Join Date: Oct 2015
Location: Peotone, Illinois
Bronco Info: 1978 Round headlight, 351M,C6, 9", 44/1991, 445 FE, t19, 205, Dana 60/70, MAF, Moet's
I currently am weighing in on going aftermarket pre prepped heads from Edelbrock or going Aussie heads. Either way a 2V port can support far more CFM than I will ever use on my M build. My FE however requires more air and will be port injected to allow more air to be stuffed in the same size port being a denser air charge lacking the extra volume needed for the fuel. Also I will need 1/3 more air to feed the alcohol mixture of E85 so CFM requirements are much higher, I am looking for 325 CFM for the FE. On the M block I am looking for a base line of 275 CFM to keep velocity up for low end. I have a stick behind the FE and a C6 behind the Modified also so that will make a difference also in my power band along with gearing. Basically I am using nearly the same port but taking away the fuel from the incoming air charge for a denser mixture which in the modified won't be critical as demand is much lower and velocity is more critical than volume.