Rb26 Throws Shims Out..

[DannyzGTR]

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?

[GTRPSI]

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]

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.

[r33_racer]

What lash is the exhaust set at? Maybe its too loose??

[DannyzGTR]

Yea i do have smaller diameter cams wit bigger shims... But i been told

Doesnt really matter as the spring should be pushing bak up .... I have 82lb on the seat. And clearance is

.28mm.

[Ben C34]

Was told it doesn't matter but your experience and GTRPSI says it does matter.

[blind_elk]

"Doctor, it hurts when I do this".

Then don't keep bouncing it off the f$%^&ng limiter!

[MJTru]

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.

[DannyzGTR]

Supertech; valves, guides, retains, springs, collets,

Tomei pro cams

And stand lifterS.

[DannyzGTR]

Also i limiter bashed 2nd accidently and i seriously thought i pop

A shim of place but it didnt...

My limiter is just a soft cut. No hard cut...

[doo doo]

As gtrpsi has mentioned you need to run the tomei buckets which have an extra 1mm thickness to compensate for the 2mm smaller base circle in the cam, then run the right size shim