Ecotec V6 4.2 litre Blower engine
The Ecotec Holden V6 has come a long way. With our development of a full range of performance parts for these engines there are new limits to their capabilities. The engine shown above started as one of our off the shelf outright crate motors to suit boost applications. This engine is sold as a long motor outright for $10,500.00 fully dyno run in, in normally aspirated form ready to receive whichever form of boost setup you prefer, blower or turbo. This particular customer supplied us with a very large (too large) Vortec blower and full kit including intercooler, blow off valve, injectors, fuel pressure regulator, pulleys etc. to complete the blower installation. Unfortunately the regulator was faulty, the lower pulley did not fit the stock balancer and we had to do major fabrications, the top blower pulley was way too small for an engine this size and a new $400.00 version was needed. There were many other small items needing to be done and other pieces fabricated to make this a viable installation. Buyers need to keep these factors in mind when buying a $10,000.00 plus blower kit that is supposed to be a "simple" bolt on. Using the latest Kalmaker Mafless boost software and fitted with our newly developed Twin Throttle Body Ecotec intake manifold plenum this little "midget" engine displacing 256ci (just under 4.3 litres) made 505 BHP @ 5750 rpm and 424 ft.lbs torque @ 4500 rpm Maximum boost at 5750 rpm was 14.5 psi
The size of this blower being clearly too large was evident in boost lag below 3500 rpm. In fact we saw 3-4 psi @ 2750 fully loaded at which point the engine made 291 ft.lbs torque. By 4000 rpm the boost was rushing in at 8-10 psi and 415 ft.lbs was registering. At the peak rpm of 5750 peak torque of 461 ft.lbs hit home. Now considering the size of this little engine, pump fuel being used and VERY, VERY conservative tuning this power/torque is pretty astonishing when one looks at the low rpm range.
We still feel a smaller blower would have worked better to maximise overall results and reduce the lag that most people associate with turbos. Trust me the blowers if too big are no different. Nevertheless considering the results you could easily shove this little monster into a typical VS Commodore with a set of 3.9:1 diff gears, slicks, optimised exhaust system and say a boost friendly torque converter with about 2800 rpm stall speed and easily run high 10 second 1/4 mile times. Then just drive it home and achieve great fuel economy. The latest "self learn" feature of the Kalmaker software optimises the fuel curve almost itself in no boost cruising situations off the normal dual O2 sensor imputs and keeps the engine clean and efficient at part throttle.
Engine specs: COME 4.2 litre stroker crank (nodular iron) 3.700" stroke, custom length "H" beam 4340 steel rods, Wiseco forged 8.2:1 compression forged pistons, fully ported Ecotec cast iron factory cylinder heads which flow over 350 bhp through intake ports, COME CSBR-523 hydraulic roller camshaft, Speed Pro lifters, COME Conical valve springs and chrome moly retainers, single row timing set retaining balance shaft for street smoothness, blueprinted production oil pump, fully prepared block with line honed main tunnels, bored and torque plate honed to +.030" oversize, deck surfaces machined and equalised with "O" ring grooves cut and "O" ring wire fitted, Ridgecrest custom made copper head gaskets fitted. Production rocker arms and pushrods retained. They are very strong pieces and everyone throws them out...how stupid can you be? Use them they are tough pieces. Only the pushrods need replacement if you are going to really "turn" the engine very hard. New COME Twin Throttle Body intake plenum fitted on port matched stock Ecotec intake runner base. Stock PCV breather system eliminated to prevent interraction with boost application. Will need external breather setup via rocker covers to catch can or more elaborate breather system.
NEW PRODUCTS
1) We have just completed our latest billet 4340 steel crankshafts to suit Ecotec V6. They are available in stock 3.400" stroke or our popular stroker version. Either one is on the shelf ready for immediate delivery for $2200.00 each as a special introductory offer. These are the strongest and most accurately machined cranks you will buy anywhere for the Ecotec V6 being used in extreme applications or endurance racing. In addition we've made some matching Ecotec (stock length) "H" beam 4340 steel conrods to go with the stock stroke cranks. These are $990.00 a set or purchased with a crank together both will cost you $3000.00
2) We've also completed a small batch of our billet 4340 steel crankshafts to suit LS1/LS2 Chev V8's. These are counterweighted 4.00" stroke cranks featuring ease of balancing with almost any bobweights and not requiring mallory metal. They have traditional Chev 350 2.1" rod journal diameter and widths and our introductory price is $2500.00 They can also be ordered as part of our complete 383, 408 or 427ci stroker kits including our latest design "H" beam rods and Wiseco custom normally aspirated or boost piston sets. Call for deals on complete kits. There are no other kits on the market as strong or accurately made as these parts.
Latest specials
We are continuing our great deals on most of our products:
1) COME EFI V8 Holden Twin Throttle Body intake manifolds including billet throttle body and intake snorkel for $2500.00 delivered anywhere in Australia. Still the most popular, most effective power maker and best looking EFI intake available anywhere for the Holden EFI V8.
2) COME Holden V8 383ci Stroker kits FULLY BALANCED. Our most popular 9:1 compression kit including our 8 counterweight nodular crank, "I" beam 4340 steel rods and supe strong Keith Black pistons with moly rings, rod and main bearings all for $2750.00 delivered anywhere in Australia. The 10:1 compression kit is a bargain at $3000.00 delivered in Australia...Why would you bother doing a 355? Be really competitive with the LS1 V8 Commodores. We also have a full range of Australia's most popular 355 Stroker kits at bargain prices for those on a budget. The best quality and most accurately machined components in the industry are now even more affordable. Call and ask for our "internet" deals.
3) LS1 408ci short motors, featuring brand new 6.0 litre LS2 blocks, our complete 408ci stroker kit is fitted with forged Wiseco pistons, 4340 steel "I" beam rods and our super strong nodular 4.00" stroke crank. Assembly is fully balanced internally, fitted with your choice out of our COME LS1 camshaft range. The most powerful cams on the market bar none with the added advantage of quiet valvetrain operation and longest possible valvetrain life. This short block is a gift at $8000.00 outright, fully assembled and DELIVERED anywhere in Australia. A 427ci version with brand new LS7 alloy block is only $13,000.00
4) 4.2 Ecotec S.S-3 EFI engine. Your choice of power levels up to a very streetable 235 kw and over 430 nm torque. Supply us your complete Ecotec V6 and we will build this engine top to bottom including our new Twin Throttle Body intake (supplied) for $9900.00 Freight is additional to this price although we have very good freight deals around Australia. Engine comes fully dyno run in and optimised ready to drop in and enjoy. V6 insurance rates with V8 power and torque. These engines are also available as outright long motors without ancillaries. Call for pricing depending on which parts you can or cannot supply to complete the engine.
5) COME Racing alloy 400ci V8 engines outright. Direct replacement for the popular Holden V8 although with 500 bhp and 500 ft.lbs torque. Your early Holden or Commodore will never be the same. Carburettor version $20,000 EFI version $22,500.......BOTH in stock. These are a real crate motor with the finest components installed and dyno optimised ready to go. For these prices it's almost crazy to rebuild an old engine.
We are doing deals on all our engine packages and components, particularly for those buying multiple parts at one time to achieve a certain build up. Call us during business hours 8.30am to 5.30pm Monday-Friday on (03)9571-4204 or email come@comeracing.com Trade or urgent enquiries please to workshop@comeracing.com
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