Outlaw ProMod drag racing setups with mechanical fuel injection are hitting over 4,000 horsepower. The oversize PSI screw blowers at high overdrive ratios are common. These are not legal in most national drag racing classes. But in eighth mile outlaw racing, they are common. Horsepower levels in the 3,000’s are typical on the launch with […]
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 […]
Pro-Calcs, our on-line MFI jetting calculator, was upgraded: 1. nitro methanol fuel mixtures; Pro-Calcs will determine jetting for nitro additions to meth’l from 0 to 100%; by volume or weight; also procedures for E85 and for gas. 2. correction to data conflicts from various jetting combinations 3. jetting printouts in CVS format to down-load into […]
Regarding Fuel Injector Improvements for Normally Aspirated Stacker Engines We were recently asked about fuel injection nozzle design. It got me thinking about several responses throughout our technical manuals and other racing experiences.
Quick news summary with different fuels: NA (normally aspirated):
E85 is examined as a racing fuel. E85 is a combination of ethanol and low octane gasoline. Some racers report more power from E85 than from methanol. On the other hand, when the Indy Car League converted from methanol to straight ethanol, dynamometer tests revealed a reduction in power after the conversion.
The determination of nozzles & jetting in a new fuel injection setup can be a challenge.
In our drag racing, we did use air to fuel ratio as a controlled value to get the engine into a linear range. That task is an extensive explanation through out writings. The linear range is where the engine is completely predictable. We achieved that very well in our racing.
Below is an email correspondence I had with Jimmy: Hi Bob, I talked to you last week through email about doing a MFI Enderle Birdcatcher on gas on the street … I will use your book to set up and tune my system. But i have a question that may not be covered in your […]