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Rb26 Throws Shims Out..

DannyzGTR
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DannyzGTR Community Regular

DannyzGTR

Posted
Posted

I have supertech double valve springs, retains, valves,etc car make

Very power but when i bang the limter Bout 8.5k for more than 2 seconds she throws a shims only

On the exhuast side. And a different one everytime... I was told valve float.. Anyone Had that problem?

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https://www.sau.com.au/forums/topic/445201-rb26-throws-shims-out/
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GTRPSI Mentor

GTRPSI

Posted
Posted

What lift and base circle cams?

Have you got the thicker buckets or just thicker shims?

Shouldnt have valve float with double springs....but if you dint use the thicker buckets with a smaller base circle cam, theres your first problem, it will spit out shims.

MJTru Mentor

MJTru

Posted
Posted

What lift and base circle cams?

Have you got the thicker buckets or just thicker shims?

Shouldnt have valve float with double springs....but if you dint use the thicker buckets with a smaller base circle cam, theres your first problem, it will spit out shims.

I dont quite understand your expansion. Why does it happen in the first place. And why not on a stock stock setup. I thought once shimmed with the right gaps it would be ok.
MJTru Mentor

MJTru

Posted
Posted

Somthing is wrong. Bouncing it off the limiter or not. I ant know about that lash. If I remember correctly the intake should be .015 and the exhaust should be .017 plus or minus .001 I ant know about the .28mm but seems small. This is bugging me. Let me call a buddy of mine and see what he is saying. Can you list the links to the parts your running, springs retainers cams and so forth. :huh:

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