Cutting gas tank, doing side exhaust, adding rear diffuser.

synolimit

wooohooo. feeling pumped!! stopped by the shop today to see the gas tank. it'll be done tomorrow and my guy took my suggestion for the drivers fuel level sensor. we cut the top off the white lid thing and on the inside he welded a bracket from the top. two nuts and bolts will hold the left over white plastic part to the bracket. we checked clearance and the level sensor will be able to work 100% so my gauge will work. the only difference will be my dots will literally go down at double the speed haha. The wires will come out of the tank with proper gas tank exiting things (still gotta see it) and ill paint tomorrow after I bring it home and get some pics for you guys. Only thing left to do is test to see if the gas cap will vent and vacuum properly. If it doesn’t I think ill Tee the 1/8” line we left that goes to the top of the tanks fill line and just vent to atmos. stay tuned.

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13 370z-

synolimit

Damn, we left the new shop to go get the tank at the old shop and he forgot the pressure test. So i left it for one more day and phone was dead. Delayed one more day...

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13 370z-

synolimit

ok finally got the tank back. starting painting tomorrow as i got home late. plan is rustoleum rubber undercoat paint. heres some pics...

ok first pic shows where we mounted the drivers side level sensor. as you can see it floats up opposite of the main fuel pump sensor so they wont hit each other.



next two pics is the bracket i talked him into making. the drivers level sensor was cut off and two nuts and bolts were used to hold it to the bracket welded to the top of the tank.





inside tank.



outside tank



and last the connector that lets you bring wires out of the tank and clamps it all together for a seal.

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13 370z-

phunk

that should do the trick!

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synolimit

Also no room in the tank to get my hands in there so i put the quick connect hose back on the cross over thing off the tank and just cut it so it could reach the very bottom of the tank.

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13 370z-

phunk

before you paint it with the undercoat, make sure its one that fully hardens. I have painted stuff with it before hoping to get a semi textured and soft coating just to find that some brands of it stay slimy for eternity, they dont "cure" or dry. I would possibly consider a light truck bed spray just to be positive it cures

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Rusty

You should rethink your electrical connectors inside the tank. You want your connectors outside the tank, not inside. You want solid wire inside the tank. If you have to make a connection inside. Solder it and heat shrink it. You don't want to be like TWA flight 800.

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浪人 - 殺し屋
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synolimit

The wires with the connectors inside are there because thats where the oem wires ended after being cut off from the old white top. I didnt look but i dont think cutting them off the old sensor and trying to add new ones will work without finding new pin connectors and stuff. Leaving them attached like oem is best. Regardless of how it is in there it has to have a connector in there because if its a solid connection i wont be able to pull the pump ever as the two sensors are using the same top and outlet. Everytime i go in id have to cut them in half making the wires shorter and shorter. Solid could of worked if the wires came out the top of the tank vs the white pump housing top but we didnt do it that way.

PS as for solidering...per my builder who has done WRC built cars...solidering is a 100% no no!! Solidering weakens the wires just outside the solider. So vibration can have them weaken and break just like a weld on metal outside the bead. In all racing they dont do this. They use solid tub style connectors and just crimp them together and heat shrink.

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13 370z-

Rusty

Someone doesn't know how to solder and how to weld if someone is telling you that.

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浪人 - 殺し屋
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synolimit

You think welding is as strong at the metal, the heat zone, the weld, back to the heat zone and then the metal again??? Its not. The heat zone will always be weak unless you heat treat it like dunking it in oil right away after youre done. I also dont see any solider on oem parts...its all one wire from connector to connector or clamped like i said.

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13 370z-

Rusty

I knew I should have kept my mouth shut. Just trying to point a few things out to help you out.

You're not telling me anything new about welding. Having a degree in welding engineering and welding for over 25 yrs on materials that you never heard of, and of technics . Working on my masters in mechanical engineering. You should do some research on stress relieving before posting. Your oil quenching is not stress relieving. It's heat treating. Totally different. If you dunk you weld right after you are done welding. It will make the weld and heat affected zone HARD and brittle. D'uh! What you want to do is a preheat of the welding area before welding, weld, then do a post teatment. This all depends on the material. Some materials require that you keep the part below 70F the whole time. To do this, you have to use chill blocks. Some, all you have to do is pass a torch over the part until you see moisture forming. Then dry it with the torch. Others require a preheat of over 700f or higher before welding. With an interpass temp within 50 degrees (650 to 750) of your preheat temp. Once welding has stopped. Some materials require only a slow cool to room temp. So you wrap the piece in Kaowool insulation and let it cool. Others require going straight into stress relieving. The process normally goes like this. Start at a temp, say 500f. Hold for an hr. Then ramp up a 100 degrees ever hr until you hit your final temp. Depends on the material. Say 1100F. Hold there for a set time. Then ramp down a 100 degrees ever hr until 400F is hit. Other stress relieving methods include peening, and vibration.

You're right on a new car about soldering wires. Because the manufacturer's don't have to do it. It's when you start to modify and add things to the system. Oh, there is a BUNCH of solder in a new car. Every circuit board in the car has soldered joints.

Have fun with your project.

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浪人 - 殺し屋
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synolimit

But like you said i bet you're taking about metals ive never heard of. Here its mild steel or copper wires. So if teams have found vibrations kill their connection points we have to do whats best as seen by failure. I agree with you on everything else but if teams are paying hundreds of thousands for rally cars and they've seen wire failure except with using crimps and clamps you pretty much have to go with what works. As for welding like my cage for example if cages have just been TIG a certain way and its worked for X amount of years then ill let him just TIG my FIA cage up and call it a day. Ive seen the welds and cages. Im confident it'll save my life as he does it. All other metals and stuff i'll most certainly find someone like you with an advanced degree to consult with for sure!

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13 370z-

BuckeyeZ

You forgot the "BOOM".......mike drop......

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Stillen | EVO-R | HPS | K&N | Hotchkis | Modshack Oil Cooler | SPL

Rusty

With mild steel, you could do a little preheat of the weld area with a torch. Just heat the metal up enough to form moisture on the surface. This chases the the hydrogen away so you don't get hydrogen corrosion cracking in the weld. Most people don't know about that little trick.

As for the wiring. If I'm building a race car. I would want to try much as possible to have my wiring with few as possible connections of any kind. That's clamps, crimps, weatherpacks, milspec connectors and soldered joints. The more connections you have, the more places that problems will bite you. I've seen all of the fore mention connections fail. As you said that if a team is paying hundred of thousands for their race cars. You can bet that they have custom made wiring harnesses.

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浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
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Kingbaby

Nice thread info in and out

I'm contemplating following suit !

Have you installed it yet ?

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