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- First Line
- JP 21 Rally NEW
The JP 21R-7L Stock version is intended to the drivers avid to have performance and quality JP Racing without investing in an expensive engine. The diameter of crankshaft is 14mm. Its sleeve is endowed with 7 transfers and the piston made with an alloy of aluminum-silicon. The sleeve with 7 ports was selected to combine performance and quality without other concessions. The JP 21R-7L Stock is endowed with high-speed main bearing as all the JP Racing engines. This engine is intended for the 1/8 On-Road car.
| C. Capacity : | 3,49 cc |
|---|---|
| Bore : | 16,26 mm |
| Stroke : | 16,80 mm |
| Ports : | 7 |
| Crankshaft : | ø 14 mm |
| Carburettor : | ø 9mm + reducer |
| Glow PLug : | Turbo |
| Main Bearing. : | Hight Speed |
| Weight : | 339 gr |
Item : JP 21 P-7L
Crankcase JP21 P-7L
The JP 21 P-7L Stock version is endowed with a completely comparable crankcase with all other FX Engine 21. This crankcase tested for several years on the series FX Engine is very strong and perfectly machined for an engine of this price. This quality crankcase will insure the JP 21 P-7L Stock a very high level of performance.
WARNING : Place the piston on the top dead center (PMS) before removing the rear cover.
Cylinder Head
The JP 21 P-7L cooling head is endowed with 8 ribs. It's shape and size were studied for an optimal cooling of the engine. The blue colour head is engraved P7 and JP.
Head Insert "TURBO"
The insert is a "Turbo" version to give an optimal performance to the JP 21 P-7L.
WARNING: it is very important to use only a Novarossi Glow Plug for this engine. Only this Glow Plug is perfectly adapted with this insert. The use of other brands can make the engine instable and damage the insert and the piston sleeve.
7 Ports ABC Piston Sleeve
This ABC sleeve 7 ports is selected to obtain an optimal performance. The structure of its ports optimizes performance and the fuel consumption of this engine. The piston is casted with a special alloy of aluminum. It's drilled with 2 holes for a better lubrication of the connecting rod and to decrease the temperature of the top of the piston.
Crankshaft "TURBO"
The crankshaft of the JP 21 R-7L was drawn for a perfect balancing without the addition of balancing masses. The red dough comes to fill the crankshaft's hole for a low weight and improves gas flow. The diameter of the crankshaft's body is 14 mm. The hole inside the shaft is slightly conical for a better flow.
WARNING: Using the shaft for cleaning purpose in solvent or gasoline may cause damage the red dough.
Carburettor 9mm
The carburetor is endowed with an aluminium body to receive exchangeable reducers. This carburettor is delivered with a reducer of 8.5mm green. its also available in different sizes. As on all the engines JP carburetor, the adjustment of the metering needle is made with only one screw for a more constant and easy setting.