Fabia 2 vRS CTHE

[ElectricalVRS]

Greeting folks,

 

my name's Stefan and I'm from Germany. I apologize in advance if I'm wrecking the english grammar a lot, but I hope you'll get the point :-).

 

I'm driving a Fabia 2 vRS, build in April 2014 and delivered in July 2014 with one of the latest CTHE engines on the market. I have done 38.500 km (29.300 miles) till now and enjoyed every second in this car. It's really impressive fast and more important: 0.5 liters of oil till now.

 

So I've seen here on Briskoda someone's using "Dash Commands"-App on his Android phone to see some figures about the car while driving. I, as curious I am, installed the app aswell and was happy about that to get some informations about my car (OBD-Adapter needed). Does anybody know how accurate those figures are, specially the figures in the "performance" tab? I accelerated several times while let the program record and have seen some very high numbers which I can't believe.

 

pic: 

 

This was done in the second gear, pedal to the metal and stopped accelerating after gearchange to the third gear. My engine's completly stock. Just installed a carbon intake and replaced the oem one. I'd like to verify these numbers and kindly ask to you all, to record your numbers aswell and post it here.

 

And for you @ Goneoffski, no I'll not remap my car *laughing* (have seen thousand of posts of you in google asking for a remapped CTHE)

 

Cheers

Stefan

 

[Rooted]

Welcome to the forum.

 

That will be hundreds of posts possibly in the 3 threads in this forum asking of anyone with a remapped CTHE in a Skoda,

someone that personally has done or someone that knows of one other than done by Eco-Tune.

nothing online from me asking them not to remap one.

(now there are many thousands of other posts on Oil Use, and maybe millions if we are going to exaggerate!)

 

So still waiting to see the Dyno on a Stage 1 or 2 CTHE Skoda.

Edited 19 August, 2016 by GoneOffSKi

[ElectricalVRS]

Thanks Goneoffski,

 

well I've ment thousand of posts on briskoda - wasn't precise enough.

 

However, found this video: 

 

A stock vRS he says. Quite fast, isn't it? Still waiting for some people to post their hp numbers related on the app "Dash Commands" OR someone explaining me if my numbers are just some random numbers which need to be calculated, divided, multplicated and what so ever and the real output is: 180 hp. Not more. Not less.

 

Cheers

Stefan

[Rooted]

Maybe look at the threads on here where members posted their Dynos of standard CTHE.

The CAVE was 178HP (180ps) minimum.  and that might be on 95 Octane.

Many are around 185hp on 99 octane/.

furbytoms Dyno with a standard CTHE is 189bhp i seem to remember.

 

EDIT.

http://briskoda.net/forums/topic/357839-fabia-vrs-estate-rolling-road-run

 

http://briskoda.net/forums/topic/224085-torque-engine-diagnostic-tools/page-2

Edited 19 August, 2016 by GoneOffSKi

[FlexibleMouse]

The hp numbers will only be a guesstimate and depends on how accurate the information that you enter into the app is. Another way to estimate power is to find out the car's trap speed at the quarter mile. With a known weight and trap speed, the power to weight ratio can be estimated. A standard VRS traps at about 94mph.

[ElectricalVRS]

Hey guys,

 

thanks for the information.

 

I recently bought the torque pro app, configured it correctly and did some measurements with it. Did some 0-100 kph runs, with an ambient temperature of 28° Celsius and managed it to get a clear 6.7 seconds gps measured a couple of times. After some more 0-100 runs the car soaked heat and it took me ages to get to 100 (6.9 to 7.2). Maybe a CAI would help? The Horsepower on the wheels shown in the app says something about 153hp at 5.583 rpms which is around 175 horsepowers with 15% drivetrainloss but with 285 NM of torque at 4.403 rpms (which is quite high, isn't it?). 

 

Fuelwise I'm always using Aral Ultimate with 102 roz.

 

According to http://www.060calculator.com/ with a car weight of 1.335 kg, the car needs to have around 194 hp to achieve 6.7 seconds to 100 kph which I more believe.

 

Cheers

Stefan

[Furbytom]

If you want to know how much power it's making just book yourself a power run on a dyno. It's good fun and not expensive to do :-)

[Rooted]

The car weight needs to include the driver.

eg i weigh 115 kg, used to be 120kg.   so there is 50 kg more than one with a 65kg driver

 

The Hatch has 25kg ballast on the rear cross bar which can come off and that make the Kerb / Unladen weight less than the bigger Estate.

The estate as standard with stronger rear springs as it is gets better traction off the line than a standard hatch.

 

Remove the rear weights, remove the spare wheel and 40+ kg is out of the rear.

 

Fully loaded with 2 spare wheels, tools extra fuel and my weight but weights removed in a CAVE hatch it weights 1,444 KG, and still gets a 6.7 second 0-62mph

Stage 1 with all the crap out 6.1 seconds.

