GT gets Superchipped

[SoVeReIgN]

Cheers guys, thanks for the explanation.

BTW, not upset, just curious.

No dramas - A fantastic example is the 1.8t in the Audi A4 - It was always a 110kw engine, still is in the Polo GTi. But towards the end of it's life in the A4 they upped it to 120 and 132kw with no hardware changes. When chipped they still all produce the same power

[orsegtsport]

So Jaymz what's the verdict after a month of driving? Do you have anything to add about the car's performance that you haven't mentioned already? Fuel economy maybe?

[shadowmaker]

So this all sounds fantastic, but the cynic in me is saying "too good to be true".

So, do the VW engineers know something we don't?

Not sure I understand why "more torque = better fuel economy" either, could you explain that pls? Is it simply because you now don't need to open the throttle as much to make a nice quick take off? What about cruising?

It's the NOx emissions that VW has to deal with. To do that they need to run a bit too rich mixture, use lower CR, use EGR... etc. To optimize torque/power/economy by reprogramming it means that NOx emissions are getting higher with leaner mixture. Leaner mixture means better efficiency due to better burning of diesel.

Gasoline cars can also have more torque by reprogramming, but they don't have better economy as the A/F ratio stays the same (OK, maybe you can make things little more accurate, but that's it). More torque is achieved by adding more air (=boost) AND more fuel.

[Jaymz]

So Jaymz what's the verdict after a month of driving? Do you have anything to add about the car's performance that you haven't mentioned already? Fuel economy maybe?

Good friend of mine is the M specialist at BMW, gave him the keys and he was blown away at the driveability and sheer low down torque it has.
By the seat of his pants he feels its good for 0-100 in the 6's! Its amazing how quick you can make a car go whem you really know how to peddle it.

To me though its not really all about the power, its more about the driveability and i have to say it's really good. I will be putting it on the dyno next weekend so it will be good to get a graph out of it. Cogdoc is putting his on also so it will be good to see what difference mine has over a standard GT.

Fuel economy is always going to be a hard one. I would really like to tell you that its returning 1000klm from a tank around town but that would just be a lie. After doing alot of research on tdiclub its all going to come down to driving style.
The first few tanks i was averaging the same as standard and returning somewhere around the mid 600's. So i can confirm that it really isn't any thirstier under the same driving conditions. With that said though it will definately use more fuel if the boot is put into it all the time.

I am glad to say though after spending some time reading the many pages on tdiclub about economy, that i my last tank has me averaging somewhere around 850-900.
Click here for some good tips on getting better economy
Also i believe that once the engine has a few k's on it will start freeing up and will help with the economy also. My car now has 2500 k's on it and i believe this has helped with the good economy from my last tank, i really can't wait til it has 10,000k's so i can see how good the economy gets!

Hope this has been helpful. I will post the dyno graphs up when i get them.

Cheers,
Jamie

[orsegtsport]

Thanks Jaymz, sounds like money well spent. I would have gone down this route myself (before spending money on suspension and body kits), but I have the DSG gearbox and will be limited to about a 25nm increase in torque. I would get the same power gain, but nowhere near the same torque increase that you got.

I'm very interested in the dyno results though, because I have heard that the GT TDI's consistently produce more power and torque than the figures claimed by VW. I have heard of standard cars producing over 180 bhp and over 360 nm, which means that the gains claimed by the tuning companies may be somewhat overstated.

Still, as you say, it's not all about power, it's about driveability too, and it sounds as though that has been significantly improved....hmmm decisions, decisions...

Anyway, I need to get my panels straightened before I worry about anything else - I had a run in with a rather large member of the local kangaroo population!

[jayjay]

i thought the A4 used the KO3 where as the 132kw engine was a larger turbo? i think i remember reading somewhere that with diesel engines, their efficiency is already quite high due to compression ignition and the only way they make more power is revs and more fuel + boost! :S

[Jaymz]

Thanks Jaymz, sounds like money well spent. I would have gone down this route myself (before spending money on suspension and body kits), but I have the DSG gearbox and will be limited to about a 25nm increase in torque. I would get the same power gain, but nowhere near the same torque increase that you got.

Is the DSG really that fragile? I mean i haven't done alot of research about them, but i haven't ever heard of anyone wearing one out or damaging clutches either.

I'm very interested in the dyno results though, because I have heard that the GT TDI's consistently produce more power and torque than the figures claimed by VW. I have heard of standard cars producing over 180 bhp and over 360 nm, which means that the gains claimed by the tuning companies may be somewhat overstated.

Still, as you say, it's not all about power, it's about driveability too, and it sounds as though that has been significantly improved....hmmm decisions, decisions...

I've heard the power figures quoted by VW are low also and yes if someone was just after chasing numbers then if the DPF is removed i've heard the turbo will support 240HP and also Superchips can supply a map just for power if wanted.

I'm not expecting my graphs to show huge power/torque gains as i didn't ask for those maps but hopefully the graph will show the torque coming in sooner and being flatter through the rev range. Thats where i think the best gains are for us diesel guys.

Even if you got Superchipped and only saw a gain of 25Nm's, it would still be very nice to drive as it will rev quicker, come on boost quicker, have a broader torque band and gain another 20Kw or so.
I would be happy to give you a drive in mine to feel what differences it really has as Its all very well for me to post up here how good it is but i tell you it really has transformed the car and you would not be disappointed if you did it to yours.

Anyway, I need to get my panels straightened before I worry about anything else - I had a run in with a rather large member of the local kangaroo population!

Oh no Hopefully its not to bad

Cheers,
Jamie

[Mischa]

what do you guys reckon? superchip + my exhaust design = gti muncher?

[jayjay]

nice engineering assignment... i like

[gregozedobe]

[img]what do you guys reckon? superchip + my exhaust design = gti muncher?

Almost certainly have better accelaration than a GTI from lower revs, but once the GTI motor gets up to 4,000rpm or so you would have trouble keeping up (until you put the bigger turbo, injectors, intercooler etc etc on yours )

[mrx]

I would be willing to bet it'd be about half a second off the pace (to 100km/h) compared to a standard GTI and about a second off the pace of a chipped one. Still bloody quick for a diesel though!

[shadowmaker]

what do you guys reckon? superchip + my exhaust design = gti muncher?

Why don't you get rid of the catalysator too?

How about that DPF. I mean I know my programmer guy can make a DPF delete, but there really aren't many in the world who can pull that out. Or do you just leave emission warning light on?

[Mischa]

Why don't you get rid of the catalysator too?

How about that DPF. I mean I know my programmer guy can make a DPF delete, but there really aren't many in the world who can pull that out. Or do you just leave emission warning light on?

with an ecu remap im sure you could have it gone no probs.

btw guys i reckon this would absolutely kill a stock gti haha.

gt chipped + intake + full exhaust + port and polish i reckon youd be pushing easily 200 wheel hp. it would just be slightly slower off the line due to the incredibly short gearing.

[SoVeReIgN]

I would be willing to bet it'd be about half a second off the pace (to 100km/h) compared to a standard GTI and about a second off the pace of a chipped one. Still bloody quick for a diesel though!

$50 says it'll be quicker than stock GTI!

[Greg Roles]

just perhaps, in time, we will know...