SM Head Modifications on a budget
Daughter's wedding is 6 weeks from today so still busy with the house renovation. Today is wedding shower day and I'm not invited so I get a little shop time this morning.
We last left off with all the easy(ish) modifications complete. The next step was to attack the SSR and apex area. There are 3 ports getting worked at the same time now. This infomation is from post #304 which was the last flow test:
Test 628 is port 3/6 with a 15/30/45/60/70 valve job and a 2.055 valve. This is the port used throughout this entire post.
Test 634 is port 2/7 with a 35/45/60/75 valve job and 2.055 valve.
Test 635 is port 1/8 with a 40/50/65/75/80 valve job and 2.02 valve. The intake valve on this port has been shifted 0.060" and the exhaust port has been shifted 0.080".
This morning I spent 30 minutes total working the SSR on all 3 ports. They were lowered a little (around 0.015"-0.020") at the apex and the SSR was layed back a little to create a larger radius that terminated at the 60 degree bottom cut. Although I did not measure, I would guess that 0.030"-0.040" was removed from the middle of the short turn. No area was intentionally added to the apex area other than that added by working the floor. No cartridge rolls used - this was all done with a double cut 1/2" oval carbide burr.
Results are shown. Now back to the renovation work.
Daughter's wedding is 6 weeks from today so still busy with the house renovation. Today is wedding shower day and I'm not invited so I get a little shop time this morning.
We last left off with all the easy(ish) modifications complete. The next step was to attack the SSR and apex area. There are 3 ports getting worked at the same time now. This infomation is from post #304 which was the last flow test:
Test 628 is port 3/6 with a 15/30/45/60/70 valve job and a 2.055 valve. This is the port used throughout this entire post.
Test 634 is port 2/7 with a 35/45/60/75 valve job and 2.055 valve.
Test 635 is port 1/8 with a 40/50/65/75/80 valve job and 2.02 valve. The intake valve on this port has been shifted 0.060" and the exhaust port has been shifted 0.080".
This morning I spent 30 minutes total working the SSR on all 3 ports. They were lowered a little (around 0.015"-0.020") at the apex and the SSR was layed back a little to create a larger radius that terminated at the 60 degree bottom cut. Although I did not measure, I would guess that 0.030"-0.040" was removed from the middle of the short turn. No area was intentionally added to the apex area other than that added by working the floor. No cartridge rolls used - this was all done with a double cut 1/2" oval carbide burr.
Results are shown. Now back to the renovation work.