magnumP5's RX-7 Build Thread

Don't use your high beams. Seriuosly though, that is weird. I have no clue what is going on with that.
 
Don't use your high beams. Seriuosly though, that is weird. I have no clue what is going on with that.
Yeah, I still haven't been able to track it down. I don't use my high beams very much, if at all, so I'm not too concerned at the moment.

The battery tray is all welded up and in the process of being coated with rubberized underbody coating. I figured it was a good, durable, and NON-CONDUCTING coating to use.

Pictures of tray mock up before coating:

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That's all for now.
 
I approve.

Haha! One thing's for certain, this battery shouldn't be going anywhere! The tray is in the final painting stages right now. The rubberized coating was not and thick but it comes off way too easily so I slapped a couple layers of satin black Krylon over top. I might add a couple coats of clear tonight to make it a little more durable.

While waited between coats I decided to destroy my fuel system. Stock fuel pump assembly:

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Mazda really crammed a lot of crap onto that little fuel tank lid. Somewhere in there I need to add another bulkhead connector for the fuel pump (stock wires are too small). Since I really couldn't find a good space with the stock arrangement I decided to redo the whole thing. I'm going to try to keep the existing lid, replace the fuel inlet/outlet with AN fittings and squeeze the new connector in there. I should be able to make some more room by rotating the AN fittings away from the stock orientation. The fuel pump assembly stripped and ready for cutting:

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I stopped last night after I had cut off the stock inlet/outlet tubes and drilled the holes large enough to accept -6 AN fittings. I've already ordered the fittings (from Summit) so hopefully I'll know if this will all work in a few days.

In other news... MY INTAKE MANIFOLD IS DONE!!! I should have it in a couple days!
 
Yay cant wait to see pics of the manifold!


It should be on its way now. I was in PayPal last night and I realized I sent the downpayment for the intake manifold on October 8, 2011! Apparently I'm a patient person...

In other news I have a package FedEx tried to deilver from some place in MI. I don't remember ordering anything from MI. It's sad when you order so many parts you can't keep track of them all...

I finished the battery tray a couple days ago but I was able to get online yesterday. Pictures below of the tray before I installed it yesterday:

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The "ashy" looking stuff on the tray is actually light being reflected by the "satin" clear I sprayed on it to try to make the finish a little more durable. Unfortunately no pictures in the car as it's hard to get a good shot back there (dark).

I worked on the fuel system a little last night. The parts from Summit came in (one of the perks of being in OH) so I tested out the fittings.

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I had to modify the pump support "slightly" to get the return fittings to fit. Unfortunately no one sells a female 6 AN to 5/16" barb fitting so that's why there is a female-to-female adatpor in there. 5/16" is required because that is the outlet diameter of the fuel pump (if only it were 3/8"). The new bulkhead connector should fit on the other side of the feed line just behind the existing connector. I'll be working on that tonight. Once the fuel pump, submersible fuel line and fuel-safe clamps come in I'll be done with the fuel pump assembly.
 
Waiting on parts/supplies so I didn't get a whole lot done over the weekend.

The new fuel pump came in on Friday:

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It's slightly annoying Aeromotive "recommends" 10 ga wire for the fuel pump, yet the pigtail harness they sent me has like 16 ga wire. What gives? Since the pump current draw should always be <20 amps I'm actually going with 12 ga wire.

Speaking of wiring, I got the new bulkhead connector in. As you can see it's a tight fit!

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I was unable to find any connectors with anything larger than 14 ga wire so this one will have to do. It has four wires and I'm dedicating two for power (red and blue) and two for ground (black and grey/purple). This should keep the voltage drop to the pump as low as possible.

I'm still waiting on:
-12 ga Mil-Spec wire
-2 feet of 5/16" submersible fuel line
-Fuel line clamps (not worm clamps!)
-40 feet of -6 AN braided stainless steel line ($$$)
-Aeromotive fuel filter
-Too many hose ends and misc fittings to count

I also need to find a 1.25" diameter grommet with a .25" hole for the fuel tank service cover since I destroyed the stock one and I can't find a part number anywhere.
 
