Quote:
Originally Posted by Hotrodz
Hi Ryan, aero is a quite complicated and I have done some research and talked few pros on the subject for a circuit track car. The referenced videos are excellent resources.
So if you aren't going to do more straight line events you want to stay as streamline as possible. A vented hood is a must for the Z. The only aftermarket hood I would buy at this point is the INGS+1Super Taikyu Racing Bonnet. Was specifically made for track car 370z's in Japan. There are very few in the US. The placement of those vents are in the exact same spot that the Trackspec hood vents are supposed to be place. The Trackspec vents were designed through CFD and most everyone I have spoke to or read reviews about indicate about a 10* drop in temp to go along with the benefits of additional downforce without increasing drag. If you want to improve the efficiency of your hood vents then you will need to duct the air coming into the front of the car. It will move air more efficiently through the engine bay and the hood vents.You will probably want to get fender vents or vented fender to also reduce high pressure areas caused by the wheel wells.
Spooler runs tall and wide tires so his ability to lower the car is limited. I have seen enough data and CFD diagrams to show lower the car by one inch will lesson drag, but I'm not sure how much if any over 140 mph. A flat floor is necessary to decrease drag significantly.
Also should consider a front splitter of about 3 to 4 inches. Again there is the benefit of downforce, increasd drag and improved front end stability vs lift and increased stability at higher speeds.
Lastly, in the rear I would stay with duck bill or shot wing like the Nismo or Amuse. If you are serious about getting rid of in the rear of the car you will need to shave your rear bumper. Rear bumpers are huge parachute if you don't have a flat floor. I had mine shaved and you can see it in the video I posted.
Anyway I hope this is helpful. I know some of it is extreme as it is all about what are you chasing in the end. My car will seldom see more than 140 so maximizing downforce for most tracks is the goal since I have enough power to overcome the drag deficit.
Sent from my SM-G965U using Tapatalk
|
Bob, you never cease to amaze me and thank you so much for taking the time for a detailed response! I love all your knowledge and we are lucky to have you as part of the FI brotherhood
Your car is well beyond what I think I will ever be. Right now I wanna go fast and just look pretty. lol! But from those videos and what you've mentioned, those ducts would have been a waste. I REALLY like the idea of ducted the airflow from the front grill into the intercooler. That seems like such an awesome concept. And I will certainly look into the hoot you mentioned! I really loved the looks of the Varis Cooling Bonnet 2 which to me looked like it would drastically improve temps, but not sure on the drag side of things. So more to look into, but thank you for pointing me in the right direction!