Stage 5 CONTROLLER KIT
CONTROLLER KIT...
STAGE 5 (Optional) Stroker Kit Converts 390 to 410 and Adds 10 bhp with Milled Heads If you want to stick with your milled 428 heads, you can add 10 bhp @ 5000 rpm by stroking your 390 to 410 cubes. It's done by changing the stock 390 stroke from 3.78" to 3.98" with installation of 428 SUPER COBRA JET CRANKSHAFT C9ZZ-6303-A. Also install 427 CONNECTING ROD C5AZ-6200-D (8 req'd) (NOTE: 0.010" must be ground off each side of journal end of 427 rods to fit in 390 .bore.), 428 FLYWHEEL C9ZZ-6375-B (Manual Trans.) or C9OZ-6375-B (Auto. Trans.), 428 VIBRATION DAMPER C8AZ-6316-C, and VIBRATION DAMPER SPACER (with counter-weight) C9ZZ-6359-A. Install 410 PISTONS C6MY-6108-AB (8 req'd) and RINGS C6AZ-6148-E from the Mercury 410 CID engine, that fit your 390 bore. Dynamically balance the engine. |
| CONTROLLER KIT | |
| Total Incremental HP Increase ......... | 111 |
Now, that wasn't hard was it? A cam, popup pistons and some lower-end tough stuff and you add
111 bhp @ 5500 rpm. But if those torque and horsepower curves still don't look mean enough, move up
to the Dominator Kit to see just how far you call go with a base 390 engine.
DOMINATOR KIT... 119 to 145 Horsepower Increase All those extra horses come from the choice of solid lifter cams, and lightweight valves. Of course, at this performance level we also recommend the 427 connecting rod. And if you didn't install the optional "pop-up" pistons in the Controller Kit, now is the time to do so. Stages 1 and 3 remain unchanged, so lets revisit Stage 2 and Stage 4 again. STAGE 2 (Revisited, One More Time) To Add 56 to 82 Horsepower With Mechanical Cams MECHANICAL CAM C3AZ-6250-AA is a reasonably priced grind that adds 56 bhp @ 5500 rpm over the stock 390 4V. And you can drive it on the street. It's from the stock medium riser 427 mill and features a 0.500" lift and 306° duration. Two more solid lifter cams are optional here. MECHANICAL CAM C4AE-6250-B is an excellent strip cam that will add 66 bhp @ 6000 rpm. Its 0.500" lift and 324° duration make it a marginal street stick. Do not use with power brakes as the vacuum at engine idle is not sufficient to operate brakes satisfactorily. MECHANICAL CAM C8AX-6250-D is strictly a strip and track cam with its 0.600" lift and 330° duration. It will add 82 bhp @ 6500 rpm. If this cam is used, be sure the engine is set up to handle its high rpm potential. Installation of the mechanical cams requires the following valve train modifications on Right Side of this Page. |
VALVE TRAIN MODIFICATIONS ADJUSTABLE ROCKER ARMS B8A-6564-B (16 req'd) with a 1.76 ratio and 427 PUSH RODS B8AZ-6565-C should be installed now, if they weren't put in with the Controller Kit. The 427 push rods must be used, because they have a ball on one end and a socket or cup on the other end into which the adjusting screw seats. Push rods for non-adjustable rocker arms have a ball on both ends. Stock 427 SOLID LIFTER TAPPETS C4AZ-6500-B (16 req'd) must be installed with all mechanical cams. Also install the following 428 CJ pieces: VALVE SPRING and DAMPER ASSY C8AZ-6513-B (16 req'd), KEEPERS B8A-6518-A (32 req'd) and RETAINERS C3AZ-6514-A (16 req'd) with mechanical cams C3AZ-6250-AA and C4AE-6250-B. The C8AX-6250-D requires the following special modifications. |