T/A heads
For comparison...... some brand X stuff:
Last summer I did the same basic job to a set of 1969 Chevy 302 z-28 heads.
Those already had the exhaust seats installed, and whoever did them used a radius cutter for both intake and exhaust.
I recut both seats and blended the bowls, radiused the short turns, deburred the chambers adjacent to the valve seats.
As rec’d:
Lift———in/ex
.100—- 65/48
.200—-121/90
.300—-171/111
.400—-200/124
.450—-208/127
.500—-215/129
.550—-219/129
.600—-219/129
For comparison...... some brand X stuff:
Last summer I did the same basic job to a set of 1969 Chevy 302 z-28 heads.
Those already had the exhaust seats installed, and whoever did them used a radius cutter for both intake and exhaust.
I recut both seats and blended the bowls, radiused the short turns, deburred the chambers adjacent to the valve seats.
As rec’d:
Lift———in/ex
.100—- 65/48
.200—-121/90
.300—-171/111
.400—-200/124
.450—-208/127
.500—-215/129
.550—-219/129
.600—-219/129
