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QBM1M

Quaife In-Line 4-Speed Sequential with Drop Gears

Please confirm your application using the attached technical drawing before purchase.

Technical Spec

Please contact us for availability

Excl. Tax: £3,325.00 Incl. Tax: £3,990.00

**Due to the wide range of possible gear ratio options with this gearbox, please call or email us with your requirements so we can advise you on stock and leadtime.**

Designed as a replacement for the Ford Rocket gearbox used for oval / short circuit racing, QBM1M provides groundbreaking levels of user configurability in a compact, state-of-the-art package which is rated to transmit up to 250bhp.

An open face four dog design, four straight-cut gears and a barrel style shift mechanism offer ultra-fast gearshifts with a choice of gear lever locations, while the lightweight, short design of QBM1M allows rearward positioning of the engine within vehicles that previously used a short tailcase Rocket gearbox.

QBM1M’s drop gear mechanism is secured by circlips and is situated beneath a ‘quick change’ cover, enabling users to easily alter the overall gearing. Six drop ratio choices, plus a huge range of 1st to 4th gear ratios means QBM1M users can fine tune gearing to suit circuits or even weather conditions in a matter of minutes.

Key technical features of the QBM1M four-speed sequential Rocket-style gearbox with drop gears:

• Ultra-fast sequential shift with barrel style change mechanism
• Wide range of base gear ratio sets and six drop gear options
• Quick change drop gears for easy overall gearing changes
• Compact design with choice of gear lever locations

Gear Ratios With Base Drop Gear Set

  1st       2nd       3rd       4th
2.992   2.063   1.966   1.857
2.393   1.702   1.292   1.000
2.190   1.533   1.179   0.963
2.039   1.376   1.125   0.929
1.821                               0.891

Complete Range Available With Drop Gear Sets

1st:    3.31 – 1.600

2nd:   2.28 – 1.210

3rd:    2.17 – 0.990

4th:    2.05 – 0.790

Drop Gear Ratios

Set A:    1.370
Set B:    1.300
Set C:    1.240 (Base Set)
Set D:    1.180
Set E:    1.140
Set F:    1.090

View FileQBM1M Ratio Calculator    Size: (27.16 KB)
Quaife In-Line 4-Speed Sequential with Drop Gears

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