With both flat top and dish pistons available, this short block can be used for naturally aspirated or turbo builds with light to moderate boost up to 1,200 crank horsepower. For higher power requirements, please refer to our Racing Junk ad 182683489 with upgraded block, crank and rods.
The Dart SHP LS Next is fully skirted and adds the convenience of directly bolting on GM covers and accessories without requiring oil spacer rails and remote oil filter adapters.
SHP Features
- Full side skirts to accommodate OE oil pans
- Accepts LS style Oil filters
- Retains all factory bolt hole locations
LS Next Features
Retains all of the LS Next designs features not found in competing blocks including but not limited to:
- Longer cylinder sleeves,
- Priority main oiling
- 4 bolt splayed main saddle structural
This 427 cubic inch short block has a 4.125 in bore and 4.00 in stroke. The dimensions are set with Callies Compstar center-counterweighted 4340 forged crank and Ultra H-beam rods.
The center counterweights are a major upgrade as they increase the cranks stiffness by about 25% while reducing harmonics. The net result is less stress on the main bearings and longer engine life. Check out the video to hear more on the subject direct from Callies' Brook Piper. The Callies Compstar Extreme rods can handle a lot of power and provide grear value.
Topping off the rotating assembly are Diamond's Race Series pistons which are machined with their newest and most precise CNCs. Among their features :
- 3D milling on piston crowns for ready to install finish
- Valve pockets designed to work with most aftermarket cylinder heads
- Offset pins for quiet operation
- Moly skirt coating for friction loss and skirt wear protection
- Side gas ports for better ring seal
- 2618 material for High HP-NOS-Boost applications
- A wide range of designs are available (flat top, dish; LS3, LS7).
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Calico-coated Clevite bearings and ARP fasteners are standard.
The skill of the people who finish machine and assemble your short block is just as important as the parts and design and we've got some of the best around. Further, BOROWSKI RACE ENGINES, INC. boasts state-of-the-art CNC machining equipment which empowers our staff to build the best engines available. This was recognized with our being named Race Engine Builder of the Year by Engine Builder Magazine.
Call us at 815-725-2727 to discuss your requirements.