Anyone out there that has experimented with 3/4 front vs 4/4 front aero?
I have been learning the car full stock for a few days and now moving to track camber and going full aero.
Running on street tires. Just curious about any real world advice on the front setting.
Thanks.

P.S. on stock aero running 130ish on front straight; 3 turns with lowest speed in the mid 80s - average track speed 75mph

 

At those speeds, it probably won’t make much difference. When I spoke to Manthey at the Ring, they advised against full front downforce, since the car gets loose at the very high speed corners there. Of course this is also with their recommended alignment and ride height specs (including rake) that can affect this too.

With those settings, the rear downforce in 4/4 doesn’t quite keep up with the front at 4/4, in terms of high speed balance. With 4/4 in front, this probably works better with the bigger Manthey rear wing (or at least Gurney flap).

I am personally leaving mine at 3/4 front and 4/4 rear, as per Manthey. Although on slower tracks like mine and yours, it’s probably a very subtle difference.

Most decent drivers are comfortable with a bit of low speed oversteer, but only excellent drivers can really handle any high speed oversteer. For the average guys, you can tweak swaybars or alignment for low speed balance and err on side of rear-biased downforce for high speed sections.

I would start at 3/4 front, 4/4 rear and adjust later if you feel like you're getting push at high speeds (doubtful). With my 991.2 GT3, I had to adjust swaybars for max oversteer for my preferred balance. With the 992, I leave bars in middle and aero as above and couldn't be happier with balance.

 

Thanks Grant - appreciate your comments. You talked me back into the 3/4 front - which, if I am keeping up here, means i get a bit less downforce on the front end but that's ok b/c at 100mph turn entry that probably better matches the rear downforce - with a little less stick on the front biasing toward understeer.

I am finding that this car has plenty of power to correct a little understeer by rolling on...prefer that to having the back come around on me. But as I am getting faster I am spending more time loose in one way or another and really noticing tire pressure when its not dialed (or when im hot). My learning curve feels pretty steep at the moment - but my times are moving to a good place

As an aside I was quoting average turn speed. Where I think / expect to get the mechanical advantage with more down force are those same three turns where the entrance speeds are 100+. Reducing the need to scrub a few MPH at apex and increasing exit speed. <<< Does that make sense. These are my areas of biggest opportunity as I balance the tend to over cook in, slide around and exit inconsistently.

Thanks!

 

Yes, think we are on the same page

You can always move to 4/4 front later if you feel the need (but I don’t expect that). I hate understeer and I’ve never driven a car with less understeer than this one.

 

3/4 No More

 

I love a good rhyme scheme to remember things...

• Aero 3/4 no more.
• Turn 4 to the floor
• start to drift don't lift

 

I've been running 4/4 front and rear. On the two tracks I frequent around here I'm at 200kph at the end of the straight braking down to 130-150kph for the immediate corner or sweeper that follows. I'm not taking any high speed corners at 200kph+ where I think these settings start to make the most difference. As Grant mentioned, I think the impact is negligible for the speeds I'm going. If the rear steps out on me it's because I wasn't properly trail braking or was too aggressive on turn-in yanking the rear around. It's more driver error than the difference between 3/4 and 4/4 on the front.

That is just how I feel with my current setup. I also don't feel the rest of my car is 100% where I want it so this all could change as I keep tweaking alignment, rake, ride height etc to get the feel I want.

JJ

 

Well said.
I have some good data logged with no aero.
Will be interesting to compare apples to apples same driver/track/car.
At the end of the day Im still slow...and the beers are still cold

 

I am in the exact situation! Have been running on low downforce and have drastically improved my times (I am still slow compared to the fast guys haha). My local track is similar. About 145-150 down the straight, couple of 100+mph entry corners, couple of 80+mph.

Did you run 3/4? I want to feel out the high downforce settings myself and was leaning 3 on the front and 4 on the rear. How did it feel?

 

I went full and will not go back.
I was running 1:45s. First day with track alignment and full aero I dropped to 1:43 and this last Thursday low 1:40s.
The downforce has let me enter faster, feel more comfortable carrying speed in the two big corners and here is something interesting (to me)....
the first session my top speeds dropped. Now i just hit a new best. This isn't something I focus on. But I am carrying so much more speed into my straight that I am back to same speed as no aero.
I am an intermediate by any measurement....but I am running within a second or two of the fastest street cars.
Its been really fun learning this car. Im an addict.

 

This is great feedback! The two fastest corners on the track I run are about 105-115 (I’m around 100-105 the quicker guys go through around 115). So doesnt seem fast enough to worry about the oversteer Manthey mentions on the 4/4 setup so I prob am good to go on the full downforce setup front and back. Will text it out Wed & Thurs and let you know! Thank you for the feedback!

 

Have fun with it. I agree that these impacts are fairly minimal at most track speeds (and laughable on the street). At 4/4 if anything I am getting oversteer (noting my front camber is less than back). But its actually dialed in for me - love my current set-up. Looking forward to your report. Be safe.

 

Ran Wed and Thursday with the high downforce settings (4/4) and WOW. I set a PB and knocked 2s off my lap times. I averaged 8-10mph faster through the fastest corners on the course. Not saying it was all aero but it was definitely enough aero to sky rocket my confidence. This car is absolutely incredible. I have 6 track days on it now and it keeps getting better.

Thank you for your feed back. I love that we get to make these adjustments on these cars right out of the box. It saddens me that so many people do not appreciate how spoiled we are with the ability to do this.

 

Love hearing this. Couldnt agree more.
But, seeing this picture now I think some of what you are experiencing is that White is a fastest color.

 

Clearly race car spec 😂