Quote:
Originally Posted by 61-63
Thank you both for the help. The .059/.055 numbers do not take the seals into account just spring height/valve lift/coil bind. I will also take these numbers to my machinist he's been at it 49 years and has built lots of engines, done race heads, etc.
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.050"-.060" from bind is perfectly fine and preferred. Between .050" and .100" is ok. Over .100" and that spring wants to do the chicken dance and things start to get wonky.
Springs always lose pressure after they heat cycle and run, typically up to 20lbs-ish. Setting them up with more when new is always a good idea. As pointed out, retainer to seal clearance is also something you need to check. Hope this helps.