Reinforced valve spring kit Honda H22A
Reinforced valve spring kits for the Honda H22A engine.
- Brand: SUPERTECH
- Engines: H22A (Prelude IV and V)
- Springs: double
- Contents: springs, upper retainers, original lower spring seats kept
The Honda H22A engine covered
The H22A is Honda's 2.2 litre four-cylinder, with twin overhead cams, 16 valves and VTEC timing. It drives the Prelude IV from 1993 to 1997, then the Prelude V from 1996 to 2001.
The original springs are double. The kit replaces the springs and the upper retainers, and keeps the stock lower spring seats.
SUPERTECH reinforced valve spring kit
Each time the cam lets the valve go, the spring decides how fast it settles back. A VTEC that revs high works it relentlessly: if the spring is undersized the valve bounces off its seat. Closing late, it meets the piston, which is what valve float means.
Both kits hold 351 N and 414 N on the seat, at 35.5 mm.
Valve spring kit technical specification
| Part number | Brand | Springs | Outer / inner Ø | Seat pressure | Open pressure | Rate | Max lift | Kit contents |
|---|---|---|---|---|---|---|---|---|
| SPRK-H1000D | SUPERTECH | Double 79 lbs | Outer 29.7 / 21.9 mm Inner 20.5 / 15.5 mm |
351 N at 35.5 mm | 51.2 N/mm | 14.8 mm | Double springs, titanium upper retainers, original lower spring seats kept | |
| SPRK-H1005D | SUPERTECH | Double 93 lbs | Outer 29.7 / 21.9 mm Inner 20.5 / 15.5 mm |
414 N at 35.5 mm | 1063 N at 12.5 mm | 51.2 N/mm | 14.8 mm | Double springs, titanium upper retainers, original lower spring seats kept |
Valve spring kit fitting details
| Part | Honda original | Reinforced spring kit |
|---|---|---|
| Spring | Kit specific: SPR-H1000D or SPR-H1005D | |
| Retainer | 14765-P13-000 / 14765-PCB-003 | Kit specific: RET-K20A2/T2 titanium |
| Spring seat | 14775-P13-000 | Original retained |
| Collets | 14781-PR7-A01 | KPR-5.5-7A-ST-32 |
Each kit pairs SPR-H1000D or SPR-H1005D double springs with RET-K20A2/T2 titanium upper retainers. The original lower spring seats are kept.
Installed height is the distance left between the two retainers when the valve is shut: 35.5 mm for both kits, the height at which the 351 N and 414 N loads apply. A skimmed head or ground seats increase it; the load then drops, for every millimetre taken, by the spring rate in newtons. The values are all listed in the table that follows.
| SUPERTECH | |
|---|---|
| Installed height | 35.5 mm |
| Seat pressure at this height | 351 N (SPRK-H1000D) 414 N (SPRK-H1005D) |
Technical guide
Our brands
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SUPERTECH makes valvetrain parts for competition in California, with three decades of experience. Every spring batch goes through X-ray, ultrasound and laser measurement before dispatch. Valves, guides and retainers also complete its overall range of products. |
How to choose
The right spring holds the valve tight against the cam up to the target speed, without overloading the valvetrain. With 351 N and 414 N on the seat, these two kits suit a built H22A: livelier cams, a moved limiter, a turbo or supercharger. The stiffest is not always best: excess load wears cams and rocker arms faster, so look closely before choosing. That is why these kits target engines pushed well beyond stock.
| Criterion | Key point |
|---|---|
| Choosing the pressure | Each kit name carries a lbs number, the force on the seat in pounds: 79 for the first, 93 for the second, i.e. 351 and 414 N. Weigh this level against your cam lift, which must stay under 14.8 mm, the revs you are after and any boost pressure, without aiming higher than needed. Each value is repeated in the table above. |
| Kit contents | In each kit, SPR-H1000D or SPR-H1005D double springs work with RET-K20A2/T2 titanium upper retainers, while the stock lower spring seats stay in place. Nothing else differs between the two kits than spring rate and load. |
When reinforced springs become necessary
- Camshafts with more lift than standard
- Ignition cut you want to push back
- H22A paired with a turbo or supercharger
- Prelude entered in circuit or rally events
- Weakened springs, with unstable valves before the cut
Compatible vehicles
| Model | Engine code | Power | Years |
|---|---|---|---|
| Honda Prelude IV 2.2 i 16V VTEC (BB1) | H22A2 | 1993-1996 | |
| Honda Prelude IV 2.2 VTi-R (BB1, BB4) | H22A1 | 1994-1997 | |
| Honda Prelude V 2.2 16V (BB6, BB8) | H22A2 / H22A4 / H22A5 / H22A6 / H22A8 | 1996-2001 | |
| Honda Prelude V 2.2 VTi-R (BB6) | H22A4 | 1997-1998 |
Related products
With the head of an H22A off, valves, guides and seats deserve a check as well. The buttons below lead to the inlet and exhaust valves:
| Honda Prelude H22A inlet valves → |
| Honda Prelude H22 exhaust valves → |
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Brand
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ReferenceSPRK-H1000D
