In our AIR SCOOP SIZE article from “Freebies” on our web site, a vehicle MPH speed (called critical air scoop speed in our methanol book) is introduced. It is the vehicle or vessel speed where the air going into an air scoop matches both the speed of the racer and the air consumption of the […]
Our books tell how to make a lot of horsepower with fuel injection through precise air-to-fuel-ratio control; done with engine nozzle & jetting setup and tuning. Airdensityonline developed a jetting & air-to-fuel-ratio calculator for web ready devices: cell phone, IPAD, lap top, IPhone, etc.
Use Pro-calc to run your fuel injection jetting prior to a flow bench test, dynamometer test, or race outing.
The determination of nozzles & jetting in a new fuel injection setup can be a challenge.
– free air density forecast for USA racetracks: airdensityonline.com/tracks/ – free air density calculator for anywhere: airdensityonline.com/free-calcs/
Decreased percentages of nitro richen the racing engine.
A lot of pit buz that cooler fuel runs better. METHANOL VAPOR ISSUE: We found in our methanol publication development that only methanol vapor burns.
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.