SB Chevy 415/421 Competition Race Engine

CNC-Motorsports High performance engine's will take the guess work out of what combinations work to build serious power saving you money and headaches.

We start with Genuine Dart Blocks. All deck surfaces are square decked using the BHJ blok true fixture, this allows us to equally machine the left and right side deck heights parallel to the crank centerline. Cylinder bores are bored using the BHJ bore true fixture. this relocates the cylinder bore centerline to be exactly centered over the crank centerline. All blocks are line honed to our spec. Cylinders are honed with torque plates. All rotating assembly parts are balanced within +/- 1 grams. Engine is fully assembled, blue printed, and fully machined in house by cnc-motorsports, we spare no cost for quality.

Includes the following

* New Dart Little M block
* New Callies Compstar 3.875 foged steel crankshaft
* New Callies Compstar 6" forged steel connecting rods
* New JE forged pistons (12.0:1 - 14.5:1 Compression )
* New ACL / Clevite 77 performance rod and main bearings
* New Durabond cam bearings
* New Melling race high volume oil pump
* New Victor Reinz performance gasket's
* New Tru roller timing chain with torington bearing, lock plate and cam button
* New CNC custom ground solid roller camshaft ( we will design to meet customers needs )
* New Comp cams pushrods
* New T&D or Crower shaft rocker arms
* New Air flow research aluminum cylinder heads (227 or 235)
* New CNC Custom valve covers
* New Kevko 7qt quart drag race oil pan
* New CNC single plane intake manifold
* New TCI / ATI SFI race balancer
* Professional assembled and machined inhouse by CNC-Motorsports, we spare no cost for quality.
* Price includes engine break in on our in house DTS engine dyno
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* All engines are custom built to the customers needs. Bob weight card, blue print sheets ,and dyno sheets will be given to the customer.



We can custom build and engine to meet any racing needs

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Item Location: BROOKINGS, SD Get Directions To This City

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