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[HILLSIDECYCLE.COM]

No reason not to.
Scott

[Enigmatic]

I went through this with my dealer earlier this year. this video was probably made with my head because they had so many issues putting cams in that they ended up sending heads to T-Man to verify nothing was wrong with them.

hope this helps
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"><a href="

">[/url]<p>Check out this short video on the valve spring travel for a stock CVO 110&quot; and CVO Watercooled head.</p>Posted by T-MAN PERFORMANCE on Thursday, June 18, 2015</div></div>

clearly i don't know how to imbed video! lol but the video is from T-Man Performance on the amount of travel available with stock valve springs. it's available on his fb page
https://www.facebook.com/100157792180/videos/vb.100157792180/10152823764087181/?type=2&theater

[HD Street Performance]

Begs the question how coil bind exceeds the seal to collar distance unless they tested with the seal out.
Bottom line the stock springs are very safe at .625" lift. I still prefer Beehives because they offer equal valve control with less pressure over the nose.

[Enigmatic]

That's what T-Man told me as well. Beehives would do just well without the excess seat pressure of stock springs.  I just chose to leave them in for the meantime.


Sent from my iPad using Tapatalk

[HD Street Performance]

The beehives have a higher seat pressure than stock. I compared stock on unaltered heads stock springs vs AV&V 6500s beehives. 155# vs 178#. At mid lift the stock spring pressure begins to exceed the beevive. The beehives spring rate is less.

[GMR-PERFORMANCE]

The beehives have a higher seat pressure than stock. I compared stock on unaltered heads stock springs vs AV&V 6500s beehives. 155# vs 178#. At mid lift the stock spring pressure begins to exceed the beevive. The beehives spring rate is less.

We have measured them as well Don, good info    I stated the 600 spring pack earlier in this post , it will still go over the 600 lift number  ( with ease) and have less seat pressure than the 650...

[47knuckle10cvo]

I had 263e cams installed in my 2010 Street Glide CVO 110" at a local dealer. Loved to power above 3k rpm. Having built enough engines to know better I questioned the installed spring height when they were installed and was given the "they are bolt on for the SE 110" answer. I ride hard and used all the cam (RPM). After about 2500 miles past the install I broke a valve spring. I suspect the average Harley shop doesn't have a clue as to the proper installed spring and spring height shimming process. It's pretty a simple concept to understand and not all about seat pressure, all though that is important. More lift compresses the spring more, if compressed beyond spring design the coils will touch. With a little float and coil bind bad things can (WILL) happen. Proper springs alone won't do it. As GMR-PERFORMANCE stated below every cam an spring combo has an optimal installed spring height (pack). This assures proper seat pressure and assures no spring bind. Ask questions and if necessary educate your builder if you are going high lift. All reputable Cam and Valve Spring providers will have the required installed height data.