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12-26-2020, 04:10 PM | #15 |
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Those rates seem pretty excessive. I'd drop down to 400lb springs F&R to start. Maybe go to adjustable swaybars and use those, and damping adjustments to dial in the balance of the car.
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12-26-2020, 04:17 PM | #16 | |
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Thanks! Yes you are right, they did help me interms of alignment settings and the car tire wear with a pyrometer was perfect and on point. They have given me the ride height which i am using at the moment , 2 mm lower than where i had it ( nothing has changed ) Settings , 1 click does not make a difference even 2 or 3 , something is definitely wrong with this. lets compare 2 different settings , theirs and mine. Their setting F Compression 6 F Rebound 10 R Compression 6 R Rebound 8 My settings F Compression 1 F Rebound 6 R Compression 2 R Rebound 6 I have had 7 tenths quicker in a mid 1 minute track on my settings. Last but not least , the car is bouncy in the front only which is a vague term whenever i have someone ride with me someone says its too stiff others say yes its bouncy because its soft. Very difficult to say. What i feel is the front reacts differently from the rear on a given road surface or bump + series of bumps. When i get 1 big bump or ride a curb its perfect, however multiple bumps the car has an excessive pitch in the front like it cannot absorb all the damping. I have a feeling its a valving issue but how is it possible to prove to a " high end coilover manufacture " when their answer is " we have never had this problem before " |
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12-27-2020, 04:30 AM | #17 |
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I would try softer springs, something like 8k 10k (450, 550), anyway never heard good reviews about those tires, I would use Direzza, 71r or PSC2 instead
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12-27-2020, 03:36 PM | #18 |
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12-29-2020, 11:29 AM | #19 |
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Your spring rates are not too stiff, but it does seem like you bought european and/or japanese coilovers that are meant to run on butter smooth surfaces/track and only hit a curb once in a while (and a mild curb at that), but are running rather bumpy racetracks. Thats an important detail when choosing coilovers that a lot of people skip over. My wild guess would be that you got JRZs? I've ridden on one car with their pro1 here and on a bumpy track, they did not feel better than my way cheaper "taiwan rebrand" (as some like to call them) coilovers.
One thing though, you havent provided any video, and this might help. Some coilovers feel like the car is bouncing all over the place and that you would spin out if you stepped hard on it on corner exit or that it would understeer madly if you entered the corner faster, but is it actually the case? What you feel from a bounce indicates what the chassis is doing, but if your tires are keeping contact with the road it might not affect traction/balance as much as you think. Quick edit: no way in hell a coilover alone is responsible for 3sec a lap on a 1min track on the same tires. My guess is that you are underdriving the car because you do not trust how it feels, and are driving much more assertive on the porsche since you do like how it feels. |
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12-29-2020, 03:11 PM | #20 | |
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Try using a tire designed for the type of spring rates you've chosen, or lower the spring rate to match the tire. Pitch, squat, and roll are not detracting from grip, and can be exploited. Look at how much body roll F1 cars have, when they have THAT much downforce and THAT little weight. |
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12-29-2020, 03:13 PM | #21 | |
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Have you considered hiring a local pro to dial in your dampers to the best of what is available within the current equipment? I agree; something is not right with your setup. |
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12-29-2020, 04:15 PM | #22 | |
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12-29-2020, 04:22 PM | #23 | |
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Hitting 1 big curb is fine however the car has excessive pitch at low speed compression is what i came to find. The best setting on the road for it to ride ok but still very jerky , Max compression and lowest rebound. Video attached, you can see how the car tends to lose grip , i am under driving the car indeed as you said because it does not have a clear tendency , it understeers or oversteers on the same corner and input. Last edited by supercharged680; 12-29-2020 at 04:55 PM. |
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12-29-2020, 04:23 PM | #24 | |
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Video uploaded, look what it does on the smooth long straight and how it suddenly loses grip |
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12-29-2020, 08:06 PM | #27 | |
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Try backing all settings off to minimum, and see how it behaves. Consider flying in a qualified pro to test and set up the car. |
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12-30-2020, 02:47 AM | #28 | |
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Their setting F Compression 6 F Rebound 10 R Compression 6 R Rebound 8 My settings F Compression 1 F Rebound 6 R Compression 2 R Rebound 6 I have had 7 tenths quicker in a mid 1 minute track on my settings. I felt more confident pushing the car but its still not where i want it to be, i will be uploading a video of me driving a GT86 cup running Tein SRC suspension and the car felt GREAT! |
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