396ci Holden test results in...
Our original 396ci Holden short block was recently fitted with our latest design 2010 alloy heads. As noted previously these heads received all new ports, LS1 style rocker system and 8mm valves along with an all new design combustion chamber and a 10 degree valve angle.
Existing extractors will bolt straight on along with currently available intake manifolds designed for the conventional VN EFI style heads. Due to port height the intakes require end seal spacers as can be seen in the photo above.
Our test engine was fitted with the same CSBS-665 solid lifter flat tappet camshaft (266 intake/270 exhaust duration @ .050"). The stock 1.7:1 LS1 rocker ratio is employed yeilding .630" net valve lift on both intake and exhaust. Compression ratio is 12:1 and pump fuel is no problem with the redesigned chambers.
Peak power is 651 bhp @ 6750 rpm and 525 ft.lbs torque @ 5500 rpm These figures are "in the room" figures and no test conditions were changed except for the addition of a set of "GONZO'S" Tri-Y extractors. The same new design COME (low rise) single 4 barrel intake
manifold was employed with a 1" open hole spacer although without spacer the difference in power was very marginal.
We still have a number of tests and changes we wish to make to the design relating to water jacket location and other valve train updates before finalising the design. Most importantly we now have the most powerful heads for the racing or street/strip Holden V8 engine enabling the old "plastic" to easily compete with any current engines on the market in power per cubic inch stakes.
In fact with 1.64 hp per ci this engine easily overshadows most others on pump fuel anywhere...normally aspirated of course and even more relevant, with flat tappet and not roller camshaft.
These latest 2010 heads will accept our current design valve covers and we envisage supplying them in bare form for racers who want to do their own but most likely as turn key completely assembled heads with valves, springs, roller rocker setup, valve covers and probably intake manifold. Either our 4 barrel or EFI Twin Throttle Body intake will bolt on with our supplied end seal spacers as part of the conversion kit. Pricing will not be finalised for several months.
Exciting times for the Holden V8 are still here.
Keep in mind of course our traditional 2009 heads are still the best value for money instant power makers on any Holden V8 engine for street/strip use on ALL capacity Holden V8's. Our latest CNC ported versions complete for $4500.00 will make big power numbers at a bargain price.
PACKAGE DEALS CONTINUE...
355ci forged piston balanced stroker kits only...through to July special $2300.00 delivered in Australia.
383ci forged piston balanced stroker kits only...through to July special $2600.00 delivered in Australia.
396ci forged piston balanced stroker kits only...through to July special $3000.00 delivered in Australia.
355ci forged piston stroker kit, "I" beam 4340 steel con rods, nodular cast crank fully balanced, New COME 4 barrel intake...$3000.00
355ci forged piston stroker kit, COME 4 barrel intake, COME 2009 complete alloy heads (2.02" intake), COME alloy rocker covers...$6600.00
383ci forged piston stroker kit, COME 4 barrel intake...$3300.00
383ci forged piston stroker kit, COME 4 barrel intake, COME 2009 complete alloy heads (2.02" intake), COME alloy rocker covers...$6900.00
396ci forged piston stroker kit, COME 4 barrel intake...$3600.00
396ci forged piston stroker kit, COME 4 barrel intake, COME 2009 complete alloy heads (2.02" intake), COME alloy rocker covers... $7200.00
355 forged piston stroker kit and COME Twin Throttle Body intake...$4500.00 delivered anywhere in Australia!
355 forged piston stroker kit and COME 2009 alloy heads complete...$5500.00 delivered anywhere in Australia!
383 forged piston stroker kit and COME Twin Throttle Body intake...$5000.00 delivered anywhere in Australia!
383 forged piston stroker kit and COME 2009 alloy heads complete...$6000.00 delivered anywhere in Australia!
396 forged piston stroker kit and COME Twin Throttle Body intake...$5500.00 delivered anywhere in Australia!
396 forged piston stroker kit and COME 2009 alloy heads complete...$6500.00 delivered anywhere in Australia!
355 forged piston stroker kit, COME Twin Throttle Body intake and complete 2009 ALLOY heads...$7500.00 delivered in Australia!
383 forged piston stroker kit, COME Twin Throttle Body intake and complete 2009 ALLOY heads...$8000.00 delivered in Australia!
396 forged piston stroker kit, COME Twin Throttle Body intake and complete 2009 ALLOY heads...$9000.00 delivered in Australia!
LS1 Stroker kits...383, 408, 416, 420, 427, 440 featuring our 4340 forged steel cranks, Diamond Racing custom forged pistons, "H" beam 4340 steel con rods, new crank reluctor wheel fitted and indexed (24 or 58 tooth) assembly fully balanced internally...all $3600.00 delivered in Australia!
Call today (03)9571-4204 or email come@comeracing.com
Trade or urgent enquiries email workshop@comeracing.com
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