With you on the valve guide issue here R32 Combat! There's no lateral forces involved with bucket valve setup... Most of my experience is on bikes, stuff like GSXR 1186cc - 162bhp @ wheel / BUSA 1420cc T4 garret - 350bhp @ wheel. And bucket valves have been used (even rocker and bucket) in bike engines for over 25years. I know the stress's arent the same as bike valve/components weigh 3 times less but then Skyline motor does not rev out to 14,500RPM but I ran silicon bronze guides relieved to port and never had any probs. Valve giudes are designed by manufacture's to survive 100k miles so there made longer for relibility. Very nice thread you've created!!! And good luck with your build matey.
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Originally Posted by R32 Combat
After examining the valves and seats before and after lapping, the exhausts were in better condition than the inlets and the contact area was larger.
The anti-lag had caused no damage which means we must have set it up well.
As for the guide issue, its not such a problem with a rocker less cam setup like the RB's. Although the cam does slide over the bucket, that can only move up and down. So the only force on the valve is along its stroke.
On the ehaust side, the valves are IIRC sodium filled. If you run a pointed valve guide, the narrowest part must get very hot, which I don't want.
I want the gas to heat as little as possable on the was out, hence flush grinding the guides.
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