Drone engineering

Small engine fuel injection conversion, carburetor to EFI

The following table shows a list of engines from popular RC manufacturers that can be converted to EFI engine systems to use as power plants for UAVs.

Löweheiser throttle bodies have the bolt pattern of Walbro carburetors, and therefore installation on an engine that originally came with Walbro carburetors is straightforward without requiring any engine modifications.

ZENOAH engine Original carb. Bolt pattern. Venturi diam. Löweheiser Throttle body
G230RC Walbro WT-603B 31mm 12.7mm TB -14mm
G240RC Walbro WT-813A 31mm 12.7mm TB -14mm
G260RC Walbro WT-603B 31mm 12.7mm TB -14mm
G260PU Walbro WT-813A 31mm 12.7mm TB -14mm
G260PUH Walbro WT-643 31mm 12.7mm TB -14mm
G270RC Walbro WT-813A 31mm 12.7mm TB -14mm
G290RC Walbro WT-990 31mm 12.7mm TB -14mm
G320RC Walbro WT-1107 31mm 13.49mm TB -14mm
G380PU Walbro WT-338 31mm 13.49mm TB -14mm
G450PU Walbro HDA48D 31mm 15.80mm TB -16mm
G620PU Walbro HDA48D 31mm 15.80mm TB -16mm
G800BPU Walbro WJ-64 31mm 17,46mm TB -18mm
Desert Aricraft (DA) engine Original carb. Bolt pattern. Venturi diam. Lö Throttle body
DA-35 Walbro WT1115 31mm 12,7mm TB -14mm
DA-50 Walbro WT-201B 31mm 13,49mm TB -14mm
DA-60 Walbro (unknown) 31mm TB -16mm
DA-70 Walbro HDA48B 31mm 15,08mm TB -16mm
DA-85 Walbro HDA77B 31mm 15,88mm TB -16mm
DA-100L Walbro WJ-71-1 31mm 18.25mm TB -20mm
DA100I (Inline) (unknown) 31mm TB -20mm
DA-120 Walbro WJ71 31mm 18.25mm TB -20mm
DA150L Walbro WB25 46mm TB -25mm
DA-170 Walbro Wb-27-1 46mm TB -25mm
DA-200 Walbro WB-32-1 46mm 23.83mm TB -25mm
3W engine Original carb. Bolt pattern Venturi diam. Lö Throttle body
3W-28i Tillotson He12a TB -14mm
3W-55i Tillotson HS 25 TB -16mm
3W-55iUS (unknown) TB -16mm
3W-55XI (unknown) TB -16mm
3W-56iB2 (unknown) TB -16mm
3W-75iUS (unknown) TB -16mm
3W-75iUS-TS (unknown) TB -16mm
3W-80xi Tillotson HS 25 TB -16mm
3W-85xi Tillotson HS 232 TB -16mm
3W-106iB2 (unknown) TB -20mm
3W-110iB2 Tillotson HS 232 S2 TB -20mm
3W-110iR2 Tillotson HS 25 TB -20mm
3W-112iB4 Walbro HDA 6A TB -20mm
3W-150iB2F Tillotson MO3 TB -20mm
3W-157xiB2F Tillotson HR 14 A MP4
Walbro WGA 7 PSF
TB -20mm
3W-157xiB2F-TS (unknown) TB -25mm
3W-170xiB2F Tillotson HR 14 A MP4
Walbro WGA 7 PSF
TB -25mm
3W-210xiB2F-TS Walbro WGA 7 PSF TB -25mm
3W-220iB4 Tillotson HS 232 S2 TB -25mm
3W-275xiB-TS2 Tillotson HR 194 A TB -25mm
3W-342iB2 Tillotson HR 194 A
3W-342iB2-TS (unknown)
3W-684iB4 Tillotson HR 194 A
3W-684iB4-TS (unknown)
DLE engine Original carb. Bolt pattern Venturi diam. Lö Throttle body
DLE 20 Walbro WT603 31mm 9.53mm TB -10mm
DLE 30 Custom DLE carb. 31mm TB -14mm
DLE 35 Custom DLE carb. 31mm TB -14mm
DLE 40 Custom DLE carb. 31mm TB -14mm
DLE 55 Custom DLE carb. 31mm TB -16mm
DLE 60 Custom DLE carb. 31mm TB -16mm
DLE 61 Custom DLE carb. 31mm TB -16mm
DLE 85 Custom DLE carb. 31mm TB -16mm
DLE111 Walbro WJ-71-1 31mm 18.25mm TB -20mm
DLE 120 Custom DLE carb. 31mm TB -20mm
DLE 170 Custom DLE carb. 46mm TB -25mm
DLE 222 Custom DLE carb. 46mm TB -25mm
ZDZ engine Original carb. Bolt pattern Venturi diam. Lö Throttle body
ZDZ 56RV-J (unknown) 31mm TB -16mm
ZDZ 80 RV-J Walbro WJ-71-1 31mm 18.25mm TB -16mm
ZDZ 97RV-JCH (unknown) 31mm TB -16mm
ZDZ 195B2RV-J Champion (unknown) 31mm TB -25mm
ZDZ 140B2RV-G Champion (unknown) 31mm TB -20mm
ZDZ 112B2RV-J Champion (unknown) 31mm TB -20mm
ZDZ 250B2-J (unknown) 46mm TB -25mm
ZDZ 250B2RV-J (unknown) 46mm TB -25mm
ZDZ 112R2-J INLINE (unknown) 31mm TB -20mm
ZDZ 210R2-JS iNLINE (unknown) 46mm TB -25mm
ZDZ 250R2-JS INLINE (unknown) 46mm TB -25mm
ZDZ 210B2-J (unknown) 46mm TB -25mm
ZDZ 210B2RV-J (unknown) 46mm TB -25mm
ZDZ 210B2RV-JS (unknown) 46mm TB -25mm
ZDZ 250B2-J PPG (unknown) 46mm TB -25mm
ZDZ 224B4-J (unknown) 46mm TB -25mm
ZDZ 360B4-J (unknown)
ZDZ 420B4-J (unknown)
ZDZ 420B4-JS (unknown)
ZDZ 420B4-JSR (unknown)
ZDZ 500B4-J (unknown)
ZDZ 420R4-JSR inline (unknown)

1 thought on “Small engine fuel injection conversion, carburetor to EFI”

  1. Dear Sirs,
    we are interested in an EFI system for an UAV engine (DLE 60)
    Can you supply the complete EFI kit (throttle body, wiring, sensors, pump, etc.).
    Can you possibly send us an offer and technical documentation?

    Best regards

    Gaetano Caputo

    G.G.G. S.p.A.
    Stradale Primosole, 46 – Zona Industriale
    95121 Catania (CT) – Italia
    tel. +39 095-591019
    fax: +39 095-592501
    email: ggg@gggele.it
    web: http://www.gggele.it
    pec: ggg_elettromeccanica@pec.gggele.it

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