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Reinforced valve spring kit AUDI S2 RS2 3B ABY ADU
Kit of 20 reinforced double valve springs for the Audi 2.2 L 5-cylinder 20V turbo.
- Brand: SUPERTECH
- Engines: 3B, ABY, ADU
- Springs: double
- Contents: springs, upper retainers and lower spring seats
Audi engines covered
This kit suits Audi's 2.2-litre five-cylinder turbo with 20 valves, sold under the codes 3B, ABY and ADU. It fits the Coupé quattro, the 80, 90 and 80 Avant quattro, and the 80 Avant RS2 quattro.
Each valve is closed by a double spring: the outer spring 078 109 623 A (which replaces the former 078 109 623 on the 3B and ABY) and the inner spring 078 109 633 A. They sit on a lower spring seat 056 109 629 A and are held by an upper retainer 027 109 641 and collets.
SUPERTECH reinforced valve spring kit
The spring closes the valve, then keeps it pressed against the cam. As revs climb the valve's inertia grows: a spring that is too weak lets the valve bounce on its seat, even hit the piston.
Valve float is the first limit of a tuned engine. This double-spring kit, with its dedicated retainers, delivers a seat load designed to prevent it.
Valve spring kit technical specifications
| Part number | Brand | Springs | Outer / inner Ø | Seat load | Open load | Rate | Max lift | Kit contents |
|---|---|---|---|---|---|---|---|---|
| SPRK-V2093-4-20S | SUPERTECH | Double 82 lbs | Outer 30.4 / 23.2 mm Inner 21.9 / 16.5 mm |
365 N at 31.7 mm | 996 N at 11.5 mm | 13.0 mm | 20 springs, 20 upper retainers, 20 lower spring seats |
Valve spring kit fitting
| Part | Audi original | Reinforced spring kit |
|---|---|---|
| Spring | 078 109 623 A (outer) and 078 109 633 A (inner), double springs; 078 109 623: former number | Kit specific |
| Upper retainer | 027 109 641 | Kit specific : RET-027 |
| Lower spring seat | 056 109 629 A | Kit specific : SEAT-V2093-16 |
| Valve collets | Original kept |
The SUPERTECH kit SPRK-V2093-4-20S contains 20 double springs, 20 RET-027 upper retainers and 20 SEAT-V2093-16 lower spring seats; the original collets are kept.
Installed height is the gap separating the lower spring seat from the upper retainer when the valve is closed. The manufacturer guarantees its seat load for one height only: if the spring ends up longer, after the valve seats are recut for instance, it pushes less hard, and the loss is greater the stiffer the spring. The loads in the table apply at that height only.
| SUPERTECH | |
|---|---|
| Installed height | 31.7 mm |
| Seat load at this height | 365 N |
Technical guide
Our brands
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Californian manufacturer SUPERTECH has engineered competition valvetrain components in San Jose for more than thirty years. Its springs are coiled from highly pure chrome-silicon-vanadium steel wire, then put through ultrasonic, X-ray and laser inspection before leaving the workshop. |
How to choose
With a reinforced kit the valve follows the cam profile faithfully when the engine climbs through the revs: a higher rev limit, a more aggressive camshaft or an added turbo no longer causes float. One limit applies: camshaft lift must not exceed the 13.0 mm this kit accepts at most.
| Criterion | Key point |
|---|---|
| Choosing the load | The 82 lbs of this SUPERTECH kit is the load at the seat, expressed in pounds: 365 N. Three parameters guide the choice of load: camshaft lift, the revs you are targeting and boost pressure. When one of them rises, the load required rises too, never beyond the kit's lift limit. Avoid overdoing it, though: a spring that is too hard accelerates cam wear and may compress the original hydraulic tappets. To settle on the exact value, write to us before fitting: we will advise you based on your camshaft and how the engine is used. |
| Single or double spring | Double, as here: two springs of different diameters nested one inside the other, sharing the effort and damping each other when they vibrate. |
When reinforced springs become necessary
- Camshaft lifting the valves higher than stock
- Rev ceiling you want to push up
- Turbo fitted or boost raised
- Cylinder head rebuilt for circuit, drift or rally
- Worn springs or float felt at high revs
Vehicle compatibility
| Model | Engine code | Power | Years |
|---|---|---|---|
| Audi Coupé quattro | 3B | ||
| Audi 80 / 90 / Avant quattro | ABY | 1992-1995 | |
| Audi Coupé quattro | ABY | 1992-1996 | |
| Audi 80 Avant RS2 quattro | ADU | 1994 |
OEM part number (valve spring): 078 109 623 A (outer spring) and 078 109 633 A (inner spring) on 3B, ABY and ADU; 078 109 623, former number on 3B and ABY, superseded by 078 109 623 A
Don't forget the valves
With the head open for reinforced springs, it is worth renewing the valves as well, inlet and exhaust. These are the ones for these engines:
| Audi S2 RS2 3B ABY ADU inlet valves → |
| Audi S2 RS2 3B ABY ADU exhaust valves → |
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Brand
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ReferenceSPRK-V2093-4-20S
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