|
Thank you visiting Dr. J's Performance The Home of Innovative Air Flow Technology. We are constantly updating the web site with new information, so please be sure check out the cylinder head database for all the latest flow numbers on heads ported here and Dr. J's performance.
Latest News
Hot Rod Magazine tests Dr J's Performance ported intake manifolds in the February 2008 issues. To read how Dr J's ported intakes increased the horsepower on Mike Morgans 400 small block chevy please click on the link. The Manifold Man
Check out the complete engine build up on Mike Morgans 615 hp pump gas small block chevy with Dr J's performance ported Heads and Intake in the new Max Chevy
-
Dr J's Performance Patriot Plus SBC Cylinder heads
Heads include the following
- 195 cc intake runners
- 2.08 stainless steel intake valves
- 1.625 stainless steel exh valves
- Chromoly retainers with 10* locks
- 1.46 dia dual valve springs for up to .600 lift (will work on Hyd Roller cams)
- 3/8" Studs and Guide Plates
 Competition Valve Job
- 5 angle anti reversion intake valve seat form
- Fully radius exhaust seat form
- Chambers swept to head gasket size to increase radial clearance on the valve
- 30 degree back cuts on intake and exhaust valves
- radius top on exhaust valves
- Bowls are blended into the short turns on the intake and exh
- Chambers Ported to enhance swirl and hand finished
Heads are milled to your desired chamber volume and finished for MLS gaskets.
- Dr J's Performance Patriot Plus Heads $ 985.00 + shipping
- Competition Porting + $575.00
Flow Numbers Dr J's Patriot Plus SBC
As Cast Intake Dr J's Patriot Plus Intake As Cast Exh Dr J's Patriot Plus Exh
Cfm Gains Cfm Gains
.100 70 cfm 74 cfm + 4 cfm .100 52 cfm 62 cfm + 10 cfm
.200 132 cfm 137 cfm + 5 cfm .200 94 cfm 115 cfm + 21 cfm
.300 180 cfm 187 cfm + 7 cfm .300 127 cfm 155 cfm + 28 cfm
.400 220 cfm 229 cfm + 9 cfm .400 162 cfm 180 cfm + 18 cfm
.500 244 cfm 259 cfm + 15 cfm .500 178 cfm 190 cfm + 12 cfm
.600 260 cfm 266 cfm + 6 cfm .600 188 cfm 203 cfm + 15 cfm
.700 260 cfm 272 cfm + 11 cfm .700 192 cfm 209 cfm + 17 cfm
Intake Valve as cast 2.05 Exhaust Valve as cast 1.60
Intake Valve Patriot Plus 2.08 Exhaust Valve Patriot Plus 1.625
(exh flow tested with a flow pipe on as cast and Patriot Plus)
*Flow tested at 28 inches
Flow Numbers Dr J's Patriot Plus SBC Competition Porting Package
Patriot Plus Intake Competition Porting Dr J's Patriot Plus Exh
Competition Porting Cfm Gains
Cfm Gains
.100 74 cfm 76 cfm + 2 cfm .100 62 cfm 66 cfm + 4 cfm
.200 137 cfm 140 cfm + 3 cfm .200 115 cfm 117 cfm + 2 cfm
.300 187 cfm 195 cfm + 8 cfm .300 155 cfm 160 cfm + 5 cfm
.400 229 cfm 242 cfm + 13 cfm .400 180 cfm 191 cfm + 11 cfm
.500 259 cfm 269 cfm + 10 cfm .500 190 cfm 210 cfm + 20 cfm
.600 266 cfm 278 cfm + 12 cfm .600 203 cfm 225 cfm + 22 cfm
.700 272 cfm 294 cfm + 22 cfm .700 209 cfm 236 cfm + 27 cfm
Intake Valve Patriot Plus 2.08 Exhaust Valve Patriot Plus 1.625
(exh flow tested with a flow pipe on as cast and Patriot Plus)
*Flow tested at 28 inches
|
