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Road Course/Autocross Tech Autocross, Road Race, and Open Track Event discussions. Preparation, technique, tips, and stories from the events. Tell us about your last event.

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Old 10-22-2007, 02:43 PM   #1 (permalink)
Registered: Aug 2007
Posts: 36
Reputation: theshadow is an unknown
Engine cooliing for track

I've been very busy building up my car for AutoX competition lately and have finally made my way through a long list of engine, suspension, interior and brake mods. The car is an EVO IX GT, meaning that it has the RS 5 speed gearbox and came with Lancer seats but included other goodies such as the Brembos and Enkeis.

Anyhow, I'm very confident in my car's setup and will be jumping right into AutoX competition with it, fine tuning the suspension settings as I go along. However I would like to use the car for trackdays as well so I'm wondering if people might be able to contribute some ideas as to how I could/should go about cooling the engine. Currently, if I drive the car very hard, the oil temp goes up to about 110 and stays there, with water going up to about 90 and staying there too *but* I haven't pushed in on the track yet which, as most would know, that's a whole other level of heat and general pain for the engine given the longer durations of stress, load, heat, pressure, etc.

If it helps, the engine mods include HKS 272 cams, cam gears and retainers, ported and polished head, stock turbo (15.5G), DV and fueling system except for a Walbro 255 fuel pump, Blitz drop in panel filter in the stock airbox, 3 inch downpipe and exhaust with the stock O2 housing and a mildly aggressive tune that runs the engine purposely richer at higher rpms (6+). I run a maximum of 1.8 bar of boost on the high setting and 1.4 on low. Car has been datalogged by the tuner during hard driving consitions (engine temp 110 degrees) and no knocks. Guessing 350-360whp from this setup.

Would prefer quick and dirty ideas on how to cool the engine on track, preferrably budget-conscious ones however I'm open to hearing any reasonable suggestions that would be effective based on others' experiences at the track.

Oh, and a pic of the car - just because I'm proud of it and because I think it's quite purty too


PS My apologies for the typo in the thread's title in case my high school english teacher is reading this :P

Last edited by theshadow; 10-22-2007 at 02:54 PM. Reason: more info
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Old 10-23-2007, 06:44 AM   #2 (permalink)
Registered: May 2007
Posts: 74
Images: 9
Reputation: fdiaz18t is an unknown
Hi. I have the same question as you.
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Old 10-28-2007, 05:45 AM   #3 (permalink)
Registered: Sep 2005
Posts: 137
Reputation: ghoonk may or may not be a helpful member
My suggestions:

1. dual oil cooler setup - doesnt have to be HKS, even a 2nd stock E9 oil cooler would help. more cooling, but you'll need more oil than usual.
2. Tomei oil thermostat
3. Ralliart water thermostat (71 deg C)
4. thinner oil (10W60 flows more slowly than 10W40)
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