Products: Düx Big Block

  

The Düx Big Block^TM V-twin street engine was conceived several years ago by Michael Düx (motorcycle parts distributor in Hamburg, Germany).

Düx commissioned Randy Torgeson (Hyperformance) to create and develop the components for the massive bore/short stroke powerplant. Randy applied his many years of experience building enormous fuel and gas racing engines to resolve the design and engineering challenge of the giant ductile iron Big Jugs^TM, CNC billet MegaHeads^TM and the complex valve train geometry and related parts. Preliminary prototype engines were assembled using cast aluminum cases in a 144" version. The final version uses gorgeous Ray Keck CNC billet cases.

The result is a beautiful blend of German inspiration and All-American craftsmanship, ingenuity and simplicity. The power potential of this "oversquare" design is still being explored, but recent dyno testing of a prototype Big Block^TM with a moderate duration cam yielded smooth power and awesome torque. 

156 cubic inches -- 5.1" bore x 3 13/16" stroke
Keck^TM super tall deck CNC billet aluminum cases
9.0" Carrillo connecting rods
Custom output, pinion shaft and crank pin by 
   Jim's Machining^TM 
S&S^TM racing grade flywheels

HYPERFORMANCE Big Jugs^TM 
Massive 5.1" bore
Ductle iron Durabar^®
Machined cooling fins
JE^® Nascar 2618 Alcoa Aluminum barrel faced pistons
.927" tapered tool Steel wrist pins

HYPERFORMANCE Megaheads^TM
(Available for single or dual carburetor applications)
CNC machined 6061 T6 billet aluminum
2.55" titanium intake valves
2.0" titanium exhaust valves
high flow oval intake ports
"D" shaped, raised exhaust ports
Mega^TM intake manifold
1.71:1 Rock n' Roller^TM rocker arms
Mega^TM Rocker Boxes