Maybe it's just me. My 07 just hit 7,000 on the odometer. Honestly, I had yet to be really impressed with its down low pickup, but the high rev action was good. Lately, she seems way more energetic and fun.

Did she just need a little time to open up? Or have I been driving like grandma until now?

 

mine's at a little over 9,000 and it seems to be a little more jumpy and ready to go from the line; maybe it's just psychological.

 

mine seems like a timming issue when i reach high rpm's

 

Maybe just the denser cooler air...

ncdoc

 

The power chip kicked in for an additional 20 HP.

 

Lord here we go again...its 20HP SAE so really its like 30HP...

 

Very possible, when I finally got on the car after I broke it in, I never spun tires from dead stop. Not even a chirp, I remember havin fun with a friend and I just took off and he was there spinning. Now I could spin them so easily and im in an auto.

 

+1

When it's 45 degrees or colder outside the 07 just screams up top.

Much more so than when it's like 68 degrees...

 

Thanks for the correction. I was speaking in JDM.

 

could be your tires...

 

i have almost 4,000 miles on my 07 Z car, and until about a week or so, i havent brought it over 6,000 rpms. Since then, i've brung it to redline, and the car feels kind of like it woke up from a nap :P This kind of makes me think a few hard runs is good for the z..

 

Colder air makes a lot of sense.

 

mine feels slower now at 10k miles

 

because you are used to the power. it happens to everyone. drive a truck or slow car for a week, then drive the Z. it'll come back; i promise.

 

Well, I was breaking traction easily while the tires were still healthy and the temp was warm.

 

I hit 12789 and I feel like it loss about 5 to 6 horses.

 

I wouldnt doubt it, my built motor seemed to get faster everytime I drove it up until about 7000miles also. Unless you dyno'd new and now though, its all butt dyno talking...

 

Ok, if someone can "feel" the loss of 5 or 6 horses, then you need to be a professional test driver. That is 2% of the overall power and most people wouldn't feel the difference of 20HP. I don't think anything "kicks" in at a certain wear point, and anything would be gradual.

 

+1 on the cold air and better engine performance.

RE050s(summer tires) will spin more when its cold outside.

 

+1 on the cold air...just about the only reason I like winter, the 'extra' hp