I’m trying to tune for Catalunya GP. Mechanical grip is always a challenge. I wanted to know if anyone knows a good tune setup at Catalunya GP? My tune the car at entry corners won’t turn in as it should. Exiting out, a little bit of oversteer when getting on the gas quickly. Also on rebounding and bump soft? Need to hit these curbs to get a fast lap time. Appreciate any help.
Thanks
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Not sure what you mean that the car “at entry corners won’t turn in as it should”!!! Is it too much understeer or oversteer per your liking? Are you racing it for the Homologated (R825 PI), or open class (R or P)?
I put together a quick build/tune for the Homologated class (R835, with Stock Restrictor Plate, F315/35R18, R335/35R18, Magnum III [or lightest] rims, stats = 503 HP, 2751 LBS, 43%). Gave it a couple of laps @ Cat GP with Stock tune and found it to oversteer at entry, and, hard to put power down at times. The car is a little bit of a challenge due to its 43% front weight distribution, and, a mid-engine car. I then, put a base tune with inverted F-to-R springs [used F>R], used high Reb (F>R), low Bump (F>R), and the car worked out ok. I set the Diff at 100/100.
Hope this helps, or, gives you some thing to test out for your liking!
PRKid
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Build: PI R833 weight: 2747lbs, HP: 503, Stock Rims, Race brakes, stock driveline, stock restrictor plate, Tires Front: 300/35R/18 Rear: 335/35R/18. Yes oversteer. My lap time with my tune is 1:49’s Trying to get 1:48-47. If I can get the car right. Try that build with your tune and let me know what you get. I’ll try your tune after your results. Thanks! Much appreciate it!
Builds are pretty much identical, I just used up the PI for the Homologated requirements and those particular LBs. I just have additional grip in front with the wider front tires.
I forgot what I ran, forgot to jot it down, I was simply trying to figure out if the car would be drivable in way to hotlap it properly and ability for some good laps. Might give it another run when I get a chance. I was just providing some hints on potential settings that you can test to improve your tune, not necessarily that you need to try my tune (which I do not have tune room for anyway) based on lap time, which as we know, it all depends on the Driver.
PRKid
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What do you mean by that “inverted F to R springs” the slider you reversed them from default?
Thanks.
Nothing to do with the settings Slider, or Default spring settings.
Basically, since the front weight distribution is 43%, meaning less weight in front…thus, potentially less front springs setting value versus the rear. Thus, I am doing the opposite (by using a higher spring rate on front versus rear), for this particular car/build/class. I only do this for certain combos of car/build/class. For this mid-engine car, these springs settings will help with the oversteer during power-on.
During entry, the oversteer mentioned by OP is most likely due to Diff (Decel).
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Are you racing via Free Play or Rivas (R-class)? Thx!
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Free play. Gotcha. I’ll go with a higher springs setup in the front and lower in the rear. I’ll try your settings you mention here. Thanks again!
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BTW, I am sure you’d probably know, but, TX3 Shelby has a R835 PI (Homologated) tune shared which you can give a try. He ran it for #9 WW (1:45.662, using Auto assist). Top RSR is at 1:45.250 (Homologated). Top w/o assists is at 1:46.830 (tuned by RBR Venom).
I ran a quick several of laps in the base tune for a 49.4 (NO assists).
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Tuning the Porsche is actually very easy. I’m making a realistic tune for it, but here’s a few tips for you.
Max out front springs, front Anti-Roll Bars & Front Rebound damping & slowly tweak from there.
Min rear Anti-Roll Bars, Soft Rear suspension.
Max out both Acceleration & Deceleration on the diff.
Move brake bias slightly towards the front.