I asked the question of whether "icing" a stock LS1 intake did anything at all for dragstrip et/mph...

https://ls1tech.com/forums/drag-racing-tech/788207-icing-intake.html

I decided to take up the suggestion of trying it to see if it made a difference.

I let the car cool for an hour, with ice on top of intake. Intake was actually VERY cold right before I ran. Launched car at 1300 rpm's as usual. Car is an A4 car and so far has been very consistent at the strip.

Here's what happened...

.....HOT LAP/NO ICE...........ICED/1 HOUR COOLDOWN
60'.........1.77..............................1.76
330'.......5.200............................5.163
1/8........8.081............................8.042
MPH.......84.57............................84.37
1000'....10.584...........................10.551
1/4.......12.688...........................12.662
MPH......107.75..........................107.25

So...It seems everyone was right...no difference and a wasted 3 bucks...lol.

 

I guess I'll stop doing that..

 

You ran less mph, I would have to say the air quality was not as good on the 2nd pass.

To be accurate you'd have to have the same 60 ft, same shift points and the air quality/density would have to be equal for correct results.

 

You might want to pay more attention to your short times. My guess would also be that the DA was worse for your second run.

Daren

 

dont let it drip,you will be corrsion on the knock sencors.

 

Would the air quality have changed enough to make a difference, in one hour? I don't know, which is why I ask.

FWIW, The difference in the two sixty foots are .011, eleven thousandths of a second, which is pretty darn close IMO...and the car was shifted via the ecm like it always is.

The car's ET's and MPH's are deadly consistent so far, which is why I even posted this thread.

A week prior the car had the same (very consistent) sixty foots, same exact eighth mile ET's and MPH's, and same 1/4 mile ET's and MPH's for the four passes I made, which were in the course of a three hour span...

 

Not sure what I should be paying attention to on my short times? As stated above, they are within .011 of a second. Am I missing something?

 

told you...

plastic intake... no point in using ice.

 

correct.

 

Yes, you are missing something. You were almost four numbers faster in the 330 over the first run. Your back half numbers show that you were a little over one number slower, which means that the air changed slightly for the worse. If you had run in the same air, you probably would have run a 12.649.

If you use Zip-Loc bags you will not have any mess.

Take Care,

Daren