Quote:
Originally Posted by TkTk
Congratulations on solving the oil presure problem. I have been following you from the start and I have to say I am speechless. No one has taken the fa20 this far yet. 
I know by now you solved the fuel starvation and oil pressure problems, but what about heat management when you are at 450-500hp TC built motor ? TC produce significantly more heat than a SC, so why go that route? And how are you managing the heat under these loads? I don't think an oil cooler setup and a vented hood will be enough.  |
There are definitely some advantages to a supercharger if you want very modest hp. First the power is linear so you don't need as much oil pressure as fast. Also because most turbocharger kits place the turbo between the radiator and the block you get more radiant heat and less flow through the radiator. Even with a supercharger however engine oil temps are no better, they are still sky high.
A turbocharger will make way more power and way more torque than a supercharger (on the FA) and that's the advantage.
Now on a race car not having a turbocharger behind the radiator would allow for nice ducting to produce more flow and downforce out the hood. For our car we just abandoned anything aftermarket "bolt-on" as I knew it would never be enough for racing at our power level. The cores are just physically too small given it can't be ducted ideally.
We just decided to build a custom radiator setup and run a massive core similar to what we race with in our Time Attack STi. This required some custom fabricating but nothing crazy at all. Just a new bumper beam and radiator support which allows us to mount the radiator straight up and down so it can be taller.
Keeping your engine water temperature cool will also help with oil cooling.
We then went with the large louvered hood vents to help evacuate and improve downforce at hight speeds.
Thanks,
Phil Grabow