× 1-800-946-2642 Home My Account Social / Forum Articles Contact My Cart
Shop Now
Select Your Car Type Sale Items Clearance Items New Items
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 Classic 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, magnaflux'd, bored and painted. The Classic Mini Cooper 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. The Mini motor uses Evo  9cc dished pistons, which are specifically designed for this application. Elgin supplies the custom ground camshaft, which is driven by a new timing chain and gears.

The built Classic Mini engine is mated with a gearbox, with flywheel and clutch assemblies all in place. These late model Mini Cooper rod change transmissions are also fully rebuilt and painted, and in the base configuration are assembled with a 3.44 final drive.

Optional kits to install the power-unit in earlier model Classic Mini Coopers are available. An optional remote shift box can be equipped too.

Note: There is NO CORE CHARGE!  And if you want to save even more money, call us about our 'Trade In' Program that allows you to get money back on your old (1275cc) engine!

Specifications:
  • 73.5mm squeeze-cast pistons
  • 10:1 Compression
  • 10/10 Crank
  • Elgin CAM003 carefully timed in at 107º for best horsepower
  • 11-Stud Aluminum Cylinder Head With Big Valves
    These power-units are hand built with care, stand tested and tuned (final tuning, of course, is always done in the Mini). Shipped palletized and protected, the power-units are ready to bolt in and run.

Engines built by Mini Mania are warranted by Mini Mania for 12 months or 12,000 miles (which ever comes from first). Non-refundable $1,000 deposit required.

Let us build you the engine you need! Call us at 800-946-2642 for your customized rebuild.



Mini Mania Engine Comparison Tool - 1380 cc


  1380_ENGINE 1380HP_ENGINE 1380HP_ENG_ULT 1380HP_ENG_5SPD
Cast Iron Head      
Aluminum Head  
3.4 Differential
3.1 Differential        
3.2 Differential        
4 Speed  
5 Speed      
LCB Header    
Elec. Distributor    
Carb System    
Distributor Wires    
Duplex Timing Kit  
ARP Studs  

 

Interested in a 1275cc rebuilt engine?  We have those too.

Mini Mania - where Classic Mini Rebuilt Engines are for Sale

The "Ultimate Street Performance Engine"  1380cc Classic Mini engine is mated with a gearbox, with flywheel and clutch assemblies all in place. These late model Mini Cooper rod change transmissions are also fully rebuilt and painted, and in the base configuration are assembled with a 3.44 final drive.

Optional kits to install the power-unit in earlier model Classic Mini Coopers are available. An optional remote shift box can be equipped too.

Classic Mini 1380 High Performance Engine & Transmission Complete

Classic Mini 1380 High Performance Engine & Transmission Complete

Classic Mini 1380 High Performance Engine & Transmission Complete
Selected: 1380cc High Performance Engine
$9625.98
Qty:
Specially Priced. Discounts Do Not Apply.
Fits the following:
Classic Mini
Big-Bore Power Unit Engines 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-unit engines can be customized to meet the particular needs for your Mini Cooper. Just ask your friendly Mini Mania Sales Technician for a custom power-unit quote.

About The "Ultimate Street Performance Engine"

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 large valve cast iron heads and 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 included with this motor:

Note: No core charge and call us if you are interested in 'trading-in' your old (1275cc) engine!

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

Specifications:

  • 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
  • Large valve cast iron 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

 

Mini Mania Engine Comparison Tool - 1380 cc


  1380_ENGINE 1380HP_ENGINE 1380HP_ENG_ULT 1380HP_ENG_5SPD
Cast Iron Head      
Aluminum Head  
3.4 Differential
3.1 Differential        
3.2 Differential        
4 Speed  
5 Speed      
LCB Header    
Elec. Distributor    
Carb System    
Distributor Wires    
Duplex Timing Kit  
ARP Studs  

 

Interested in a 1275cc rebuilt Classic Mini engines and powerunits?  We have those too.

Mini Mania - where Classic Mini Rebuilt Engines are for Sale

Interested in this engine? Contact us at 1-800-946-2642 to speak with a specialist.

