Homemade Splitter Design and Mounting
#21
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Maybe I'm seeing it wrong but maybe making it angle toward the ground would make more sense to me but again I'm not a track *****.
Still one of the best aero references on the net: http://www.mulsannescorner.com/
Last edited by betamotorsports; 11-20-2012 at 04:27 PM.
#22
My 2 cents:
Just go with 1/2 ply painted black till you get the height etc right.
Weld 2 tabs on the subframe to mount the back of the splitter (buy a mig140 and learn how to weld, princess auto or canadian tire - it's pretty useful when messing with your z - welding is a skill so you need to know your limits - but after a few practice runs you should be able to weld some 1/8 plate to the front of the subframe )
Buy 1/4 treaded rod and run it down from the bumper behind the grill to the splitter. You can just see it if you look carefully in the attached photo. I used 4, 2 you can see.
I don't like the supports that run outside the grill.
My setup holds me standing on it. With the downforce spread over the entire surface it doesn't flex or droop at speeds over 200kph.
The aluminum on the front is a little ghetto and I've messed with it a few times to fill the gap. I can clean it up with a single strip but it works for now. A V2 bumper likely won't need this treatment unless you drop the splitter lower.
Total cost about $75. Weight about 15lbs.
Good luck.
Matt
Just go with 1/2 ply painted black till you get the height etc right.
Weld 2 tabs on the subframe to mount the back of the splitter (buy a mig140 and learn how to weld, princess auto or canadian tire - it's pretty useful when messing with your z - welding is a skill so you need to know your limits - but after a few practice runs you should be able to weld some 1/8 plate to the front of the subframe )
Buy 1/4 treaded rod and run it down from the bumper behind the grill to the splitter. You can just see it if you look carefully in the attached photo. I used 4, 2 you can see.
I don't like the supports that run outside the grill.
My setup holds me standing on it. With the downforce spread over the entire surface it doesn't flex or droop at speeds over 200kph.
The aluminum on the front is a little ghetto and I've messed with it a few times to fill the gap. I can clean it up with a single strip but it works for now. A V2 bumper likely won't need this treatment unless you drop the splitter lower.
Total cost about $75. Weight about 15lbs.
Good luck.
Matt
#23
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iTrader: (21)
Hey OP, I have made two different home made splitters for my car. As someone else on here said, they had to lower it to clear the sway bar. Originally I wanted to mate it to the bottom of the bumper, but I found that to be too high because it hit the sway bar. I have the OEM bumper and it is not perfectly flat on the bottom so there were gaps on both sides , therefore defeating the purpose of the splitter. I had to lower mine which created a gap between the bumper and the splitter so I ended up making an air dam too.
I made some brackets out of that garage door tracting stuff you can get from the hardware store and mounted them to the backside of the crash bar. They went down from there to the splitter and attached using "L" brackets. I also used all thread screwed into the bottom of the core support and down to the splitter. Then in the front I have four more pieces of all thread that go into a ball joint rod end. Those attach to brackets mounted to the front of the splitter and the crash bar.
I got a lot of parts for this from this place:
http://www.mcmaster.com/#rod-ends/=k9vbq9
Here are some pics of mine when I was making it. It is off the car right now and I will be putting it back on soon. I will get some more pics of the way its mounted when I put it back on. Also, it is strong enough to stand on.
I made some brackets out of that garage door tracting stuff you can get from the hardware store and mounted them to the backside of the crash bar. They went down from there to the splitter and attached using "L" brackets. I also used all thread screwed into the bottom of the core support and down to the splitter. Then in the front I have four more pieces of all thread that go into a ball joint rod end. Those attach to brackets mounted to the front of the splitter and the crash bar.
I got a lot of parts for this from this place:
http://www.mcmaster.com/#rod-ends/=k9vbq9
Here are some pics of mine when I was making it. It is off the car right now and I will be putting it back on soon. I will get some more pics of the way its mounted when I put it back on. Also, it is strong enough to stand on.
Last edited by Fixxxercask; 11-22-2012 at 04:28 AM.
#24
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Authentic Nismo V3
ZSpeed undershroud
$950 plus shipping and handling
Other platforms are not as aerodynamic as the Z hence all the work around to get 'aero'!
In for the finish of this project nonetheless...
ZSpeed undershroud
$950 plus shipping and handling
Other platforms are not as aerodynamic as the Z hence all the work around to get 'aero'!
In for the finish of this project nonetheless...
#27
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there will be hundreds of pounds of down force on the front splitter,
Remember, down force generated under the car creates a pressure load on the top of the car body, not on the panels underneath the car.
#29
I forgot to add some of those posts were super helpful.
I am still hoping someone can post pics of the posterior support. But the welding on of tabs sounds like a great idea I never thought of.
Can you post more pics of this?
And the sway bar. How much would you recommend I clear it by in it's static position to be safe?
Are ou guys able to load up onto a trailer with the splitter on? Or do you attach it at the track everytime? I'm betting on the second option.
I am still hoping someone can post pics of the posterior support. But the welding on of tabs sounds like a great idea I never thought of.
Can you post more pics of this?
And the sway bar. How much would you recommend I clear it by in it's static position to be safe?
Are ou guys able to load up onto a trailer with the splitter on? Or do you attach it at the track everytime? I'm betting on the second option.
#30
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Not trying to be the devil's advocate towards DIY. I'm all about DIY, just want to know more about how a splitter will provide more downforce than a Nismo v3 bumper.
#31
Hard to say because those of us who make them don't have wind tunnels and scales.
But I saw a picture of GT-Rob on a track and he had a splitter made of 1/2" thick oak plywood, wrapped in Carbon Fibre and he hadn't quite ironed out the side support yet.
The oak plywood was warping downward on the side.
That takes a lot of weight. A lot!
But I saw a picture of GT-Rob on a track and he had a splitter made of 1/2" thick oak plywood, wrapped in Carbon Fibre and he hadn't quite ironed out the side support yet.
The oak plywood was warping downward on the side.
That takes a lot of weight. A lot!
#34
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Well.... generally no if the splitter is working as a splitter. The down force load from a properly designed splitter is carried by the body of the car (same is true for a rear diffuser). If the splitter is really a spoiler then you can see that kind of load on the exposed front edge.
Remember, down force generated under the car creates a pressure load on the top of the car body, not on the panels underneath the car.
Remember, down force generated under the car creates a pressure load on the top of the car body, not on the panels underneath the car.
#36
Compressed air is basically ramming down onto a shelf from top to bottom.
It is more complex than this. But this will give you the idea people are going for.
#40
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lmao
I like the picture reference
and
Rather see you car look like the rx7
I always thought what Zspeed did was genius. If I had the resouces which I don't it takes months to rise a v3 wing here on island ...
I would lengthen the mustache piece/apr splitter, and mount it below the bumper. Adding 6 turnbuckles 3 on each side of fascia...
in for more
I like the picture reference
and
Rather see you car look like the rx7
I always thought what Zspeed did was genius. If I had the resouces which I don't it takes months to rise a v3 wing here on island ...
I would lengthen the mustache piece/apr splitter, and mount it below the bumper. Adding 6 turnbuckles 3 on each side of fascia...
in for more