Melbourne Dyno Day - Saturday April 9th Results:

[vvw747]

Stock MKV GTI

Hey guys,

The dyno day was my first forum meet/event and i gotta say was so good meeting and talking with fellow veedubbers and car enthusiasts so many thanks to all that organized it.

I currently have a stock 2006 MKV GTI and was very surprised to see the results i got... I'm almost certain the previous owner did not flash the car and the only things i have done to the car is changed the cam follower and DV (revision d).

Now forgive me if i sound stupid but how is it possible for a 4-5 year old car with 60k on the clock and stock figures at the crank of 147kw (i think) to loose only 7kw through the drivetrain and over all those ks and years?

Don't get me wrong im very happy with the results but yea just not sure

Here is the dyno graph;



Thanks guys

[Tim]

figure seems a touch too high for a stock car and a touch too low for a tuned car

If you were to log the boost or fit a boost gauge it would tell you pretty quickly if it was tuned or not.

[vvw747]

figure seems a touch too high for a stock car and a touch too low for a tuned car

If you were to log the boost or fit a boost gauge it would tell you pretty quickly if it was tuned or not.

Thanks Tim I thought that would be the case

I've got a vagcom cable with the software from ross-tech that i used for the new canbus install, would i be able to use that to get some boost pressure readings?

If not i have access to a DynoScan unit which im 100% sure can do it.

Im getting the car GIAC tuned soon anyways with the apr hpfp on its way

Also is it possible if it is tuned to know which flash it has on it?

Thanks

[Corey_R]

Yep, I agree with Tim. The figure is about half way between what it "should be" for either stock or stage 1, even accounting for dyno inaccuracy %'s.


Edit: oops. you've posted again.
Yes, you can use VAG-COM to (official VCDS) to log boost pressures etc.
This page is courtesy of APR, but it gives some good suggestions for things within VCDS to log for various purposes of analysing your performance etc, including boost.

As for whether it is possible to know which flash it has on it or not... I believe the answer is no (based on conversations in a USA thread where representatives from both APR and Revo were helping a customer). But I'm happy for someone from one of the tuning companies to correct me on that if I'm wrong

[DNA Tuning]

Experienced tuners would probably know. In the past, in some circumstances when I've backed up ECU's and sent the data to DNA Tuning UK, they've come back and asked "Was that APR or Revo?" or "it's not stock", etc. so they definitely either have a whole folder of data reads from various tuned cars and can tell just by the tune parameters.

Of course, logging the boost in VAG-COM would reveal alot.

[vvw747]

Ok so is this actual number the boost guage would read or do i need to subtract the ambient pressure?

Here is the log for the boost;

G115 F2 G115

Group 115 - Field 2 TIME Group 115 - Field 3
Boost Pressure - (specified) STAMP Boost Pressure - (actual)
mbar mbar
820 0.06 1170
830 0.71 1210
800 1.27 1240
360 1.89 1170
330 2.52 1070
1410 3.12 1190
610 3.69 1200
390 4.27 1090
300 4.9 1040
300 5.47 1040
290 6.06 1030
290 6.7 1030
310 7.27 1020
720 7.85 1020
780 8.53 1070
1800 9.12 1160
1790 9.72 1630
1760 10.38 1700
1780 10.99 1700
1800 11.64 1690
1810 12.23 1670
1640 12.81 1670
1530 13.44 1590
320 14.06 1340
320 14.63 1120
330 15.19 1070
340 15.81 1080
330 16.39 1080
330 16.96 1080
310 17.5 1070

Am i correct in saying 1700 mbar = approx 25psi?

So lets say ambient pressure is 1013 hPa, and hPa = mbar

1700 - 1013 = 687 mbar <-- actual boost gauge reading which is approx 10 psi

I hope i have calculated it correctly i just used my knowledge of pressure learnt from my flight training

Thanks again for all the help guys

[kaanage]

DeanCorp Dyno:

I thought this post was rather interesting.
Did you use the water/methanol injection on the dyno day or was it switched off?

Dean?
(make up 10 chars)

[Tim]

I thought this post was rather interesting.
Did you use the water/methanol injection on the dyno day or was it switched off?

Its no secret that Dean has water/meth. It didnt really have much effect on his power output though from what I understand if thats what youre implying?

[Corey_R]

Its no secret that Dean has water/meth. It didnt really have much effect on his power output though from what I understand if thats what youre implying?

Why? Is it broken? Or doesn't the tune account for it?

[R36FTW]

Meth/water alone if just added to a car with a given tune, no, wont make any real difference in power. However as I understand if tuned for it, it can allow running higher boost, and reduces detonation which means you can program more timing in. These factors equate to more power, and many guys use it before or instead of going to E85. If its dual mapped, you can just turn off the meth injection and run 98PULP which may be what you're suggesting Tim?

[Tim]

no idea. Just saying the car made similar power before the meth than it did afterwards and there are other cars making similar power without it.

[kaanage]

Had a chat with Dean at Prinny Hwy and confirmed that

1. He was running water/meth at the Dyno Day
2. The tune he is running was developed for use with water/meth so it can be more aggressive with boost/timing etc than otherwise
3. The car will make almost as much power on this tune (loses only 3kW) without water/meth but not for long (the ECU probably detunes the car as it senses continual knocking and other adverse effects)

He was very friendly and open about this as a very cost effective tuning option