Hopefully not too bad. But it does need a rear wing.

 

Nice splitter-

are you keeping the APR rear GT wing ... (looks like ur going to CF hatch?)

 

Two different cars. First one pictured with the wing is knightwhite99's car and the second one without the hatch is mind.

 

i thought u went full Cwest body kit??

 

I did, but it only lasted one track day. Needless to say, I was not impressed by the durability of the C-West kit. I went off track once and it was completely destroyed. I didn't even hit anything, just went off into the dirt. Too flimsy for the track if you ask me.

 

liek.. all of it was toast? what about the sides? do you still have em?

as for the splitter, how come you didnt extend the center portion more, past the oil pan? that would create an even smoother airflow

 

That doesn't do any good if that smooth air runs into the remaining area of the under chassis ie: a snaking exhaust pipe, this or that protrusion. It simply becomes distorted air again. Which is why undertrays are the best way to control that. This splitters underside just controls how much air is going under the nose of the car. Less air the better.

 

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The only thing that survived was the rear bumper...

Front bumper...


Note side skirt...


The sad part is that it got WAY worse than that by the end of the day.

 

Actually, a splitter that's designed to work with a good undertray/front diffuser is angled up slightly (1.5 to 2.5 degrees from horizontal) to move more air under the car.

Look a the R10's front splitter/diffuser design:

http://www.mulsannescorner.com/audir10-1.html

A splitter by itself generates downforce, a splitter with a flat front undertray and a diffuser(s) generates a lot of downforce. For the 350Z it would need to be a sedan style undertray/diffuser with two separate small diffusers pointed toward the front wheel wells.

 

Isn't that 1.5 to 2.5 degrees to compensate for part flex under load? Because i always thought that if they wanted a specific amount of air to flow under the car, they would create an open channel in the center of the front of the car. I know it is different for super cars obviously, they sit much lower usually. If that is correct what you say, it must be the very maximum allowable angle before you start using the splitter as a device to act as a kind
of wing and it wants to start lifting up instead of staying neutral.

 

you would only want to raise it up if you actually had channels / vanes to direct air in an upward move ment.. the Audi has it cuz it has a flat underbody, so by allowing more air underneath it, the rest (rear diffuser) has more air flow to work with.

for the Z. even tho there is exhaust pipes and rear suspension to deal with, by elongating the center piece, the air is smoothed out more thus creating a more even, and depending on angle, faster airflow for the amount of air that does go under the splitter.

350ZNV: were your side skirts bolted to the bottom? did they really tear out like that? DOH.

 

Not that I'm aware of. You should be able to stand on the end of splitter and not see it move at all (assuming it can generate hundreds of pounds of downforce). I am not an aerodynamics expert but I did crew on the Sportsfeed/Cunninghan GTS-R Viper team that came in 7th overall in the 2000 Rolex 24 Hours.

They were having high speed understeer problems on the Daytona banking so they set up a video camera and filmed the splitter angle of attack as the car ran on the back straight. They found that the splitter was horizontal at speed so they checked it and found the shop had set the splitter/undertray horizontal to the ground. Adjusting it to an up angle of 1.5 degrees solved the problem.

EDIT: I was told this upward angle of attack only works if there's a front undertray and a front diffuser. Without those extra aero components a splitter should be thought of as a front spoiler and positioned accordingly.

 

That is very interesting to know.
So it sounds like the car is seeing much of it's downforce by diffusion instead of downforce on the leading edge. And that angle actually would not change the splitters diffusion effect.

 

So Are these avaliable yet?

 

Yes they are.

 

Yeah, they were, but the bolts ripped big holes in the fiberglass when I went off. As soon as I got the pieces, I was instantly suprised at how thin and flimsy they were, but I figured C-West knew what they were doing and have a lot of track experience. Guess not.

 

thats pretty disappointing, i guess if u dig hard enough sideways **** will fall off regardless of brand.

you should see all the bumpers that fly off during drifting competitions.. doesnt matter what brand, they ALL come off and get ran over! haha.

 

Well, I don't know if they changed their manufacturing process or something, but these were honestly WAY too thin for just being fiberglass. Before them I had some cheap eBay replia Nismo sides that held up to 50x more abuse. Unless you saw it in person you would probably think I was exagerating, but these were probably literally half the thickness as any other FG sides I have seen. The front bumper cracked during shipping even.

 

Swift Engineering isnt too far from you, sounds like you need to book some windtunnel time.

Also, that rubber edge protector on the spliter will affect the aerodynamics of the splitter (my guess is it will cause more turbulance)