[TonyB]

Boy, I can't imagine someone saying that lighter aftermkt wheels and tires didn't make much difference. I suppose it depends how much lighter one goes, and how often they plant their foot Seriously, if one can lose 40 to 50 pounds of rotating mass, the giddy-up is greatly improved!

My 16" wheels are 10.75 lbs, and with the tires just over 20 pounds ea, I lost just over 10 pounds per corner, and with front aftermkt rotors, an additional 1.5 pounds, or almost 12 lbs per each drive wheel has been shed...

I just got married about a year ago, so I hear ya! Take care.

 

[flyboy2160]

i'm wondering how much of the improved throttle response is from new software and how much is from the larger throttle body.

 

[obehave]

Boy, I can't imagine someone saying that lighter aftermkt wheels and tires didn't make much difference. I suppose it depends how much lighter one goes, and how often they plant their foot Seriously, if one can lose 40 to 50 pounds of rotating mass, the giddy-up is greatly improved!

My 16" wheels are 10.75 lbs, and with the tires just over 20 pounds ea, I lost just over 10 pounds per corner, and with front aftermkt rotors, an additional 1.5 pounds, or almost 12 lbs per each drive wheel has been shed...

I just got married about a year ago, so I hear ya! Take care.

I got to talk with Randy a bit at a pulley party last weekend but forgot to ask him about how much material was removed.
I see my post there got zero response.
Definitely let me know what you find out. Right now I plan on getting the parts early next year. Must get christmas out of the way first
I'm with Tony though. Bigger TB, open up the manifold, run some headers and maybe cat back. You'll see more high end. There's a good chance you'll lose a little snap at low rpms though.

Now back on topic.
My first tire switch was just buying another set of used X-Lites and putting non runflats on them. Saved just short of 5 lbs per corner. That made a nice difference. Easily improved acceleration and handling. Next was the NZO Monzas (same tires) and another 2.5 lbs per corner saved. Again a noticeable improvement.
My SSR - Kumho auto-x combo is, if I remember right, is 6 lbs per corner lighter still. The tires are 205-50s and the car becomes very quick with them on. Some of the effect is the reduced diameter and some the weight.

I understand your desire to keep the runflats. I still have my originals.
Last time I had them on the car felt slow.
But, I really don't think that has any real impact on CooperSAZ's feeling that the high end pull thins out.