18 miles.
>> - Temperatures are measured using a Ryobi IR gun after 9 miles out and
>> after 9 miles back. Ambient temperature 90°F.
>> - Driver only, empty van with some tools.
>> - Have AC but not ON.
>> - Some stop and go in traffic in town.
>> - The temp. needle stays on top of the red LED.
>>
>> Temperatures measured at:
>> - Vanistan oil cooler: 170°F
>> - Hose from engine to oil cooler: 195°F
>> - Return hose from oil cooler: 170°F
>> - Oil filter: 250°F
>> - Heat exchanger: 268°F
>> - Thermostat tower: 162°F
>> - Coolant expansion tank: 190°F
>>
>> I am not sure about the accuracy of my measurement but I tried ... :-)
>> I will re-measured at a specific spot(s) if there's any request.
>>
>> dan
>>
>>
>>
>>
>> On Mon, Jul 5, 2021 at 6:04 PM Bruce Todd <beeceetee@gmail.com> wrote:
>>
>>> A quick update - came home from work and replaced the oil temp sender
>>> with
>>> the proper one - looked at it closely and it even said VDO on it even
>>> though I bought it separately from the VDO gauge. Removed about 600
>>> millilitres of oil in the process and went for a drive around the City in
>>> after work traffic.
>>>
>>> Now I never got out on the open road so I couldn't really get going to
>>> check on things too much but I can say that around town stopping and
>>> starting in mid afternoon sunny weather I was running about 218 F with
>>> the
>>> first stage of the fan kicking in and out. Not a lot of consistent air
>>> flow or sustained speed. Oil pressure at idle was a little higher at 21
>>> psi from 18/19 yesterday - not sure if it had anything to do with
>>> draining
>>> the oil level down which in turn kept things a little cooler.
>>>
>>> So now it seems I am a bit more in the ballpark when it comes to oil temp
>>> and can start dialling things in a bit more to understand the operation
>>> of
>>> my motor. I think both suggestions made quite a difference.
>>>
>>> Bruce
>>>
>>
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