Fiesta ST180 - Dyno'd

[Danmorris94]

Got my Fiesta dyno'd at the weekend at Circuit Motorsport right by Castle Combe.

Completely standard, always warmed up before giving it the beans and allowed to cool after a hard run, only fed V-Power.

The guys running the dyno couldn't believe it was standard - was higher than I was expecting, but I'd forgotten about the overboost function.

223 bhp engine
198 bhp wheels
221 lbft

[s m]

Bet that's pretty lively

I went in one a couple of years back and was impressed by how spritely it was

[JoeMarano]

Surely a mountune must have somehow found its way onto the car? As that's way higher than it should be!

[LuS1fer]

I don't trust the accuracy of dynos, personally, as I've seen some cars with very odd readings.
Fine if you use the same dyno to gauge any gains but, in absolute terms, I am not persuaded they are wholly accurate.

[JoeMarano]

Found this interesting..

http://www.topgear.com/car-news/hot-hatch/hot-hatc...

[Danmorris94]

s m said:

Bet that's pretty lively

I went in one a couple of years back and was impressed by how spritely it was

It definitely goes alright! Great fun to drive!

[Danmorris94]

JoeMarano said:

Surely a mountune must have somehow found its way onto the car? As that's way higher than it should be!

Tell me about it! 100% stock I'm the only owner since new!

[Danmorris94]

LuS1fer said:

I don't trust the accuracy of dynos, personally, as I've seen some cars with very odd readings.
Fine if you use the same dyno to gauge any gains but, in absolute terms, I am not persuaded they are wholly accurate.

Agree with what you're saying, I'll be using this dyno after mods to get accurate gains from mods.

[tonyb1968]

It looks like the calibration on the dyno is out, a good indication is where the bhp/torque crosses, it should be 5250rpm on a petrol, thats definately much closer to 5000.
As a reference and if you use the same rolling road ONLY, its not a bad starting point, use a different rolling road or different type of rolling road and it could well change drastically.

As an example, I use to run an STI Spec C, JDM map only with a panel filter, Bosch rolling road, car ran between 312 and 316bhp, sold the car, it then had a UK fuel map which just adjusted the timing for UK fuel, saw that car 5ish years later and it ran 312bhp on the same rolling road.
Indication of a perfect reference point using the same rolling road

Just dont be depressed if you go to a ford ST owners day out on a different rolling road and dont get the figures you had before.

[Danmorris94]

tonyb1968 said:

It looks like the calibration on the dyno is out, a good indication is where the bhp/torque crosses, it should be 5250rpm on a petrol, thats definately much closer to 5000.
As a reference and if you use the same rolling road ONLY, its not a bad starting point, use a different rolling road or different type of rolling road and it could well change drastically.

As an example, I use to run an STI Spec C, JDM map only with a panel filter, Bosch rolling road, car ran between 312 and 316bhp, sold the car, it then had a UK fuel map which just adjusted the timing for UK fuel, saw that car 5ish years later and it ran 312bhp on the same rolling road.
Indication of a perfect reference point using the same rolling road

Just dont be depressed if you go to a ford ST owners day out on a different rolling road and dont get the figures you had before.

That's an interesting one, never heard about the specific torque/bhp crossover! I'll be definitely sticking to the same rollers as they're so close to home and affordable so that won't be an issue. Appreciate the comments, and I completely agree with you!

[poppopbangbang]

tonyb1968 said:

It looks like the calibration on the dyno is out, a good indication is where the bhp/torque crosses, it should be 5250rpm on a petrol, thats definately much closer to 5000.

No it should be 5252RPM on anything regardless of spark or compression ignition as power=torqueXRPM/5252. However the curves on a plot will only cross at this if both axis for power and torque are scaled the same which in this case they are not. As calculating power from torque is a mathmatical function poor load cell calibration will not show by the curves crossing at a different point.