1) I'm getting used to matching revs. At first the car jerked quite a lot between shifts. Now I have gotten it down better, but the car still jerks sometimes (I'm working on heel-and-toe so sometimes I have a lot to think about while I'm shifting
). Am I supposed to be able to lift my foot of the clutch instantly and get a perfectly smooth transition or that being too anal? When I do mess it up, it sends a shock through the transmission. Can I get away with doing this now and then, or will it irreparably warp the transmission, and I should therefore be more careful?
Some slippage is acceptable when shifting. Any slight mismatch between the engine and tranny revs are corrected in that transition. As mentioned, constantly "dumping" the clutch is bad. It just takes time and practice to get the right feel for it. Granted the 207 RC is a sporty little car, but heel-and-toeing the brake and gas pedals is usually reserved for racing...hardly necessary on streets unless you really want to keep the speed up through a corner. It's just excessive wear on the brakes.
2) I drive a lot on highways, and to cruise at 150 km/h the engine has to constantly rev at 4500. I'm wondering if that would wear down the engine too much (peak hp is at 6000 revs and redline starts at 7000 revs)?
Top speed is listed as 220 kph @ 6,000 rpms...so 150 kph @ 4,500 sounds about right. You sure you're in 5th?
3) What's a good engine oil to use in very hot and dry climates? The previous owner used 0w30 and I'm thinking of changing it to 10w40 semi synthetic. A good idea?
Use the viscosity recommended in the owner's manual. Too high viscosity can starve an engine of the lubrication and cooling it needs....and is critical for turbocharged (TC) engines! Using a semi-synthetic or full synthetic can help prolong engine life. Most modern TC engines require synthetic, don't get cheap!
4) A nail punctured my tire (which is still pretty new, damn it!) and I had a mechanic plug it with a tire repair compound. Is it good as new again, or should I change it asap?
A good patch & plug job should be fine for the life of the tire. I'd avoid the tire-patch-in-a-can unless you are stranded and desperate.
5) Wat makes ur car go fastur?! fire decallls, or nEEons?!?!!
Decals just weight you down and create drag. The light emanating from the neon bulbs causes the surrounding air to become excited and heated up, creating a slight pressure that propels the car to incredible vel....yes, I'm full of s**t.
Hope this helps!