Not much better, but then 30-110 very much is.

 

VrsGeo with a CAVE with new engine weights on, spare wheel and a car full of gear got 6.1 seconds 0-100kmh i seem to remember.

 

Cool ambient but good surface traction and tyres helps loads, stiff suspension helps traction 

& TC on with Wheel spin can mean power is cut.

[ElectricalVRS]

Thanks for your advice GoneOffSki.

 

The spare wheel is already out of the car. The 25 kg on the rear is something I'd consider removing. Have seen a lot of threads here on Briskoda. It is really THAT worth removing the rear ballast?

 

Well the car weight is included one driver (I'm 75 kg now ;P) and around 20 litres of fuel, so a total of around 1.335 kg and I didn't managed to get under 6.7 seconds from 0-100. Sure, I'm still wearing the original Conti's, but I don't think that hyper sticky tyres would make a big difference because I nearly launched at full speed on "D" and let the gearbox do the work. I think I could manage 6.6 second if I try everything I have with everything removed (even the rear seats plus sticky tyres) but I don't think that I could achieve a 6.1 to 100. Clearly a fact.

 

Didn't felt any difference with TC on or off. Sometimes it's cutting power from first gear to second, but that's not that often. Well the roadsurface was something between mediocre and good, but not as good as a freshly paved road.

 

Sadly, so it seems my car's one of the slower ones but it feels pretty quick. Even scared some Audi S5 with 333 Hp V6 Turbo but anyways, it's faster than the claimed 7.3 seconds :-).

 

Cheers

Stefan

Edited 23 August, 2016 by ElectricalVRS

[Rooted]

If you have accurate timing try a set of 215/40 R 17 on the front and compare to the 205/40 R17

 

VW / Seat & Audi had heavier twincharger cars than the vRS Hatch. (Audi claimed 185ps minimum)

They were on 215/40 R 17's as standard.

Their official performance and economy figures showed heavier cars as faster and using less fuel.

Kidology really, like putting 25kg on the rear of a hatch and spare wheels in and standard in the Skodas. 

and still they were lighter, the Hatch would have been the lightest.

[mmmRacer]

G'day Stefan

 

Glad to see you are enjoying your Fabia. Here are the Torque App results from my stage 2 CAVE during a 1000m runway event last year. In general I do think the car could good a bit faster then this if 2 simple things changed. Firstly the road was a rural airway which had almost no grip and we could not do burn outs to warm up the tyres. Secondly after running 235/40R17 tyres for over a year now I think the extra rotating mass weight is slowing me do at the top end. The 235/40R17's are 2kg each heavier then my old 215/40R17's. So going back to 215/40R17's for next set on the 17x8 wheels.

 

For your speed runs I suggest using traction control for your launch and then turn it off after you get off the line so that it doesn't cut the power when you are shifting into 2nd and 3rd.

 

[ElectricalVRS]

Good day mmmRacer,

 

yeah, the car is impressive for it's size but it's sometimes dangerous because too many people underestimate the car (specially when someone's trying to overtake me and you're putting your foot on the pedal). 

 

Your figures are amazing, can't imagine how fast that feel. How much horsepowers do you have with an APR-stage 2 tune? I see your wheel horsepowers shown at 177,3 HP, which should be around 208 HP at the flywheel with 15% drivetrain loss, am I correct? So If you say you have around 220 hp, that means the drivetrain loss are around 20%. That means that my Fab mk2 vRS put's 191 HP on the flywheel. 

 

Well, about bigger tyres I'm not sure if the German TÜV won't go berserk if I put bigger tyres on the standard 17 inch Gigaros because it's not shown as a "allowed" tyre size in the car papers (hope you know what I mean - lol). 

 

I'll try what you mentioned about the TC and will post the figures.

 

Cheers

Stefan

[mmmRacer]

G'day Stefan

 

I have had my CAVE on a dyno once before and It was putting out 132kw (178hp) at the wheels. So I think the Torque App figure is not too far off on its estimate. At the flywheel I am guessing about 220hp. However the general view from most people /posts on the forums is that the CTHE motor puts out more power then the CAVE's stock. So from what I have seen 191hp at the flywheel for a CTHE is about right. As there is not much info about tuned CTHE's from anywhere in the world I would say for now that a tuned CAVE and tuned CTHE put out similar power.

 

I know a little bit about the basics for the German TÜV which basically means all of your mods need to be government approved. Previously I had Audi A1 factory wheels (17x7.5) on my car with 215/40R17 tyres which are the same size as the factory spec VW Polo GTI and Audi A1 TFSI. At this point we can talk about why but the main point is that you are only going up one size and the other VAG cars with the same chassis come stock with 215/40R17's.

 

Forgot to mention that when you are launching to use Sports mode as it well make at bigger difference off the line as you are starting from 1100rpm instead of 900rpm. From my experience doing hillclimbs my launches are a match for any other car in my class,

 

Regards

Mat