SM Head Modifications on a budget
I got the 5 1/2" entry plate finished up and ran a couple of tests this morning. More on that later when I've had a chance to use it more.
I did open the PRP up to 0.995" and still have not broken through. My holes are tubed as well, so I'm not really worried about making a hole. Flow test is attached. As can be seen from the three tests of stock PRP vs 0.950" PRP vs 0.995" PRP, the increased area is helping increase flow up until 0.450" lift. At 0.500" lift, flow separation starts taking over.
So, @pittsburghracer, are we out of easy, cheap options for increasing flow? Are we now searching for area over the short turn to increase high lift flow? Time to address the head bolt bulge? That's still a fairly simple modification.
I got the 5 1/2" entry plate finished up and ran a couple of tests this morning. More on that later when I've had a chance to use it more.
I did open the PRP up to 0.995" and still have not broken through. My holes are tubed as well, so I'm not really worried about making a hole. Flow test is attached. As can be seen from the three tests of stock PRP vs 0.950" PRP vs 0.995" PRP, the increased area is helping increase flow up until 0.450" lift. At 0.500" lift, flow separation starts taking over.
So, @pittsburghracer, are we out of easy, cheap options for increasing flow? Are we now searching for area over the short turn to increase high lift flow? Time to address the head bolt bulge? That's still a fairly simple modification.