Archives: Reader Correspondence

This section features correspondence between readers and Bob. We hope that others in a similar position will be helped by reading these entries.

Kind words from Jim Kinsler

When we released our latest book, High Horsepower Tuning for Mechanical Fuel Injection, we received a very kind letter from Jim Kinsler of Kinsler Fuel Injection: To: Bob Szabo I have enjoyed reading through your “High Horsepower Tuning for Mechanical Fuel Injection”. Very nicely done! Bob, it is nice to see how thoroughly you do […]


Recently we’ve gotten some positive feedback we wanted to share: “Thank You for the prompt reply and formulas you provided, now onward…….. Just want to tell you how much your books helped me in the tuning area. The reading was technical but interesting and informative. I found myself reading each chapter twice before moving on […]

Dyno Prep’ed 572

Mr. Szabo Just an update on my 572. Went to the dyno and made 968 hp, 833 lbs/ft torque. This is with Ron’s Terminator, a 01/2 twin gear pump, .037 nozzles, and a .102 main jet. Air/fuel ratio was 5.3. I was pleased! The information in your books was very helpful and allowed me to […]

Clearing up ambiguous information

I had an interesting email exchange with a very knowledgabel and astute racer that I thought I would share. I’m happy to see he noticed the differences: I noticed an error in the “Superchargers for IHRA” article… “One way of looking at where all of that power came from is to look at the displacement […]


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 […]