Jump to content
HybridZ
miky360

My Carbon Fibre 280z!

Recommended Posts

Posted (edited)

Just wanted to share my Z now that it's finally back from the body shop! Meant to say 4 months for most of my front end instead of 6. Just camera shy and stuttered. Didn't realize it till editing ahaha. The car will be weighed very soon and we estimate about 200-225lbs removed including the stripping of the interior. What else are you guys doing to your Z's to shed weight?  

 

This car has more carbon than Rocky Autos Z that was featured on Speedhunters some years back. And I haven't even ordered my dash yet! 

 

 

Edited by miky360
  • Like 1

Share this post


Link to post
Share on other sites

Is this a weight weenie build, or more just for kicks? Just asking since you started with the worst year you possibly could lol.

 

Are the doors for a '78, or are they for the earlier cars? Given how heavy '78 doors are, I bet you lost a good amount of weight there. Surprised you didn't go with carbon bumpers + aluminum brackets as well. If you're looking for some more weight to lose, I'd suggest taking out the impact bumper supports. I plan to do that on my '76 chassis. I have a series one chassis that I want to strip down and weigh to compare against my bare '76 as well.

 

Let us know what the final weight is, I'm very curious.

Share this post


Link to post
Share on other sites

Started off as just a nice street cruiser then it was time to paint the car since rusted started to form. Got quoted $12,000...... it was literally cheaper to buy carbon replacement panels and just have the main shell painted lol. I was on the fence for lightweight bumpers but I really don’t like that look. I really preferred the classic chrome bumper look. I never thought of replacing those front bumper brackets to aluminum actually. Maybe the shop could makeshift me one!

 

The doors themselves are for a 78. I was so worried about Restored.jp getting it wrong because they didn’t technically receive a 280z in Japan. Luckily it was a perfect fit.

Share this post


Link to post
Share on other sites

Thank you! Unfortunately, I won't be making it for the swap meet :( It's being sent off for floors, frames, and seat brackets in a couple weeks.

 

@EF Ian Oh no way! I actually had no idea. I guess that's on my next order! I was playing with the idea of getting the CF ones then having them wrapped in chrome but it's still nowhere near as having real chrome.

Share this post


Link to post
Share on other sites

Its more expensive than it is to chrome a metal one due the process taking more time as before the nickel and chrome go on it needs 3 or 4 coats of conductive copper paint applied with sanding smooth in beetween each coat. 

 

Good choice staying chrome, you need it to break up the carbon fibre and to help make the carbon stand out.

 

 

 

 

This bumper here is an FRP one that has been chromed, as you can see, you couldn't tell it wasn't a metal one. 

 

Chromed%20FRP%20Bumper%201.jpg

Share this post


Link to post
Share on other sites

I had the same idea!  It's funny how cf is cheaper than paint. lol I couldn't tell in the video but what did they do to your roof? The doors look cool but are you concerned with side impact? Here's mine:

 

20180120_134601.jpg

Share this post


Link to post
Share on other sites

@Arif Very nice! I've only seen your car through retro-specs pics. Was very jelly that you got yours first before me ahaha. It used to have a sunroof but then I just had the a roof made of CF instead of just plugging it with a metal sheet and risk warpage. I'll make another video soon of better detail. 

 

@EF Ian Naw, if it's not actual carbon, I don't want to fake it. Saw some guys on youtube who did carbon quarters. Thinking of driving down to them and possibly ask them if they're willing to do mine heheh. But that's probably not until phase 2 of the car. 

Share this post


Link to post
Share on other sites
2 hours ago, EF Ian said:

How about getting the rest of the car skinned in carbon fibre so it looks like the whole car is carbon fibre?

I saw this 370z at Zdayz a few years ago and talked to the owner. The main body was skinned but he said because the car flexed the carbon fiber has small cracks in it. I'm sure there is a way to do it but that's a big commitment with no guarantees later on. The s30 flexes way more than a 370z so that might be an issue.

20160521_123757.jpg

20160521_124749.jpg

Share this post


Link to post
Share on other sites

Fair enough. 

 

Don't take this as me criticising you, its not, just asking a question. I assume you've jut had the car painted, and therefore you chose the blue? How come you went with blue instead of going for a dark grey to match the carbon fibre, from far back it would look all one colour but up close you would notice the lovely carbon fibre parts. For me the main part that stands out too much is the blue under the doors.  

Share this post


Link to post
Share on other sites
12 minutes ago, miky360 said:

@Arif Very nice! I've only seen your car through retro-specs pics. Was very jelly that you got yours first before me ahaha. It used to have a sunroof but then I just had the a roof made of CF instead of just plugging it with a metal sheet and risk warpage. I'll make another video soon of better detail. 

 

Ah ok that makes sense on the roof. Are you concerned with the  lack of side impact protection of the CF doors?

Share this post


Link to post
Share on other sites
6 minutes ago, Arif said:

I saw this 370z at Zdayz a few years ago and talked to the owner. The main body was skinned but he said because the car flexed the carbon fiber has small cracks in it. I'm sure there is a way to do it but that's a big commitment with no guarantees later on. The s30 flexes way more than a 370z so that might be an issue.

Thats a valid reason for not doing it, I didn't actually think of that as you tend assume body panels wouldn't flex much, but for sure there is a lot of flexing goes on with S30 at the rear quarter panels as they lead up to the roof.

