All out 232 gy6 Taidia build
Sept 8, 2019 11:48:29 GMT -5
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Post by 3strokeengine on Sept 8, 2019 11:48:29 GMT -5
Im sure everyone at some point has thought about doing 232 GY6 but price is usally prohibitive. Well i had an idea instead of buying a 2500$ 232 cc crate motor from Taida i could save some money and build one reusing things like fasteners, bushings, and transmission components from my 170cc gy6.
Well it turns out you dont really save any money building it like this but it was a fun build to build it from a bare case on up.
I decided to go with an air cooled 2 valve motor. The 4 valve engine is another 500$ and i really dont think its worth it for the small gains it has over a 2 valve motor.
I was thinking about liquid cooled but i dont really have room for a huge radiator on this bike, which i should mention is about the same size and weight as a 139qmb 50cc scooter but with factory a 150cc gy6 engine.
Here are all the technical specs of the motor. I also went as far to degree the T300 camshaft and get some real cam numbers from it (all durration and overlap degrees are measured at valve lift greater than 0.050" inches vs advertised duration which is measured at 0.006" inches lift
Bore: 67mm
Stroke: 66mm
Camshaft: Taida T300
Combustion chamber volume: 18cc
In/Exh valve dia: 30.5mm / 26.5mm
Piston dome volume: 1.5cc
Deck clearance: 0.015"
Head gasket thickness: 0.010"
Compression ratio: 13.4 : 1
T300 camshaft spec:
Intake lift: 0.314" 7.98mm
Exhaust lift: 0.254" 6.45mm
Intake duration @0.050: 229*
Exhaust duration @ 0.050: 215*
Intake centerline: 96* ATDC
Exhaust centerline: 94* BTDC
Lobe seperation angle: 95*
Intake open @0.050": 7* BTDC
Intake close @0.050": 42* ABDC
Exhaust open @0.050": 30* BBDC
Exhaust close @0.050": 5* ATDC
Overlap @0.050": 12*
Transmisson: Stock variator with 10 gram slider weights 842 powerlink belt. Stock rear pulley with stock contra spring. Dr Pulley Hit clutch, blue clutch springs, red pillow springs 6000 RPM Stall. 15 × 37 (2.47) Final drive ratio
Fuel: 112 octane C12 leaded race gas
Intake: 30mm CVK flatslide 125 main / 38 pilot jets, stock vacuum spring/hole dia, needle clip in 2nd from richest position
Exhaust: Single step 1-1/8" ID header pipe stepping up to a 16 inch long 2 inch ID straight pipe, No muffler.
Oil cooler is sourced from a Toyota supra power steering pump cooler plumbed with
AN-6 fittings and braided AN line
Electrical: DC CDI box running approx 3-4 degress advanced timming via slotted pickup trigger. 11 pole stator with 3 phase regulator (AC magneto coil not used).
4 Brush high torque starter
Pictures of the build of course.
m.imgur.com/a/ZmVcu7U
Performance wise, i havent been to the drag strip but ive measured 0-60 times under 10 seconds (im an 180 lbs rider) with the right atmospheric conditons. Top speed is GPS verified at 78 MPH @ 10,500 RPM due to the shorter gearing for drag racing.
So far other than frying out starter which was due to too low of a gauge starter wire reliability has been great. It has around 3000kms on it by now and ive been on rides that are about 50-60 miles round trip on one tank of gas, typically cruising around 55-60 mph @ around 7000-8000 RPM. Only foreseeable issue with long distance driving is finding 108 octane racegas. 93 octane wont cut it with 13.4:1 compression ratio in an aircooled motor.
Well it turns out you dont really save any money building it like this but it was a fun build to build it from a bare case on up.
I decided to go with an air cooled 2 valve motor. The 4 valve engine is another 500$ and i really dont think its worth it for the small gains it has over a 2 valve motor.
I was thinking about liquid cooled but i dont really have room for a huge radiator on this bike, which i should mention is about the same size and weight as a 139qmb 50cc scooter but with factory a 150cc gy6 engine.
Here are all the technical specs of the motor. I also went as far to degree the T300 camshaft and get some real cam numbers from it (all durration and overlap degrees are measured at valve lift greater than 0.050" inches vs advertised duration which is measured at 0.006" inches lift
Bore: 67mm
Stroke: 66mm
Camshaft: Taida T300
Combustion chamber volume: 18cc
In/Exh valve dia: 30.5mm / 26.5mm
Piston dome volume: 1.5cc
Deck clearance: 0.015"
Head gasket thickness: 0.010"
Compression ratio: 13.4 : 1
T300 camshaft spec:
Intake lift: 0.314" 7.98mm
Exhaust lift: 0.254" 6.45mm
Intake duration @0.050: 229*
Exhaust duration @ 0.050: 215*
Intake centerline: 96* ATDC
Exhaust centerline: 94* BTDC
Lobe seperation angle: 95*
Intake open @0.050": 7* BTDC
Intake close @0.050": 42* ABDC
Exhaust open @0.050": 30* BBDC
Exhaust close @0.050": 5* ATDC
Overlap @0.050": 12*
Transmisson: Stock variator with 10 gram slider weights 842 powerlink belt. Stock rear pulley with stock contra spring. Dr Pulley Hit clutch, blue clutch springs, red pillow springs 6000 RPM Stall. 15 × 37 (2.47) Final drive ratio
Fuel: 112 octane C12 leaded race gas
Intake: 30mm CVK flatslide 125 main / 38 pilot jets, stock vacuum spring/hole dia, needle clip in 2nd from richest position
Exhaust: Single step 1-1/8" ID header pipe stepping up to a 16 inch long 2 inch ID straight pipe, No muffler.
Oil cooler is sourced from a Toyota supra power steering pump cooler plumbed with
AN-6 fittings and braided AN line
Electrical: DC CDI box running approx 3-4 degress advanced timming via slotted pickup trigger. 11 pole stator with 3 phase regulator (AC magneto coil not used).
4 Brush high torque starter
Pictures of the build of course.
m.imgur.com/a/ZmVcu7U
Performance wise, i havent been to the drag strip but ive measured 0-60 times under 10 seconds (im an 180 lbs rider) with the right atmospheric conditons. Top speed is GPS verified at 78 MPH @ 10,500 RPM due to the shorter gearing for drag racing.
So far other than frying out starter which was due to too low of a gauge starter wire reliability has been great. It has around 3000kms on it by now and ive been on rides that are about 50-60 miles round trip on one tank of gas, typically cruising around 55-60 mph @ around 7000-8000 RPM. Only foreseeable issue with long distance driving is finding 108 octane racegas. 93 octane wont cut it with 13.4:1 compression ratio in an aircooled motor.
