Description:

Do you a want a driveable engine that puts out incredible torque delivered instantaneously at low RPM?  No interest in waiting for turbos to spool, or for the RPMs to get high enough so the nitrous will kick in? Are you looking for a package that fits under a standard hood and does not take a ton of fabrication work?  Want to run Drive-by-Cable? This supercharged 427 cubic inch LS is for you!    

The twin screw 2.9L Whipple is a great product.  It is not a re-branded OEM mass production piece.  The screw design and built-in intercooler provide high boost with a minimum of heat for more power.  Characteristic of most twin screw designs, it has an internal bypass allowing it to cruise under vacuum.  Put the hammer down however, and the bypass slaps shut sending you from minimal torque to up near 1,000 lb-ft in a heart beat.  It is an awesome experience and it explains why this has been our best-seller since it was first introduced.  Watch the video to see why.

We put a lot of effort into parts selection.  Our platform for this build can be either the Dart LS Next SHP block or its Dart aluminum counterpart.  Among other things, it boasts: six bolt head capability, priority main oiling, far stronger bottom end design, thicker deck surface and longer cylinder sleeves.  The 4.125" bore is filled with Diamond pistons mounted on a Callies Compstar fully-counterweighted crank and Callies Compstar Extreme rods.  The crank's 4.00" stroke yields 427 cubic inches. 

Our custom grind COMP hydraulic-roller cam core is made from nickel-chromium-molybdenum steel alloy for an incredibly hard and durable finish.  The cam lobes are also micro polished to achieve the perfect surface finish.  These cams look so good it's a shame they are buried in the center of the engine.

We use All Pro heads because we believe they are the best available castings for both performance and durability. These heads are fully HIPS treated which is a big deal (see videos below). We purchase our All Pros in raw form (porter castings) and finish them on our 5-axis CNC. They are further tuned up by us on our Newen Contour CNC seat and guide machine.  COMP's Max-Lift BSR shaft rocker system provide valve train stability.  Crowning the heads are our custom billet valve covers with coil relocation brackets to combine great looks with superior function.

A Holley Terminator X engine management system directs the show.  It is included in the package with the tune from your dyno session to make installation plug and play.  The Holley unit can also control the available water-meth injection system which will chill the inlet air and improve performance under heavy load. 

OPTIONS

Iron or Aluminum Block: All else being equal, iron is stronger, heavier and less heat conductive than aluminum.  The Dart iron and aluminum blocks both have more than adequate strength for this application. The aluminum block is 100 lbs lighter and is better at heat removal.  The weight reduction can significantly improve handling and braking in applications such as road racing and autocross.

Performance: You're not looking for transportation but for serious competition.  Available upgrades to consider would be a fully counter-weighted Callies Magnum crank and Ultra rods, our custom PTFE coated Diamond pistons, to name a few.

Appearance: The supercharger and matching serpentine system are available in either a black (standard) or optional polished finish.  Talking about the serpentine system, No skimping here either.  The 225 amp alternator will easily handle the electronics typical for modern restomod.  The PS pump can be ordered either with its own reservoir or with a remote reservoir and fittings for hooking up your Hydratech brake boosters.  The serpentine system and valve covers are also available upgraded to a polish finish.  Have a specific color scheme in mind?  We will paint the block and select the ignition wires to match.

Oiling: A Holley retrofit oil pan comes standard with this engine. That may not be what   you need. We will work with you to select the oil pan right for your vehicle so it leaves our shop drop-in ready for you. A serious upgrade would be to switch from wet to a dry sump oiling system.  The Dailey dry sump sytems we use bring a host of benefits as outlined in this blog.

Transmission: The power of an engine like this puts a transmission to the test.  Unfortunately, many will come up short.  For that reason, we have worked with top transmission suppliers (Hughes Performance for automatics and Tremec for manuals) so that we can offer pairings that work.  We designed this engine to be a cruiser, and for us that points to over-drive transmissions like our highly-modified Hughes 4L80e or Tremec T-56 six speed.  If you can keep your right foot in check and don’t go crazy on the gear ratio in the rear, you can pass everything on the road including the gas stations. 

If you go with the 4L80e, an upgrade to the Holley Terminator X-Max will control both the engine and transmission.  This is a neat seamless package compared to having a separate trans controller.  

Gauges: One nice final touch is the Holley Digital Dash in 7" or 12" screen sizes.  Worried about getting all the gauges wired up and working in your dash?  Forget it.  All the information you need or want to know is the Digital Dash which it can display through a variety of customizable screens.

Advanced Engine Management: Marine and other advanced racing applications should be upgraded to either our FuelTech or Emtron ECUs, instrumentation and wiring harnesses.

Call us today at 815-725-2727 to get all your questions answered and move on to the driving experience you've always wanted.