I thought Rupert stirctly did Alky Carbs??? I have owned nothing but Rupert carbs and after watching others struggle with their APD, I would hesitate to own it unless it came directly off of Randy's car.
As for injection to a carb, when we took the hat injection off our dragster it went from 7.80's to 7.90's. It was .15-.20 difference. The response and torque off injection is far greater than a single carb.