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Fuel

No oil cooler fan on my car, just the stock 'tube oil cooler' in the drivers side front wing. My car has never over heated, I was just pointing out that not moving is the only thing that gets my car up to temp.

The later 3.2's have an oil cooler that is more like a 'normal cars' water radiator. These radiator type coolers also have a stone guard/cowl & a fan fitted to it that is thermostatically controlled from the temp of the oil. This can then blow out hot air and cool the radiator type cooler. Shop around for prices.
cooler_kit.jpg



 
ORIGINAL: twinny

Guys, our cars DME's are dumb as the engine does not have a knock sensor therefore the only way to gain any real benefit from 98+ RON fuel is to have the ECU remapped.
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Not totally true. Whilst any ignition timing advance featured within a remapped/chipped ECU may need a higher RON fuel to safely liberate the associated extra horses super unleaded fuels will IMHO still provide potential power/mpg benefits for a car with a standard ECU. Aside from the pre-detonation/knock factors (which may not be an issue for a standard car running on 95 RON) then even at quite modest compressions/timings/chamber temperatures etc .. super unleadeds will still burn more more smoothly and consistently and release a few more bhp than standard 95 RON grades.
 
ORIGINAL: TopCarrera

ORIGINAL: twinny

Guys, our cars DME's are dumb as the engine does not have a knock sensor therefore the only way to gain any real benefit from 98+ RON fuel is to have the ECU remapped.
Click to expand...

Not totally true. Whilst any ignition timing advance featured within a remapped/chipped ECU may need a higher RON fuel to safely liberate the associated extra horses super unleaded fuels will IMHO still provide potential power/mpg benefits for a car with a standard ECU. Aside from the pre-detonation/knock factors (which may not be an issue for a standard car running on 95 RON) then even at quite modest compressions/timings/chamber temperatures etc .. super unleadeds will still burn more more smoothly and consistently and release a few more bhp than standard 95 RON grades.
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TC wot you doing here![:D] Ahh nit picking...you know what I meant. The DME can't read the higher octane fuel.
 
ORIGINAL: johne

i have a 3.2 cabrolet supersport. what is the best fuel for my engine . had a top end rebuild last year and was wondering if it is best to use super unleaded or normal or weather i should be using an addative such as redex or any other suggestion
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I like whisky and brandy. Mackay's whisky and Three Barrells brandy does the job of getting one inebriated but tastes like parafin so I don't drink it. Single malt and VSOP/XO all the way because it's better.

It's a quality thing. Mobil One in the engine, VPower in the tank.
 
Humm

In theory, a fuel with a higher octane could also be of lower quality (though I'm not suggesting they actually are). I do recall it quoted that the calorific value of some high octane fuels being lower than a fuel with lower octane, and may liberate less energy, though the higher knock resistance means that a higher percentage is turned into mechanical energy.

Octane is just one parameter in a fuels quality.
 
Didn't know that Gary. Any links for me to read about that? Would find it interesting.

EDIT: Apart from E85 which would do what you are saying.
 
ORIGINAL: robfield

Hi,

I read all the replies, I know mines a bit late, but I don't think anyone mentioned the RON adjustment screw on the ECU. Porsche built their engines capable of running in extreme conditions around the world where fuel quality may vary. The standard map is very conservative, thats why chips are so good on these cars.

Now, I don't know generally what setting the cars left UK dealerships with but I know this screw exists as I have set mine to max i.e. top RON available. This is easy to check and perform. Now I only use Super. I filled up with 100RON in Adenau. Max to min equated to 8hp on my car. (I doubt if they are set at min for UK but I wanted to see what difference it made)

If anyone still looks at this thread & wants to know how to get to it I can leave instructions.
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Are you sure that affects the ignition timing?
 
It does indeed change both the mixture and the timing.

http://motronic.ws/

Select FQS - fuel quality switch from the menu on the left.

What is noticeable, it that the switch position does not run from full lean to full rich,

so if you have wound it to position 7, you may be running leaner than standard but with retarded ignition !
 
I dreamt of owning a 911 for forty+ years and was recently in a position to realise that dream (early retirement etc.). It is an indulgence, but unlike most indulgencies, probably won't loose me a shed load of money if looked after. I love the car to bits - it's abilities and quality never cease to amaze me. One thing you will NEVER catch me doing is filling it with supermarket fuel of any grade. With the miles most of us drive in these cars, a couple of pence per litre will make very little difference to the annual running cost in comparison to other expences. Remould tyres anyone??
 
Remould tyres are an inferior product.

Normal and super are of the same quality but with different specifications.

It could be more significant where you buy your fuel. A garage that sells little super unleaded, could have fuel thats sat in the tank for a long time, collecting moisture and losing some of the more volatile components in the mixture.

A supermarket can be a really good place to fill as its often cheaper, and you get a lot more turnover of fuel in the tank. The fuel quality is as much guaranteed here as in most other garages.

After all that [:D], I do fill with super, and not at a supermarket (as ours does not do super), but the garage I go to does have a lot of people filling with super.
 

ORIGINAL: robfield

Hi,

I read all the replies, I know mines a bit late, but I don't think anyone mentioned the RON adjustment screw on the ECU. Porsche built their engines capable of running in extreme conditions around the world where fuel quality may vary. The standard map is very conservative, thats why chips are so good on these cars.

Now, I don't know generally what setting the cars left UK dealerships with but I know this screw exists as I have set mine to max i.e. top RON available. This is easy to check and perform. Now I only use Super. I filled up with 100RON in Adenau. Max to min equated to 8hp on my car. (I doubt if they are set at min for UK but I wanted to see what difference it made)

If anyone still looks at this thread & wants to know how to get to it I can leave instructions.
Click to expand...
Hi Rob
please leave me instructions
Bob
 
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