I have seen people putting 5lb bags of ice on their intake manifolds between races, swearing that it drops the times significantly. I can see how it could make a difference with the theory being that denser air will enter the cylinders, but in all reality has this proven effective for you people? Or maybe it is just a sacramento raceway fad. graemlins/clonk.gif

[ 05-01-2003, 12:56 PM: Message edited by: sik68 ]

Long runner EFI cars benefit the most from this, sometimes its worth 1 tenth and 1 mph.

Some cars do gain a tenth by that method. Pretty cheap way to get that extra tenth if you ask me.

I'm curious how much the ETs would drop if a fuel cooler was used...

i used to use a bag of ice on my mustangs' upper intake (efi) between rounds, and did indeed see a fairly consistent tenth over no ice. i have what looks like a big ziplock bag, it worked great. the motor responded best if it was well heated up (190), then had the upper intake iced. i quit doing it for the most part, to much hassle for the gain. unless for some reason i really needed a tenth. it was bracket raced mostly, so the increase was saved for best e.t. runs anyway. i would imagine you could get similar results with a carbed set up.