The Scrapcento

[maczo]

Originally Posted by Sven7

Man, rally is fun. Looks like you had a good time though.

If I may...

Yes, lots of fun

And yes, by all means, do comment on my driving! I'm still getting to know the car but somehow I feel I cannot squeeze much more out of it. I hope to get into its rhythm, but I'm not sure what to do (except for driving, driving and then some more driving) to get there. On my defense I can say that the slalom part was pretty tight, but yes, it felt kind of sloppy there.



Thanks for pointing out the mid-corner correction, it was something I also noticed when reviewing the footage.

As for the Kamm-back - I've tossed it in the garbage but I will be remaking it some time in the future.

Originally Posted by AndrzejM

Good luck with Scapcento! I'm sure you can go as low as 4.5l/100km avg (52.27 mpg US) without big effort.

Well, I already know that is not the case, sadly. I've really struggled to get FE to its current point (6.5 ltr / 100km) and for the last 2 tanks it's been rock-steady (6.54 vs 6.58 or something like that). I really hope I can improve on it, but surely not that much, at least not "without big effort".

And if you don't want to invest big bucks maybe you should go for vacuum gauge? That would be the cheapest FE gauge, and it's good enough to give you proper feedback. MPGUino is not expensive too I can help you to build one if you wish. Right now I'm building new one for Berta and that will be probably first MPGuino in diesel car (correct me if I'm wrong)

Anyway it's good to know that ecomodding becomes more popular in Poland.

Thanks for the help offer, but I won't be pursuing the 'guino in the foreseeable future. BUT when you build yours, I'd be curious to see it and hear about the total costs

That vacuum gauge is probably the first thing I will consider if/when I consider additional instrumentation.

[Sven7]

Yeah, more driving should help. Forgot to say one thing. I don't know if you're doing it or not, but when you pass each cone you should already be nearly pointed at the next one, apexing each in succession. This helps your rhythm, as you've now got time and space to make corrections more smoothly.

[maczo]

Thanks, I will try to remember that the next time

Finally I have the FE numbers. We did 404 kms, filling up with 28.26 ltrs of fuel for a final FE of exactly 7.0 ltrs / 100 km or 33.6 MPGus.

What's more interesting is the split FE for each day:
- Day 1 = 284 kms and 7.2 ltr/100km. This included going to Wyszków, quite a lot of thrashing the car and then getting back to Warsaw
- Day 2 = 120 kms and 6.55 ltr/100km. This included going to Wyszków, 2 very short runs and going back to Warsaw at a steady 80km/h. There was a traffic jam when entering the city, but other than that - just taking it easy at 80 km/h on the expressway (getting passed by literally everything, from other 'centos through buses to long-haul trucks).

What this means for me is that getting less than 6 ltr/100km is going to be VERY hard. What's better for FE than a constant-low-speed-top-gear ride for several kilometers? (well, ok, perhaps P&G, but I'm not going to do it for several kilometers, in traffic, on an expressway)

[Sven7]

What's better for FE than a constant-low-speed-top-gear ride for several kilometers?





(Ok, I'm done bugging you)

[AndrzejM]

I'm very surprised by your numbers. I was making 6l/100km in VW Polo 1.4 without any effort, and less than 5l/100km with basic ecodriving techniques.
I'm almost sure that there's something wrong with your engine, maybe lambda sensor is messing up? Have you tested exhaust gasses recently?
You’ve mentioned that you have close ratio gearbox. Can you tell me what’s the engine speed let say at 100km/h?

[maczo]

Originally Posted by Sven7

True
But I was addressing the possibility of getting 4.5 ltr/100km without effort. So your answer is disqualified

Originally Posted by AndrzejM

I'm very surprised by your numbers. I was making 6l/100km in VW Polo 1.4 without any effort, and less than 5l/100km with basic ecodriving techniques.
I'm almost sure that there's something wrong with your engine, maybe lambda sensor is messing up? Have you tested exhaust gasses recently?
You’ve mentioned that you have close ratio gearbox. Can you tell me what’s the engine speed let say at 100km/h?

Well, that may very well be the case. The lambda hypothesis should be verifyable with a voltmeter, shouldn't it? I haven't checked the gasses, I couldn't even get the shock absorbers checked when I asked for it. That sort of control station

I will check the RPMs during the weekend and get back to you. Thanks.

[some_other_dave]

Originally Posted by Sven7

... when you pass each cone you should already be nearly pointed at the next one, apexing each in succession.

I found that I talk to myself on the track. The main thing I was saying was:
"Look ahead look ahead look ahead look ahead look ahead..."

The apex next to you is no longer important. The next apex is the important one. Always know where the next one is, and be looking at it!

-soD

[Sven7]

Originally Posted by maczo

True
But I was addressing the possibility of getting 4.5 ltr/100km without effort. So your answer is disqualified

I dig, but look at the long term... aero works so you don't have to. Put in a couple weeks then drive however you want.

Originally Posted by some_other_dave

I found that I talk to myself on the track. The main thing I was saying was:
"Look ahead look ahead look ahead look ahead look ahead..."

The apex next to you is no longer important. The next apex is the important one. Always know where the next one is, and be looking at it!

-soD

Hah, I say, "GO GO GO SH*T SH*T GO GO GO GO GO AGHHHH!"

Good advice on looking ahead.

[maczo]

Originally Posted by AndrzejM

Can you tell me what’s the engine speed let say at 100km/h?

I checked the RPMs today. I was not able to go faster than 90km/h (short route in the city center), but I noted down the RPMs for that speed: ~2600 RPM.

I have to note also, that:

1. I've seen 7-10 l/100km stated as the normal FE for a 1.2 8v 'cento (on forums and allegro.pl)
2. My exhaust is custom (since the 900ccm one was too restricting) and it may be quite far from optimal.

[AndrzejM]

Originally Posted by maczo

I checked the RPMs today. I was not able to go faster than 90km/h (short route in the city center), but I noted down the RPMs for that speed: ~2600 RPM.

I have to note also, that:

1. I've seen 7-10 l/100km stated as the normal FE for a 1.2 8v 'cento (on forums and allegro.pl)
2. My exhaust is custom (since the 900ccm one was too restricting) and it may be quite far from optimal.

2600 is pretty high, but I've seen worst. Anyway Punto with your engine has 5.3 l/100km average, by the factory, so your Scrapcento shouldn't be worst. Have you tried to P&G?