Front Splitter and Bumper combo

Rusty · 12-07-2020, 04:04 PM

Quote:

Originally Posted by Hotrodz

Cool, the pictures did not post.

victorofhavoc · 12-08-2020, 03:37 PM

Quote:

Originally Posted by Rusty

fixed the pictures!

static links look like they were broken

victorofhavoc · 03-22-2021, 04:07 PM

So I have totally neglected this thread, and I feel it's time for an update. I am super close to being done with the splitter! I decided to add diffusers, which further complicated my design!

So initially I ran into an issue with tracing the bumper accurately, especially considering there's some body damage in the bumper/fender area on the driver side, so it's sunken in by about an inch. There's also a bit of a chicken and egg scenario with mounting up plywood and choosing where to put initial mounts. This took me a lot of tinkering, but eventually I decided to use rivnuts and mount on the aluminum chassis support that goes to the crash beam. From here I used my Professional Awesome Racing quick releases to mount up the plywood, and trace out the bumper. I used a flexible pvc wall to make a vertical surface from the bumper down. After a ton of measuring I lined everything back up and traced out onto wax paper to make a half of the splitter, including the end to the axle. Once I had that, I traced onto the pvc wall to make a firm template, and then extended it 6 inches from every point to create the final sizing.

I then decided to go one step further and began designing diffusers to fit the splitter. I spoke with Professional Awesome and determined to go with a fairly large diffuser setup due to the size of the rear wing. I also decided that adding a gurney flap to the rear wing would be great for helping balance out the extra front end downforce that will exist. I began with the idea of the curved diffuser based on Pro Awe's design but scaled to 82.5% size to fit under the shorter bumper of the Z with the full intention of dumping all air into the wheel well. Unfortunately after a ton of time attempting to design this complex shape I almost gave up entirely. I decided to use CAD to try and design it then have it 3d printed. Unfortunately this proved too much for my cad skills so I decided to shape a more square diffuser that's 85% scale, but would still dump all air into the wheel well. The grey design below is the curved failure because I couldn't figure out how to get the multi-dimensional dynamic curvature to be concave on the upper surface with my limited CAD skillset. Instead I designed a secondary model that's in red below.

The final printed images turned out okay, but they had quite a bit of warping to them. I should be able to still make them work by gluing some steel to them, which was necessary anyway to prevent the epoxy/carbon mixture from sticking to the surface. Also, I had to split each into 2 parts so that it could be printed in the limited size of most 3D printers.

The final splitter shape has been cut, and the side winglets I made are looking pretty good! They still have to be cut to shape and eventually glued to the splitter itself, but that won't be long now! Mainly I just have to finish the diffuser molds and cut the foam to fit the diffusers exactly.

Rusty · 03-22-2021, 06:04 PM

Your splitter should go all the way back to the wheel openings. There, you should put uprights on the end of the splitter.

victorofhavoc · 03-22-2021, 07:50 PM

It goes all the way back to the front of the front axle.

The mounting so far is two quick release mounts at the chassis and two fiberglass rods with titanium pucks split at the front. Total 6 points of contact pulling up at a 1.226 square inch area each. The carbon is 5 layers and there's 6th layer of carbon Kevlar. The sum should be something like 22000 psi. Are you saying with this mounting you think there won't be enough support? I really thought there would be plenty and pro awe hasn't mentioned needing more mounting at this point. :/

Rusty · 03-22-2021, 09:50 PM

Quote:

Originally Posted by victorofhavoc

It goes all the way back to the front of the front axle.

The mounting so far is two quick release mounts at the chassis and two fiberglass rods with titanium pucks split at the front. Total 6 points of contact pulling up at a 1.226 square inch area each. The carbon is 5 layers and there's 6th layer of carbon Kevlar. The sum should be something like 22000 psi. Are you saying with this mounting you think there won't be enough support? I really thought there would be plenty and pro awe hasn't mentioned needing more mounting at this point. :/

I should have said wing tips, instead of uprights.

victorofhavoc · 03-22-2021, 10:06 PM

Quote:

Originally Posted by Rusty

I should have said wing tips, instead of uprights.

Oh, gotcha! Yeah, you're totally right! The black carbon in the last photo is what I plan to epoxy from the underside on the edges to form a 4x4" wing tip

.

Hotrodz · 03-23-2021, 01:08 PM

You ran into the same issue my shop did with those large diffusers. They had to shorten them and shave them down quite a bit to get them to work. They also lowered the splitter a little as well. I have not seen the finial setup LOL. Nice work!!!

victorofhavoc · 03-23-2021, 05:51 PM

Quote:

Originally Posted by Hotrodz

You ran into the same issue my shop did with those large diffusers. They had to shorten them and shave them down quite a bit to get them to work. They also lowered the splitter a little as well. I have not seen the finial setup LOL. Nice work!!!

