I am running stock bottom end LT4 with +38% fuel lobe cam together with Maggie 2650 on top. My pulleys are stock (90mm) upper and 15% lower. In addition to that I have all the supportive mods: 103mm TB, Rotofab Big Gulp CAI and DSX aux pump.
Currently, my car is tuned for 93 octane, but I would like to add some E (probably E50-60, not going to run full E85) to get some cooling and more power.
As I understand, in order to do this I have 3 ways:
- Methanol injection
- Port injection
- More productive injectors & HPFP
My goal is to keep the build as simple and clean as possible, so I lean towards the
injectors plus HPFP combo.
I do understand that in terms of budget it isn't the most wise and efficient choice, but I have to consider the installation complexity as well, since in my country we don't have so much experience and expertise with these engines.
Taking all above mentioned into account I would like to ask you guys to educate me a bit regarding the injectors and HPFP variety. From what I currently see there are a few options for injectors and HPFP:
Injectors- FIC GDI LT1/LT4 High Flow +30%
- XDI LT4 +30%
- XDI LT4 +50%
- XDI LT4 +70%
HPFP- LPE Big Bore
- Katech Goliath (currently in development)
I've made some investigation and discovered that there are different variations of combos available, for example - FIC +30% with LPE Big Bore, XDI + 70% with LPE Big Bore etc.
Which combo from the above list would be the best? What are your suggestions? Would any of the above-mentioned combos handle E50-60 for my build spec?