Quote:
Originally Posted by Spec Jay
Very interesting thread
If I remember right, SPL says that going from OEM bucket to true type increases effective spring rate by 1.66.
Currently running a custom front splitter with air dam with around +.5 degree AOA with 3" of protrusion. Rear wing is a Aeromotions 72" (DO NOT BUY. It works well but a **** company.) with 6 degreesl AOA. Spring rates are 14k F rear 12k in OEM bucket.
So if I went to a true type I'd need somewhere around 7.2kg springs to maintain the current balance.
Balance of the car is setup to be slightly neutral right now. with a degree less in the wing it was almost perfectly balanced.
I was running these spring rates without aero and now with. I definitely feel that I could use a bit more rate purely going off my amateur seat of pants feel.
Here's SPL's spring size calculator but it's where I grabbed the info about the spring location modifier (spring motion ratio)
http://www.splparts.com/content/SpringCalculator.xls |
Thanks for the info as it is in line with much that has been posted. I am definitely running way to much rear wing for the my GT 300. I will be starting over as Daniel recommended: " Dial the center of the wing so the angle is actually more like -5 degrees to start with (with the front slightly higher than the rear of the wing), so it’s being used at its most efficient. Then, check for high speed understeer/oversteer and adjust from there.
If it has high speed understeer, lower the front of the car. If it has oversteer, maybe take the main plain of the wing to 0 degrees (parallel to the ground). If it still oversteers, raise the front of the car to reduce front down
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