I've got the exhaust port opened up to where even Lancer and Clive will like it now
But in the process I thought that I'd get some figures together concerning the Savage exhaust.
Some of these are hard to believe but numbers don't lie
First of all, calculating the area of both exhaust valve seats with an ID of .900" (and subtracting the area of the 2 valve stems), the maximum exhaust area for 2 stock exhaust valves is 1.100 in sq.
Then figuring the area of the stock exhaust port with an ID of 1.340 ", we get a total outlet area of 1.409 in sq.
Then figuring the area of my new exhaust port with an ID of 1.437", we get a total outlet area of 1.618 in sq. (Almost 15% larger...)
Then in figuring the area of the Raask pipe with an ID of 1.500", the total area is 1.766 in sq.
Now my exhaust port ID is only 1/16" less than the Rassk.
I forgot to measure the stock header. Anyone got that ID number?
I can almost poke my fingers through the exhaust port and out the valve seats