For a little background first. All of my fuel injection exrerience has been learned on the venerable 5.0L Mustang. Mass air and speed density systems, small bore, long runner intakes. Sooooo here it goes, since BBB make a SH!T load of torque, how much more benificial would a custom long runner fuel injected (EFI) manifold be over a converted carb intake??? Possibly a dual plenum/throttle bodies. Ala dodge ram horn intake just not to that extreme. The plenums would be over the valve covers with the TB's facing the front of the car for a nice ram air set up or twin turbos:Brow: ??? Or is the long runner intake just too much added torque for the monster buicks. Remember this is all theory.
Woodie - There's a formula (somewhere) for tuning the intake to the cubic inch and rpm you plan to run. It would take into account the cross sectional area and length - probably plenum size also. You're right though, long runners would provide more lower end torque. For a street engine that generally doesn't need to see the high side of 6000rpm, the longer runners would be appropriate. Of course, in reality, if you converted a Wildcat or SP-1 intake over to Port FI as alot of guys on this board have done, I think you'd be more than happy with the results! Since the 455's make an abundance of torque, maybe it wouldn't be a bad thing to sacrifice a little bottom end torque!?
One thought They already have that 2-piece long runner manifold for the 502 ramjet: Maybe there's some way we could adapt that upper unit to the BBB. o No: - Freed
