The Engine's in the Wrong Place - #5 Porsche 911 RSR

[Spiny Anteater]

Back to R3 Class agin with the random cars - that old random.org site Serial suggested sure does like it's high numbers judging by all the R-Classers I've run lately.

This time it's the turn of the #5 R3 Porsche 911 - that's the Xbox one. Now if it was possible to paint R-Class cars how many people do you think would add an RROD to it?

I've actually been quite lazy with this one, and am only really running one tune apart from gears and aero changes between tracks. So, I'll post one up later but it will be a high downforce tune as that's what I'm running on all tracks except the speedways (Nissan and Motegi, both minimum d/f) and Sunset Peninsula Short where I'm currently liking the cars better with 50% of maximum d/f rather than just running at minimum. Despite that, the car is running well.

And by well, I mean that it's got a better QR, FR, TR and PR than the NSX, although it is slower than the NSX on a few tracks (and equal to the thousandth of a second at Maple Valley Short). It's generally showing a lot of promise, and while it doesn't seem to be the equal of the Vipers or Ferrari, I think I can shave a few seconds off my overall R3 time using it.

It took a while to work out why it was slower than the NSX on some tracks - there didn't seem to be rhyme nor reason to the tracks at first. And then it clicked! This car really does not like turning over a rise, in fact it really, really hates it. The front end just goes extremely light (not surprising with the engine over the back wheels) and it tries desperately to understeer off the road. However, this is easily the tamest 911 I've run. It was especially good fun at Laguna (usually a track which annoys the heck out of me) as you can really thow it into the corners and then as the back comes around (it doesn't snap, just edges around in a surprisingly predictable manner) you can get on the power incredibly early and floor it out of most tight to medium corners (as long as they're smooth!).

So, that's the current project. Doesn't look like I'll be moving up the overall leaderboard for a bit yet

[Spiny Anteater]

For this one I've only really developed one tune. For the most part I've run it with maximum downforce, although I ran with no toe and minimum d/f at the Speedway and with 50% of max d/f at the 'Ring and Sunset (also plan on doing this at Motegi Short too). Soo far, it's putting the NSX in the shade, nowhere more so than at the 'Ring where it has dipped below the 7'10" barrier. Of course, I knwo a fair number of you are faster than that...

Still, the tune:

Tyres: 28/28
FD: 4.20
1-6: 2.88, 2.10. 1.63, 1.32, 1.14, 1.04 (Maple Valley gears)
Camber: -0.8/-0.7
Toe: 0/-0.2
Caster: 5.4
ARBs: 19.89/21.20
Springs: 338.0/378.1
Rebound: 5.9/8.3
Bump: 3.2/4.2
Aero: 198/463 (max)
Brakes: 48% Front/110% pressure
Diff: 40/24

Benchmarks:
0-60: 3.480s
0-100: 5.850s
Top Speed: 171.4 mph
60-0: 85.0ft
100-0: 217.9 ft
g's @60: 1.39
g's@100: 1.60

[Spiny Anteater]

Just drawing attention to the presence of the tune

[larryCR]

I'll be giving it a try fairly soon, I hope. I have a bunchy of R3 times that were just laid down to get some tracks posted. So I shouldn't have much trouble bettering myself.

[Spiny Anteater]

If you don't get on with this one, here's a tune for the @Ring from Placard Rat:

http://forza-tuning.net/index.php/topic,553.18.html

Of course you'll have already seen this one though since you have some times later on in the thread. It looks to me from the description that Rat's tune may be easier to drive than mine - or maybe it's that I just can't resist getting the back end out in this car

[Spiny Anteater]

It's taken a while, and this one is finally done. And I decided to see how the QR stacks up against the total time for all the tracks.

So, I took the proportion of the 911 QR to NSX QR, and multiplied by the NSX's time.

This predicted a time for the 911 of 1hr 6min 26s.

What I actually ended up with was 1hr 6min 20.363s - not spot on but close enough to suggest that the QR is a good predictor of times. If I get bored I may compare some of the other times and see just how robust the QR is.

As for the car, I can't really complain. It didn't dominate the NSX, despite being 15seconds slower overall. That can be explained by the stats. Although the 911 has less power, it also weighs less so generally accelerates better (the engine over the back wheels would be a factor I expect). But, it is worse than the NSX under braking, handles similarly and front end goes light over bumps and crests. That was a real problem on a number of the snakes where the poorer brakes and light front end caused problems. There was also the huge co-incidence of getting exactly the same time (to the 1/1000th) as the NSX at Maple Valley Short.

I would conclude that this is a marginally better car than the NSX (it's faster on 38 out of the 52 tracks and equal on one), but the gap between the two is such that I do wonder if it may just be fully explainable by a tightening of the nut behind the wheel.

[larryCR]

Maybe you should pull out the NSX again and see how they compare when the driver's state of tune is about equal.

[Spiny Anteater]

Good thinking, so I re-ran the Suzuka West Time Trial last night. The end result was that I finished 0.045 seconds down on my previous best, so it looks like the nut is as loose as ever. Certainly, I don't think I can say with any certainty that the improvements with the 911 are down to the driver - I think it's more likely just a better car.

I'd like to say that it proves how consistent I am that I can run the car so close... but both laps looked unbelievably scruffy. But it seems that I can't get a good clean lap on this one