New Edelbrock 15-degree SB Chevrolet designs from Mike’s Racing Heads

Mike’s Racing Heads Flow Chart: Performance at 28in of water

Valve Lift (in)

Intake (cfm)

Exhaust (cfm)

0.100

66

56

0.200

142

116

0.300

213

175

0.400

268

232

0.500

326

254

0.600

369

264

0.650

382

267

0.700

395

270

0.800

397

273

Mike’s Racing Heads has developed a new small-block competition cylinder head for Chevrolet drag racing engines.

Derived from the Edelbrock 15-degree Pro-Port head (part number 77549), this head features 300cc intake volume runners and is developed for engine displacements of 400 to 434cu in.

“The size of the engine and rpm range, “explains Mike Androwick, “dictate the sizes of the valves and the runners—not so much the volume of the runner but its cross-sectional area—as well as the port velocities.”

Considering its inline-valve configuration, the peak flow numbers are impressive as the intake tracts generate 397cfm and exhausts 273cfm (see flow chart details below). Inlet and exhaust valve sizes are 2.180in and 1.625in respectively, which seat on a 50-degree angle.

If interested in acquiring these new head designs, which are developed to operate with Jesel shaft-mounted rockers (P/N KPS-10009), simply furnish Mike’s Racing Heads with two new 15-degree Edelbrock castings. Alternatively, have them supply you. In addition, Mike also offers competition manifolds to suit.

For those with the daring and flair to design their own racing heads, you can send your sample to Mike’s Racing Heads, which they will scan, program and, using a 5-axis machining center, complete your own proprietary design for you. People are clever creatures and it’s never too late to begin.

For further information contact Mike’s Racing Heads, 4555 Motorsports Dr. SW, Suite 110, Concord, NC  28027, Telephone (704) 654-6079 or email: Mike@MikesRacingHeads.com. Or visit MikesRacingHeads.com.

Wilwood Disc Brakes introduces new D154 Rear Parking Brake Kit for Chevrolet 12 Bolt

Wilwood Disc Brakes has recently introduced a new D154 rear parking brake kit that features the latest in disc brake technology.  The D154 Pro Series rear disc conversion kit with integral parking brake provides high-tech styling for the street and track.  Experience big brake stopping power from 12.19” diameter rotors and two-piston floating mount calipers for ultimate control with big wheel and tire packages. Application specific engineered kits feature bolt-on installation and full compatibility with the OE master cylinder output. 

Kit part number 140-13025 is applicable to the 12 bolt Chevy rear end with staggered shock mounts.  This kit not only provides better performance, but also the advantages of a parking brake for situations where parking brake functionality is needed.