Cast-iron cylinder heads were...
Cast-iron cylinder heads were filled with 2.25-inch intake and 1.94-inch stainless steel valves, Comp Cams springs, retainers and locks, and Indy roller rocker arms. The valvetrain from Comp is centered around a .546-inch lift hydraulic camshaft.
|0-4235||’64–’65 426 Wedge and ’68 426 HEMI “right side” carburetor|
|0-4236||’64–’65 426 Wedge and ’68 426 HEMI “left side” carburetor|
|RHACRIM||Aluminum cross-ram intake|
|CLKH||Complete linkage for Holley carbs|
Indy Cylinder Head
MP BlockMP heads: 2.25-inch intake/1.94-inch exhaustIndy Rocker gear: 1.6 ratio intake/1.55 ratio exhaustFirecore spark plug wiresChampion No. 71 spark plugsMopar electronic distributor
|444037506760||3.75-inch stroke crankshaft|
|CRS6860C3D||ESP H-beam rods|
|24-292-4||Hydraulic, flat-tappet camshaft|
Nothing but the best parts...
Nothing but the best parts were used for this build. For starters, how about a Mopar Performance cast-iron water block, and Milodon street Hemi pan and oiling system. Diamond forged pistons and an Eagle forged crankshaft and H-beam rods form the stout bottom end, and a Comp .546/.529-inch lift and .244/.244-degrees duration hydraulic cam actuates the valves.
To top this engine, nothing...
To top this engine, nothing but multiple carburetion would suffice. Fortunately, A&A Transmissions reproduces a beautiful cross-ram intake manifold and throttle linkage for the 426 Hemi, and gladly offered one for this build. Check them out as they offer the cross-ram intakes for Hemi and Max Wedge engines in aluminum and magnesium.
This Hemi was built with a...
This Hemi was built with a 10.0:1 compression ratio, which ensures this motor will run great on pump fuel. Timing was set to a conservative 35 degrees total advance for the dyno pulls.
After breaking in the camshaft,...
After breaking in the camshaft, Ken made a couple of easy pulls on the engine to break in the rings. He then pulled the handle for three easy pulls to measure the engine's output. At just shy of 6,000 rpm, the Hemi made nearly 550 hp. With its broad power and torque curves, this engine will be at home in a street car or a bracket racer. Man, we wish we could win this thing.
A pair of 770-cfm Holley Super-Stock,...
A pair of 770-cfm Holley Super-Stock, cross-ram carburetors was installed with light secondary springs and brackets and linkage from A&A Transmissions. These are new, nearly-exact reproductions of the originals. While tuning on the dyno, minimal changes to jetting and secondary springs put the air/fuel ratio right on the money.
Engine builder Ken Lazzeri...
Engine builder Ken Lazzeri from Indy Cylinder Head paid special attention to this engine, building and tuning it himself. After some simple idle screw adjustments, the Hemi idled with ease and an impressive lope.
Though Ronnie is not able...
Though Ronnie is not able to be with us, we feel fortunate to contribute to this project in his honor. With all the proceeds going to benefit the children at St. Jude as well as prostate cancer research, we are happy to see that Ronnie, through his wife Diane and his many friends, is still giving back, just like he did his entire life.
Want to win this Hemi? It...
Want to win this Hemi? It will be on display at several Mopar events this season leading up to Saturday at the 2009 Mopar Nationals, and you can either purchase your raffle ticket there or online at ronniesox.com.