V1 Seb's Goblin #454 (2008 SS/TC donor) - Registered

[OptimizePrime]

A tuned z54 with stock wheels will be roasting those tires. I was skating on the k04. Maybe wait to see how you like the setup before spending money/time/effort making them look nice? My vote on the wheels, if you were to do them, would be all black with the blue stripes like you have in the render (with black lug nuts).

Front diffuser/windscreen/hood latch look incredible!

 

[Sebnuts]

A tuned z54 with stock wheels will be roasting those tires

Yea, the thing has enough power to roast street tires in any gear at any speed.

I'm thinking these will be my daily drivers. If I ever want to get serious about track stuff, I'll get new wheels and tires specifically for that.

 

[Sebnuts]

Got all if my mounts lined out, I think I'm ready for powder coat.
The hood latches and "fender" mounts are all slotted and adjustable in all directions so I can get my body lines/gaps adjusted

The hood is ready to send off for finishing, but I still need to fix the "dash" and epoxy these mounts on

 

[Sebnuts]

Got the front splitter gurney flaps bent on the press at work, went with 30°. Will be dropping everything off at the powder coater tomorrow.

 

[Sebnuts]

My new seats came in earlier this week. I can't actually mount them because the mount plates are at the powder coater, but I threw them in the approx location to see what kind of shoulder harness bar height I'll need.

I've seen multiple diagrams that say 20° is the max angle you want here, but I've also seen some that say 10° is the max, and yet some others that say up to 45° is "acceptable".

If I wanted to get it horizontal, I'd need to raise it about 3", which would require relocating the overflow tank.

I'm thinking it's good enough as is - anyone with more experience disagree?

 

[Desert Sasqwatch]

I believe the general consensus for any competition safety check is 10 degrees - at least that's what I've seen in the SCCA rule book, if you plan to track your car. Some autocross events will allow the donor 3 point seatbelts, but that may only apply to vehicles with doors with windows(?). Other ruling bodies may have other rules for the harness angle base on the vehicle.

Is that how far forward your seat will be when driving? If the seat is moved backward at all the harness angle will increase. Knowing how much effort you've put into your build I would have think a better mounting point for the harnesses is in the works?

Edit: I'm used to sqwatch seats being all the way back against the b-pillar diagonal bar.

 

[Sebnuts]

Is that how far forward your seat will be when driving? If the seat is moved backward at all the harness angle will increase. Knowing how much effort you've put into your build I would have think a better mounting point for the harnesses is in the works?

Yea, that's basically where the seat will be with me as the driver. I'll probably wait until I get them mounted and do a final check though before making any final decisions.
If I do decide to add a harness bar, it looks like mounting it into the 3 tabs that are typically used for mounting the engine cover will be at just the right height - I'll just have to space out the coolant tank.

 

[Robinjo]

Some autocross events will allow the donor 3 point seatbelts, but that may only apply to vehicles with doors with windows(?).

My autocross region allowed the stock belts but I’m in the stock seats still.

 

[Sebnuts]

Ordered some "metalized" brushed aluminum decals to try out on some new center caps

Looks OK from a distance, but not great up close. The bigger issue is it doesn't seem like it stuck very well to that smooth plastic.
I may experiment with scuffing up the plastic then shooting some clear coat over the whole thing.

I also found a shop on etsy that makes an actual 1mm thick metal sticker, may try those out as well.

 

[Sebnuts]

Too cold to work on the goblin this weekend, but I think I'm happy with this shoulder harness relocation solution

Bolt some plates onto the existing mounts and use some quick disconnect hardware from Summit

Also got a call from the powder coater this afternoon saying my windshield frame and various other parts are ready for pickup $$

 

[Desert Sasqwatch]

Nice. Need to see a photo or two of this mounted!

 

[jirwin]

Too cold to work on the goblin this weekend, but I think I'm happy with this shoulder harness relocation solution
View attachment 44834

Bolt some plates onto the existing mounts and use some quick disconnect hardware from Summit
View attachment 44835

Also got a call from the powder coater this afternoon saying my windshield frame and various other parts are ready for pickup $$

Are the things you're bolting the seat belt things to going to prevent the use of the engine covers? If I'm understanding it correctly, it goes onto the drivers side mount for the coolant res, and the matching one on the passengers side?

 

[Gtstorey]

I have doubts that those mounts will hold up to severe impact. No calculations to prove it, but a lot of leverage will be applied.

 

[Sebnuts]

Are the things you're bolting the seat belt things to going to prevent the use of the engine covers?

Maybe. I don't have the DF engine covers, I don't like how they look when cut up for the A2W intercooler on the TC cars. I'm planning to do some kind of custom cover so I'll be able to work around them either way.

If I'm understanding it correctly, it goes onto the drivers side mount for the coolant res, and the matching one on the passengers side?

That's correct.

 

[Sebnuts]

I have doubts that those mounts will hold up to severe impact. No calculations to prove it, but a lot of leverage will be applied.

It looks like most specs require each anchor point to handle 1500lbs. I will do some calcs/simulation to see what kind of stresses and deflection occur in the mount with these loads.

 

[Gtstorey]

Is that 1500 per mount or per strap?

 

[Sebnuts]

Is that 1500 per mount or per strap?

1500 per anchor point, so 1500 per strap (each mount would need to handle 3000lbs).

 

[Gtstorey]

That's getting up there pretty good. Is the 1500lbs including any safety factor? 3000 lbs will definitely deform anything less than something 1/2" thick as drawn in. Might not reach ultimate failure with something thinner, but I'm a little worried about weld failure on the DF mount.

And if it the 1500 per strap doesn't include a S.F. (expected load of 1500lbs might be with S.F. since I guess if the strap actually sees 1500 each you are dead anyway) then I would be surprised if it can handle any appreciable safety factor on top.

But it has been a lot of years since I've ran those type of calculations in detail.

 

[Sebnuts]

And if it the 1500 per strap doesn't include a S.F. (expected load of 1500lbs might be with S.F. since I guess if the strap actually sees 1500 each you are dead anyway) then I would be surprised if it can handle any appreciable safety factor on top.

1500lbs per anchor point with a yield FOS of 1 is my understanding.
Without knowing what material DF used there, I'll assume something on the low end like A36 with a yield strength of 36ksi for my analysis.

 

[Gtstorey]

Yes, I would assume A36 since there is no reason for them to have used anything stronger. What is the thickness of what they used? 1/8"?