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Old 10-21-2018, 09:51 PM   #111
John V
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Haha that's not how I intended it.

It's so fun learning new skills, there are lots of "a ha!" moments. I don't know why I didn't get a welder sooner and just start screwing around with it.
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Old 10-21-2018, 11:44 PM   #112
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Quote:
Originally Posted by John V View Post
Haha that's not how I intended it.

It's so fun learning new skills, there are lots of "a ha!" moments. I don't know why I didn't get a welder sooner and just start screwing around with it.
OTOH, just because it looks good doesn't mean it is good.
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Old 11-04-2018, 09:14 PM   #113
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I finished my transmission crossmember. I got a better feel for the welder and got better penetration on the later welds.









A little primer and paint and they're pretty much done.







I recessed nuts that I tack welded into the reinforcement plates, so it's super easy to install and remove the crossmember.





I also got my rear suspension parts from the fabricator. Converted to spherical bearings, and the toe and camber arms changed to turnbuckles to eliminate the cam bolts, which tend to slip. Simple to make.



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Old 11-04-2018, 09:14 PM   #114
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Turbo setup came in as well. I had some nervousness about it not fitting, but everything cleared. Bonus.





And I got a limited slip diff to put into my Explorer rear end. DIdn't change the gear ratio, so I just pulled the bearings and installed them on the new LSD, and swapped the ring gear over.

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Old 11-11-2018, 08:50 AM   #115
John V
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Starting to figure out the cooling system. Nothing really lines up the way it did in the Miata. Annoyingly, the hot side of the radiator is on the opposite side of the engine bay as the coolant exit from the engine, so the coolant pipes have to cross over. I could probably change this, but it would require a custom radiator to make the air bleed and overflow piping to work correctly, and I'd rather not re-engineer that.

Anyway, coolant exits the cold side of the radiator on the passenger's side, then uses this short section of steel pipe to carry water to the water pump inlet on the driver's side. Because the engine is so far forward relative to a Miata the bend was entirely wrong. So I cut it and re-welded it in a different orientation. Nice little half hour job that saved me a lot of time searching for the perfect cooling hose.



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Old Yesterday, 01:14 PM   #116
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I don't think anyone is reading this thread anymore, but what the heck

I have made progress on a bunch of little things over the past month. I pulled the engine so I could finish building the oil and fuel systems, install cams, swap the crank pulley over, and re-time the engine. No pictures of any of that, because my hands were covered in cam lube and I didn't feel like getting my phone dirty.

I finished the important part of the wiring as well. The MR-Spyder power steering pump is wired in with a dedicated 4AWG wire from the battery, which will be behind the driver's seat.

Most of the interesting stuff was finishing up the fuel system, which was something I'd never done before. I ran E85 on my last car, but I never changed the fuel system (other than the pump and injectors) to accommodate it. The RX-8's stock fuel lines are about 5/16, which is probably sufficient for the power levels I'll be running but I wanted to create a return-style fuel system that never existed on an NC or an RX-8, so it necessitated some plumbing changes. I ended up deciding on a new 3/8" (-6AN) PTFE feed line from a new fitting at the fuel pump, to a 10 micron filter, to a flow-through fuel rail with an external rising-rate (1psi fuel pressure increase for each 1psi of boost pressure) fuel pressure regulator. I also wanted an ethanol sensor in the return line so I picked up a standard GM (Continental) sensor.

The PTFE fittings are a little bit weird to work with until you're used to them. Lots of band-aids were needed.

Flow-through fuel rail with 6AN fittings on each end.



Feed line is 6AN through a 10 micron filter mounted in the trans tunnel, and 6AN all the way back to the pump. The stock feed line is used for the return. I put the E85 sensor in the return line.





I turned a simple plug to defeat the pressure relief valve in the RX-8 fuel pump assembly. This is normally where the fuel pressure is set in a stock vehicle.



Bulkhead fitting with a 3/8 barb inside the pump assembly and 6AN on the outlet. The barb connects right to the barb fitting on the pressure side of the pump. The stock siphon mechanism is preserved.


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Old Yesterday, 01:53 PM   #117
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I'm still reading! This is fascinating.
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Old Yesterday, 02:33 PM   #118
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Me too
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Old Yesterday, 03:51 PM   #119
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Hell yeah, me too.
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Old Yesterday, 04:22 PM   #120
John V
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Ok well thanks for making me feel better.
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