Lambretta resonance exhaust and Big Box prototype test
A Lambretta exhaust test: the new and upcoming Lambretta Big Box is currently in production. A delivery date is unfortunately still unknown.
The Lambretta exhaust systems in the test
Before we sent the final sample to Spain, the new box was put through its paces again. Lambretta exhaust test: Another prototype box from our friend Chalky from Replay Scooters and JPP came directly to the test bench:
- bgm PRO BigBox Proto
- JPP box prototype
The following resonance racing exhaust systems competed against the pits:
- the TSR Evo,
- the JL3 and
- in MB3
And all three Reso systems did better against the speakers than we would have expected!
The Lambretta engine
The test engine was constructed as follows:
- Cylinder: Converted to membrane RT225 cylinder (BGM2225NR)
- Crankshaft: bgm PRO 110/60 (BGM11060N)
- Ignition: bgm PRO electronic AC ignition (BGM210900KT)
- Carburetor: Dellorto PHBH 30
- Intake manifold: MBD with 6-valve membrane (7672617KT)
- Clutch: bgm PRO 6-disc clutch (BGM8011NR46)
Result & conclusion of the test
Nice and clear to see how good the box is from the start Performancebut also with plenty of torque scores in comparison to the 'racing exhaust systems'.
This is exactly what makes the bgm PRO boxes so nice to drive. There is always enough power available without having to struggle with gear connection problems or having to turn the gas like crazy to get things going.
The moderate consumption values of the engine concepts with the bgm boxes are another advantage, apart from the original look and the pleasant background noise. Another outstanding feature is the protected fastening system with adjustment options in both horizontal and vertical directions. This allows tolerances and, above all, spacers used to be compensated for different strokes and connecting rod lengths.
Lambretta exhaust test performance charts
Here you can find the performance diagrams as PDF:
- Lambretta Exhaust Exhaust Test Dyno Sheet Resos MB3_JL3_TSREvo
- Lambretta Exhaust Exhaust Test Dyno Sheet Box Protos