12-12-2018, 11:19 AM
The c/m shell was indeed supplied by Jamie at The Seven Workshop; it did require modification to suit the A7 engine installation as described in my earlier post. Having now measured the crush by tightening both c/m fixings and then releasing one of them the crush on the shells was measured at 4thou, which is a good figure.
Regarding c/m fixings: tightening to 30lbft is the figure that results in distortion of the housing causing tightening of the bearing on the crank. A figure of 25lbft did not distort the housing to any significant extent so this is the figure I have used.
Tappets now modified with a 2" radius, tappet guides modified accordingly - anything I can do to squeeze even a fraction more performance out of the little engine can only be a good thing when you're being hunted down by modern cars.
Engine is assembled and ready do go back in the car - hopefully in time for Christmas!
Ray
Regarding c/m fixings: tightening to 30lbft is the figure that results in distortion of the housing causing tightening of the bearing on the crank. A figure of 25lbft did not distort the housing to any significant extent so this is the figure I have used.
Tappets now modified with a 2" radius, tappet guides modified accordingly - anything I can do to squeeze even a fraction more performance out of the little engine can only be a good thing when you're being hunted down by modern cars.
Engine is assembled and ready do go back in the car - hopefully in time for Christmas!
Ray