Where in the southern hemisphere is APR gather test data at -10 to -20 degrees Celsius (14 to -4 fahrenheit)? because that’s what we see in the colder times up here in the northeast (in the NY/Chicago/Toronto triangle). That’s where Flying Tomatoes lives, yes? PA?
I’m pretty comfortable that cars in Australia aren’t seeing anywhere near that. Maybe if they took a ferry down to the southern tip of New Zealand.
Here…let’s do a little geography experiment.
See that? That’s Australia. See the red thing? That’s APR Australia near Brisbane. See the dashed line running through the picture? That’s the equator. It rarely gets below 40 degrees in Brisbane. Record low is 30 degrees and that was in 2007.
A boost curve between the B8 S4 and the 4.2L FSI with our calibration is not similar in shape. If you look at the B8 S4 curves available, you’ll notice they rapidly increase towards redline. It’s the opposite on the RS4. Manifold pressure towards redline decreases.
No
I don’t think that’s a very good idea. These are the same people who moments ago you were saying don’t really understand anything. Now they need to make assumptions based on more data? Yikes!
I have a tough time as it is trying to explain why one dyno type may read differently than another, what wheel horsepower is (IE, why did my car put down 300 HP when audi says it makes 420 HP), and more.
Likewise, every time I post a drag strip I have to explain why reaction time doesn’t matter. Every single time. lol
One of our dealers testing our supercharger systems is on the southern tip of Australia, in Melbourne. On the Map you posted, it’s near the lable that says “VIC”
The boost curve has nothing to do with the boost gain in colder conditions…besides you referred me to the info to point out BOOST GAIN between summer and winter specifically. This was to support your correction argument, remember?
I’m over the dyno debate because your talking in circles.
Without reading completely what was posted, I’m actually inclined agree with Arin on this. Posting more information will satisfy a larger demographic. Be it the person that faps off on dyno sheets. Or quarter mile. Or 0-60, 60-130, or whatever else.
We’re all a segment of said demographic. There are even things that appeal to us individually. But that said, AR members are a niche of a niche.
The more angles are provided, the better the picture.
More people care about crank power than dyno power than quarter mile.
For me, I’m somewhere in the middle between dynos and quarter mile. I’m a road course guy. I have a different focus than just straight line. But I don’t discount it. I like to know the shape of the dyno curves and the spaces between stock and modded. Numbers are more relative (all numbers really are).
It’s key to realise that nobody said not to show dyno charts.
Euroswagr was making fun of the dyno dorks who get more out of reading a dyno sheet than actual performance. In fact they aren’t even dyno sheets they’re dorking out on…they were fed a peak WHP number, on a 104 tune.
Then Euro was saying he didn’t agree with correcting dyno data . So you’re not really agreeing with Arin, because Arin didn’t really read what EuroSwagr said. I agree, I don’t like corrected dyno data, because when it’s in a shitty environment like hot Alabama we hear what the corrected numbers are. When it’s in a cold climate, we hear what the uncorrected numbers are ‘he’s seeing 600 blah blah blah’. Pick a standard, and stick to it. Either correct everything, or correct nothing.
I like seeing everything. 1/4 mile, PBOX, races with known cars, and even the dyno (although I don’t get much out of the dyno sheets knowing they can be easily manipulated)
You cannot compare a totally different, smaller displacement engine to the larger RS4. It’s not a 1:1 comparison. If the S4 makes 14 PSI here in the summer and 16 PSI in the winter up north, it does not translate to the RS4 making 14 PSI here in the late fall and 16 PSI in the winter up north.
Also, the 2.5 PSI number you’re quoting is from comparing hot summer weather to cold winter weather. The figures I’ve shared thus far were from late fall.
No one is saying it’s an equal 1:1 comparison. We are using it as an example because YOU brought it up. The true answer is you may have no clue how much more boost we will see if it’s say 10degreesF
I’d absolutely agree with this. However if you work for APR. Maybe don’t use cars like Honda as your reference point in any example. I would hope the experienced people at APR would have a wider range of examples that lend more to relevant cars.
I’m here to share data and discuss this platform and others as I have for a while now. However, that’s becoming difficult because I feel some of you are just arguing to argue.
Case in point, let’s use your quoted text above. Yes, people are saying it’s an equal 1:1 comparison otherwise they would not have said it. No one would take my example and use the absolute result as a 1:1 comparison if they didn’t believe it was equal. That is unless they’re just arguing to argue, or arguing something they don’t fully understand.
With regards to knowing how much boost pressure will be present in the intake manifold at a different temperate, we and anyone else can use physics to derive that answer. However, you’ll need more information than just temperature alone.
No lose situation with either of them. JHM and APR have both showed success with their previous kits. I will be upgrading in the future, but first come the full assortment of light weight parts ;D
Once again, we haven’t been given the information, so people are guessing. That’s what happens in a vacuum. We make guesses. You’re also giving information that would backup what people are guessing.
You said the car makes more boost and power in colder temps (than in the 55 degrees or so your dyno’d it in the other day)
You referenced the B8 S4 which we know picks up 2-2.5 PSI in cold temps vs. warm.
You referenced the 600 whp car in Pennsylvania and explained it away with this B8 S4 comparison
You showed 14.5 PSI in Alabama this week (around 55 degrees is a good guess of ambient temps, and your dyno should know that)
What do you want people to say? We’re asking you for information which you’re not giving. You do ‘cold’ weather testing in Australia. Basically it sounds like you have no data on how much boost the cars will see in the cold climates. If the car were to pick up 1.5 PSI (not absurd) that would see you hitting about 16 PSI. If it is picking up 2.5 its 17. If it’s 1.0 PSI it’s about 15.5.
This isn’t hard lol. People are just putting together what you’re telling them. Tell them what it IS if you think they are wrong.
I realise the new tuner has this philosphy that boost isn’t something relevant, but I’ve got news for you…not everyone thinks like him. If he wants to try to swamp the forum with ‘knowledge’ much of which is a smokescreen, it may work great on audizine, but it won’t work here. The Audizine guys all just nodded their heads and walked away thinking ‘wow he’s smart and I don’t need to know about boost’. The guys here know better, and persisted. Now we know. APR runs 14.5 PSI boost on the kit in whatever configuration/tune that was (you never told us) in the picture from this week. We also know that may not be the whole story.