Ask any group of Classic Minis enthusiasts what feature they wished their Mini had, and one of the top answers will be "a FIFTH gear"!  This is particularly true when the car has a nice big torquey engine like one of our 1380cc custom-built powerunits.  We have built literally hundreds of these over the years, but only a special few have been equipped with one of the aftermarket 5-speed gearboxes.

In recent years, the five speeds have been produced in small numbers a few at a time, so not uncommon to find yourself on a waiting list. We at Mini Mania know this so when we want one, we often try to order two! 

At least one of them is going to help make up a 'dream engine' package, coupled with one of our 1380 HP A+ Engines. The 5-speed is configured to match the original 60s Cooper S close ratio gear box, but with a fifth gear overdrive that lets you and your Mini relax on a modern highway. This eliminates the compromise that MUST be made with a 4-speed - Do I want a high-revving engine on the highway, or do I want to burn my clutch getting the car moving?

This engine package will out-perform the fire-breathing original Cooper S while matching its fun to drive point and shoot, nimble handling manners that humble far higher spec competition to this day. Your Mini will jump off the line with authority, each gear perfectly placed for the engine powerband. But when you're not auto-crossing, or enjoying your favorite winding road, you can put this one in fifth and actually take it somewhere!

On Paper:

* A+ Block fully prepped and off-set bored to 1380cc
* 10.5 to 1 compression Evo 9cc dish  pistons
* Reground A+ crank with +.010" or +.020" bearings
* Resized A+ rods with ARP rod bolts
* Elgin Street performance cam with matching oil pump
* Aluminum cylinder head with quality valves, springs, and bronze guides
* ARP head stud kit. Block modified for 11 studs. New hardware and fasteners as required throughout
* HIF44 Carb with BDK needle, complete with all mounting brackets, cables, intake manifold, and K&N filter
* Standard Maniflow LCB header to work with intake kit
* Helical cut close ratio 5-speed overdrive with cross pin differential and 3.44 final drive.(equivalent to about a  3.05 : 1 final drive 4-speed in overdrive 5th)  Rod change shift linkage only. Kit available to upgrade earlier cars
* Electronic A+ Distributor and 8mm Plug Wires        
*Ask about other popular upgrades with at least a 15% discount: Stage 1 big valve head, roller rocker set, lightweight flywheel, adjustable timing set, twin carbs or Weber DCOE, Big bore header, etc.

On the Road:

Unbelievable!!


Mini Mania Engine Comparison Tool - 1380 cc


  1380_ENGINE 1380HP_ENGINE 1380HP_ENG_ULT 1380HP_ENG_5SPD
Cast Iron Head      
Aluminum Head  
3.4 Differential
3.1 Differential        
3.2 Differential        
4 Speed  
5 Speed      
LCB Header    
Elec. Distributor    
Carb System    
Distributor Wires    
Duplex Timing Kit  
ARP Studs  

 

Interested in a 1275cc rebuilt engine?  We have those too.

Mini Mania - where Classic Mini Rebuilt Engines are for Sale

Same as our 1380HP build but adds an LCB Exhaust header and an HIF44 Carb set up. The engine in the photo has dual HS4 carburetors, which is optional. Plus, it comes complete with electronic distributor and wires.

Ready to install in your Classic Mini!

Mini Mania Engine Comparison Tool - 1380 cc


  1380_ENGINE 1380HP_ENGINE 1380HP_ENG_ULT 1380HP_ENG_5SPD
Cast Iron Head      
Aluminum Head  
3.4 Differential
3.1 Differential        
3.2 Differential        
4 Speed  
5 Speed      
LCB Header    
Elec. Distributor    
Carb System    
Distributor Wires    
Duplex Timing Kit  
ARP Studs  

 

Interested in a 1275cc rebuilt engine?  We have those too.

