SM Head Modifications on a budget
Here's the baseline data. Test 598 is the stock port tested with a single angle 2.02 Speedmaster valve. Test 597 is the stock port tested with another Speedmaster 2.02 valve from the same box of valves but with a 30 degree back cut from the Redneck back angle jig. Since the Redneck jig seemed to make some people cringe, I thought it would be fitting to test the Redneck valve against a 'properly' backcut valve. So, I got out the valve grinder and made the valve for Test 599, which is again the stock port with another SM 2.02 valve from the same box cut to 30 degrees.
Here's the baseline data. Test 598 is the stock port tested with a single angle 2.02 Speedmaster valve. Test 597 is the stock port tested with another Speedmaster 2.02 valve from the same box of valves but with a 30 degree back cut from the Redneck back angle jig. Since the Redneck jig seemed to make some people cringe, I thought it would be fitting to test the Redneck valve against a 'properly' backcut valve. So, I got out the valve grinder and made the valve for Test 599, which is again the stock port with another SM 2.02 valve from the same box cut to 30 degrees.