Exhaust test Lambretta bgm PRO Clubman on TS1 – Part 2

Today we continued our bgm MRB Big Box exhaust test. to continue the testing we have fitted a MRB tuned TS1. This TS1 has undergone the RaceTour tune from Mark Broadhurst. The engine remained the same and is the one fitted to red GP 150.
The MRB tuned cylinder kit comes with the MB forged piston, Tassinari V-Force reeds and a head machined by Mark for ultimate reliability. The Mikuni TMX30 was still used.

TS1 cylinder kit versus MRB tuned TS1 to RaceTour specs, both using the bgm PRO MRB Big Box Clubman:

bgm PRO MRB Big Box Clubman versus the Sito Ancillotti:

bgm PRO Clubman versus JL3/Road expansion chamber:

With the JL3/Road being a much favoured exhaust (for what ever reasons) we tested our Big Box Clubman against it too. When looking at the dyno sheets, you shouldn’t be to focused on the peak power alone. Even if peak is 3 hp more, you should compare the width of the power band instead. Or at least as well. If you compare the delivery of power from around 4.600 – 9500 rpm the power delivery is only slightly better, but the more power low down should make the Big Box engine the easier and faster to ride one. Mainly because you easily stay into the power band and don’t have to change gears all the time.
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Upshot: The bgm PRO MRB Big Box Clubman works on all setups. From original to proper tuned TS1 engines. Watch this space for more dyno work coming!