Mini Mania - where Classic Mini Rebuilt Engines are for Sale

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 Classic 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, magnaflux'd, bored and painted. The Classic Mini Cooper 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. The Mini motor uses Evo  9cc dished pistons, which are specifically designed for this application. Elgin supplies the custom ground camshaft, which is driven by a new timing chain and gears.

The built Classic Mini engine is mated with a gearbox, with flywheel and clutch assemblies all in place. These late model Mini Cooper rod change transmissions are also fully rebuilt and painted, and in the base configuration are assembled with a 3.44 final drive.

Optional kits to install the power-unit in earlier model Classic Mini Coopers are available. An optional remote shift box can be equipped too.

Note: There is NO CORE CHARGE!  And if you want to save even more money, call us about our 'Trade In' Program that allows you to get money back on your old (1275cc) engine!

Specifications:
  • 73.5mm squeeze-cast pistons
  • 10:1 Compression
  • 10/10 Crank
  • Elgin CAM003 carefully timed in at 107º for best horsepower
  • 11-Stud Aluminum Cylinder Head With Big Valves
    These power-units are hand built with care, stand tested and tuned (final tuning, of course, is always done in the Mini). Shipped palletized and protected, the power-units are ready to bolt in and run.

Engines built by Mini Mania are warranted by Mini Mania for 12 months or 12,000 miles (which ever comes from first). Non-refundable $1,000 deposit required.

Let us build you the engine you need! Call us at 800-946-2642 for your customized rebuild.



Mini Mania Engine Comparison Tool - 1380 cc


  1380_ENGINE 1380HP_ENGINE 1380HP_ENG_ULT 1380HP_ENG_5SPD
Cast Iron Head      
Aluminum Head  
3.4 Differential
3.1 Differential        
3.2 Differential        
4 Speed  
5 Speed      
LCB Header    
Elec. Distributor    
Carb System    
Distributor Wires    
Duplex Timing Kit  
ARP Studs  

 

Interested in a 1275cc rebuilt engine?  We have those too.

Mini Mania - where Classic Mini Rebuilt Engines are for Sale

 
 
Question:
I have a 76 Classic Mini...I removed the stock 998cc and wondered if the 1380HP will fit? I plan on doing the full brake conversion and possibly the full suspension upgrade as well.
Answer:
Yes, a 1380cc engine would fit fine. The footprint of all of the A-Series engines is basically the same regardless of displacement.

Mini Mania Tech Team

The Classic Mini Parts and Accessories Experts

 
 
Loading...
Loading...
Loading...
Related Technical Articles:
Classic Mini Engine - Identification Data UPDATED
Created: September 05, 2003
If you have the engine tag still attached to the engine - just in front/below the thermostat housing - or perhaps the original engine number in the log book then the following should help you determine which engine you have. For Metro units, see 'Engine - Metro identification data'.
ENGINE - Reliability of the 1380
Created: December 12, 2002
I know I have taken pains to explain that you don't have to have a 1380cc with very sporty cam profile and so on to have a decent, satisfyingly quick road car - but this reliability problem is absolute hogwash.
Classic Mini Cooper ENGINE TRANSPLANTS -
Created: October 31, 2000
Is this familiar? - You take the small one out; you put the big one in. In, out, in, out, shake your fist about, you do the hokey-cokey and you turn around, that’s what it’s all about...kinda sums up the situation many folk find themselves in when attempting to endow their beloved Mini with a more impressive turn of speed.
How Much is Your Classic Mini Really Worth?
Created: September 16, 2016
Your Classic Mini is more than a car, it's an investment.
Killer Engines from Mini Mania
Created: November 01, 2017
Let our experts build you a brand new "Killer" classic mini race engine that'll give you the edge you’ll need to put you in the Winner's Circle! Built with the latest cutting-edge components.
Pre-Owned & Tested Powerunits
Created: October 31, 2017
These pre-owned Classic Mini power units have been tested by the experts at Mini Mania for compression, oil pressure and blow-by. Our pre-owned assemblies includes everything from cylinder head to clutch and transmission and are ready to bolt in to your Classic Mini and go!
Loading...
Loading...
Loading...