Fuel injectors and E85
Fuel injectors and E85 Looking for some guidance on a good size injector for E85 and pump gas, I do my own tuning via hptuners. Right now im at ~75% injector duty cycle on pump gas with 36lb injectors with stock fuel pump. I bought a racetronix pump with hotwire and not expecting duty cycle to drop too much. If I do the math i have found for injectors and E85 I come up with ~52lb injectors. Now The problem is I dont think theres any injector data for fast 50 so I was thinking probably siemens 60's, but im worried about the duty cycle being too low on pump gas ( my calculations come to ~22%) Any help would be great as E85 is still trial and error so no real hard evidence yet, the car is a NA C5 corvette with bolt ons + cam.
I wanted a little room to grow and the 42's won't really allow that. Is it possible to run too low of an injector duty cycle if I went with the 60's? Or am I stuck with something in the 50's?
If you acquire any problems, just add some go fast mods to make the engine want more fuel.
On The Tree
Joined: Mar 2010
Posts: 114
Likes: 0
From: Florida
You can run the 60's. People run 120's and drive it on the street. With the right tuning, anything is possible really. Talk to one of the sponsors on here who sell injectors, they can point you to a set that will fit the bill for what you need.
If you acquire any problems, just add some go fast mods to make the engine want more fuel.
If you acquire any problems, just add some go fast mods to make the engine want more fuel.
TECH Fanatic
Joined: Oct 2011
Posts: 1,425
Likes: 0
I had a 496 big block on E85 and ran a single A1000 pump. I now have the set up in my sig. Yet I have to run 2 A1000's. I also run 160lb injectors. They are low impedence and no driver box. Now everyone will tell you that you need a driver box with low impedence but I just wired resistors in line with each injector and we have no problem with idling.
IMO If you are not running a turbo or any type of forced induction you don't need anything that big, however, I dont think I would run less than a 60lb injector with E85 even NA.
IMO If you are not running a turbo or any type of forced induction you don't need anything that big, however, I dont think I would run less than a 60lb injector with E85 even NA.
