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MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG MGA - 4:1 Crown Wheel and Pinions

Having just bought a 4:1 set on ebay, the vendor is offering more at $125, he's in the USA.

If anyone is interested, drop me a mail for his details.

It's a good compromise for dropping rpm at speed but not losing the acceleration that happens when using a 3.9:1 set.
dominic clancy

Dominic

I have 4.3:1 and a Sierra 5-speed box. Would this be an ok modification?

Steve
Steve Gyles

Depends on whether you want to lower the revs a bit or not. and on whether you can lose a little acceleration. The racing guys use this ratio as a best compromise.
dominic clancy

Sorry

Ratio should be 5.125: 1 or 8/41. The real racers set!
dominic clancy

I have the 3.9 with the five speed. It also has the 18v engine. Works great as a freeway flyer and even in the mountain ranges. It may not have as much power to climb in the mountains but still good.
JEFF BECKER

This thread was discussed between 22/06/2005 and 24/06/2005

MG MGA index

This thread is from the archive. The Live MG MGA BBS is active now.