08 June 2015

DQ200 (DSG7) - VW Jetta 1.4 TSI

I have written about the DSG7 discovery previously.

Part 1
Part 2
Part 3

Even though it is DSG7, but the car in question is a Malaysian VW Passat 1.8 TSI.
Those few article helps in clearing doubts about the DSG7 but on the Passat 1.8 TSI.

Now I would like to take an opportunity to share about DSG7 mated to a Malaysia VW Jetta MK6 1.4 TSI which seems to be gaining popularity.
In this post, I've shared that I am now running 177HP and 270NM of torque to the wheels.
This easily exceed the supposedly known 250NM torque limit.

For easier reference 
RED is stock power figure.
BLUE is new power figure.

I've have been running with this power figures for about 1.5 months now. In this 1.5 months, I've been to the track, gone on some B-roads drives, high-speed drives and the usual daily grind and everything is still holding up very well.

A complete scan of my car controllers shows a clean bill of health. Even the DSG7 clutch reading shows that everything is working fine.

Even though the period is just a short 1.5 months, I've just wanted to share what is my personal experience thus far and let people judge themselves if the 1.4 TSI / DSG7 combo is as fragile as what people (usually non-owners) claim it to be.
Nothing beats hearing from an actual owner directly.

For information sake, I've use the following fuel type:
Petron RON95 - Nov 2012 to August 2014
Petron RON97 - September 2014 - January 2015
Shell V-Power Racing - Febuary 2015 - current

This car is still being daily driven at the moment and its now clocking 80k km.

07 June 2015

Software upgrade - Projec'A Stage 2 Map for VW Jetta 1.4 TSI

What good is a hardware if there is no software to make full use of it?

As mentioned here, the car have a hardware upgrade done to it. Now since there is a hardware upgrade done, it is imperative that the software be upgraded to make full use of it.

So I turned to my usual tuners, Project'A for the software upgrade portion.
After much discussion with them on my requirements and expectations, we got to work.

For the first step, it involved taking the existing ECU file for a base reading.
But before that, the ECU needs to be taken out from the car.

The placement of the car ECU is as below.
Once the ECU is taken out, the base reading will be done.
This is how the ECU looks like with its covers off. 
With the base readings, the team at Project'A then proceed to work on setting the parameters according to my requirement.
Lets just say they work smart and fast. Overnight, they completed the necessary parameters and the next day, it is ready to be loaded to the car.

Met up with them again and they then proceed to load the new parameters to the ECU.
Once the entire process is completed, we proceed with some adaptability test.

With my butt dyno, I can feel that the car has much more mid range to top end power now and the car accelerate much better then before. The mid range (3k-5k rpm) acceleration was superb. There is no need to go down a gear.

The next step of course is to get the car on a dyno machine to prove what I've felt with my butt.
And wait for it.....
RED is stock.
BLUE is with Project'A.
So the dyno pretty much confirm what I felt with my butt.
The new map has a peak 22HP / 34NM gain over the original map with the bulk of the gain in the mid-range section, the section that will be used most in our daily drive.

The mid-range section (3k to 5k) rpm now is very much better. Personally this is how the car is supposed to be direct from the factory. 
On the original map, I need to downshift a gear or 2 in order to gain some urgency in acceleration. With this new map, most of the time, there is no need to go down a gear to get the same urgency, even on the super long gear 7. All you need to do is to give it slightly more throttle and the car will go.

Apart from the huge improvement in the mid-range portion, the top end also felt livelier. Previously if I am to rev beyond 5.5k rpm, the car don't really pull as it is already at its limit of the power out put.
Now with extra 22HP gain in towards top end, the car is now more eager to go. The top end no longer feel like you are wasting fuel for nothing. 
And lets just say, with the extra 22HP going to the wheels at the top range, the speed that you can reach is quite fascinating. Not super-car territory but more than good enough for a 3-box family sedan.

So like a certain tagline, you gotta "Drive it to believe it".

It's time for the million dollar question, why is the HP/Torque figures "low"? 
Why is it not 195HP or 290NM of torque? Is this tuner not good in tuning?
The answers to all the question above is because this is exactly what I've specified to the tuners. I am not chasing for peak figures. I am going for drivability and they get the job done to my expectation.

If you want peak figures, they are able to get it done for you. I have no doubt about it.
Just bear in mind this, with higher output, the stress on your engine internals is higher too and don't forget about your dear friend, the DSG7 gearbox.

As for me, I am happy with what I have and yes, my 1.4 TSI engine and DSG7 gearbox is still fine, very much alive and kicking, if you all want to know.

P/S - Question about warranty will not be entertained.
PP/S - Fuel consumption question will not be entertained too as FC is in direct relation to how heavy your right foot is.

06 June 2015

Some hardware upgrade

The modification bug bite a couple of months ago and there is a pressing need to scratch it.
So scratch it I will.

This modification involved killing the cat.
Yes. Cat.

I killed the cat here.
Of course I've pre-order my downpipe a few weeks before hand.
I highly recommend Jian Hang due to Ah Wa superb workmanship.

This is how the original factory catalytic converter looks like.
How the engine looks like with the factory catalytic converter removed.


I junked this restrictive factory catalytic converter into a custom after-market downpipe.
A comparison of the factory catalytic converter and the aftermarket downpipe.
Now what is the difference after swapping to an aftermarket less restrictive downpipe?
Frankly speaking, you won't feel any difference but this step is required if you are to enjoy the full potential of the software portion.

Hehe.
Stay tuned.