Advanced Hemi 212cc Predator Build

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Jrgunn5150

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How do you combat that? Stiffer springs? Lighter Springs? Dual Spring Things I saw?
Is This same as valve float and can it be controlled by keeping RPMs lowish (6000)

Cam card says 26lb springs. I have 26 lb springs.

Is this what you are asking, or are you asking about a more specific measured number?

Pressure can be adjusted using shims, reliefs, different length valves/pushrods?..... right?


Stiffer springs, as a rule, the cam grinders know what it takes to properly control a valve using their grinds.

Of course sometimes it's just a WAG lol.

The pushrods would only change length to correct valve train geometry, but pressure can be modulated somewhat through shimming.
 

bob58o

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Ok, Lots to do. Off work tomorrow. We'll see what I can get done.

I'll post giant pictures of the whole process!

Starting with this piston...
Would you take it out for further inspection?
Should I try to sand it. (I have practice now!)

Pic to come.
 

Jrgunn5150

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Ok, Lots to do. Off work tomorrow. We'll see what I can get done.

I'll post giant pictures of the whole process!

Starting with this piston...
Would you take it out for further inspection?
Should I try to sand it. (I have practice now!)

Pic to come.

I'd leave that, it looks like something dinged or gouged it while the head was off, not like PTV or anything bad.
 

bob58o

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Can't stop thinking the combustion chamber needs a polish.
Don't want detonation killing my engine.
It's tiny and I got everything I need to do it.

BUT swapping the valves to protect them and the seats may be a pain. It took me forever last time.
 

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bob58o

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I've posted this video once or twice before. I really like it!
Good Stuff!
Port and Polish
https://www.youtube.com/watch?v=iejDWSQEsqI
The whole video series is awesome.

My favorite quote: So poetic.. Makes me cry. lol

"This is where you start asking yourself What Kind of a Can did You Just Open on Your Personal Life? You start getting concerned comments on Social Media wondering if you're OK. Your eyes [get] blurry, your head grows weary, and you ponder the meaning of life. These things are all normal behaviors. You must accept them; embrace them. And realize the punishment you face now at this point of the job will be rewarded with lots of HP if you just suck it up, keep your eyes focused where they should be, and always stay continuously aware of where the chuck on your die grinder is... you can never be too careful... not, at least, when hours of doing the same thing makes these textures and and motions blend together in a mind numbing pounding of your air compressor begging for mercy. This is when you need to relax.
...

[Just don't take pics on your cell phone and go sneaking into the bathroom to look at them. Don't force your friends to look at them. Then you know you have a problem!]":oops::oops::oops:

Last part was taken from memory.
 

bob58o

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Guy at work says exhaust valve is burned and needs grinding and lapping. I thought it was carbon build up. He said it is welded metal in the picture.
 

chancer

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Hey Freerunner bought one of your 420 engines!
He is now selling off 212 parts! New in the bag, only dropped once!
 
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