Product Description
Supertech 1.8 Valve Spring Kit with Titanium Retainers
94-05 Miata 1.8 91-96 Ford Escort GT 1.8 323, 323GT 323GTX 323GTR Familia
The below are estimates only and will vary greatly depending on valve weight, cam lift, and other variables.
Single spring – seat pressure 56lbs @ 34.2mm
Sustained revs to 7400rpm, mechanical over rev to 7800. N/A only
Light double spring – seat pressure 63lbs @ 34.2mm
Sustained revs to 7800rpm, mechanical over rev to 8200. < 8psi boost
Heavy double spring – seat pressure 74lbs @ 34.2mm
Sustained revs to 8500pm, mechanical over rev to 9000. > 8psi boost
Kit includes
- 16 or 32 springs
- 16 Titanium retainers RET-TS60/MA2
- 16 spring seats, steel SEAT-TS/MA18I
If installing in a BP05 head 94-97 Miata, you’ll also need 32 OEM 99-05 retainers, Mazda # FS01-12-114