On order

Reinforced valve spring kits Honda B17A1

Reinforced valve spring kit Honda B17A1

€577.40 (tax incl.)

€721.75 (tax incl.) -20%

Kits of reinforced valve springs for the Honda 1.7 16V B17A1 engine.

Brand: SUPERTECH
Engines: 1.7 16V B17A1, Acura Integra 1.7
Springs: double

SPRK-H1002D

Brand - Type of Springs: SUPERTECH - DOUBLE SPRINGS 70 LBS

On order, 15 to 30 days lead time

ORDER TODAY, WE SHIP IN 5 - 15 DAYS

The Honda engine covered

This kit is meant for the Honda B17A1 engine, a 1.7-litre 16-valve unit fitted to the Acura Integra 1.7 built from 1991 to 1993.

Its reinforced double springs take the place of the standard ones.

Reinforced valve spring kits SUPERTECH

When the lobe has done pushing, the spring seats the valve again and keeps it riding the cam. At high rpm this gets harder: short of load, the valve leaves the profile, bounces and may strike the piston, a fault called valve float.

SPRK-H1002D: 311 N at the seat at 33.5 mm; SPRK-H200DR: 445 N; double springs, titanium retainers.

Valve spring kit technical specification

Part number	Brand	Springs	Outer / inner Ø	Seat pressure	Open pressure	Rate	Max lift	Kit contents
SPRK-H1002D	SUPERTECH	Double 70 lbs	Outer 29.1 / 20.5 mm Inner 21.9 / 15.5 mm	311 N at 33.5 mm		44.5 N/mm	14.0 mm	Springs, titanium upper retainers
SPRK-H200DR	SUPERTECH	Double 100 lbs	Outer 30.2 / 22.2 mm Inner 22.2 / 16.8 mm	445 N at 33.5 mm		54.3 N/mm	13.5 mm	Springs, titanium upper retainers

Valve spring kit fitting details

Part	Honda original	Reinforced spring kit
Spring		Kit specific: SPR-H1002D, SPR-H200DR
Retainer		Kit specific: RET-K20A2/T2, titanium
Spring seat
Collets

Two SUPERTECH kits are offered: the SPRK-H1002D, rated 70 lbs at the seat, and the SPRK-H200DR, rated 100 lbs and built for drag racing only; their upper retainers are titanium.

With the valve shut, installed height runs from the lower spring seat on the head up to the retainer crowning the spring. Seat pressure quoted by the maker holds only at that measurement. If it grows, e.g. after the seats are machined again, pressure drops in line with the rate, newtons lost per millimetre gained (see the technical table).

	SUPERTECH
Installed height	33.5 mm
Seat pressure at this height	311 / 445 N

Technical guide

Our brands

SUPERTECH, based in California, has built competition valvetrain parts for over thirty years. Its springs come from high-purity chromium-silicon-vanadium alloy wire and its retainers from military-spec titanium; ultrasound, radiography and laser scans inspect every run.

How to choose

Fitting a reinforced kit means the valve stays on the cam while revs rise, so a higher rev limit, a livelier camshaft or a turbo no longer brings valve float. Both kits give 311 N or 445 N at the seat at 33.5 mm, as listed in the table above. One ceiling applies: camshaft lift has to stay under the kit's maximum lift, 13.5 to 14.0 mm depending on the model.

Criterion	Key point
Choosing the pressure	70 and 100 lbs describe the seat load in pounds, i.e. 311 and 445 N. Three inputs drive the choice between them: camshaft lift, the revs you aim for and boost pressure. The more of each, the more load you need, short of crossing the kit's lift ceiling. Do not overshoot, though: an overly stiff spring tires the cams early. The SPRK-H200DR suits drag racing exclusively.
Single or double spring	In this range every spring is a nested twin-coil unit: one coil carries part of the load while the other steadies it. A single-coil spring stays closer to the factory fitting; the upper retainers are titanium throughout.