Archives: Tips and Tricks

Tips and tricks from Bob.

Launching the Valve for More HP

Crane Cams, Daytona Beach, Florida, had an impressive display at the SEMA show. Chase Knight, valve train product manager, provided some interesting information about their racing cam shaft developments using the Spintron valve train testing machine. A development from special camshaft lift curves and testing is launching the cam lifter off the cam lobe at […]

Surfers ’60s Top Fuel Dragster

Over a short but significant period in US Top Fuel drag racing history, the Surfers Team set record level performance. The Surfers Team was made up of owners/builders/tuners, Bob Skinner & Tom Jobe with driver/crew member, Mike Sorokin. Their nitro Chrysler (early) Hemi dragster quickly became one the sport’s best performers. Highlights of their setup […]

Fuel Injection Fuel Splits in Front Mounted Superchargers of the 1950’s

Recently, I read a couple Hot Rod magazines from the 1950’s. In 1958, my favorite (mechanical fuel injection) propelled several Bonneville racers over 200 MPH. One went around 290 MPH. Those racer builders were the performance leaders of the time with amazing achievements!   Front mounted superchargers were common. Fuel splits of around 15 to […]

Safety: Wheel Lug Nuts

I heard a gripping story that is appropriate to pass on.  Rear lug nuts on a bracket drag racecar were left loose by oversight.  On a 120 MPH pass, the driver hit the brakes.  That loaded the rear brake drum to slow down the wheel speed.  The brake drums sheared off the wheel studs.  A […]

Driver relaxation, nitro launch, safety, and spark plug plating

Relaxation Breathing routines are taught in yoga and relaxation training. They are recommended for a new driver who may be nervous in the early stages of getting licensed to drive a fast racer. One breathing routine is to exhale for a longer time period than the time for inhaling. For example, inhale for a count […]

Hilborn Nozzle Size List

Both our ProCalc calculator and our publications illustrate nozzle sizes in diameter.  Hilborn FI nozzles are stamped in flow numbers.  A list is provided showing: Hilborn nozzle flow numbers (times 0.01 equals flow in GPM) approximate nozzle diameter in inches (from Don Enriquez, Hilborn) pressure calibration value called volume area factor or VA factor that […]