ACCEL/HIGHFLOWTPI PRO RAM INCLUDES MANIFOLD, FUEL RAIL, THERMOSTAT HOUSING WITH GASKET, AND UPPER PLENUM WITH GASKETS. COUNTLESS HOURS OF DYNAMOMETER AND FLOW BENCH TESTING WENT INTO OPTIMIZING THE UPPER PLENUM. INTAKE AS CAST FLOWS 270+ CFM AND HAS THE CAPABILITY TO FLOW WELL OVER 320 WITH PORTING. THROTTLE BODY IS IN THE SAME POSITION AS A GM TPI INTAKE, ALL VACUUM FITTINGS IN SAME LOCATION AS TPI, FACTORY LARGE CAP DISTRIBUTOR FITS. HEIGHT OF INTAKE IS ONLY INCREASED .5 OF AN INCH TOTAL HEIGHT IS STILL LESS THAN 9 INCHES. GREAT UPGRADE OVER TUNED PORT INTAKE 100 HORSEPOWER GAINS OVER A STOCK TPI INTAKE 120 AFTER SOME PORTING... TRANSFER OVER FUEL INJECTORS, THROTTLE BODY, AND VACUUM FITTINGS OVER FROM YOUR STOCK TPI INTAKE
The manifold, designed by John Lingenfelter, produces excellent power from 2000 RPM to 7500 RPM, has optimized runners for precise air delivery and correct fuel distribution, and will fit standard production 23 degree small block Chevy cylinder heads, as well as Vortec L31 truck cylinder heads. This system offers all the advantages of electronic fuel injection plus the flow characteristics of a high rise manifold, tuned to enable motors to run up to 7500 RPM’s.
RPM Stock TPI HP ProRam HP Diff
3400 188 177 -11
3600 199 189 -10
3800 207 201 -6
4000 211 214 +3
4200 212 224 +12
4400 214 234 +20
4600 216 249 +33
4800 212 260 +48
5000 195 263 +68
5100 182 264 +82
5200 173 269 +96
