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Rb25 Supertech Valve Springs & Retainers

r33_racer

By r33_racer,
in Engines & Forced Induction

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r33_racer Grand Master

r33_racer

Posted
Posted

I got a set of Supertech RB25det springs and retainers to suit hydraulic lifters and I just installed them all and found an issue with them.

Im using standard valves and collets and with the kit installed, Ive found that the majority of the valve tips are not protruding above the retainer. Maybe 10 out of the 24 are protruding, though varying heights which isnt too much of a drama as the lifters will take up that. But the rest of them are all flush or below, some quite abit below. One that was particularly bad I fitted the factory steel retainer and the valve tip height jumped back up to where it should be. Some quick measurements show the titanium retainers dont have the same taper in them as the factory items. The taper is slightly larger in diameter so the retainer is sitting higher then what it should when seated around the collet/s.

Has anyone noticed this before? Or am I just unlucky and got an out of spec kit?

r33_racer Grand Master

r33_racer

Posted
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Posted

Try to get some photo's of how far out they are and get in contact with whoever you got them off. Quality control must have been out on a picnic the day they got made.

Yeh I will do that. But I dont have time to send them back and wait for a reply and or new set to be sent out. I can either make new ones myself or just refit the factory ones which seem to fix the issue which is my quickest and easiet option.

In case anyone wants to know, the factory retainer weighs 12.97g and the titanium retainer weighs 8.21g. Thats a good 4.76g saving per retainer and 114.24g saving overall!

  • 4 months later...
dmac_25 Grand Master

dmac_25

Posted
Posted

Hey mate have you had a look at the solid lifters you got off supertech did you get ones to suit the oe hyd retainer very keen to see how supertech decided to hold the shim in with the lifter rather than a rb26 which the retainer houses the shim

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