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If you are working on your engine and you want to do it right then you should consider how you are going to drive the camshaft. People often spend a lot of time choosing the camshaft and then ignore the exact reason they spent so much time selecting the cam. Driving the cam and controlling the timing relationships between the cam and the crank is what camshaft drive systems are all about. It makes no difference what the cam does if it does not do it in sync with the crank and pistons. The standard system on many 848, 948, 998 and 1098cc engines is a single chain drive between the crank and cam. The 'S' and some 1275 have a much better "duplex" chain. But even those do wear out. The best judge is to check it while you are taking it apart. With the timing cover off the engine rotate the crank a slight amount back and forth. The camshaft must move the exact distance at the same instance.
Fitment of an uprated cam drive system is essential when building a performance engine. Timing scatter induced by the standard set up can reach up to 15 degrees once the single row chain has stretched, which it does after only a few miles. This scatter not only affects the cam timing, but also the ignition, the distributor being driven by the camshaft. Power loss suffered by this phenomenon is substantial. Replacing the standard single row (simplex) system with a dual row (duplex) system greatly reduces the problem; use of a toothed belt system all but eliminates it. The belt system vastly reduces valve train noise and also helps damp out some of the odd harmonics generated by the 3 main bearing 'A' series engine. It is also extremely important to time any cam in to its required setting to obtain maximum performance, especially with performance cams. The 'dot to dot' method can, because of manufacturing tolerances, be out by as much as 15 degrees. Anything above 2 degrees out and power suffers, most noticeably in small bore engines. In race engines you probably lose 1 hp for every degree the cam is out, more when over 6 degrees.
($71.34) £71.34 exc vat
($85.61) £85.61 inc vat
In stockRecommended usage 1 x C-AJJ3325EVO to fit one mini.
Timing cover gasket with 11 holes for cars with timing chain tensioner bulge as standard on all A Plus. We recommend fitting the more expensive original genuine type with anti leak seal for longevity see GUG705550GM.
Pre A plus ...
Genuine Mini Spares Original black timing cover oil seal for all A series until the introduction of a new type of lip seal introduced in 1991 mainly for injection engines, when they changed to LUF10006--albeit many owners fit this not kn...
Mini Spares Non genuine timing chain gasket fitted to every BMC A series engine with 10 gasket holes until the introduction of the A plus type which had a bulge in its side where the tensioner was fitted which had 11 holes.
Gasket material h...
Timing cover front plate and tensioner plate bolt and washer kit. Comes with all parts to fit the cover except for the counter sunk screws if fitting a duplex kit (our duplex kits all come with these).
Adjustable cam gear set with non stretch chain. Cam gear weighs 674g
Even a stock camshaft needs to be timed correctly. If you want to get the maximum benefit from a "hot" cam it is doubly important that the cam timing be correct. This adju...
Ultra light non-adjustable steel duplex timing gear and chain set with locktab and countersunk screws AEA687.
See C-AJJ3325EVO with limited stretch race quality chain.
If you are working on your engine and ...
Countersunk screw for holding the front palte to the crankshaft bearing cap on cars fitted with duplex gears to give the clearance required. 2 required per car.
If you are replacing your timing chain or just doing routine maintenance a new locktab is sure to come in handy.
Race quality heavy duty double row performance endless timing chain. It is the best chain available and used by top engine builders, also fits MGB/Midget. This chain is for duplex gears that is used by racers as a limited stretch heavy duty version m...
A kit to convert the early style cartridge oil filter to the later style spin on filter.
AC Dodd Road Sport Plus camshaft, ultimate road cam, lumpy idle but still driveable. Please see picture for full cam specs.
ACD - RS+
Power Band (Rpm): 1750 - 6500
Duration @ 0.016": 268° 268°
D...
Timing cover front plate and tensioner plate bolt and washer kit. Comes with all parts to fit the cover except for the counter sunk screws if fitting a duplex kit (our duplex kits all come with these).
Mini Spares genuine upgraded part. Hexagon head rocker screw nut in EN24T.
Also available is a flanged nut C-AHT449
Fitting kit comprising of studs, nuts, plain washers, spring washers and a gasket
These Swiftune die cast performance pistons are part of their new Heritage range and are manufactured by global leading F1 German piston manufacturer Mahle. These pistons have been developed using their 50 plus years of experience. Glyn Swift was usi...
These Swiftune die cast performance pistons are part of their new Heritage range and are manufactured by global leading German F1 piston manufacturer Mahle. These pistons have been developed using their 50 plus years of experience.
Glyn Swif...
These Swiftune die cast performance pistons are part of their new Heritage range and are manufactured by global leading F1 German piston manufacturer Mahle. These pistons have been developed using their 50 plus years of experience. Glyn Swift was usi...
This kit of head studs is the best available for road and lightly tuned engines. See the C-AHT280 set for highly tuned engines.
The material spec is alloy steel heat treated to 75 tensile tons per square foot minimum and finish...
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...
Stabiliser bush kit for lower engine steady
Set of +0.003" size 1275 crank thrust washers.
ARP Head stud kit that compromises of;
4 x Long Head Studs
7 x Short Head Studs (Disregard 2 if you're using a 9 stud application)
11 x Multipoint ARP nuts
11 x Heavy Duty Washers
4 x Rocker post studs <...
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?
...
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?
...
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