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Old 02-15-2018, 04:24 PM   #1
BH1
 
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Ice Packs and the Texas Mile

At the last Texas Mile event I participated in, I noticed those with TVS/Roots superchargers putting ice packs on the top of the supercharger between runs. While I understand that they are working to keep the IATís low for the next run, I have a couple of questions about the interval between runs.

Itís typically several hours between runs, which gives the engine time to cool down. Being that the engine has cooled down, is the ice needed? Iím guessing leaving the ice on helps while staging prior to the next run. If this is effective, is it better to leave the hood open with the ice sitting atop the supercharger until the last minute; keeping the IATís down?

Seems to make sense, but I donít want to look silly if it doesnít make much of a difference when the engine had cooled down. Depending where you are in the line called up, it can take a bit to get to the front.

Iíve always had a modded N/A car, this my first FI experience and I want to make the most out of my run next month.
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Old 02-16-2018, 10:30 AM   #2
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I think I have 5 Texas mile trips and all of them were on forced induction, in theory every little bit helps... In practice the only thing that really keeps the IATs down over a one mile run is circulating about 10 pounds of ice through the intercooler system.... and the longer you idle the more ice you melt prior to the run, that is why it really makes a difference if you can push your car to the starting line.
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Old 02-16-2018, 01:35 PM   #3
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Thanks Jessrayo. I would need an ice box system be able to circulate the ice through the intercooler, correct?
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Old 02-16-2018, 02:33 PM   #4
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Not to push people's channels on here but this guy was doing a rebuild and added the killer chiller. You see them touch the lines and blower and it was cold to the touch after doing dyno pulls. It's a gen 5 but gen 6 cars have installed them too. Long video but if you forward to when they are looking under the hood you'll see them talk about it.
https://youtu.be/nXLBFTpeJaM
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Old 02-16-2018, 08:56 PM   #5
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Thanks Joe. Iíve thought of adding the same mod.
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Old 02-17-2018, 01:03 PM   #6
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I'm playing around with thermal isolators and I'm finding that it takes about 24-36 hours for my TVS supercharger to fully cool down to ambient temp after a run. This is inside a temp controlled garage and the temp on top of the case at 110F right after shutting the engine down.

Sure surprised me.
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Old 02-17-2018, 01:46 PM   #7
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Quote:
Originally Posted by Atomic Ed View Post
I'm playing around with thermal isolators and I'm finding that it takes about 24-36 hours for my TVS supercharger to fully cool down to ambient temp after a run. This is inside a temp controlled garage and the temp on top of the case at 110F right after shutting the engine down.

Sure surprised me.
This is a great explanation of depth of heat soak.
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Old 02-17-2018, 09:18 PM   #8
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Quote:
Originally Posted by Atomic Ed View Post
I'm playing around with thermal isolators and I'm finding that it takes about 24-36 hours for my TVS supercharger to fully cool down to ambient temp after a run. This is inside a temp controlled garage and the temp on top of the case at 110F right after shutting the engine down.

Sure surprised me.
Well crap, maybe I should be looking into an Ice Box system.
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Old 02-19-2018, 08:56 AM   #9
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We log all the data on my car at the Texas mile and the ice box really works, like max IAT of 90 at the end of the run. I have heard the chillers help at the mile but they cannot come close to ice. The chillers are driven by the a/c compressor and that turns off at wot. Plus think how long an ice machine has to run to make 10 pounds of ice and then think of how long you would have to run the a/c compressor on your car to get that level of cooling....the ice box is the answer.
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2016 SS -AGP twin Borg Warner 7163 EFR's, LT4 mechanical pump, LT4 injectors, Walbro 255 low side, Castrol SRF. 734whp/759 tq

2013 ZL1 -ADM - 427 LSX 6 bolt, O-ringed block built by LME. Twin PT6466 turbos. RPM custom manual trans, RPS Quad carbon clutch, 9" Hendrix rear diff & axles. ADM/squash fuel system, Ron Davis radiator, Spal fans, AGP air to air, turbo plumbing. LPE oil cooler, rear bushing upgrade, roll bar...etc. rwhp 1400+... 212.5mph, best Texas mile to date.
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Old 02-19-2018, 11:13 AM   #10
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Quote:
Originally Posted by jessrayo View Post
We log all the data on my car at the Texas mile and the ice box really works, like max IAT of 90 at the end of the run. I have heard the chillers help at the mile but they cannot come close to ice. The chillers are driven by the a/c compressor and that turns off at wot. Plus think how long an ice machine has to run to make 10 pounds of ice and then think of how long you would have to run the a/c compressor on your car to get that level of cooling....the ice box is the answer.
Thanks for the feedback. Are you going to be there next month?
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Old 02-20-2018, 08:55 AM   #11
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Thanks for the feedback. Are you going to be there next month?
No, I can't afford to do it twice a year and have been going to the fall run. Best of luck to you.
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2016 SS -AGP twin Borg Warner 7163 EFR's, LT4 mechanical pump, LT4 injectors, Walbro 255 low side, Castrol SRF. 734whp/759 tq

2013 ZL1 -ADM - 427 LSX 6 bolt, O-ringed block built by LME. Twin PT6466 turbos. RPM custom manual trans, RPS Quad carbon clutch, 9" Hendrix rear diff & axles. ADM/squash fuel system, Ron Davis radiator, Spal fans, AGP air to air, turbo plumbing. LPE oil cooler, rear bushing upgrade, roll bar...etc. rwhp 1400+... 212.5mph, best Texas mile to date.
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Old 02-20-2018, 04:13 PM   #12
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Originally Posted by jessrayo View Post
No, I can't afford to do it twice a year and have been going to the fall run. Best of luck to you.
Thanks. Iíve not been since March 2016 and Iím really eager to see what this car will do.
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