Amazing: The Overkill VP-TDI

Hello again,

Since I was often annoyed by slow drivers and Sunday drivers on vacation (we were usually traveling in a 1.5-ton vehicle with a 129 horsepower gasoline engine ), I researched what affordable cars with everyday qualities one needs to find in order to surpass the overtaking capabilities of my AFN Golf, which has been tuned to approximately 130 horsepower.

Yes, I admit that I occasionally entertained thoughts of straying: the Opel Astra OPC with the 2.0-liter turbo engine (200 hp, 250 Nm from 1900 to 5600 rpm) seemed quite tempting, especially since the current model also has a rather attractive body style.
Its power-to-weight ratio, including the driver, of 6.6 kg/hp (my tractor with 130 hp: 9.0 kg/hp) made me expect a real powerhouse; also, the Astra's power-to-weight ratio at approximately half its rated RPM, i.e., 3000 rpm, with 12.4 kg/hp, is still significantly better than my Golf's at 2000 rpm (15.0 kg/hp).

Since a test drive was not possible due to a lack of test vehicles, I temporarily adjusted the DZR (presumably a device related to engine control) to the speed range of 50 to 100 km/h, which is typical for overtaking on country roads. I then obtained the data for the Astra and modified the DZR to adapt it to the engine speed characteristics of a gasoline engine.

The result: The calculated (and practically confirmed) 5.6 seconds for my tractor is consistent with the calculation for the Astra, with a deviation of less than 0.1 seconds.
Its superior power-to-weight ratio is offset by its less favorable, longer 3rd gear.
Der reicht zwar beim Ausdrehen bis zur Pmax bis etwa 127 km/h (AFN Golf 3 nur 105 km/h), aber wenn man den 50 bis 100 Sprint mit dem Astra im 2. Gang beginnt und Drehzahlen bis etwa 6.600 vermeiden will, muß man irgendwann schalten und verliert dabei wieder Zeit, so daß man praktisch auch gleich im 3. GThe process can begin.

It's quite interesting: approximately 1120 kilograms of VW, originally costing around 16,000 Euros, with 130 TDI horsepower and the corresponding fuel consumption, performs just as convincingly in real-world highway driving as 200 horsepower in a 1250-kilogram Opel (for around 25,000 Euros).
Even the current Ibiza with a 96 kW TDI engine (untuned) is not better, according to the DZR, due to its higher weight and the longer third gear.

So, I'll stick with my VP Golf for now, because a top speed of over 200 km/h is completely irrelevant to me given the current traffic conditions.
The G3 already has (almost) everything I need for everyday use: acceptable costs, surprisingly high power (as mentioned above), good winter handling, and sufficient cargo capacity for a "family" of two.

P.S.:
Before anyone asks, I would like to point out that the makeshift Opel DZR (drag coefficient calculator) is quite unsuitable for calculating the drag coefficient of other vehicles.
I'll definitely send it to you if you request it.

P.P.S:
I will be posting more meaningful content again soon. First, however, I will be updating a few technical articles (you can tell which ones by the date of the last update, which I will include at the top of each article).

Hello,

That's exactly why I bought a different car. With standard cars that have 170-200 horsepower, you can't properly overtake the TDIs on the highway. They wait in front of you for an uphill section, then pull to the right with full throttle. If you can't overtake them quickly, they pull back to the left. You just see the exhaust fumes for the next 50 kilometers because they're no longer making room.But the problem has now been solved.

Sincerely,
Christian

chris11 wrote:

Du siehst die nächsten 50km nur den Ruß, da jetzt keine Motivation mehr zum Platz machen da ist.

Hi Christian,

if the driver behind is prompted by the soot to increase their distance to a more or less normal = safe distance (instead of the TDI creeping into the trunk in their slipstream), then the soot, in such situations, even has a certain justification for me .

Furthermore, my AFN (air-fuel mixture) doesn't show any significant signs of being too rich, even under full load, thanks to the appropriate boost pressure.
And I haven't "reserved" the overtaking lane; I let anyone who wants to pass by – as soon as there's a gap to the right where I can move over without having to brake hard.

Quote:

Aber das Problem ist nun gelöst.

And what kind of car are you driving now?

Hello Ulf,

Most drivers are perfectly fine to deal with, especially outside of peak tourist season. However, when driving quickly, you'll usually encounter a persistent driver who insists on staying in the left lane.

I upgraded from a BMW 523 (170 hp) to an M5 (400 hp), and it's been quite a relaxing experience since then.

Sincerely,
Christian

hi ulf.
130 tdi ps aus nem dreier golf? wie hast du das denn geschafft?

greetings, the cheeky markus

He has a 110 hp engine as a base. Most chip tuners already advertise a power increase to 130 hp. However, I assume that ULF has done even more.

x world one wrote:

er hat einen 110ps motor als basis. die 130ps geben auch die meisten chiptuner schon als leistungssteigerung an. ich nehme aber an, der ulf hat noch etwas mehr gemacht?

"... Anyone who has read Ulf's technical articles can easily count the modifications he makes. I even believe that with these modifications, it's possible to achieve emissions with very little soot, even with the 130 horsepower."

