Quote:
Originally Posted by flatheadmurre
This i agree with fully !
And valve rotators has nothing to do with lifter rotation, they promote uniform heat, wear and deflection of the valve and helps keep the seat clean from deposits.
So not a bad idee to use them in my book.
The weight difference between rotators and non rotators are 3g so more to be gained from hollow lifters for weight.
And that they should break....they are used with the same design on heavy diesels with lotīs of more springpressure then any race flathead ever is going to see.
Then when it comes to mixing parts...lotīs of ways of doing it...not only one way that is correct.
Most of the time personal taste is what descides....
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I think the way this motor WAS set up, it probably would have run pretty good. The valve clearances were all a little off, but the rotator retainers held the spring at a 1.950"-ish height yielding something like 55 lbs on the seat, and the flat bottom lifters wouldn't have likely caused any issue. Now I'be got a much stouter setup, and everything is very well sorted, but I've spent another $500 and I have no idea if it was worth it. Glad for the knowledge though, and I'm already planning my next flathead build.