Flow Sheets

Solanki Performance

Flow Sheets

Here are some of the flow sheets taken on my Superflow 600 flowbench. I have factory R1, R2, and R3 flow numbers along with various ported and polished R1 and R2 heads that flow better than factory R3 heads. I also have flow sheets on my reproduction R3 heads that have far better flow and velocity characteristics than any Studebaker heads including the R3 heads.

The following chart contains flow number of FACTORY R3 heads with NO modifications. Take a note at how the factory R3 heads vary on the flow numbers. This was so because the factory R3 heads were hand polished by the technicians at Paxton Products. Again, the numbers are from GENUINE R3 cast iron heads with factory R3 valves!

Factory R3 Head Flow Numbers (casting # 1555479)
	From Engine Serial # B103, B108, B39

	Intake B103	Intake B108	Intake B39

Lift (in)	CFM	CFM	CFM
0.050	32.5	25.8	28.9
0.100	62.7	54.1	66.2
0.150	96.1	83.4	84.7
0.200	119.9	107.4	101.0
0.250	139.5	127.9	124.2
0.300	151.0	141.9	135.6
0.350	162.5	148.6	156.3
0.400	171.3	155.9	144.8
0.450	178.0	163.7	159.3
0.500	182.5	170.7	154.8
0.550	187.6	176.6	168.9
0.600	191.0	182.2	173.5
0.650	194.3	188.6	180.3
0.700	195.8	191.3	186.2

All flow data acquired at 28 inches of water.
No modifications were done to these heads.
These are STOCK R3 heads with R3 valves as they came from the factory.

Here are flow numbers on my reproduction cast iron R3 heads. These heads look exactly the same as factory R3 heads from the outside. As you can see the floor is higher and the roof is lower than the factory R3 heads. This was done to improve on the velocity profiles. Also notice that the combustion chamber design is different to improve on swirl properties and the overall quaility of mixture. These heads feature the "1555479" casting number on the center exhaust port so they look identical to the genuine R3 heads. These heads are a SERIOUS improvement over the factory R3 heads and the numbers prove it! I have only produced 14 sets of these heads and they are scattered all over the United States. About 2 more sets will be produced for racing applications.

Reproduction R3 Heads in Cast Iron By N. Solanki
Tested with 1.875" intake and 1.625" exhaust valves
Stage II Stage III Stage IV
Lift (in) CFM CFM CFM
0.050 30.8 31.1 35.7
0.100 56.8 58.8 63.5
0.150 80.6 86.2 91.8
0.200 101.8 108.7 116.3
0.250 121.1 131.3 138.7
0.300 143.3 149.9 159.9
0.350 158.1 167.9 177.4
0.400 173.2 184.7 191.3
0.450 185.7 198.9 211.7
0.500 193.9 207.7 219.2
0.550 200.2 213.2 223.7
0.600 203.6 217.8 227.8
0.650 205.5 217.9 231.1
All flow data acquired at 28 inches of water.