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Thank you, Larry.
I will get face right. play with it with some old valves.

tybolt99 wrote: Thank you, Larry.
I will get face right. play with it with some old valves.

Take as little as you need to get a straight, clean face. Watch you don't get the margin knife edged.

Thanks, I will. Without knowing, I probably would have it edged.

This is what I use to setup installed heights. The short block is 1.475". Use that for a quick reference with vernier calipers for plus / minus.

The dial indicator is for fine tuning to get things exactly where you want them.

I have one of this.



The dial indicator set up is nice.

2 more I use regularly that might help you at some point.

Valve measuring & trimmed calipers to measure port short side height.'

Okay, I've been watching this and now I got a question. When your sinking the valves to get clearence for big cams. Which valve do you sink the most?
Not picking your brain to do it, just to understand it and why.

Les

les holt wrote: Okay, I've been watching this and now I got a question. When your sinking the valves to get clearence for big cams. Which valve do you sink the most?
Not picking your brain to do it, just to understand it and why.

Les

You have to take all the parts into consideration.

Depends on the cams, the thickness of the buckets, the retainer cup depth and the valves Les.

with over size valves, both sides get sunk. Sometimes a lot. Especially if the cams have a ton of TDC overlap lift.

On moderate cams, say K410, it's not as tight using say a 38mm GPz 11 or Suzuki GS1000 intake valve as it would be with an old 3X Andrews or PSP3x.

Always use a small base circle cam with larger valves. I like J, GPz and Suzuki GS Intake valves because they are shorter by about .050"

Reason I asked is from my past experience sinking the valves can kill flow. The exhaust doesn't seem to hurt performance as much as the intake and wondered about sinking the exhaust the most.

Les

les holt wrote: Reason I asked is from my past experience sinking the valves can kill flow. The exhaust doesn't seem to hurt performance as much as the intake and wondered about sinking the exhaust the most.

Les

Sure it can happen. But the old saying "never sink a valve" has to be taken with a grain of salt because it's not a blanket statement that covers every situation. Not all motors respond the same with the same intake vs exhaust flow ration either. There are so many overlapping events going on inside a running cylinder that at any given point in the cycle, something is out of phase from optimum.

Kinda figured it was a give and take or more like a beg, borrow, steal situation. I understand the compromise. Thanks for the info.

Les