QUESTION: Do any of your books help in areas of tuning with using O2 sensors? I am needing some what of a baseline for a good tuneup using the correct nozzles, pills to help with getting the most or should I say most consistent in drag race ET’s. Of course everything being the same. Thanks […]
Congrats to Scott Williamson for great result reported as follows: “… I raced last weekend at the Jegs Cajun Sports Nationals
Message: in your fuel injection book, you show a vacuum gauge with a telltale, do you know where to obtain one of these gauges? KS It is not a vacuum gage but a pressure gauge. You probably want a 0-200 psi, liquid filled, tattle tale gage.
Question: Effect of lowering blower overdrive?? More or less power? Bob?s answer: A trend now is gearing the blower to the racetrack. That is done with rear end gearing, tire size, shift point, and blower overdrive. Adjustment of any of those will change the speed attained by the blower at the end of the drag […]
Question: Fuel injection adjustment with launch controls for a torque converter racecar Answer: When a mechanical fuel injection throttle is part open, such as in preparation for launching from the starting line using throttle control setups, the air to fuel ratio is dependent on that throttle position at the time just before the launch.
Question: Can we put an 8-71 blower on a high output, normally aspirated Big Block V-8 with very high compression ratio (15 to 1)? Answer: The detonation can be controlled with enrichment and air to fuel ratio control, theoretically regardless of the compression ratio. However, I am not sure about the mechanical strength of the […]
Question: How did you dial in your mechanical fuel injection setup for bracket racing? Answer: Our tune-up is set up to be in a linear range. That is when we increase the shift point, our ET is proportionately lower. When we lower our shift point, our ET is proportionately higher. That is a result of […]
Question: We want to race with a Roots blower. There are standard Roots blower bottom openings, and there are smaller ones. Some with a small pie shape towards the front. What is the influence from the size of blower output opening
In addition to the math in the FI book, a lot of text and editorial are provided about fuel injection. However, the correspondence that follows is from a ‘Fuel Injection Book’ customer. It is a demonstration of the extent that a tuner can get into from the FI book math section.
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 […]