Engine - 998 tuning, further options

Terminology:
MSC/MM - Mini Spares Centre/Mini Mania
BBU - Big Bore Unit (refers to all 1275cc-based units)
SBU - Small Bore Unit (refers to all sub-1275cc units, here the 998)
BHP - Brake Horse Power
CR - Compression Ratio

To improve engine out-put, you need to increase the engine's 'breathing' ability. The stage one kit deals with all the easily bolted-on external parts, and represents the best increase for investment. From here on in the power increases will cost commensurately more money. Power production of any engine, once the 'breathing apparatus' (induction/exhaust system) has been dealt with to cause no restriction ...

C-STN20 SPI PERFORMANCE KIT and C-STN20BUDGET KITSINGLE POINT 1992-1996

This kit has been specifically designed to work with the factory fitted existing single point engine management system. No modifications are necessary

Please beware that if prolonged speeds of 100mph are envisaged the engine may run lean and could eventually lead to engine failure. Power output figures of around 80bhp are normally expected after fitment but is dependant on the original engine build (rolling road tests have consistently shown 20-25% increases).

Figures confirmed by Swiftune Racing. Extra BHP can be obtained with professional air box modification. Further power increases would necessitate modifications to inlet manifold and use of a tubular steel LCB exhaust manifold. These performance figures apply equally to both kits and the only difference is the material of the valves and the different type of 1.5 rockers used. The budget kit uses forged rockers and includes 4 extra washers to shim correct alignment over the valve stems. Fit 2 of AEG168 washers b...