T/A heads
i have a couple of sets of TA heads here.
This first set are just going on a mild street motor.
They had a fresh valve job, guides, resurfacing.
The surface job looked kinda like a very coarse mill bastard file.
Seats were done with stones(nothing wrong with that), but they could have dressed the stones a bit more often.
You can hardly even make out the angles.
If you look at the exhaust seats closely, you can see the width of the 45 seat varies quite a bit.
The guides were knurled on the intake, and the exhaust had 1/2” iron grooved replacements.
I’m not really fond of either of those, so I put liners in the intakes and swapped out the exhaust for 1/2” bronze.
They weren’t really here for any “performance enhancements”, but the intake bowl diameters varied quite a bit, and there was a slight step in the exhaust bowl after I installed the hardened exhaust seats.
I didn’t do any work at all to the runners....... just the most basic of a bowl blend.
Here is how they flowed as rec’d:
Lift———in/ex
.100—- 60/44
.200—-120/88
.300—-174/113
.400—-204/126
.450—-207/128
.500—-206/131
.550—-204/132
.600—-206/133
i have a couple of sets of TA heads here.
This first set are just going on a mild street motor.
They had a fresh valve job, guides, resurfacing.
The surface job looked kinda like a very coarse mill bastard file.
Seats were done with stones(nothing wrong with that), but they could have dressed the stones a bit more often.
You can hardly even make out the angles.
If you look at the exhaust seats closely, you can see the width of the 45 seat varies quite a bit.
The guides were knurled on the intake, and the exhaust had 1/2” iron grooved replacements.
I’m not really fond of either of those, so I put liners in the intakes and swapped out the exhaust for 1/2” bronze.
They weren’t really here for any “performance enhancements”, but the intake bowl diameters varied quite a bit, and there was a slight step in the exhaust bowl after I installed the hardened exhaust seats.
I didn’t do any work at all to the runners....... just the most basic of a bowl blend.
Here is how they flowed as rec’d:
Lift———in/ex
.100—- 60/44
.200—-120/88
.300—-174/113
.400—-204/126
.450—-207/128
.500—-206/131
.550—-204/132
.600—-206/133