Morris Minor Owners Club

Is it worth getting duplex timing gears? What are the advantages? Are there any cons? Really, the simple question is: should I get duplex or single?

i asked the same question recently, and am still not sure!

I'm rebuilding the engine, and the timing gears have to go anyway, the main sprocket was a mini one fitted without necessary bracer or something- so I just wondered whether it was a good idea to get duplex!

Have a look here Hope that helps!

http://www.mmoc.org.uk/index.php?name=P ... ght=duplex

Thank you, that's very helpful... All right, off I go to rebuild the old crate!

a tip from one who has just been there:

take the front plate off and use a pillar drill, when you countersink your two holes. It's very hard to get the drill dead on 90 degrees to the plate otherwise.

Thanks... I'll remember that. Very helpful. I think we have a pillar drill boxed up somewhere- I'll try and find it!

It's certainly safer to do it that way - no chance of swarf getting in the engine - but it CAN be done on the engine - in the car if necessary! Duplex is really only required if using a high lift/long perid cam with stronger valve springs - otherwise it's a bit of a waste of money! But if you need new gears anyway - the duplex set-up doesn't cost much more. No real need for fancy 'adjustable' timing gears unless for competition use.

The block is currently out of the car and stripped of all removable parts pending replacement of most of said parts, so access shouldn't be a problem... I might as well go for it!

Good time to fit a better camshaft!

Should I? With a new cam, how much else will need to be different? Pushrods? Will there be an increase in performance, decrease in economy, notable change of any other sort? Lots of questions, I know, but I want to consider these things seriously so my Moggy runs sweetly when reassembled...

MG Metro cam is a perfect choice - specially designed by MG/Rover to increase the power yet still be docile in traffic with good mpg. Pushrods remain same - will need a later type oil pump - but these are far better pumps anyway!