The z bumper is very surprisingly short! It's only 16", so of course there's no way a full 20" diffuser would fit

. Lame, but that's okay! Share some pics of what it looks like when you have them! I'd love to see for comparison.

Hotrodz · 03-23-2021, 06:38 PM

Quote:

Originally Posted by victorofhavoc

The z bumper is very surprisingly short! It's only 16", so of course there's no way a full 20" diffuser would fit

. Lame, but that's okay! Share some pics of what it looks like when you have them! I'd love to see for comparison.

Will do!

Sent from my SM-G965U using Tapatalk

03-22-2021, 04:07 PM	#3 (permalink)
victorofhavoc Base Member Join Date: Oct 2011 Location: Kansas City Posts: 230 Drives: 2014 370z Rep Power: 14	Updated progress So I have totally neglected this thread, and I feel it's time for an update. I am super close to being done with the splitter! I decided to add diffusers, which further complicated my design! So initially I ran into an issue with tracing the bumper accurately, especially considering there's some body damage in the bumper/fender area on the driver side, so it's sunken in by about an inch. There's also a bit of a chicken and egg scenario with mounting up plywood and choosing where to put initial mounts. This took me a lot of tinkering, but eventually I decided to use rivnuts and mount on the aluminum chassis support that goes to the crash beam. From here I used my Professional Awesome Racing quick releases to mount up the plywood, and trace out the bumper. I used a flexible pvc wall to make a vertical surface from the bumper down. After a ton of measuring I lined everything back up and traced out onto wax paper to make a half of the splitter, including the end to the axle. Once I had that, I traced onto the pvc wall to make a firm template, and then extended it 6 inches from every point to create the final sizing. I then decided to go one step further and began designing diffusers to fit the splitter. I spoke with Professional Awesome and determined to go with a fairly large diffuser setup due to the size of the rear wing. I also decided that adding a gurney flap to the rear wing would be great for helping balance out the extra front end downforce that will exist. I began with the idea of the curved diffuser based on Pro Awe's design but scaled to 82.5% size to fit under the shorter bumper of the Z with the full intention of dumping all air into the wheel well. Unfortunately after a ton of time attempting to design this complex shape I almost gave up entirely. I decided to use CAD to try and design it then have it 3d printed. Unfortunately this proved too much for my cad skills so I decided to shape a more square diffuser that's 85% scale, but would still dump all air into the wheel well. The grey design below is the curved failure because I couldn't figure out how to get the multi-dimensional dynamic curvature to be concave on the upper surface with my limited CAD skillset. Instead I designed a secondary model that's in red below. The final printed images turned out okay, but they had quite a bit of warping to them. I should be able to still make them work by gluing some steel to them, which was necessary anyway to prevent the epoxy/carbon mixture from sticking to the surface. Also, I had to split each into 2 parts so that it could be printed in the limited size of most 3D printers. The final splitter shape has been cut, and the side winglets I made are looking pretty good! They still have to be cut to shape and eventually glued to the splitter itself, but that won't be long now! Mainly I just have to finish the diffuser molds and cut the foam to fit the diffusers exactly. JARblue, Rusty, Hotrodz and 1 others like this. __________________ Had a 2010 WRX- boy was it quick in a straight line, got a 2014 Z- man is she grippy in the corners-- then left the Z and later got a GTI, now back in an 09 racecar Z!

03-22-2021, 06:04 PM	#4 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 69 Posts: 35,379 Drives: 2011 Nismo GM 6M Rep Power: 2684438	Your splitter should go all the way back to the wheel openings. There, you should put uprights on the end of the splitter. Sharad909 likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

03-22-2021, 07:50 PM	#5 (permalink)
victorofhavoc Base Member Join Date: Oct 2011 Location: Kansas City Posts: 230 Drives: 2014 370z Rep Power: 14	It goes all the way back to the front of the front axle. The mounting so far is two quick release mounts at the chassis and two fiberglass rods with titanium pucks split at the front. Total 6 points of contact pulling up at a 1.226 square inch area each. The carbon is 5 layers and there's 6th layer of carbon Kevlar. The sum should be something like 22000 psi. Are you saying with this mounting you think there won't be enough support? I really thought there would be plenty and pro awe hasn't mentioned needing more mounting at this point. :/ __________________ Had a 2010 WRX- boy was it quick in a straight line, got a 2014 Z- man is she grippy in the corners-- then left the Z and later got a GTI, now back in an 09 racecar Z!

03-23-2021, 01:08 PM	#8 (permalink)
Hotrodz A True Z Fanatic Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684385	You ran into the same issue my shop did with those large diffusers. They had to shorten them and shave them down quite a bit to get them to work. They also lowered the splitter a little as well. I have not seen the finial setup LOL. Nice work!!! Rusty likes this. __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

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