arrived when my son,4x4 & i took ourselves off to jabba for the long awaited re-map. the appointment was for 9am & after walk to the nearest pub (for a coke of course) the job was done by 12.30......a well friendly bunch who offer free coffees.

the report power test showed an increase from 167bhp to 227bhp @6421 rpm. i didn,t fully understand what this difference in bhp really meant until i floored it on the way home.

the first words that came out of my mouth was

HOOOOOOOOOLY SHIIIIIIIIIIIIIIIT.......FOLLOWED BY:D :D .....all i can say to anyone who is thinking of having a re-map is .....get it booked in now.....you won.t be dissappointed & at

Impressive as I assuem the starting point for the 4 x 4 is 160bhp. I'm interested to see what the torque curve looks like as that is what really counts. Can you either scan it and pm it to me or just tell me the peak value/revs and those at say 1000 rev intervals?

Thanks

Chris

Wow great results! - Finally!

Are you coming along on the 24th May then? You probably dont need to go on the rollers again but as it stands there is a spare place..

Try not to have too much fun with your new found power!

WHOAAH! Impressive top horsepower

But like Chris I'm curious to know how power and torque are delivered, as 6500rpm seems fairly high for top power. Did you specifically ask Jabba to tune to get maximum power or did you go for a "torquier" remap? At what revs is maximum torque delivered?

@ chrish/dutch4x4

i,m in the process of trying to get the read-out on a post but haven,t had a lot of success atm, i,ll keep trying. no, dutch , i did,nt ask for any preferences although i was really after low/mid-range acceleration, which as it happens is what i got

@fabiaTDI........yes i.ll be there to make a few comparisons. it will be interesting to see the difference between similar models ,if any......looking forward to it:D

regds ect:D

If it's similar to Ian's (taking a holiday ATM) then Mike left in the natural spike (lump) at about 5.5k rpm...

Ian's plot definitly has the peak lower down though, all depends on the day and engine, fuel etc...great figures though. The APR chip (what I have) is 207BHP with 245lbsft Torque somewhere. I also have the optimax pgm which is another 15-20BHP, don't know for sure, but it's physically different.

I was actually talking to Ian last week about Jabba as the APR stage III (ie 300bhp) looks very expensive touching 4k last guess, but uses a garret turbo ala WRC...

@ect, really glad your happy, it's a hoot, you'll love it, but what did your son say? A budding petrol head or just happy your happy?

Ian's fuel economy is great when he drives it normally, it's just so hard, I try to avoid motorways now :D

@ colinD

he was well impressed with the way he was pushed back in his seat under a boot full of throttle. what really supprised me as much as anything was the instant acceleration that kept going & going to a speedo reading of a touch over 120 mph(oops, i mean 70mph) , how true a reading +/- it was is anyones guess, maybe a board member could verify the accuracy of the speedo.

btw, the r/r day is set for 24th may, but at what time is the planned turn-up time......

best regds ect;)

Originally posted by ect in this post

btw, the r/r day is set for 24th may, but at what time is the planned turn-up time...

The day starts at 10am so i guess planned turn up time will be between 9.30 - 10am.

Looking forward to it, see you there!

:cheers:

Matthew.

many thanx FabiaTDi:D

regds ect

Well done ! That makes 4 modified 4x4's now ? (Colin, Ian, Self, You)

He He He - the most fun is still to be had in pulling away from unsuspecting tailgating 'Germans'

I particularly like 4th gear from say 70mph on the motorway !

I asked Mike to get the max power lower down (5200rpm on a v.hot day) - did you get the adjustable boost fitted at the same time as I 'm thinking about it ?

Originally posted by Fabpreza in this post

Well done ! That makes 4 modified 4x4's now ? (Colin, Ian, Self, You)

Don't forget Stuart J and Barry (Biodad20), so that makes six. And to my sudden amazement I realize that I'm not aware of any upgrade made by our Dynamic Blue moderator - but send the dog after me in case I'm very much mistaken, Denis!

I guess you are talking UK owners only, Rob? Otherwise you could also include otheos.

BTW - suggestion to webmaster - would it be an idea if we could sort the membership list by car?

Sorry Mattijs ! Forgot the Netherland arm !

You're right - We should get something set up to show the car and mods by owner - especially as more

people buy Skoda and ask the same questions again (probably like I've done!)

Fab,

did you send out the power and torque plots? I know you wanted more torque than outright power and it would be interesting to compare when Ect posts his plots.

Would give me idea of either option.

Cheers.

Adrian.

Originally posted by ect in this post

reading of a touch over 120 mph(oops, i mean 70mph) , how true a reading +/- it was is anyones guess, maybe a board member could verify the accuracy of the speedo.

That'd be about 113 mph. Mathmatically calculated of course...

Rob.

Originally posted by SkodiRS in this post

Fab,

did you send out the power and torque plots? I know you wanted more torque than outright power and it would be interesting to compare when Ect posts his plots.

Would give me idea of either option.

Cheers.

Adrian.

Adrian

I didn't bother that much with the plot as my 4x4 haldex system was a bit lazy kicking in on the ro-road so the curve was a bit jumpy.

As mentioned, max power on the day was at 5200rpm of 218bhp with normal unleaded and 77f ambient temp. Torque was 246 lb/ft

I can now confirm that I can go to the R-R day on the 24th so will get a new plot then with Optimax in the tank and hopefully it will be a damp, cold day !

