# My 07 Si

**URL:** <https://forums.speedlife.net/t/my-07-si/241544>\
**Category:** Builds\
**Created:** [January 23, 2009, 12:37pm UTC](https://forums.speedlife.net/t/my-07-si/241544 "2009-01-23T12:37:22Z")\
**Posts on this page:** 1\
**Showing post:** 192

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**Author:** ![1stgen](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/1stgen/32/6288_2.png) [@1stgen](https://forums.speedlife.net/u/1stgen)\
**Post date:** [February 12, 2009, 2:58pm UTC](https://forums.speedlife.net/t/my-07-si/241544/192 "2009-02-12T14:58:34Z")

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> [@Soon To Be Orphans?](https://forums.speedlife.net/t/soon-to-be-orphans/14015/11):
>
> lol you basically re-phrased me.
> 
> It’s a very similar principle as to why your car is more peppy when it’s 32\* outside as opposed to 92\* outside. You could have 20% humidity both days and I’m pretty sure your car will run much better on the colder day in terms of throttle response, etc. Unless it’s just Maxima’s…which I doubt lol.
> 
> Lower temps = better car performance. I’m sure humidity plays a role, but so does air temp.

```
All cars run better when the air is denser....what i'm saying is the t.b. spacer isn't giving you that drastic a drop in temp and that it's the increased runner length increasing your power and throttle response.

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