MG Enthusiast – July 2019

http://www.mgenthusiast.com MGEAUGUST 2019

Tuning Guide

61

Sample prices: components

Crankshaft ..........................£2000

Arrow rods set (set of 4) .......£890

Omega diecast

pistons (set of 4) ....................£340

Main cap set ..........................£260

Head, 5-port ..................from £950

Camshaft kit ..................from £185

Alloy timing plate ....................£45

Alloy duplex timing gears .....£135

Pulley ..............................from £65

..............(management pulley £95)

Rockers .........................from £250

.........................(LD pictured £320)

All prices include UK VAT

available for many vehicles and

the A-series engine has one of

the greatest ranges of upgraded

components to choose from. There

are also opportunities to significantly

increase the capacity of the engine.

‘There is no substitute for CCs’ -

was a very popular saying in tuning

circles back in the 1960s and 70s.

For classic engines it is still very true

today. Big capacity A-series engines

are, of course, not new. Over 40 years

ago many people tried to optimise

A-series engines by overboring

ABOVE: In addition to the larger webs

another design variation is the extra-

long keyway. This provides more

positive crankshaft pulley location.

ABOVE: This is the crank nose for an
inline A-series engine suitable for MG
Midgets and Austin Healey Sprites. ABOVE: This is the transverse-engine crank nose suitable for the MG Metro.

These big end journals are

standard 1275 Spridget/Cooper S

size. For MG Metro engines with

the larger 1.75” diameter big end

journals Cooper S, or Spridget

rods, or the Arrow rods, all

1.625”, will be required.