It actually reminds me very much to drive lower down of the V6 2.5 Quattro diesel A4 Quattro (190bhp / 285lb/ft) I had. You can drive it on the torque from 2100-3500rpm and still make very solid progress (and MPG!). OR You can rev it up to 5500 and go as fast as is honestly needed, after which the power tails off.

As I mentioned, I deliberately didn't want a car that I had to rev to the limits to extract the full power.:drive1:

Torque or power.......torque or power.........

.....decision,decision.......

Torque... cos there's a Q in it

Q.

Originally posted by SkodiRS in this post

Torque or power.......torque or power.........

.....decision,decision.......

I'm with Fabpreza all the way!

The Octy is not an F1 car and our roads are not Grand Prix circuits, so I don't see a reason to max out power on the redline, thereby restricting low-rev grunt because of the turbo's relatively small powerband. Unless you're a German spending all your automotive life on the Autobahn...

More torque doesn't make a car faster, it's horsepower - theoretically speaking, as it roughly relates to torque at the wheels instead of the flywheel (which is given by the "brochure" torque figure). The car with more horsepower will always be faster, no matter what diesel drivers will tell you... But then there are gear ratios to contend with - do you have a 5-box or a 6-box, and to what top speed are they geared? Can you - and will you - ever achieve this top speed? How wide/flat is the torque and power delivery? Where does the rev redline come in and how does this effect does gear ratios?

So it's not just a simple matter of torque vs power. However, for me in most real-life situations, the delivery of low-end torque while still having enough top-end power is much more satisfying for me as a driver than all-out horsepower.

Yep - agree as well. Torque translates (in simple terms) into responsiveness, flexibility and good acceleration without too much gearbox stirring. If you have a good torque punch lower down you don't need to redline in every gear to make good progress. You can be fast, quiet and still show other drivers the way. And with our roads what chance do we get to show off at max revs - very few, as Mattijs says. Quick bursts are all we can hope for.

BTW I'm not sure I see why a remap should restrict the driver to one or the other, particularly. Mike didn't ask me what I wanted when he remapped my car, and I didn't have any particular view. I got a substantial increase in both torque and horsepower, reflected in a) better punch when flooring it anywhere above 2000 revs and free-er revving at the top end. Max power was developed at a RPM value I seldom hit, anyway, preferring to change up by about 5500 rpm to avoid excessive noise and fuel consumption. The engine's starting to run out of breath by then anyway. (you guys with the K04 turbos will get better induction at the higher end).

2p worth that turned into an essay, apologies!

I always thought that its torque that accelerates a car, not horsepower, as HP is calculated from torque figures/rpm anyway.

Everything else remaining the same, a car with more torque will accelerate faster.

I'm bound to say this as a TDi driver, but I find in most everyday situations you cant beat torque!

BTW if anyone is inteseted here my last RR plot. Would be interseting to compare it to a 1.8t engine to see the differences in torque characteristics.

Fab - it's too tiny to read really, but I'll try and scan mine tonight - been meaning to for ages. Mine is not typical, mind, being an AGU engine. First impressions are a) on mine the curves go up and come down more sharply but there is a big area under the bulge, and as you'd expect, they're centred around a higher rpm figure.

FabiaTDI,

In everyday situations where you can only have short outbursts of power, you are probably right. But technically and through the laws of physics, you need raw horsepower for both acceleration and top speed.

Your graphic is a clear illustration of that. Your torque curves tails off very quickly, as diesels just can't do high revs because of their huge cranks (which are giving them the torque). So as long as it's single-gear acceleration, your torque will see you through against a 150hp 1.8T, but I'm not so sure about a Honda Type-R VTEC (with less torque!) though, as it can rev a full 3000 rpm higher than a 1.8T while in the same gear and doesn't suffer from the small turbo power range! Equally, on a say 0-120 mph sprint you will be left for dead by a 1.8T, as it can rev higher, thus equalling out (and outgunning) your torque advantage.

Compare with a Grand Prix car that has less torque than your TDi, but can rev at 18,000 rpm, giving it 850 hp and putting it in another league to your car... (Or anyone's car, really )

So why can a full-blown turbo diesel keep up with a Porsche at lower speeds? Because the Porsche is geared to a top speed of 200 mph. Would you gear the Porsche to a top speed of, say, 140 mph, or give it a 7-speed box, there would be no contest.

Horsepower - or better, specific horsepower (hp divided through the car's weight) - is the magic number that equals out engine torque and engine revs to give you the car's real acceleration power, i.e. its wheel torque.

Then again, the small power bands for turbo engines - whether they be diesels or petrol engines - makes them a lot of fun to drive because of the sudden power surge when the engine revs hit their sweet spot...

FabiaTDI? I may be reading it wrong due to the typesize, but does it say maximum speed is 174 km/h? I make that only 108 mph, which seems a little low for a TDI? - even unchipped. I've had mine (downhill though) beyond 120mph to defy the limiter, which is close to 200 km/h. I'm hoping you can clarify this for me. :confused:

Cheers

Originally posted by devonutopia in this post

FabiaTDI? I may be reading it wrong due to the typesize, but does it say maximum speed is 174 km/h? I make that only 108 mph, which seems a little low for a TDI? - even unchipped. I've had mine (downhill though) beyond 120mph to defy the limiter, which is close to 200 km/h. I'm hoping you can clarify this for me. :confused:

Cheers

The tests were done in 4th gear, so thats 108mph at 4736rpm.

Sorry about the small print, I'll try and sort it out...