the dipstick on a type 4 passes through the fan housing and cools it slightly so you cant really compare to a type 1 . I really only fitted mine to eliviate the boredom of driving @ 60 ..... i also found slipstreaming lorries made the temp go up .....
Could be the slipstream allows you to back off the throttle, making the mixture leaner for the same amount of revs?
i was propper tailgating ........ i also noted that when stuck in traffic the temp dropped right off down to around 85 which surprised me i just thought this
I've recently fitted temp and pressure senders and a 70's porsche combined gauge in the spare clock hole in the dash. As they were an unknown match for each other I tested the temp using a can of oil on the cooker in the van and a digital temperature gauge. It turned out to be accurate. I first fitted the sender into the standard sump plate, but it fouled the strainer, I tightened it up anyway and went for a drive up the motorway and the highest I got it to was 160F which is about 77C. poking a digital temperature probe down the dipstick hole read about 98C. Not being happy about bending the oil strainer slightly I bought a CSP cast aluminium sumplate which has fins and an angled drain hole to clear the strainer. I installed this and a new strainer now my readings are even lower, the highest reading on a half hour run is 140F or 60C. Though when I got home and left it idling for 5 minutes while I took my bike off the back before reversing into the garage and it went up to 160F (77C). I conclude that the air flow under the bus skews the sump plate senders, more so with the ally one. I did play around with putting a 2k ohm potentiometer in parallel with the sender to "calibrate" it and this is doable, but you'd need to check it at different temperatures because you may be able to get it accurate at normal running temperatures but it might not be right over the whole range. The other alternative is moving the sender somewhere else. I hadn't heard of the type 3 dipstick blanking plate before, I think I may have an AS41 case so that could be possible. The other locations are in the oil pressure relief screw or getting a dipstick sender instead, which I'd rather not do given the frequency I check my oil. I'll probably leave it as is until I go on a long motorway run and the stop and take some measurements with a digital thermometer for comparison.
I found the VDO dipstick sender is fine, and measures oil temp the way VW did it (with a thermometer down the dipstick hole). Useful to get a two-way automotive connector for the wires - they just plug straight on to the top of the sender. Unplug the cables when dipping.
The fan is still drawing air though... I'm with TBR, you'll be using less throttle as you've not got the high pressure drag on the front of the van... it could also be that the air under the van is disrupted, having an adverse effect on the cooling air over the sump!!
scote , the type 4 porsche style taco sump plate is receeded in to the sumpand has a cover to stop air flow cooling it as is positioned as such that it sticks in to the sump at the same point as end of the the dipstick
^^OMG who watched Lost ? 1641 with JK S/S sport exhaust and progressive carb: Standard cooling kit/tinware. Oil temp with VDO dipstick sender: 80 degrees = sender lying on tinware... 90 - 100 degrees : around town 95-100 degrees : in traffic provided tickover is at least 850rpm. 100 degrees : A roads, up to 50mph, 15 mile journey 110 degrees : after 15 miles on the motorway at 55 to 65 in traffic 117-123 degrees: non-stop cruising at 67mph. 130 degrees: woops f**d up - either thermostat/flaps sticking or magnetic anti-rain covers left on air vents after 15 miles on motorway.
^^^ dont get the Lost reference, got bored of that series after a while... Guess I'll splash for dipstick sender then seems the simplest option, all the usual suppliers have them at £44.50 apart from coolair at £44.95, price fixing? anyway TLB discount at coolair should be the cheapest. sorry for the thread-jack
We had the same effect on the GP Yamahas at Spa, temps went up when in 2nd, slipstreaming, but when you hit the lead temps actually went down even though you were running faster lap times.
I had the sump sender, but I mounted it in a t-piece half way along the return pipe from the external oil filter fitted to my full flow system. This meant the temperature I was taking was the temp of the oil just before it went back in the case. It would, from there go past the oil pressure sender, through the oil cooler and then through the bearings. It would have had a little bit of a chance to cool, having gone out of the case and into an external oil filter, which hung in the airflow running under the van. Remember that oil in the sump is at its hottest, because it's just been through the bearings.
exactly. Porsche appear to have got the hang of the "building good cars" thing and that is where they designed the sensor to go. Works for me I guess.
Lost Season 3 Episode 10 - "Tricia Tanaka is Dead" . They find a minibus on its side in the jungle. After many years lying over its fuel filler side it starts and the lads have fun driving in circles. The beer inside is also drinkable but Ben's father still inside is quite dead. scote's and our bus are the same colour scheme. Ours is that colour because of Lost.
