Krochus’s turbo 2165 Baja Bug sequential EFI swap

[gprudenciop]

100 micron is the norm for a pre filter. If you could make a filter from a walbro work, that would be ok.
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Never look down at anybody unless you are helping them up..
Loaning someone your strength instead of reminding them of their weakness = kindness..

[buguy]

Clone I have that same bender (the first one). Did you have and trouble with it getting kind of flat on the bend? I'm about to bend some 3/8 line for my carb and it seems like I remember the one time I used it (3-4 years ago) it sort of flattened where it wrapped around the Bender. Maybe it was because I'm using the bigger line?

[clonebug]

[clonebug]

[Krochus]

Sometimes a little paranoia is a good thing.

I decided to take the advice above and made and welded a bung onto my fuel tank so my return is separate from my fuel intake. I don’t pretend to be a master tig welder but I can accomplish what needs to be done even if it’s not pretty. My previous 20 year career was as a professional welder but tig welding was never a process I used. Surprisingly I didn’t burn through the tank even once.

The tank is pretty rusty inside. Prior and post welding I throughly steam cleaned and pressure washed the crap out of it. It’s going to soak in white vinegar for a few days then get a treatment of Red Kote to seal everything for the next half a century

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1970 Turbo Baja Bug Turbaja 2165 t3/t4 Speeduino sequential EFI LS3 coil on plug ignition

1965 Chevy c30, Microsquirt turbo aluminum 5.3/nv4500

[gprudenciop]

That should work nicely.does the ecu you are going to run have pwm fuel pump control?if so you could add a pwm controller from a subaru like I did. It works at 33%,66% and 100% pulse width. it does wonders on heatsoaked fuel system.super simple to hook up and price is cheap..
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Never look down at anybody unless you are helping them up..
Loaning someone your strength instead of reminding them of their weakness = kindness..

[Krochus]

[gprudenciop]

Well what I have found if you run your car for extended amount of time the fuel cycles alot with a big fuel pump and the fuel rails heat the fuel pretty bad.what I do is run my fuel pump at idle and cruz at 33% pulse width making it cycle less fuel.when I hit higher revs/boost I up the pulse to 66% than 100% depending on rev/boost.this keeps fuel cooler and wear and tear on the pump down. You can find them cheaper this just for example.....
https://www.ebay.com/itm/2004-SUBARU-IMPREZA-WRX-S...SwrwJbnFRH
And wiring....

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Never look down at anybody unless you are helping them up..
Loaning someone your strength instead of reminding them of their weakness = kindness..

[Krochus]

I’m definitely curious enough and am going to take some thermal images of the pump and return to see what is going on

With this system the fuel going to the rails will only exit through the injectors. But by the same token the fuel doesn’t have 20’ of hose to cycle through dissipating heat along the way. The total distance on the return loop will be about 6’. This is why I opted away from the TEE on the bottom of the tank because the volume of fuel recirculating would be very small
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1970 Turbo Baja Bug Turbaja 2165 t3/t4 Speeduino sequential EFI LS3 coil on plug ignition

1965 Chevy c30, Microsquirt turbo aluminum 5.3/nv4500

[gprudenciop]

Oh ok! That should work pretty good than.I miss understood you. So it's exactly like a returnless system but different!!
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Never look down at anybody unless you are helping them up..
Loaning someone your strength instead of reminding them of their weakness = kindness..

[Krochus]

[buguy]

That's a pretty neat idea. I had never heard of cutting the cycling down on idle and cruise, but it makes perfect sense to me.

[Krochus]

[gprudenciop]

[Krochus]

[66brm]

[Krochus]

Lots of progress today.

Virtually all the wiring is done as is the fuel system. I will freely admit I have made a cardinal sin and ran the fuel line through the car. I just didn’t have any other options I liked that kept it well protected. But everything is secured and well routed. The line actually exits passenger compartment where the original battery cable did. The battery is now in the cargo area along with the speeduino. Getting a few things to the front of the car like tach signal, heater switch and the wideband wiring was made really easy with a 9 conductor “cord” I got from a local audio shop.



The tank has been lined with red kote as it was pretty rusty and trashy inside. You can see the tee on the bottom of the tank (one side is blocked) this was accomplished by simply tapping the stock tank outlet for 1/4 npt.

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1970 Turbo Baja Bug Turbaja 2165 t3/t4 Speeduino sequential EFI LS3 coil on plug ignition

1965 Chevy c30, Microsquirt turbo aluminum 5.3/nv4500

[madmike]

Great Job Kroc, Luv the cup holder and the fact u removed your shoes before gettin in the bug(same here)
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'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works"

[rodeking]

Nice work. On the fuel return to the tank I have made setups to go into the filler plumbing to avoid having to weld a separate fitting on the tank, not sure if that could be done on these?

[Krochus]

I’ve powered up and have pressurized the fuel system. Thus far no leaks fingers crossed.

I am having a peculiar issue I had before when I tried to use a relay in conjunction with the master power to my Megajolt. The key switch will not shut off the ignition power anymore.

It almost has to be something specific to my car.
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1970 Turbo Baja Bug Turbaja 2165 t3/t4 Speeduino sequential EFI LS3 coil on plug ignition

1965 Chevy c30, Microsquirt turbo aluminum 5.3/nv4500