For many classes and national events, both the fuel and often the fuel supplier is specified. In that case, there is no fuel choice. However, for many others such as local bracket racing gasoline setups, that is usually not the case. The selection of gasoline is first dependent on leaded or unleaded. Racecars driven to […]
We found some interesting nitro stats in a recent racing history search. Art Malone was one of the frontrunners in the mid 1960’s in Top Fuel drag racing. Note the following: Engine: Early Model Hemi 398 ci Blower: Roots 6-71 @ 18% OD Fuel injection hat: Hilborn Bugcatcher (4 hole front) Fuel pump: Hilborn 12.5 […]
Jerry Gleason’s fuel injected Big Block drag race boat set the latest (at the time) APBA unblown fuel record at 130 MPH. That was done on 30% nitro (Ref. HRM, April, 1968, p. 107). Keep in mind that was with typical OEM Big Block cylinder heads and block. It was with cam lift and timing, […]
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 […]
EXAMPLE 1: A drag racer recently tried out a moderate percentage of nitro in his normally aspirated fuel inj. Big Block V-8. The drag racecar ET was faster by about 0.6 second. An analysis (from our Fuel Injection book, p. 127) determined an increase of approx. 150 HP at the tire. With Pro-Calcs, the setup […]
Recently we set up procedures using Pro-Calc to determine nozzles & jetting for turbocharged racing engines with mechanical fuel injection. In addition, we set up procedures using Pro-Calc to determine nozzles & jetting for rotary racing engines with mechanical fuel injection. We are currently setting up procedures using Pro-Calc to determine nozzles & jetting for […]
Decreased percentages of nitro richen the racing engine.
We made a full pass. Picked up 3 tenths of a second and about 7 MPH over 9% nitro. It was a rush. The engine is louder. And more radical. We are still making enough engine heat at idle to keep the oil dilution minimal. We are on our 16th pass on the same oil […]
We dropped the AFR to 3.2 The idle went up by 300 RPM over the 9% setup (with no idle adjustments).
With a small increase from 6% to 9% nitro, in preparation we dropped the AFR to from 3.7 to 3.4. As a result, we picked up a tenth of a second and about 4 MPH over 6% nitro.