Speedmaster Small block porting tips and results Part 1

Cudafever said
just to help a little
these are PBR out of the box####

I finally bolted one of my heads down on the flowbench today and got some numbers. I bought mine bare so these numbers are with one used Edelbrock exhaust valve and one used 2.02 Edelbrock intake valve with a 30 degree backcut added. Other than that as out of box

.100——55
.200——131
.300——185
.400——-235
.450——-247
.500——-240. Numbers backing up
.600——-246
.700——-256-262 turbulence
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and these are afterwards.

.100———-68 cfm
.200———-142
.300———-198
.400———-244
.500———-252
.600———-262
.700———-262
.750———-258

UPDATED

just to help a little
these are PBR out of the box####

I finally bolted one of my heads down on the flowbench today and got some numbers. I bought mine bare so these numbers are with one used Edelbrock exhaust valve and one used 2.02 Edelbrock intake valve with a 30 degree backcut added. Other than that as out of box

.100——55
.200——131
.300——185
.400——-235
.450——-247
.500——-240. Numbers backing up
.600——-246
.700——-256-262 turbulence

After that test I added a 30 degree and 15 degree cut to the factory 60 and 30 seat cuts from the factory. I then widened the .930 measurement at the pushrod pinch to the 1.015 measurements given to me from the cnc’d heads from Speedmaster. I then removed the slight overhang right before the seat on the shortside. I then took a 40 grit sanding roll to the whole port and mounted it for my second flow test. Before and after number side by side.
Before—————-after
.100——55——————65
.200——131—————137
.300——185—————-194
.400——235—————-240
.450——247
.500——240—————250
.600——246—————265
.700——256-262———263

ok between a late night last night, bad right side pain again, and getting up for Church I had a bad case of dragging butt today. I watched the first possession of the Steelers and I could read the writing on the wall so I took a nap, watched the news, and hit the shop. I saw on the flowbench what I expected for the work I did and not reshaping the shortside. Just because a head CAN flow more air doesn’t mean it will. I’ll post the numbers and while I eat if you want to take a guess what happened please post up. Then I will show you why.

.100———-68 cfm
.200———-142
.300———-198
.400———-244
.500———-252
.600———-262
.700———-262
.750———-258