5.9 Liter GTS 928 Engine Build (High RPM)

     This 5.9L engine build is specifically designed for high rpm use. We modify the Porsche GTS crankshaft by drilling new oil passageways and overbore the cylinder block. Our unique new piston solution uses a 104+ mm bore for larger displacement and a special piston skirt friction coating developed for jet aircraft engines and proven in Mercedes Benz engines of the same cylinder wall alloy as the 928. We also offer a ceramic coating to the piston crowns that limits heat transfer to and thus the expansion of pistons, which combined with the skirt coating allows a very close tolerance fitting of the piston to the cylinder bore for long life, quiet operation, and extended piston ring seal.

     This breakthrough allows us to use custom forged pistons in our 5.4L 928 engines, offering the highest quality and complete design flexibility. Wiseco and Ross are widely regarded as having the most advanced forging construction technology for street/track pistons. We have developed several custom spec ring packages, with materials specially suited to the Alusil cylinder bores and an oil ring package that, in conjunction with the piston design, increases the efficiency of the oil control package. We also have options for different 2-piece compression ring packages to increase combustion sealing and power. All of these modifications take advantage of current, improved engine technologies.

     This is a premium quality engine build with the best components and extreme precision in the machining and blueprinting of the engine. We have developed tooling and machining technologies that produce extremely accurate cylinder bores that will give outstanding ring seal and long life. We offer many options in the specifications of this engine rebuild, please contact us for details for options other than those listed.

Part	Description	Qty.	Part #	Price
Prepared crankshaft	GTS crankshaft modified for improved oiling, clearanced & magnafluxed	1	CS003	$795.00
Rebuilt connecting rods	Porsche rods rebuilt w/new nuts, rod bushings resized, magnafluxed	8	CR010	$299.00
WISECO forged pistons & fitted pins	104 mm custom 928D spec with improved oiling package & ultra low friction aircraft skirt coating, 10.5:1 cr	8	PS003	$1489.00
Piston Rings	104 mm hi tech ring set, improved oil control with WISECO pistons	1	PRS002	$348.00
Main Bearings	Modified to provide improved rod bearing oiling w/drilled crankshaft	Set	EB 001	$349.00
Rod Bearings	Precision matched to crankshaft	Set	EB 002	$99.00
Head gaskets	105 mm oversize steel w/ fire ring	Pair	GS003	$199.00
Engine gaskets	Full set, part credit for head gaskets	1	GS002	$343.00
Supplies	Chemicals, adhesives, etc.			$25.00
Head studs	Aerospace alloy cylinder head studs	Set	EF002	$469.00
Machine	Custom balance rotating assembly	All	MS012	$249.00
Short Block Machine	Machine shop block operations, boring, honing, crack check, cleaning		MS002	$980.00
Level II cylinder heads, complete	Ported, large valve Level II heads are recommended, Level I available	2	CHA-LII	$3659.00
Camshaft set	Level II camshaft set, specs & cost vary with engine application	1	928D-LII -4CS1	$1950.00
Engine build labor	Engine disassemble, clean, inspect. Assembly, rebuild timing belt drive, tensioners, time cams.	28 hrs	L 002	$1960.00
Timing belt	HTD belt	1	TA 001	$41.00
Water Pump	New Porsche	1	TA 002	$195.00
Rbld kit	Timing belt tensioner	1	TA 003	$12.00
Belt roller	Tensioner roller	1	TA 004	$55.00
Bushing	Tensioner arm bushing	1	TA 005	$15.00
Belt roller	Idler roller	1	TA 005	$75.00
Roller bearings	Lower guide roller bearings (2)	Set	TA 006	$40.00
Supplies	Oil, filters, belts, misc			$120.00
Total	Parts & labor total**			$13766.00

Prices are based upon a sound & rebuildable 928 5.4L engine core. Damaged components may require replacement at additional cost. Prices are subject to change.
Additional parts & labor may be required. Owner will be informed for authorization prior to any additional charges.

Part	Description	Qty.	Part #	Price
Machine	Pressure test block, heads	1	MS 007	$165.00
Machine	Deck engine block	1	MS 008	$150.00
Machine	Polish, shot-peen rods	8	MS015	$249.00
Coatings	Ceramic coat piston crowns, comb. chambers & valves, ports, etc			VARIOUS
Machine	Line hone main journals (includes surface machine of block, girdle)	1	MS 009	$560.00
Testing	Dyno test engine assembly, break-in & baseline power, tuning	1	TP 004	$400.00
Testing	Additional dyno testing, FI tuning, cam timing changes, etc.	1	TP 005	$500/day
Appearance	Powder coat cam covers	2	A 001	$140.00