All the fuel system parts are in (pictures later) and I finished re-wiring the fuel pump system. The pump now has 12 ga from the fusebox to the relay and then from the relay to the pump. I had to take a slightly different path since the dash is in so the new wire runs along the passenger's side with the antenna cable, which then crosses over to the driver's side to the strut tower. It's not perfect but I'm not going to tear out the interior again just to install one wire. I'll save the rest of the wiring clean up for if/when the car is stripped for full track duty.

Intake manifold should be here today or tomorrow! My wife has a friend visiting this weekend so I will have lots of "alone time" with the RX-7 to get stuff done.
 
Moderately large update!

I got a bunch of parts in Friday. More on those later...

I got the fuel pump assembly completed. I'm still not sure about the foam/rubber sleeve but I'll pull it in a few weeks to see how it's holding up - it's ~1/4 submersed in gasoline. THe worst case scenario is it swells and turns to mush and I'll just fish it all out of the tank and strap the fuel pump straight to its support.

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That was about as far as I made it Friday night. I didn't get home from work until 6 PM and we had company over so I really couldn't stay out in the garage all night.

I got up bright and early on Saturday and went out and attacked the stock fuel lines. They fell before me. There's really not a whole lot there. I'm going to try to reuse the stock brackets with a little modification to hold everything in place. Something about brake lines swinging around makes me nervous...

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Here's what's replacing the stock hardware:

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I ended up making a bracket to mount the FPR since I couldn't find a flat spot on the firewall. It's bare steel for now, but I will be painting it black for corrosion resistance.

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The new fuel filter actually fit in the stock location using the stock bracket. It's a little smaller in diameter than the stock filter but I added some foam insulating tape to the stock bracket and everything is nice and snug.

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You can see the lines in the picture above. Apparently I was a little too optimistic about the fittings and I'm going to need some 90 degree hose ends rather than the straight ends I purchased. I'll likely have a good amount of -6 AN hose and some straight hose ends left over so let me know if you're interested. So the fuel system project had to be put of hold for a few days but that's okay because I also had THIS to play with!

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My custom aluminum intake manifold finally arrived! The port sizes are matched to my throttle bodies and engine. Some quick mock-up pictures on the new engine parts:

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I noticed the throttle body sat really close to the front iron so I grabbed the alternator ot make sure everything fit:

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Sure enough there's some interference with the TPS sensor and the air horn. Not really a huge setback but now I need to relocate the alternator. Fortunately this is common and several companies make relocation kits. I went with one from Aussy-land that puts the alternator where the P/S and A/C was. Hopefully it won't interfere with the steering column since it was designed for use on RHD cars. There's also going to be a tight fit between the TPS sensor and water temp sensor leads but that shouldn't be a big deal. I can always move the water temp sensor anyway...

One last mock up shot with the injectors for s****.

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This is going to be a colorful engine bay: blue anodized air horns, purple anodized injector hats, red anodized FPR and fuel filter, black anodized hose ends and fittings and stainless steel line.

Oddly enough the manifold doesn't fit on my old engine that I'm using as a dummy. I'm not sure if the bolt pattern is slightly different or if some of the studs are bent. I'll mess with the studs so it'll fit on the dummy so I can continue laying everything out on the car.

Immediate to-do list (in no particular order):
-Install intake onto dummy enigne and wire injectors and TPS.
-Finish fuel lines.
-Build airbox and install/wire IAT sensor.
-Relocate/wire alternator.
-De-power steering rack.
-Wire starter
-Paint engine parts

Parts needed:
-Exhaust
-Rebuild kit (seals, gaskets, bearings, etc.)
-Clutch/flywheel

-Bunch of misc. engine parts
 
That last pic is giving me the weirdest boner right now... AWESOME! And great progress, man.
 
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