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| HOME | PRODUCTS | FORUM | RESOURCES | KIT COMPARISON | FREQUENTLY ASKED QUESTIONS | |||
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| GALLERY | HISTORY | VO THEORY | SYSTEM | MEDIA | CONTACT | |||
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Vendor |
Frybrid |
Greasecar |
Golden Fuel Systems, formerly Greasel |
Plantdrive* |
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Tank |
5025 Aluminum, baffled, pressure tested, all internal fittings are welded, fuel level sender and billeted access plate attached with cork gasket and machine bolts, vented through fitting, inductive fuel level sender |
Aluminum, fuel sender and access plate attached with machine bolts and threaded inserts, sealed with silicone sealant, vented through cap. |
Aluminum, fuel sender attached with cork gasket, no access plate |
Tank sold separately though included in this comparison; Aluminum, pressure tested, baffled, no internal fittings |
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In-tank heat exchanger |
Aluminum Coil surrounding fuel pickup, coil TIG welded to billeted fuel and coolant manifold and access plate. Fuel reservoir around heat exchanger to improve efficiency and avoid interruption of fuel supply when cornering. Coolant lines connect to heat exchanger with compression fittings outside the tank. |
Copper Coil mounted and connected to coolant with compression fittings inside the tank. |
Coolant channel along length of bottom of tank |
Stainless steel coolant loop, fuel drawn through center of heat exchanger. No fittings in tank. |
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Heated fuel lines |
Aircraft aluminum fuel lines, hose in hose heating |
PEX fuel lines, hose in hose heating |
Regular fuel line, hose on hose heating |
Fuel line not included, kit designed for hose on hose |
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Fuel return |
Return to diesel tank on diesel, return to vegetable oil tank on vegetable oil |
Return to diesel tank on diesel, return to supply line on vegetable oil |
Return to supply line on diesel or vegetable oil |
Return to diesel tank on diesel, return to supply line on vegetable oil |
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Purge cycle |
Supply from diesel tank, return to vegetable tank in vegetable oil return line |
Supply from diesel tank, return to vegetable tank in vegetable oil supply line |
No purge cycle |
No purge cycle |
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Shutdown procedure |
15 seconds of purge cycle. Purge time set with fuel dye and sight glass and programmed into microprocessor. |
1 minute of purge cycle. Time set by looking into vegetable oil tank for returning diesel, thereafter controlled by holding switch for determined time. |
1-2 minute of running on diesel. |
1-2 minutes of running on diesel. |
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Contamination of diesel tank with vegetable oil during shutdown procedure |
No |
No |
No |
Yes |
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System control |
Microprocessor controller switches to vegetable automatically when coolant at appropriate temperature. Push button to start purge cycle. Toggle switch to turn off system and default to diesel. |
Three way toggle switch for diesel, vegetable oil, and purge cycle |
Toggle switch between diesel and vegetable oil |
Toggle switch between diesel and vegetable oil |
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Purge warning |
Warning buzzer |
Buzzer sold separately |
None |
Warning buzzer |
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Heated filter |
Heat exchanger on top of filter |
Copper coil wrapped around filter body |
Electric band heater wrapped around filter body |
Coolant heated, two-stage filter |
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Final heat exchanger |
8500 BTU heat exchanger |
None |
None |
240W, 12V electric heater tube |
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Fuel Valves |
Aluminum body solenoid valves |
Stainless steel body solenoid valves |
Plastic body solenoid valve, manual brass ball valve |
Pollack motor driven valve six port valve with fiberglass reinforced nylon body, manual brass ball valve |
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Indicator lights |
Lights indicate when diesel, vegetable oil, or purge cycle |
Light in switch indicates diesel, vegetable oil, or purge cycle |
None |
None |
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Gauges |
Fuel level gauge |
Fuel level gauge |
Fuel level gauge and vacuum gauge |
Vacuum gauge on filter in engine compartment |
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Available volumes for vegetable oil tank |
21, 15 gallons |
15 gallons |
17; Golden Fuel sells some kits that are designed to use the stock tank for VO, and an auxiliary polyethylene tank for diesel. These auxiliary tanks range from 3 to 12 gallons. |
Tank sold separately, 24 gallons |
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Coolant and fuel hoses and clamps |
Included |
Included |
Included |
None |
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Price of kits |
$1795 with 15 gallon tank $1895 with 21 gallon tank |
15 gal. tank |
$1200 |
$1999, price includes 24 gallon tank sold separately * |
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Notes:
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Differences in design:
The image below shows the inlet and outlet of the coolant hoses on a typical Greasecar tank, as you can see both holes are in the bottom edge of the tank and sealed with rubber gaskets.
