I just checked the DA it was between 1000 and 1500ft that's almost like running at CS. The track elevation is 167ft. the temp was 77 with 57% humidity. I have to wait until the temp is in the 60's for it to be below 500ft. Hopefully next month I'll do this test again the way you described when it's alot cooler.

 

wow that humidity suX!

How are you calculating the DA? Everything I find requires dew point and altimeter

 

The DA's at CS are hardly ever at 1000-1500

Considering the usual temps, the 2 times I've been there its been atleast 3300 DA's

PS. Humidity doesn't play a huge factor in DA's compared to temps, elevation, & pressure.

.

 

The Z's ET was slower because his 60 foot was a bit worse. That alone would account for a .3 seconds, however, he has about a 150lb weight advantage so some of that would be negated on the far end. The weight also explains why his trap was a bit better. His ET might be suffering because his exhaust may have killed most of his 1st gear. Your 3.5 gear is also hurting your MPH. I've run 24" DRs that made my car's effective ratio a 3.55 and my ETs were marginally worse, but my trap speed was 2mph slower because of the shift into 4th. My car went from 97.5mph to 95.5mph. Same day tested at the strip. That shift into 4th really kills MPH.

A 1,000-1,500 DA really isn't that bad. It's only impacting ET by about .15 seconds a MPH by 1mph.

It looks like the airbox may have improved power. It definitely looks like it didn't hurt anything. I will be ordering mine soon.

 

I'm tempted to reinstall my 06 OEM airbox and compare it to my current Stillen setup which I just recently cleaned out.

 

^you can send it to me for free and ill test it out for you!

 

that's how it is in the south. I used the link in the 1st post of the top 25 drag times in our drag forum. It only asks for temp, humidity, elevation, and bar pressure.

 

true about humidity. the temp was 77 when I started racing the DA was 1500 when the temp dropped to 68 2hrs later the DA changed to 989. The pressure was 30.01.

I was talking more the 1500 for CS which could happen when it's cold out. We always went when it was warm or hot.

 

The box didn't hurt anything if anything it helps with response to me. True about the shift into 4th. I had to shift into 4th that race right before the finish line while he held 3rd.

We got into a debate about the airbox. He told me if I wanted more power to take off my airbox and put on a cone filter. I told him wrong but he didn't believe me.

The filter he had didn't even have a heat shield it was home made so it was sucking in nothing but hot air. We are supposed to meet on sunday I'll take a picture of it.

 

Did you swap out your gears to 3.5 FD?

 

I'm not so sure your theory on shorter gears (in several threads) is altogether accurate... I ran 101+ last time out with 3.7 (fastest was only 99+ with 3.3)...

 

what gear were you in for both cases?

 

with 3.3 he finished in 3rd and 3.7 @ 4rth. with 3.7 he went into 4rth @ ~85-90 mph. I'll let him confirm this..

 

But don't you have an extended redline and a higher stall TC? You also have a 3.7 gear, not a 3.5. All this makes a difference in terms of the torque multiplication for each gear. A 3.5 gear simply isn't the right gear for a VQ35DE 5AT in the 1/4 mile with stock height tires, stock TC, and a stock redline. Shifting into an undergeared 4th about 100 to 200 feet short of the finish line isn't ideal. The 3.7 may be a better choice because it has more torque multiplication and the other gears are shorter.

 

3rd