67Fast_V
Well-Known Member
- Thread starter
- #106
Interesting project. Cool to see lots of different applications. The SC will certainly make cooling a challenge if you push hard. On the hood vent, I would not expect 10 deg F reduction ... more like 4-5F. However, the more leaks there are (and bigger grille if you go in that direction), the more cooling benefit you will get from the hood vent.Thanks, I look at it more as multiple approaches complimenting each other, rather then making choices. I don't want to mess with ducting and opening up the grilles before I add a way to extract all the additional air that will be coming in (hood buffering and lift), so adding louvers seems to be a good first step. I will have an opportunity to test it first and then add ducting and test again. Would be interesting to see progression. As long as I can cut up to 10 degrees just with louvers, that would be great.
My goals for the reference - I have manual GT with PP1, so no issues with transmission oil heating up everything else. However, I also have a roush/fp supercharger, which is adding quite a lot of heat. I don't have issues short shifting, as I'm not chasing any lap records and have enough torque at any point in rev range. I also live up north, so I don't have to deal with very high ambients. In my recent HPDE event, the first day it was 50F and raining almost all day, next day it went up to 65F with sun. Car did great, especially on first day I don't think I saw CHT's going over 210F. On a second day, it started climbing towards 225F, but 1-2 cooldown laps per session kept it in check. As long as I can stay within 230F range during warmer days, I would be happy with the result.
In practice, it's difficult to determine the exact benefits of cooling mods because of inconsistent conditions. Max temp is driven my max heat load and that will vary quite significantly from lap to lap and day to day. I have found that unless I get at least 2 laps back to back, both at full effort (hammered), I don't know the max temps.
There has been many of my sessions where I see 230-235F type max CHT but this is not a true indication of where I stand, unfortunately. For example it took the 4th session at my last event to get 3 consecutive laps at full bore. I was feeling good about the benefits of my hood vent up until that point. Seeing temps in the 230F range and a nice reduction on the tranny temps as well. And then the reality set in and got reminded of the physics. What an awesome learning process, though. Cheers.
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