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A2W IC legal in SCCA Autox?

Old 05-24-04, 02:14 AM
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A2W IC legal in SCCA Autox?

I did some searching around and didn't find any conclusive answers and I don't have the Pro Solo rule book handy. I've been thinking of fabbing up an A2W IC, and was wondering if anybody knew off the top of their head without a doubt whether they're allowed or not? thx
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Old 05-24-04, 07:07 AM
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For a stock class the intercooler must be stock of course but in SP on up the intercooler is unrestricted. There is a clause however that insists the intercooler must only be cooled by the atmosphere. Things like ic sprayers using chilled liquids or compressed gases are absolutely prohibited. It also means an air to water intercooler would have to use "plain" water or glycol. You would not be allowed to fill it up with ice water before every run for instance.

As always, check with the SEB first to be absolutely certain.
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Old 05-24-04, 10:30 AM
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What we do in the pit is spraying the IC with ice cold water...
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Old 05-24-04, 11:47 AM
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Originally posted by reza
What we do in the pit is spraying the IC with ice cold water...
As long as there is not a device installed on the car that does this for you it's legal. My two driver car gets its radiator misted just after each run until temps drop to under 200F, then it's shutdown. After 15 mins or so the intake manifold and airbox get hosed. Immediately before startup and heading to the line the manifold is hosed again and we add another big shot of water into the ic duct and into the crossover tube from the duct to the airbox.

When it's 100+ degrees in August around here I can tell a difference in the beginning of the run between spraying and not spraying the intercooler duct and airbox.
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Old 05-24-04, 04:07 PM
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Hmm quite a fine line, currently I have a spray bar on my IC but I only use it in the pits, its not setup for use on the track, as I do not want to put water on the track if I don't have to.... cause a little grime from the motor gets washed out with it at times. So technically I'm illegal even tho I have it setup to be used similarily to the weed sprayers... very interesting. I will have to check the rules on an A2W IC, maybe I'll just go that way and be done... thx for the replies.
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Old 05-24-04, 04:51 PM
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Found the rule which might help for clarity.

14.10.C:
Carburetors, fuel injection, intercoolers and intake manifolds are unrestricted. Alternate throttle linkage and connections to facilitate installation of allowed induction systems are permitted, but may serve no other purpose. As utilized only on engines originally equipped with forced induction, air-to-air heat exchangers (known as "intecoolers"), and radiators which are part of air-to-liquid charge coolers, must be cooled only by the atmosphere.

The use of chilled liquids, ice, dry ice, refrigeration systems, vaporized compressed gases, etc. is prohibited. If an induction system item is allowed to be removed and its original mounting bracket can be removed simply by unbolting it, the bracket may be removed as well. Turbochargers may not be added, changed or modified. Turbocharger and supercharger systems may only be updated/backdated with the accompanying engine unit. No changes are allowed to waste gates, pressure sensors or their location, and to other turbocharger or supercharger boost limiting systems. This allowance does not permit changes to blow-off (pop-off) valves. Devices known as "fuel cut defensers", and any modifications which alter or defeat the fuel cutoff when it is activated by boost level, are not permitted.
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Old 05-24-04, 11:53 PM
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yeap use water and ice, works really well...Cool it down so that you can touch it by hand and feel cold....
Use the regular weed sprayer from OSH....
we use it on the kumho when it had too many runs as well
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Old 05-26-04, 11:34 PM
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I spray my intercooler between runs also with an old Windex sprayer. I've removed the crossover box and have a tiny plastic hatch over the outlet cutout on the top of the intercooler duct that I leave open to allow air to evaporate the water as I spray, then I hose the crap out of it and close it up just before heading to the line. I can really feel a difference on the hot days.
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