AUDIOZ A4

I finally arranged to have my car visit the Dyno on Wednesday this week. I have been procrastinating for ages and all the recent posts incentivised me to 'make it happen'.

I should premise what follows with the statement that "Dyno charts are not worth more than the paper they are printed on" in my opinion. I make this statement because of the huge power fluctuations that are readily apparent between Dynos when comparing cars power levels. I still beleive that Terminal Speed down the quarter mile is a far better indicator of a cars true 'on-street' performance than a Dyno. Especially, when comparing one car to another.

Additionally, this is not meant to be yet another "Which chip is better" post. I didn't swap chips on the day - so this is not about Wett, APR or any other chips. I was only interested in the performance of my own Giac chip. So please take these results for what they are: The results of a Giac Chip with a 2.5" exhaust and front mount intercooler on a B5 A4 1.8 TQ.

With all the formalities out of the way here are the results.

The Dyno run was Conducted on Wednesday 17th December in 32 Degree Celsius ambient air temperature - so far from ideal conditions. Unfortunately I couldn't re-schedule the run (I really wanted a cooler day). But at least I know that the results are worst case hot weather driving results. Things will only get better in colder temperatures.

The Dyno was supplied by Advanced Vehicle Operations and was a "DTS - Dynamic Test Systems". AVO were chosen as they do not tune European cars and have had no involvment in my cars modifications (other than the exhaust system). Therefore, they had nothing to prove to me. No 'manipulation' was carried out - these are raw 'real' numbers as they came off the Dyno.

Fuel was BP Ultimate 98 Ron Octane (My normal daily fuel) ((no octane boosters or special fuels or additives were used))

As you can see from the Graph:

Max Power at the Wheels: 113.1 KW @ 5967rpm
Max Boost of M.A.P kPa: 223.1 (or nearly 18 psi) @ 2958 rpm
Max Torque at the Wheels: 698 Newton Metres @ 3066rpm

The Giac Chip in my car is a 1.1 Bar Chip. Interestingly (and full credit is due here to Lucas and PWR for their extensive development work) the PWR Euroclass Front Mount Intercooler resulted in almost zero pressure loss compared to the stock intercooler. When you factor in the volume of the Front mount intercooler is nearly 3 times that of the stock intercooler this is an amazing piece of engineering! Pressure loss across the PWR Euroclass core is virtually nil. This resulted in some astonished faces at AVO - having espoused the flow capabilities of the PWR as not being 'bar and plate'. What this proves is:

a: The PWR Euroclass Front Mount intercooler flows EXTREMLEY well
b: From the graph it is also apparent that intercooler heat soak even on a 32 degree day is negligable (and non existent compared to the stock side mount intercooler
c: That the PWR Euroclass Front Mount is worth EVERY dollar and probably a lot more.

It is also plainly apparent from the graphs that the humble KO3 runs out of 'huff' at around 5800rpm and its all over by 6100rpm. Reality is unfortunately that the KO3 just cant flow enough air to make more power than this. If I am going to up the ante in the horse power stakes the next step is definately a bigger huffer.

Also of interest is where the max torque is available. At an amazing 3000 rpm! This was the unrequired proof to me why the Giac chip is such a great performer on the street. Having so much torque available from 3000rpm makes it a blast to drive! And I really enjoy the way my car performs. Power delivery is ultra smooth, and if the lure of even more power wasn't so attractive I would stop modding now - being completely happy with the power delivery and characteristics of my car.

<img src="http://www.users.bigpond.net.au/worx/dyno 1.jpg">

<img src="http://www.users.bigpond.net.au/worx/dyno 2.jpg">

<img src="http://www.users.bigpond.net.au/worx/dyno 3.jpg">

xr4tic

Not bad, but like you said, dyno results aren't the most reliable, and without anything to compare the results to....

I think the Nm scale is not right. From the conversion chart, you'd have 516 ft-lbs of torque, almost like it's off by a factor of 3.

Out of curiousity, how did you come up with almost zero pressure loss from the IC? Did you actually measure it?

A400

The graph shows you have over 500lb ft torque which is not even close to reasonable from your setup. 500 lb ft indicates at least an expected level of over 400hp to go along with it. The hp and torque will cross at 5250 if all things are right. I dont think you got what you paid for on your dyno run, but it does bear out what you said at the beginning, most dyno #'s are greatly dependant on the competence and honesty of those who run them and what you want to prove and accomplish on the tuning session. I love dyno's but I find they just help you get the car right, the # they throw can be wrong
Rod
Rod

xr4tic

The conversions don't use the same factors.

ft-lb = 0.73746 * N-m
hp = 1.34 * kW

AUDIOZ A4

Or So I am Told.....

xr4tic

most dynos here you input the gearing, or spin the rollers at a certain RPM to get the speed.

I'm guessing this was a 3rd gear pull then.

A400

I will write my European friends and ask where they cross
Rod

A400

From what I am seeing on KW/NM dyno charts they cross at around 6300rpm which makes things look wrse

xr4tic

If you divide the Nm by the gear ratio (3.889 x 1.029 = 4) it comes out about right.