Polo Dyno Day - 9th August!!

[GT3]

Peak power means little if it's a sharp peak.

Couldn't agree more, although that's what ppl usually quote

Dave described it best when he mentioned how his car hit peak power relatively early and was able to hold it across the rev range. That's the difference you want to see when you add mods, rather than unusual peaks and spikes. That said, Sam's power curve looks pretty decent too..

EDIT - when I mentioned variation in base dyno figures, I meant generally, not those that attended the dyno day, for instance, my base was between 116-120.

[VW GTI]

Here's Dave's and mine on the same graph.

[DaveMack]

Remarkable similarities, Sam. I'll have to get a zorst now ...

Dave

[VW GTI]

Yeah, the gains are pretty much all through the rev range, almost the same the whole time except at about 4000-4500rpm but then it picks back up again.

[GT3]

Sam, notice how your peak begins to drop off around 5300rpm, ..that's pretty common, as boost begins to cut-off. A high-flow muffler would give you more slighty more power, and would hold power longer, bc when the exhaust is running at those speeds, the stock muffler will begin to choke flow. That's what my testing confirmed as well. How this translates on the road (I mean track ) ...with the stock muffler, your car will slow down at 160kmh, with a high-flow, it will pull strong to 200kmh.

[DaveMack]

Sam, notice how your peak begins to drop off around 5300rpm, ..that's pretty common, as boost begins to cut-off. A high-flow muffler would give you more slighty more power, and would hold power longer, bc when the exhaust is running at those speeds, the stock muffler will begin to choke flow. That's what my testing confirmed as well. How this translates on the road (I mean track ) ...with the stock muffler, your car will slow down at 160kmh, with a high-flow, it will pull strong to 200kmh.

Quite right Neil, ... I saw Eddy's and it doesn't dip at the 5,500 mark.

Dave

[VW GTI]

Quite right Neil, ... I saw Eddy's and it doesn't dip at the 5,500 mark.

Dave

Eddy's actually seems to dip more at 5500rpm but then it goes up again and drops again.

Blue is 'stage 1' and red is 'stage 2'

[DaveMack]

Eddy's actually seems to dip more at 5500rpm but then it goes up again and drops again.

Blue is 'stage 1' and red is 'stage 2'

Damn ... so it does. Whose was I thinking of then?

Dave

[VW GTI]

Damn ... so it does. Whose was I thinking of then?

Dave

Maybe backyard bandit (Jason).

But his dumped fuel in like it was a Veyron - without the other benefits

[GT3]

Eddy's actually seems to dip more at 5500rpm but then it goes up again and drops again.

I wouldn't read too much into that dip, Polo GTIs are notorious for doing that on dynos. His car still manages to maintain peak power at 6000rpm...