erioshi wrote:
It's really hard to talk about suspension in terms of absolutes.
Everything starts with the tire. It helps to have some idea of how the specific tires you plan to race on will behave when side loaded and under acceleration and braking. Knowing the tire manufacturer's recommended setup information for your chosen tire (right down to any specific quirks in your chosen size & sidewall if possible) is also helpful.
Then you need to have some idea of your car's sprung and unsprung weights, and how the car will be driven. If you can sort out a ballpark CG from here even better. All of those factors, plus wheelbase and track width go into figuring out weight transfer. Once you know that, you have some idea of what your (starting) spring, damper and sway-bar choices will be based on your preferred degree of roll stiffness and chosen suspension frequency.
Then you can work out roughly how much roll you will see in a given corner with a given side load. Factor in the weight transfer for acceleration and braking events and you are back to optimizing the suspension geometry to move so it best fits the tire's characteristics. Torque/HP also matter, as they help to determine if you need to prioritize acceleration and braking over steady state cornering.
I think it's great that you're sharing this information, but I guess I'm struggling a bit to put it into context as part of how you plan to use your car. While you have quite a bit of detail on parts of your plan and build, I didn't see anything talking about tires sizes, engine, planned power, etc. Of course it's possible that I missed it when I re-skimmed the thread.
Erioshi,
Those are pretty easy questions to answer to some extent.
The car is going to be 70% road and 30% track. The power train is a 5mt with a limited slip, B20Vtec with 8k rev. and output should be around 190ft/lbs and 250Hp.
The tires i have right now are Kumo Ecsta 205/50-R15 tire for set up then i am switching to a Advan A048 tire in the same size.
Shocks will be Koni 30 5325 with spring rates of 350rear and 300front.
Target weight is 1500lbs and i will post the estimated unsprung in a bit. No plans for sway bars yet but 2°-3° would be ideal.. i think.
Hope this clarifies.