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Reinforced valve spring kits Nissan TB48DE

Reinforced valve spring kit Nissan TB48DE

€306.94 (tax incl.)

€383.68 (tax incl.) -20%

Kits of 24 reinforced valve springs for the Nissan TB48DE of the Patrol.

Brands: SUPERTECH, FERREA
Engine: TB48DE (Patrol GR Y61 4.8)
Springs: single or double
Contents: springs, retainers, spring seats and collets depending on the kit

SPRK-M1007S-TB48

Brand - Type of Springs: SUPERTECH - SPRINGS SINGLE 88 LBS

On order, 15 to 30 days lead time

The Nissan TB48DE six-cylinder of the Patrol

The TB48DE is the 4.8-litre 24-valve straight six of the Nissan Patrol GR Y61, popular in rally raids and off-road builds. It takes 24 springs.

Nissan fits outer spring 13203-VC200, retainer 13209-D4200, spring seat 13205-58S00 and collets 13210-D4200.

SUPERTECH and FERREA reinforced valve spring kits

The spring has to recall each valve at the end of its opening and keep it pressed on the cam until closing. A supercharged TB48 or one with taller cams needs more force; otherwise the valve drifts off the cam, slaps its seat and may go on to strike the piston, with heavy damage.

The SUPERTECH kits range from 245 N (55 lbs) to 454 N (102 lbs) seat pressure, with or without titanium retainers. The FERREA kits quote 325 N (single spring) and 378 N (double spring), with spring seats and collets.

Valve spring kit technical specification

Part number	Brand	Springs	Outer / inner Ø	Seat pressure	Open pressure	Rate	Max lift	Kit contents
SPRK-M1007S-TB48	SUPERTECH	Single 88 lbs	Outer 28.1 / 20.0 mm	391 N at 38.5 mm	854 N at 10 mm	46.7 N/mm	14.5 mm	24 single springs, original retainers and spring seats kept
SPRK-M1005S-TB48	SUPERTECH	Single 78 lbs	Outer 28.0 / 20.0 mm	347 N at 38.5 mm	801 N at 10 mm	45.4 N/mm	15.0 mm	24 single springs, original retainers and spring seats kept
SPRK-H1022S-TB48	SUPERTECH	Single 55 lbs	Outer 30.0 / 21.8 mm	245 N at 39.0 mm	538 N at 10 mm	29.4 N/mm		24 single springs, 24 titanium retainers, 24 spring seats
SPRK-H1021S-TB48	SUPERTECH	Single 77 lbs	Outer 30.0 / 21.8 mm	343 N at 39.0 mm	743 N at 10 mm	40.0 N/mm	17.0 mm	24 single springs, 24 titanium retainers, 24 spring seats
SPRK-H1020-2024	SUPERTECH	Double 102 lbs	Outer 30.0 / 21.8 mm Inner 20.2 / 15.5 mm	454 N at 39.0 mm	983 N at 10 mm	52.9 N/mm	16.0 mm	24 double springs, 24 titanium retainers, 24 spring seats
KT4056	FERREA	Single	Outer 28.0 / 20.8 mm	325 N at 35.9 mm	689 N at 10 mm	36.4 N/mm	12.0 mm	24 springs, 24 retainers, 24 spring seats, 24 collets
KT4055	FERREA	Double	Outer 28.0 / 20.8 mm Inner 20.8 / 16.5 mm	378 N at 36.9 mm	845 N at 10 mm	46.6 N/mm	12.0 mm	24 springs, 24 retainers, 24 spring seats, 24 collets

Valve spring kit fitting details

Part	Nissan original	Reinforced spring kit
Spring	13203-VC200 (outer spring)	Kit specific: SPR-M1005S-TB48, SPR-M1007S, SPR-H1021S, SPR-H1022S, SPR-H1020 + 2024 (SUPERTECH); S10114 or S10133 (FERREA)
Retainer	13209-D4200	Original kept (M1005S, M1007S); kit specific: RET-H60/T1 titanium (SUPERTECH); E11083 or E11109 (FERREA)
Spring seat	13205-58S00	Original kept (M1005S, M1007S); kit specific: SEAT-TB1020D (SUPERTECH); SL1070 (FERREA)
Collets	13210-D4200	Original kept (SUPERTECH); kit specific: K10081 (FERREA)

SPRK-M1005S-TB48 and SPRK-M1007S-TB48 only change the springs: original retainers and spring seats are reused. The other SUPERTECH kits combine springs, RET-H60/T1 titanium retainers and SEAT-TB1020D spring seats. The FERREA kits include springs, E11083 or E11109 retainers, SL1070 spring seats and K10081 collets.

Installed height, taken valve shut, corresponds to how far apart the two spring seats sit. SUPERTECH gives its pressures at 38.5 or 39.0 mm depending on the kit, FERREA at 35.85 and 36.85 mm. Each millimetre gained after seat work takes the equivalent of the rate off the real pressure: a valve-by-valve check remains essential before reassembly.

	SUPERTECH	FERREA
Installed height	SPRK-M1007S-TB48 : 38.5 mm SPRK-M1005S-TB48 : 38.5 mm SPRK-H1022S-TB48 : 39.0 mm SPRK-H1021S-TB48 : 39.0 mm SPRK-H1020-2024 : 39.0 mm	KT4056 : 35.9 mm KT4055 : 36.9 mm
Seat pressure at this height	391 N 347 N 245 N 343 N 454 N	325 N 378 N

Technical guide

Our brands

	Set up in San Jose, SUPERTECH draws on more than three decades of experience to design cylinder head parts for competition engines, from rally raids to the circuit. Chrome-silicon-vanadium is the material of its springs, and every lot is radiographed, ultrasound-tested and laser-gauged.
	Founded in Florida in 1978 by Horacio Ferrea, who came from Argentina as an engine builder, FERREA Racing Components makes its entire valvetrain range in its own workshops, for race engines and for off-road engines that are pushed hard in rally raids.

How to choose

Raising spring load keeps the valve following its lobe as rpm and boost climb: it allows adding a supercharger or a turbo, or fitting taller cams, without valve float. Published pressures for this engine run from 245 to 454 N seat pressure and from 538 to 983 N at 10 mm lift. Never let your camshafts exceed the lift allowed by the chosen part number, from 12.0 to 17.0 mm depending on the kit.

Criterion	Key point
Choosing the pressure	Each SUPERTECH kit is rated by its closed-valve load in pounds: 55 and 77 lbs for the H1022S and H1021S kits with titanium retainers, 78 and 88 lbs for the M1005S and M1007S kits that keep the original retainers, 102 lbs for the double kit. FERREA offers a single kit (325 N) and a double kit (378 N). Choose according to lift, rpm and boost, without oversizing.
Single or double spring	Most kits stay with a single spring, lighter and close to stock. SPRK-H1020-2024 and KT4055 move to a double spring, in which the inner coil relieves the outer one and breaks up its resonances, for the most extreme builds.