That's a lot easier to do with a rear/mid engine platforum. Trying to vent the exhaust heat on a front engine setup will be super tricky...to say the least.

I say we just go exhaust exit just behind the frontwheel well. That would solve that problem.

 

Sharif....look at the bottom of your GTR....we will use that idea

 

correct me if im wrong but alot of the GTR pictures that im looking at the bottom of the car isnt completely flat there isnt a center peice. i think if you really want to make this happen though the placement of the exhaust is going to have to be changed. because without a center section i think your going to end up getting stuck with the same effect as if you take out the stock muffler you get air getting trapped. however im not really sure because the center section of a Z is actually pretty flat other than the tunnel for the driveshaft/exhaust only way to find out for sure is some testing. to say the least though this has been a really good thread with lots of insight and learning involved for sure.


also im with shariff on changing the ehxaust exit location but then again that would compromise the "for everyone" aspect of it and turn it into a more one-off kind of deal. venting off exhaust heat is a problem. is there any way of venting in air from external sources?

 

The set up on the Ferrari and the setup on the GTR is going to be different because one is a Front engine and the other is a rear engine. SO we have to go with the setup of the GTR because of exhaust and transmission cooling. I was just using the Ferrari setup as a bench mark because no one posted a picture of the belly of the GTR.

Putting the exhaust exit up front is not something I would go with...Sharif knows that

With the TS diffuser....exhaust setup will not be a problem.

 

http://new.nissan.gtr.googlepages.com/home

Here are some pictures of the GTR under belly

 

Thanks very much.....I had one for a few days....but i though that the dealer had removed the center part......This will be too easy..

 

quick look at the rear diffuser part of the GTR vs say a ferrari theres a few visual things which i bring up to question. the end of the diffuser where the air leaves on the GTR is very flat vs the ferrari's also the use of fins on most other hyper cars: ferrari, pagani, saleen, buggati,and cgt. wonder if those things play a significant role in their design.

i think the GTR's is more for just high speed stability and not as much for downforce. just a guess though.


**edit
after doing some reading the veins are there to help with the separation caused by high divergence angles which im assuming is the point at which the air is leaving the diffuser. which accounts for the use of them on say ferraris because they have much steeper angles. another thing i wonder when looking at the design of the top secret diffuser its almost upside down from the ferrari design. sorry for my excessive use of ferrari as a reference but they are really good with aerodynamic as show in F1.

also some of the reading says the actual dimensions of the object in question has a significant role in the appropriate angle.



i still dont know why i find this subject which should be really boring to be so interesting.

 

It doesn't look like the GTR has a diffuser. Just a flat undertray. Keep in mind the GTR has a rear wing.

 

^^^

werd....quality flat undertray

 

Thats one of the reasons ...It has a rear spoiler...Plus the Ferrari's setup differs from the GTR because of different motor locations.....

We have to start somewhere...TS already did the ground work for the rear diffuser...so I will start there...we will pick a front under cover to replace the stock one and then study the GTR mid section and see what happens. We will set up a test and see if I wasted my money on the TS rear diffuser.

We have one year to do this right...no rush.

 

[IMG][/QUOTE][/IMG]

i kind of like this design. you could always dremmel out more room for an exhaust. this one looks like it does a better job of using more area and does a better job of smoothing out airflow before it leaves the car. but this is for a Z not a G so that is a small problem. the only issue i see is where the springs sit should be covered. that looks like it could cause a HUGE amount of drag and turbulence.

 

I don't think the Top Secret diffuser would be a waste of money Mike. Unlike radiologue, I have no reason to believe the Top Secret diffuser isn't functional. Just look at the design and the vortex generators on the side. And it also covers the void left behind when the stock muffler is replaced with dual exhaust. Smoky tests all of his aero parts at high speed. The guy is a wangan legend. How many owners test their own parts at 200+mph???

 

[/IMG]

i kind of like this design. you could always dremmel out more room for an exhaust. this one looks like it does a better job of using more area and does a better job of smoothing out airflow before it leaves the car. but this is for a Z not a G so that is a small problem. the only issue i see is where the springs sit should be covered. that looks like it could cause a HUGE amount of drag and turbulence.[/QUOTE]

Clean looking.

Exactly...it has been well tested...thats why I want to start with TS

 

Smoky's g35 tuned Car which reached 341km/h at Autobahn Attack , although the car have diffrent engine v8tt but the idea is what kind of under tray did he use

http://www.topsecretjpn.com/gallery.shtml

vid link
http://www.youtube.com/watch?v=d9_3w2pRRPc

http://www.youtube.com/watch?v=86aVZh4Jsd4

 

Yeah, welcome to what I discussed 2 pages ago.

Thanks for the vids though.

 

my god thats a build. awesome man! good luck!

 

I am trying to convince XKR to do an APR rear wing...at 200mph we'll defefinately need it! We'll have to reinforce the mounting locations, and probably will end up mounting it to the trunk floor pan. If we mount it to the trunk deck, it will deform the deck at high speeds, which could be disasterous.

 

....Cant do the wing thing....I did call a Top Secret dealer to order the front plate and the rear diffuser....he is not sure if the Z will fit the G....I will keep you all updated.

 

I believe my point is that the Top Secret Diffuser would be much more functional if used in conjuction with additional underbody trays because the diffuser itself leaves a huge gaping cavity under the rear of the car. Without the additional undertray it seems like it would be little more than an aesthetic enhancement. I cannot disagree that it may be a good starting / ending point.

 

WING!