14 - . Again the engine. . Grinding End stage and lightening

! Remember this picture !
In Chapter 17 we will see another color



The engine is out of the grinder, is set with the new crankshaft bearings oversize and com camshaft and rear bearing . The pistons and liners have their original measure 86 mm , the crankshaft connecting rod bearings have been adjusted on a + 0.20 and the main bearing crankshaft to +0.30.





The rear bearing modern installation , instead of stuffing original, has required the crankshaft lower at 63.5 mm , which will eliminate the typical oil drips back into the engine .





Crankshaft with the back machined

They also drill new holes to hold the clutch diaphragm and has been used to reduce flywheel weight about 2 kg . This is important as it reduces inertia , both in acceleration and braking.







Replacing three-point clutch pressure by diaphragm TR4A model provides a smoother and gradual behavior .


In the picture we can see the new diaphragm clutch and flywheel faced about once balanced and poised .

To brake , it is customary not to step on the clutch to get the engine braking of a 4-stroke engine . However, the rotational inertia of two heavy elements such as the crankshaft and flywheel play against and transmit its drive wheels. The decision of the clutch or braking driving is a decision that at a given time can be best done under braking to the limit.

Reduce weight flywheel and crankshaft without compromising its sturdiness , it is a good option to give greater elasticity to the motor ( up and down turns with agility ) and reduce the inertial effect . Two kg weight less turning 40 times per second ( 2000/3000 rpm ) which represent a considerable inertia is also transmitted to the wheels.


Once machined flywheel , another action taken in this phase has been to balance the camshaft , crankshaft and flywheel in order to remove all eccentric behaviors .

Equilibration is obtained with the cranks in the linear motion to transmit full power balanced circular rotation to the crankshaft and flywheel about its longitudinal axis of rotation , eliminating all behaviors involving elliptical performance loss , a higher vibration and increased mechanical wear .



Not lightened weight or rods or crankshaft because it is not competing with this engine , plus the rotational kinetic energy is proportional to the moment of inertia and the square of the angular velocity . The Triumph will not have to turn too many turns . The moment of inertia is proportional to mass and the square of the radius of the disk, where the inertial effect is most noticeable in the flywheel as it has a considerable size .

Not so with the neighboring bank beside a SEAT 1430, engine 2000 , that this boy if he expected a harder life since it will compete in hill climbs for sport classics. I show pictures of what makes Gonzalo Delta - Carburació .



THESE ARE NOT THE TRIUMPH CRANK are a SEAT 1430/2000 engine , you can see the difference between the original state and lightened , not only are able to eliminate weight but also reduce stress concentrations that accumulate in the corners .






Now we just need to put every piece in place ....


End of Chapter XIV, the next chapter " Engine Assembly " do not miss ... if you look at the end works again .

Meanwhile you have to wait for the new oil pump , new front bearing rocker arms and camshaft .