 

 

 

 

3 minutes ago, Arif said:

Ah ok that makes sense on the roof. Are you concerned with the  lack of side impact protection of the CF doors?

That should be an area for concern, however while there is side protection in the stock doors, its still very poor so you might not be loosing too much protection.

Share this post


Link to post
Share on other sites
48 minutes ago, EF Ian said:

That should be an area for concern, however while there is side protection in the stock doors, its still very poor so you might not be loosing too much protection.

Depends on the year. For a 240, it's almost nonexistent. 73-76 cars have a door beam added to the door, which is actually pretty beefy, it's about 10lbs worth of steel. 77-78 had the door jamb redesigned for side impact safety, and it's probably safer than you think. Not on the level of a new car, though, obviously.

Share this post


Link to post
Share on other sites

@EF Ian The original plan was to do slate grey like on the older 911s to flow with the carbon but I knew overtime with the amount of sun exposure it's going to get that the carbon is going to fade over time. So I just decided to go with the blue then later down the line, when its time, paint the rest of the car blue. I also used to have another blue 280z and they just look sooooo goooood in blue ahah

 

@Arif Yeah impact was definitely a thought in mind. A cage is being tossed in the brainstorm bubble but I also have another idea in mind that may or may not work. I've never seen anybody do it yet so I'll be making a future post about it soon on my experience. Don't want to say anything JUST yet because it's gonna get a lot of criticism because it's a pretty new idea. 

Share this post


Link to post
Share on other sites
1 hour ago, miky360 said:

 

@Arif Yeah impact was definitely a thought in mind. A cage is being tossed in the brainstorm bubble but I also have another idea in mind that may or may not work. I've never seen anybody do it yet so I'll be making a future post about it soon on my experience. Don't want to say anything JUST yet because it's gonna get a lot of criticism because it's a pretty new idea. 

After reading rturbo 930's response I want to look at pulling the skin off my doors and then possibly overlay cf onto the frame. I'm not sure if that would work but it does have me thinking about how to make it work. I'd be interested to see what you come up with as well.

Share this post


Link to post
Share on other sites
6 hours ago, OldAndyAndTheSea said:

If you have any questions in regards to carbon construction, and safety, don't hesitate to ask. I'll gladly share anything that I know.

 

 

How would you construct a carbon fiber door without a cage in the car? Consider that it's a street car with some track time.

Share this post


Link to post
Share on other sites
Posted (edited)

Without a cage, or monocoque design, quite frankly, I wouldn't.

 

But if you want to go down the rabbit hole, you must include some sort of load bearing/dispersing core within the laminate. Most F1 racecars are constructed from a combination of aluminum, and nomex, honeycomb core. Aluminum is best used for crumple zones, and is highly structural, while nomex is designed for excellent fire resistance, but isn't as structurally robust. Nomex is significantly lighter, and subsequently more expensive, than aluminum, so it is used only where advantageous. So the survival cell (Monocoque) sees this type of core most often.

 

 

I'd build a totally composite version, with aluminum honeycomb (3-5mm) core. Imagine if you were to take an s30 door and cut the inside skin off. I'd make that idea, and then build a semi structural door panel that goes over the inner workings of the door, because I also would want to retain window function and such.

 

Horrible description, but eh I'll roll with it.

 

 

I really dislike the idea of making some bastardized door hybrid out of 40+ year old existing shells and single skin, hand laid, laminates. That's not safe. Nor is it truly using these materials as intended.

 

It's like if someone decided to build a carbon fiber house...and they start by making a bunch of carbon fiber 2x4s.....sure that will work, to some extent I suppose, but it isn't using the materials to their advantage.

 

Unless the person really knows these materials (at an Aerospace / ISO 9001 level) you really shouldn't be making your own doors, in my opinion.  

 

Not the task for the average body guy.

 

I feel this is an aesthetics game, hidden beneath a "weight savings" veil.

 

 

Edited by OldAndyAndTheSea

Share this post


Link to post
Share on other sites

Having played with that honeycomb aluminum, that material is pretty interesting. Lots of structure in the comb direction, you could stand on the material. Super trippy standing on the edge of aluminum foil thick material. Any side load though and it would collapse to the couple sheets thickness of aluminum foil that it was. It used to be pretty prohibitive to find, our supplier was a friend's dad who worked at boeing who bought it from their surplus section. 

 

It can support a ton of weight in the tubular direction. The question we had in our application was getting it to fit around curvatures, how to make it thin enough without shredding it, and how to try and keep the resin out of the combs as that would be overall additional weight. Thoughts of adding foam to keep the combs from collapsing, but in the end just a fiber glass structure core was used to support load. 

 

Huge aside, but you don't get a chance to talk about that material too often. 

 

For the doors, is it because to do it right there wouldn't be much weight savings? Add carbon, add core material, add resin etc. Therefore people who consider it as a weight savings aren't really planning on doing it right?

Share this post


Link to post
Share on other sites

A thought to consider.

 

Singer, a car modifier who creates some of wildest 911's out there, remove all of the exterior body panels that are made of steel and replace them with carbon fiber...EXCEPT for the doors.

 

Their cars are well into the 6 figures, so it's not like they just didn't get around to it. 

 

I do not know  the reason for them not do it. It could be a safety thing, or possibly a legal issue, But even they don't.

 

Personally, I wouldn't. There's a lot of other areas to lose weight on the car if that's what you're after.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×