I've already done the DOT4 swap. I'm running the store bought Valvoline DOT4 stuff. Are all DOT4s pretty much created equally?In addition to upgrading the brake fluid to DOT 4 you will need better brake pads than stock for any serious track work.
I agree. I wish my springs were linear rate instead of progressive. I'm on the FRPP K springs, which are supposed to be the ones used on the Shelby GT. What springs would you recommend?What kind of springs do you have? FYI, most "lowering springs" are junk. They lower your car without an adequate increase in spring rate, causing your suspension to bottom out when cornering.
The stock springs are better than a lot of the cheaper lowering springs out there.
A friend of mine is an employee at Road Atlanta, which is about 40 minutes away from me like another member just mentioned. He said they offer "PDX" sessions through SCCA, and each session costs $100 which gives me 40 minutes of seat time with an instructor. I'd say that's a good deal, if I can find a way to avoid the $85 membership fee. I emailed the region administrator about "weekend passes," so we'll see.A note on financials: NASA annual membership is $35, IIRC, and a weekend registration is around $300 or so, depending on the track. I don't know what the SCCA scheduling is like, but with NASA you'll get between four and five sessions a day, at 20+ minutes each, with an instructor as part of the package. That's close enough to three hours of one-on-one instruction, plus classroom time. That's pretty high value, when it boils down. Some tracks offer one-on-one instructors on a private basis starting at $900 per day. Yes, Autocross is cheaper in a bottom-line analysis, but on a per-hour basis, not so much. A handful of 40-second single runs does not give you the same learning opportunity as multiple laps back-to-back.
...The main thing with any DOT 4 fluid is to completely replace it on a regular basis....The reason is that DOT 4 fluid absorbs water faster than regular fluid and the more water in it the lower the boiling point...