Holden VN-VR 4.2 litre Stroker engines and components
The Holden V6 revolution continues with the earlier VN-VR V6 3.8 litre engines now growing to a healthy 4.2 litres.
In addition to the already popular 4.2 litre Ecotec engine strokers for both normally aspirated as well as boost applications, owners of earlier model Holden V6's can now stretch the capacity of any VN Series 11, VP or VR V6 3.8 litre engine to 4.2 litres.
The engine shown here is one of many coming out of our shop with basic upgrades like fully ported S.T-3 cylinder heads, a COME billet Streetmaster Hydraulic Roller cam profile (numerous choices based on vehicle type and real customer end use). The engine is fully rebuilt and fitted with our latest brand new nodular iron 3.700" stroke large counterweight crankshaft, forged 4340 "I" beam con rods with heavy duty capscrew rod bolts and Hypertec alloy pistons.
This fully assembled, dyno run in and optimised engine is $8800.00 if you supply us your complete VN-VR engine for building. Or we can supply the long motors outright with extra cost depending on actual model required. Of course the price includes full assembly, ultrasonically cleaned and flowed injectors, full engine dyno run in and software optimisation with Twin Table Software supplied. You drop the engine back in the car, fit a fully upgraded exhaust, turn the key and drive with no further tuning required.
For the do-it-yourselfers, we offer a full range of fully balanced crank, rod and piston kits. The normally aspirated kit price is $2530.00 including, crank, rods, pistons, rings, rod and main bearings and full balancing of all components.
For boost or full race applications we offer the same super strong crank, "H" beam 4340 forged steel con rods and custom made Wiseco low or high compression forged pistons, rings, rod and main bearings also fully balanced for $4000.00
The same component combinations as our Ecotec ones are also available for the earlier model VN-VR V6's where we can supply fully machined and assembled normally aspirated 4.2 litre Stroker Short motors outright for $4500.00
Blower/Turbo 4.2 short motors outright for $6500.00 which include block deck "O" rings and custom made copper head gaskets.
All our short motors include a COME billet steel roller camshaft (your choice of grind) timing chain and gear set and new Ecotec harmonic balancer. Match either short block with our fully ported S.T-3 cylinder heads for $1995.00 outright or $1750.00 to do yours and you have a fully optimised combination to suit your exact application. No guessing or trial and error. We've done the research and development for you so you simply assemble and drive.
Typical power levels for a totally streetable normally aspirated 4.2 litre VN-VR engine as shown above are over 200kw (270+bhp) and 385nm (285 ft.lbs) torque in a daily driveable engine that still manages much better fuel mileage than a 5 litre Holden V8 but accelerates much quicker. In fact in a typical VN-VR Commodore such an engine will easily run mid to low 14's over the 1/4 miles with stock 3.08:1 diff ratio. Fit some 3.7:1 gears and a small hi stall converter and you have a cheap to build and run 13 second true daily driver.
For those of you with earlier Holdens or other possible transplant cars, 4 wheel drives etc. think of the possibilities of fitting a V6 like this instead of the typical V8 swaps. These engines make more grunt than many of the V8's and are smaller, lighter, more compact and in fact more legal to fit in many parts of Australia.
The Holden V6 revolution has only just begun. In fact, COME Racing is completing development right now of a dedicated Twin Throttle Body intake manifold to fully complement these new Stroker packages and this will extend the horizons of the V6 frontier enormously. Benefiting not only normally aspirated combinations but equally viable and advantageous for the boosted engines.
For further information or answers to questions regarding these or any of our products or services email us at come@comeracing.com or phone us Monday to Friday 8.30am to 5.00pm on (03)9571-4204
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