CTR-STR1057 GROUP A TURBO HEADGASKET FOR RACING, BLOCK NEEDS MODIFICATION

This gasket was originally developed by Howley Racing way back in the mid eighties for what was then part of the factory Rover Group racing effort - the Group A Metro Turbo. C-STR1057 Group A Turbo head gasket The engines developed by Howley Racing were giving 220+bhp and 185lb ft running 16.4psi boost - quite a chunk of power in a car little bigger than a Mini! Despite 10" wide sticky slicks, the engine chirped the tyres in each upward gear change. Even more impressive when you consider this was still on it's single 1.75" HIF SU carb! All that was basically done was to take a standard production head gasket (the then all over silver TAM1521 - a great gasket it it's own right) and add a reinforced fire ring by over-lapping the existing one with an extra fold of metal.As a consequence the block needs to be machined to accept this gasket - rendering it useless for any other gasket fitment and any further over-bores (even to 73.5mm) unless a top-hat type liner was used.

Cylinder head - Torque-down and head gasket problems

This is to help those floundering in an unknown sea of techno-babble and 'magical' cures… Part No Applications: C-AHT288, CAM150, CAM151, TAM1617, CAM4545, 51K1193, TAM1521, GEG300, C-AHT188, C-STR1057, A regular visitor to the message board, and something I am asked frequently about in my other incarnations for other technical media. Generally when something has gone badly wrong! Many folks have just as many ways of dealing with the following subjects - all can and will claim their way has worked for them for the proverbial millennia - so a few words as a basic reference and guide as I see them; we all know there are always exceptions to the rules. This is to help those floundering in an unknown sea of techno-babble and 'magical' cures…

ARDEN 8 PORT ALLOY HEAD

Still produced from the original tooling purchased in 1990 from Jim Whitehouse these Arden alloy 8 port heads were never a straight bolt on conversion. Designed with racing in mind it was developed in 1966/7 to take full advantage of the change to Group 2 racing regulations which allowed more freedom in cylinder head design.