The Frybrid system uses a unitized in-tank heat exchanger and tube in hose terminating end mounted to the top surface of the tank. We believe that any holes in the bottom of a tank you want to hold liquid are just a bad idea.
The Frybrid Unitized in-tank exchanger has the fuel inlet and return as well as the tube in hose couplings on top and outside the tank, the coolant connections are TIG welded and pressure checked to 125psi during construction, the inlet and return lines are welded to draw straws which extend to the bottom of the heat exchanger shield where a fuel resovoir is formed preventing fuel starvation when cornering. There are no collant connections inside the tank to leak into the fuel, every connection is TIG weolded, pressure tested and the welds are then coated with an epoxy impervious to fuels.
In this cut-away model you can see the 5/8" ID fluted aluminum coil we have custom made, the spirals not only increase the surface area of the heat exchanger, but introduce mixing of the collant to deliver more heat to the surface. The outer shield protects the coil from the forces of sloshing fuel, centeralizes the heat in the resovoir itself heating the fuel being drawn out of the tank and forms a resovoir.
In this image looking inot a Greasecar tank you can see that the coolant inlet (left) has a compression fitting choking the collant flow down to a single 3/8" OD section of copper water supply line, this line loops about the inside of the tank in several coils and is the systems only heat exchanger. Copper is known to be a rapid accellerant in the process of oxidative polymerization in vegetable oils leading to the formation of long chain polymers (plastic) which clogs filters and attacks steel. These loops of copper attempt to heat all the fuel in the tank to injection temperature. On the right you can see a brass T junction with the collant returning to the line running out of the tank on the far right and coming from the center you can see a section of PEX plastic tube whihc is actually the fuel pickup. It is sealed form the pressurized coolant with a single o-ring inside the conical compression fitting.
The above image shows the "Hatch" cut into the top of Greasecar tanks, it is through this hatch that the user installs the copper coil and compression fittings, once installed the hatch is secured witha cork gasket and 18 self tapping sheet metal screws, these screws can only be installed once without stripping the threads from the tank top. (the Goo on the tank bottom is polymerized vegetable oil)
Here we have a Frybrid in-tank heat exchanger installed in the tank as it is delivered. It is held in place by 8 studs protruding from the tank, washers and nuts and sealed with a buna-cork die cut gasket. The Unit may be removed as often as you like and rotated into 8 positions allowing for easy line routing. Again, notice that all the holes in the tank are on the top of the tank and that there are no coolant connections inside the tank.
Frybrid tanks come with a welded fill spout and a standard DOT diesel screw cap with gasket.
each Frybrid tank is also fitted with an aluminum and pyrex "Sight Glass" allowing the user to see the fuel level while filling the tank to avoid unpleasant spills in the trunk.
These images show a Greasecar filter assembly. Again we see the 3/8" OD Copper water supply line but now it is wrapped around a standard diesel fuel filter to heat the filter. Changing the filter requires that the mount is removed and the filter slid out of the copper coil, the filter is then unscrewed and replaced and the unti reassembled.
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While we have tried to make this chart as accurate as possible, we may have made mistakes. If you see an error, please e-mail info@frybrid.com.