MG Midget and Sprite Challenge CLASS D Racing Engine

It is built to the specifications below.

Our 2023 spec engine has shown figures of 144bhp and 126lbft over winter testing!

• Selected 1275 Engine Block - 11 Stud Conversion, Crank Shaft, Con Rods.
• Chemically cleaned, Thoroughly checked, and inspected.
• Machined to include, Boring +.060 (1330) or 83.5mm (1380) Speak to us with your requirements for CC for your race series.
• New Cam bearings, Skimmed fire face, 11 Stud Conversion.
• Block-Face water galleries plugged to FIA Spec.
• Machined Centre Main - Centre Strap.
• MED Rear Oil Seal Conversion to rear main cap
• New Core Plugs (Water and Oil)
• Balanced, Lightened, Knife-Edged / Wedged and Machined crank - Balanced to Rods, Front Pulley, Clutch and Flywheel
• Balanced STD Midget Rods with ARP Bolts
• Steel Flywheel
• Helix Autosport 7.5" Clutch
• New Race Main Bearing Shells.
• New Thrust Washers, Shimmed correctly.
• New Race Big End Bearing Shells.
• OMEGA Forged Race Pistons
• Vernier Timing Belt Kit Fitted and Shimmed with Crank correctly.
• MCCS / Piper Race Camshaft - Speak to us about your requirements.
• Timed Correctly.
• New Large Impeller Water Pump
• Distributor Drive Fitted.
• New iSKY Cam Followers
• New Competition Push Rods
• MCCS Full Race 12G940 Cylinder Head - 11 Stud
• COMETIC Head Gasket
• Built using ARP Con Rod Bolts and Cylinder Heads Studs.
• New Roller Rocker Assembly. Aligned Correctly and Shimmed for correct geometry.
• 2 Piece, Balanced Crank Pulley
• MCCS 25mm Breather Rocker Cover w/fixings
• MOCAL Oil Cooler Kit Supplied
• Oil Pressure Sensor Fitted.
• Oil Pressure Relief Valve Fitted.
• Sump modified with Baffle.
• MCCS 25mm Breather Timing Cover fitted.
• All new hardware, New Gaskets.

Retro Sport (DSN) Billet Upgrade for

• Pressure Relief Valve Nut
• Rocker Cover Bolts
• Fuel Pump Blank (where block requires)

Please note: Where a customer supplies their own engine for reconditioning or modification, we will use that engine and its components unless there is a defect or fault that does not allow for a rebuild. At this point a suitable like for like will be used from our core stock. For 1275cc based applications, We have MG Midget / Austin Healey Sprite and Morris Marina core units. For reconditioned standard road units, unless otherwise requested we will just pull the next core from stock. For our GT and RS packages we will pick the next cores that are either Standard or on their first oversize and will be built using EN16T Crankshaft. Race applications, where the regulations require a specific engine casting we will build using that exact casting, where the regulations are open with engine variations, we will build using the next cores that are either Standard or on their first oversize and will be built using EN16T (or where applicable EN40B) Crankshaft.

If you have an exact requirement, please specify at the very start, make it clear. What ever the application, we will pick the most suitable core and machine to exacting standards, you will receive the very best engine for your application. That's an MCCS promise.

We always try to give an accurate and honest time frame for your engine builds, being in control of the machining and build has allowed us to monitor the times with the only out sourced aspect being the testing.
Due to the successes our race clients are enjoying with our engines along with the consistency of our Road builds, we have found our selves picking up a lot of new Race clients along with supplying some of your favourite classic car specialists both domestically and overseas. With this comes pressure on us to meet the demands from these sometimes time critical builds. We have therefore taken the decision to advertise our road builds on a 6 month build plan. If this looks like it may increase we will let you know at the first signs of it. Last year was our biggest year for trade and Race clients, we have a small team here but we trust each other and know the quality we work to.

The 6 month build plan is based on all of our set engine packages. Builds that are bespoke to your requirements may take longer.

Race and Trade clients please contact us before ordering.

We have removed shipping from the website checkout due to the ever-changing shipping rates for such large items.
We use wooden shipping crates for international orders and restrain the engine for secure transit. Please reach out to us for a quotation for shipping your engine.

Engine Surcharge

This engine is sold on the basis of having an exchange unit returned to us or working on your own unit. If you do not have a unit to supply us with this is not a problem however there is a £500 (for large bore engines) surcharge that will be applied with your final payment.

Engine Payments

If you have found the engine that you wish to purchase from MCCS, you can place your order online or we can create your order for you. 

To secure your build slot, We only ask for £100 upfront. Once we have completed your machining we then take 50% of the remaining balance (we do not store payment details so we make contact with you at this point) We then complete the build and only when complete and ready for you to collect do we require the remaining balance.

If you order online you have two payment options, Debit / credit card or Bank Transfer. If you choose card then the system will charge the full balance of the order so we ask that you pay via bank transfer and send £100 to begin with.