Thread: what fuel injection - 4.3L V8

Thor manifold with wolf ecu ! or for a budget system 3.9 manifold and hotwire system.

is the thor manifold the later model rangie one? alot bigger then the 3.9's.

Originally Posted by def-90

is the thor manifold the later model rangie one? alot bigger then the 3.9's.

Yes it is this unit

The thor manifold gives much better power (upto 60% ) below 3500rpm, at a cost of 5% loss at peak revs.
PhillipA has a excellent dyno chart of the power curve achieved with this manifold on a 3.9L v8, it is orsum, do it

edit: also like to add that the thor manifold is not reccomended for horsepower heros, you WILL get more power from the standard plenum, but not where it is needed

Im suprised the Holley setup can provide enough fuel. Are you sure your injectors/fuel pump are up too the task?

http://www.holley.com/502-20S.asp

Is this the system you are using? Surely 670cfm should support a 4.3ltr motor?

Rochester Quadra-Jet and Edelbrock dual plane manifold with the plane divider cut half down is the way to go. Stone reliable, no electronic problems, & will flow >800cfm.

Originally Posted by Grimace

The thor manifold gives much better power (upto 60% ) below 3500rpm, at a cost of 5% loss at peak revs.
PhillipA has a excellent dyno chart of the power curve achieved with this manifold on a 3.9L v8, it is orsum, do it

edit: also like to add that the thor manifold is not reccomended for horsepower heros, you WILL get more power from the standard plenum, but not where it is needed

Can you use the standard dissy with that (Thor) manifold on, Regards Frank.