I’m trying to setup this beast for S Class but I’m having problems with the suspension. When powering out of a corner, like the last corner on Monza the front end will lift and upset the balance of the car and make it buck like a wild bull? How do I even that out? I suspect that I have to tighten up the suspension and especially the rear but I don’t want to make a stiff slippy slidey mess.
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I took it for a quick spin (your build that is!) and you are correct about those darn wheelies…anyway, to your tune & build:
Build:
If you decide you really need the max front width tires, then, you can still save 5 lbs (for you, metric, 2 Kg) by using the lightest rims and 20" rims.
For Monza (per your post), I’d suggest adding more POWER and reducing the width of the Front Tires to your comfort level. I’d go MIN.
Tune:
Your springs are (a) too soft, and, (b) the ratio of the front-to-back I’d recommend you increase. You are (for this car) at 1.07 (i.e. 78.8/73.5) to about 1.3 to 1.4
You can almost double the Rebound values, these are very low.
Try adding about 20 Kg to the front springs, and, 25 Kg to rear.
I put together a build as yours (keeping the fronts widths at max, yet, saving the 2 Kg), with a base tune, and, was able to decrease the Monza Full time by 5 seconds.
One more thing…you did not mention Aero…I’d suggest somewhere min-mid (F) and mid-max (R).
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I put together another tune (for Monza’s speed) which I ran 2 secs better than the grip tune I had mentioned above @ Monza Full. If you’d like to try it out, I can share it for you to DL.
Let me know how it works out for you. Basically your (1) springs are too soft [especially front], and. (2) increase both F&R rebound…that is for your build setup “as-is”. Or, (1) reduce weight to current build slightly, or…rebuild for speed.
Everything else stock. This setup is like on rails for my driving style. I guess it’s more of an allround tune than a speed tune as I guess there’s other tunes out there with higher top speeds but I’d say this can hold it’s own and got great handling too.
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GREAT, I am glad that you got this car to your taste. Awesome time as well!
PRKid
p.s. When I downloaded your tune, it shows 677 HP, yet, when I build it per your outline I get 678 HP and have to change parts around to get the max PI.
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I was tired when I wrote that post, sorry. I see that I put Race Intake instead of Sport Intake and I’m running the stock clutch not race clutch. I corrected the post above.
Thanks for the clarification, much appreciated! Using the old post writeup I was able to get to within 1 lb and 1 additional HP by using Stock Clutch/Flywheel and increasing front rim. 678 HP, 2673 lbs
I messed with one of those cars yesterday. Not the same model but same issues.
I tuned it on Sonoma so yea the wheelies were epic.
I put rear springs 100lbs higher than fronts and did minimum front ride height and max rear ride height. Worked wonders. Still had some minor lifts on occasion, but for a quick tune it was pretty neat figuring something out.
Minimum front ride height scrapped the ground so I’ll have to raise it next time I drive it.
Technically speaking shortening the front ride height will create more wheel lift situation, you are shortening the suspension travel which means you pick up the wheel faster. It’s likely your change to spring rate in the rear reduced the lift in front. You can also tighten rear ARB, loosen front ARB, or increase front ride height.
I ran both of the RHs at min, and did not see any scraping at Monza, yet, it’s basically a flat track. Will check it out at Sonoma. I can see if using Min/Max the weight transfer will now become an issue to the front thus the scrapping.