RoyzMG wrote:I'm a little confused. Is that really a Miata rear differential. I'm used to seeing the large "bat wing" ears at the top of the differential.
Roy
From his pics it looks like they cut off the outer part of the wings and bolted through the upper part of the center section.
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RoyzMG wrote:I'm a little confused. Is that really a Miata rear differential. I'm used to seeing the large "bat wing" ears at the top of the differential.
Roy
From his pics it looks like they cut off the outer part of the wings and bolted through the upper part of the center section.
You are correct, this allows GBS to use the same Chassis Jig for both the Ford based model and Miata, all they have to do is change up the mounts. the aluminum on the Miata Diff is fairly easy to cut, took a hole 10 min to do, if that.
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Looks like gbs offsets the miata differential to center up the pinion flange in the trans tunnel. I was not aware that this would be ok with the miata tri-pot. Good to know.
I know I'm a bit late to the party, but am currently hunting around for examples of builds of the GBS Zero Mazda and MK Sportscars Indy RX-5. Any updates on the build? Did you ever consider the Indy RX-5? Lastly, it looks like there is no build manual for the GBS Zero Mazda. Is that true?
Rennkafer wrote: From his pics it looks like they cut off the outer part of the wings and bolted through the upper part of the center section.
You are correct, this allows GBS to use the same Chassis Jig for both the Ford based model and Miata, all they have to do is change up the mounts. the aluminum on the Miata Diff is fairly easy to cut, took a hole 10 min to do, if that.
Interesting. Wonder if an NC diff would also bolt up? But then how to get driveshafts from NC diff to NB hub/upright?
Feedback from GBS is no, an NC diff doesn’t fit. Something about an awkward shape. That’s why they stick with NB and Sierra diff options.
Well it has been a while since I updated this build, still a work in progress, albeit a slow progress. I have the engine on the stand and transmission has been cleaned up painted and new seals added. Front suspension including cycle wings and brakes have been test fitted, and then removed to have front panels wrapped, which has been completed so front suspension had been refitted and torqued. just need to reinstall front brakes then bleed them. Rear panel was also test fitted then wrapped, will get reinstalled in the next few weeks with reverse and rear fog lights attached. Fuel tank is in and strapped down I had custom tank made, as I was not permitted to buy from GBS so had to get it made here in Canada, I did increase it's capacity to 38L vs Stock 30L also added in tank fuel pump from FiTech 50015, plus the tank was built with a baffled Box in center so as fuel sloshes around there is about 4 liters that stays around the pump. Chassis wire harness is installed front to back I also changed the fuel lines from Nicopp to PTFE braided (Antistatic) fuel line. Now need to finish installing the last few interior panels then get the wiper motor and assembly installed then comes the windshield. Will also need to change the wiring connectors on my Miata ignition and stalks so they will work with the Chassis harness. Then get the engine cleaned and a refresh. so still have a ways to go but is getting there.
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Your comments about heim joints not being allowed on suspension components raises a concern for me, so I'll have to look into it further. All of my suspension arms have heim joints on them, including the trailing links for the rear solid axle. I hadn't heard of other BC builders having an issue with this, but perhaps I missed it.
As for Heim joints I think it will be up to your inspector, what there call would be. Since our area has a Head Inspector, and I know him through work I had a chat with him and he went and did some research and found Heim/Rose joints are not DOT approved, no one has tried to get them approved maybe, so cannot be used on suspension or steering for on road vehicles, but can be for off-road and racing applications. But like he also said it is not in the Inspection book or rules. So some inspectors may let it slide.
Fossil wrote: ↑December 27, 2024, 3:25 pm
Well it has been a while since I updated this build, still a work in progress, albeit a slow progress. .... I had custom tank made, as I was not permitted to buy from GBS so had to get it made here in Canada
You were fortunate to be able to get yours delivered on flat bed truck with Moffett. The freight center in Detroit couldn't find such a delivery option so I'm going the U-haul 12' trailer route.
It's not encouraging to hear slow progress. I went with the GBS Zero kit to make it easier. It will take long enough to assemble everything, I didn't want to also be fabricating little bits and pieces.
Why were you not permitted to buy the fuel tank from GBS? Some Canadian import thing? Fuel tank from GBS is included in mine. But, customs wants to open the crate and look at something, that's the hold up on mine.
Well as for slow progress that is totally on me, as I procrastinate and make changes too much. Custom parts are also due to wanting things done a certain way. GBS Zero is actually an easy to build unit especially now that they have a Manual.
With Fuel system It is a Canada law thing. Complete Kit cars "unbuilt" are not actually legal to import into Canada, but you are allowed to build a car from scratch as long as parts come from Canada. The exception is ordering a basic kit from a company like GBS, then purchasing everything else to complete it in Canada. Main things they want to see are Engine, transmission, drive line, brakes and suspension. Fuel system, tires, wheels, seats and steering, being purchased in Canada to complete the car. You have to send copies of your receipts to the provincial governing body that issues Vins, in BC that is ICBC, then once they approve you take it into an inspection facility and when unit passes they install Vin. As long as you follow the guideline it isn't really that bad just time consuming.
Just thought I would Add a couple pics of the inside of the fuel tank. the Black goop is thread sealant, as originally I was going to have gravity feed to high pressure pump, then decided to go in-tank fuel pump and needed to plug the hole. Excess goop was cleaned out after hole for in-tank fuel pump was made.
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