Bela,
I suggest you recheck the inlet opening .
At 50 BTDC and closing 64 ABDC it gives a 295 deg duration .
50 BTDC seems excessively advanced or the camshaft sprocket is one tooth advanced on the timing chain .
295 deg duration is more than most sports/racing camshafts, an unlikely fitment for a 400.
I suggest you recheck at .005 clearance cold and also at .002 cold .
Are you sure the TDC mark is accurate ?
Are there 360 deg marks on the crank pulley ?
or how did you read the 50 & 64 ??
Is it possible can you advise the centre line of the inlet lobe .
That is the point of max lift of the lobe . You really need a dial indicator on the valve and read the degrees say a .020 before and .020 after the max lift point. The centre point between those two readings is the accurate centre line. Most standard Bristol cams have a centreline of 110 deg ATDC.
Some aftermarket cams are between 105 - 108 ATDC.
Many well worn engines with worn sprockets and chains run at 113 - 115 deg centreline which is effectively retarded and will lack performance.
Geoff
|