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Oem Valve Spring Measurements

e30h26

By e30h26,
in Engines & Forced Induction

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e30h26 Contributor

e30h26

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I'm looking to confirm the coil bind and standard installed heights of OEM RB26 valve springs and OEM RB25DE valve springs.

From what I have been able to measure myself; RB26 coil bind height is somewhere between 26-27mm, installed height I have as 35mm. But this doesn't make sense if the standard cams have an 8.58mm lift. I'd expect a safety clearance of 1.5mm anyway.

RB25de coil bind height is about 24mm and installed height is 35mm again. The standard cams have a 7.8mm lift which gives plenty of safety margin.

Can anyone help to confirm the measurements please?

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https://www.sau.com.au/forums/topic/453938-oem-valve-spring-measurements/
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