@chris11

Da sind sie mal wieder, die typischen TDI Vorurteile. Ich finde es irgendwie cool, war gestern bei VW in der Autostadt, da gab es einen Bentley mit 6,75 L Hubraum und Turbo, da sollte mir dann bitte ein Benzinerfahrer erklären, was an dem Benziner sportlich sein soll (ging nur bis 4.750 Umdrehungen, dann fing der rote an). Mit dem Benzinergolf (1,6 16V), mit dem ich gefahren bin, haste dich auch kaum getraut schneller als 130 zu fahren, da er dann knappe 11 l gesoffen hätte (sonst 7,4). I much prefer the VW 1Z engine with its 90 horsepower; it runs on the highway at 5.5 liters per 100 kilometers while maintaining a speed of 130 km/h.

Best regards, WarLord.

Hello,

I can't complain about the lack of "sportiness" in the E39 M5. The V8 engine revs up to 7000 RPM with a maximum torque of 500 Nm. The sound is so enjoyable that it doesn't matter much if you have to brake down to 160 km/h occasionally. The fourth gear allows you to reach 210 km/h, and there are still two more gears available. It's very relaxing to drive at speeds above 200 km/h on the highway for long distances, as long as traffic allows.A "test" exists HERE.

As our second car, we have a Galaxy with an AFN engine. That way, we can take everything we need on vacation.

Sincerely,
Christian

WarLord wrote:

@chris11 Da sind sie mal wieder, die typischen TDI Vorurteile. Ich finde es irgendwie cool, war gestern bei VW in der Autostadt, da gab es einen Bentley mit 6,75 L Hubraum und Turbo, da sollte mir dann bitte ein Benzinerfahrer erklären, was an dem Benziner sportlich sein soll (ging nur bis 4.750 Umdrehungen, dann fing der rote an). Mit dem Benzinergolf (1,6 16V), mit dem ich gefahren bin, haste dich auch kaum getraut schneller als 130 zu fahren, da er dann knappe 11 l gesoffen hätte (sonst 7,4). I much prefer the VW 1Z engine with its 90 horsepower; it runs on the highway at 5.5 liters per 100 kilometers while maintaining a speed of 130 km/h. Greetings, WarLord

.

chris11 wrote:

I switched from a BMW 523 (170 hp) to an M5 (400 hp). Since then, it's been quite relaxing to drive.

Hi Christian,

It's probably a nice piece of equipment, but considering the weight and the engine, my relaxation would likely turn into the opposite, especially at the gas station – even if I could buy and insure it for a very low price.
Unless I had a private refinery...

Bertil wrote:

... Anyone who has read Ulf's technical articles can easily count the number of modifications he has made. I even believe that with these modifications, it is largely possible to achieve soot-free operation with the 130 horsepower.

Hello.

The nighttime "soot test" performed in the headlight beam of the vehicle behind on the highway actually comes out completely "clean," even at full throttle.
Otherwise, I just added my signature, but now I'm at the character limit...

Hello Ulf,

Yes, it's true, about 14-16 liters of liquid flow through (approximately 1800 kg), but it's worth it.
Since I mostly travel for work and the gasoline is paid for, it's acceptable.

Sincerely,
Christian

Hi,

@chris 11:
I switched from a BMW 523 (170 hp) to an M5 (400 hp). Since then, it's been quite relaxing to drive.

I can imagine that. My relaxation would probably only be disrupted by the need for a very delicate touch on the accelerator pedal, to avoid rear-ending someone...
We also have a 523i (with an automatic transmission) in the family - it's very quiet and relaxing to drive, but it can be a bit 'sluggish' when overtaking on the highway.
I'm perfectly happy with my old 5-cylinder TDI; it's reliable. The only difference is that I use 6.5 liters per 100 kilometers, while the 523 uses about 10.5.
How much does the M5 typically cost?

@Ulf:
Da der Audi 100 recht schwer ist, kann ich mir schon vorstellen, daß Du mit deinem Leichtbau-Golf + 130 PS sehr zufrieden ist.
What is the approximate maximum torque?

Markus H. wrote:

@Ulf: Da der Audi 100 recht schwer ist, kann ich mir schon vorstellen, daß Du mit deinem Leichtbau-Golf + 130 PS sehr zufrieden ist. Wie hoch ist denn das maximale Drehmoment ungefähr?

Hi Markus,

I am assuming a uniform increase of 18%, calculated as (130 / 110) = 18%.
For the torque, this would translate to approximately 277 Nm at 1900 rpm.

The measured time in a (converted) acceleration test in 5th gear, from 90 to 120 km/h, supports this assumption quite accurately. I no longer remember the exact time, but I think I wrote a post about it once -> comparison to a tuned 150 hp PD Golf 4.

I don't have time to look for it right now.

Hi,

@Ulf:
Thank you!

@chris 11:
Okay, then my question about the fuel consumption of the M5 is resolved - you answered my question while I was asking it...

Hi Christian!

What an impressive report! I can only be envious of your beautiful new car. I wish you many enjoyable miles with it.

Envious greetings, Uwe.