(¥77) £77.25 exc vat
(¥93) £92.70 inc vat
In stock
If using more boost you need to be working on a lower CR with a total cylinder volume of 55cc in piston/block/head gasket and cylinder head.
Also when increasing boost pressures it is essential to have a modified ignition advance/retard curve to prevent detonation and ensure the inlet charge temperature does not exceed 40 degrees C by the fitment of a suitable intercooler.
If our advice is not followed it is very likley you will break the ring lands on your new pistons.
(¥77) £77.25 exc vat
(¥93) £92.70 inc vat
In stockRecommended usage 1 x P22357-40 to fit one mini.
Race quality Single piston ring pack for Mini Spares Evolution Pistons which also fits Mega and Omega pistons. This uses 3 piece oil ring 4mm and 2 of 1.2mm compression ring.
Sold per piston so 4 packs required per engine.
60 thou oversize low drag slipper type pistons for modern day compression ratios and unleaded fuel.
Typically installation will result in a minimum 8.8:1 compression ratio but on some Metro versions it was higher.
Current pistons ...
Rover piston TAM2048 stamped 21962 with ring sizes 1.501mm and oil ring 4mm but some pistons have been stamped 21963.
-Does this get confusing?
So lets clear it up; the easy way to identify the piston and corrrect rings are as follo...
NPR Ring set for 73.5mm Mega and Omega pistons with 1.2mm thick rings and 3 piece oil rings-also for new range of EVO pistons C-STN101
STD size low drag slipper type pistons with a minimum 8.8:1 compression ratio but on some Metro versions it was higher.
Current pistons differ from the 60s originals, improved with a "low drag" slipper skirt design and a shorter lighter wri...
40 thou oversize low drag slipper type pistons for modern day compression ratios and unleaded fuel.
Typically installation will result in a minimum 8.8:1 compression ratio but on some pre 1984 Metro versions it was higher.
Current...
These are suitable for press fit gudgeon pin late type 998 con rods.
sold individually with rings and pin complete
Ringsets are available as R43240-20
You should replace the camshaft bearings every time the block goes to the machine shop. These bearings fit all late model 1275cc blocks (the ones without tappet covers on the back) It's almost too simple and thus often overlooked during a rebuild. Ca...
Mini Spares best quality complete gasket and seal kit for engine block and gearbox,for all common engine types and sizes.
Also comes complete with Mini Spares Evolution clutch oil seal 13H2934MS, differential oil seals...
ACL Race Bearings
ACL Race series bearings are precision manufactured to a wall thickness of ±0.0040mm giving engine builders close control of vertical oil clearance.
What is the purpose of ACL Race series bearings?
...
ACL Race Bearings
ACL Race series bearings are precision manufactured to a wall thickness of ±0.0040mm giving engine builders close control of vertical oil clearance.
What is the purpose of ACL Race series bearings?
...
ACL Race Bearings
ACL Race series bearings are precision manufactured to a wall thickness of ±0.0040mm giving engine builders close control of vertical oil clearance.
What is the purpose of ACL Race series bearings?
...
ACL Race Bearings
ACL Race series bearings are precision manufactured to a wall thickness of ±0.0040mm giving engine builders close control of vertical oil clearance.
What is the purpose of ACL Race series bearings?
...
Originally developed by Rover to cut down on warranty hourly costs on powertrain warranty repairs, by their main dealers.-Labour time allowed at Rover dealers for fitting this seal was 3.4 hours labour rate.
This is a special rigid seal and ...
You should replace the camshaft bearings every time the block goes to the machine shop. These bearings fit all 1275cc blocks plus 970 and 1071 Cooper S. It's almost too simple and thus often overlooked during a rebuild. Camshaft bearings are pressed...
Water pump fitting kit for models without bypass facility, includes new bolts, washers and superseal gasket.
Price per rod-1275cc larger 6.35mm diameter push rod. Sold per single rod and 8 required per engine.
The larger diameter improves push rod rigidity as much as possible
without having to modify the block/head push rod ports. Thi...
Mini Spares cam follower with original convex bottom Radii as used by BMC/Rover and made by Clanceys but less the oil hole. Using Clancey drawings and to our design for better cam performance and lift we have made the push rod recess deeper for stabi...
Set of +.030 thrust washers for 1275.Very useful for machining down when fitting non S cranks in 1275cc block
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