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100/4 Bottom End
100/4 WINDAGE TRAY
Looking for the last few horse power, scrape away the oil mist from around the
crank with this modern race engine trick.
Designed to fit with either a steel crank and rods, or the original and our aluminium sump. Only an extra sump gasket required as this sandwiches between the sump and cylinder block.
As proven with use in the Endurance Record Car, which went on to compete in a
seasons racing after completing the 1000km run.
100/4 TACHO DRIVE
TACHO DRIVE GEAR NOW AVAILABLE
A reproduction of standard.
Another product developed and produced by Denis Welch Motorsport.
Over time many historic and classic car parts begin to disappear and become obsolete. Due to demand Denis Welch Motorsport take time to research, develop and manufacture brand new components to keep these amazing cars on the road and track.
LIP SEAL FRONT COVER
'NEW Design that improves the original'
Our new 100/4 Lip Seal Cover is another product from Denis Welch Motorsport that has been taken back to the drawing board and improved in a new form.
For many years we have had to modify original front covers by sourcing or using customers existing parts. By cutting out the felt seal housing and using a special jig, weld in a new housing for a modern lip seal.
Following a complete redesign and using our new tooling based on the original works drawings, we are now making new covers with superb quality engineering.
LIP SEAL FRONT COVER - 'EXCHANGE'
Fabricated from an original pressed steel front cover (provided by the customer or Denis Welch Motorsport), we will remove the existing felt seal and with a special jig then weld in a new housing for a modern lip seal.
Ideal for rolling road or dyno tuning.
We also have 100/4 Lip Seal Covers with a removable inspection plate to change the cam timing if used with our vernier cam sprocket.
(Please see extra images)
Both of these products are available with a turned steel housing welded in position to enable the fitting of a proper lip seal (supplied) for the crank pulley.
100M PISTONS
Our 100M Die Cast pistons are made specially for us by Omega, one of Britain's leading competition piston manufacturers.
They have the original 100M dish of 14CC which will give a compression ratio of approximately 8.5:1, providing the cylinder head and block have not been skimmed.
Being lighter and having a better design than the original they are not only stronger for performance use but are also quieter for road use.
We have used metric sizes in order to take advantage of the latest ring technology and reduce crank case pressure.
They are supplied with gudgeon pins to suit standard clamp conrods (gudgeon pins for fully floating rods are available to order) The sizes stated are the actual bore sizes, all clearances have been allowed for on the piston.
FLAT TOP PISTONS
Forged by Omega for maximum strength. These give an approximate compression ratio of 10.5:1 the crown is of sufficient thickness to allow a 6CC dish to be machined in if a slightly lower compression ratio is required.
They are supplied with plain Gudgeon Pins to suit fully floating con rods (Gudgeon Pins for standard clamp rods are available to order)
Price stated is for a full set.
CYLINDER LINERS
Good quality cast iron straight plain Cylinder liners, available in three sizes, all over 8 inches (203mm) long and require shortening after fitting.
Approximate dimensions are:
ENG417B 3.543"od 3.346"id (90.0mm x 85mm)
CENG417 3.562"od 3.374"id (90.47mm x 85.7mm)
CENG417A 3.597"od 3.441"id (91.36mm x 87.4mm)
Prices stated are per item.
STEEL CRANKSHAFT
Our Steel Crankshaft is made from EN40B and Nitride hardened.
This steel crankshaft is made with the Works type 8 bolt fixing for the flywheel and is also ground ready for our rear oil seal kit.
Requiring no additional machining to fit as it uses the standard main bearings and original 111.1mm stroke.
It can only be used with our Steel Con Rod Set (CENG432R).
For the person who wants the ultimate in performance, these obviously strengthen the bottom end considerably and mean that the engine can be reved safely to very high limits.
STEEL CON ROD SET
These are Carrillo style with conventional fully floating little ends and can therefore only run with pistons that contain circlip grooves (i.e. our pistons CENG409, CENG410, CENG411 and CENG409F). These are considerably lighter and stronger than standard ones.
Two types available, the 100/S fits with the standard 100/4 crank sizes or the others to suit our steel cranks with better quality big-end shells.
REAR CRANKSHAFT OIL SEAL CONVERSION KIT
When fitting this kit to the 100 it will require some machining to the crankshaft and cylinder block so therefore can only be fitted during a total engine rebuild. Although full instructions are supplied it is recommended that this kit is fitted by us or a qualified engineer. (A 4.2mm Drill & M5 Tap is also required).
It is worth spending the money as, when fitted correctly, it really does stop those annoying oil leaks!