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Classic Mini 1380 Engine & Transmission Powerunit- Complete

Classic Mini 1380 Engine & Transmission Powerunit- Complete

Classic Mini 1380 Engine & Transmission Powerunit- Complete
Your Price $7595.00
This is Special Order Only Item
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1380cc Mini Mania Powerunit - Engine & Gearbox - Mini Cooper
$8895.00 1380cc Mini Mania Powerunit - Engine & Gearbox - Mini Cooper
Big-Bore Power Units from MINI MANIA for the Classic Mini Cooper & Mini Cooper S

The "Ultimate Street Performance Engine" from Mini Mania is the result of 40+ years of building and racing our own Mini Coopers. Because drivability and reliability are of utmost importance in any Mini Cooper, only components from well-established suppliers are utilized to build our Mini motors. While the standard configuration is described here, power-units can be customized to meet your particular needs for your Mini Cooper. Just ask your friendly Mini Mania Sales Technician for a custom power-unit quote.

Engine blocks are cleaned, magnafluxed, bored and painted. The oil passages are thoroughly cleaned, removing and re-tapping all the factory "lead" plugs, and replacing with threaded hex plugs. The cylinder head is one of our special Aluminum heads, which is not only cast ported, but has hardened valve seats for use with unleaded fuels. It has ample room to modify for very large valves. The casting has the valves further appart than any stock casting, making it ideal for big-bore applications. We use squeeze cast Powermax 73.5mm pistons, which are specifically designed for this application. Elgin supplies the custom ground camshaft, which is driven by a new timing chain and gears. Elgin Cams supplies the custom ground camshaft.

We sell these engines ready to bolt in and run, which means, of course, that they are already mated with transmissions. These late model rod change transmissions are also fully rebuilt with a 3.44 final drive (upgrade kits to install these in earlier model cars are available at a small added cost) or a remote shift box can be used (extra cost). Flywheel and clutch assemblies are all in place.

Horsepower testing has been done with the following options not incluced with this powerunit.
Carburation is not supplied but the single 1 3/4" SU HIF type carb (BDK needle) with K&N air filter on an aluminum manifold is recommended as is Long Center Branch (LCB) exhaust manifold. You also provide you our own electrical bits (starter, generator or alternator), cooling system, tailpipe, and Mini! The distributor is not included with the basic "Powerunit" but we recommend the "Aldon" Yellow or a 123.
Note: No core charge and call us if you are interested in 'trading-in' you old engine!

Non-refundable $1,000 deposit required at time of order!


  • 73.5mm squeeze-cast pistons
    10:1 Compression
    A+ Block, Crank, and Rods for best big bore reliability
    Our CAM103 set at 108º for best horsepower
    Aluminum Alloy cylinder head with A+ 'sintered' rocker arms
    Latest Rod-change gearbox with A+ drop gears
    Standard ratio 4-speed with your choice of final drive gears

Complete Standard Classic Mini 1275 Engines with Transmsiion, etc. can also be order from Mini Mania.
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  I've been having quite another chuckle lately at some stuff I've seen in print (and heavily and heatedly discussed by internet) on the subject of 1380cc engines and their professed unreliability. I know I have taken pains to explain that you don't have to have a 1380cc with very spo...
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