**Highest lift cam on STOCK springs**
Lift is only one aspect, ramp speeds and cam profile also factor in. It's not just coil bind you're trying to avoid. Valve float at higher rpms is a consideration, as well as bouncing the valve off the seat as it sits back down. I'd pay attention to the mfgr recomendation for springs. Some cams at .590 lift will be fine with stock beehives, others might need stiffer springs.
Road Captain
Joined: Mar 2009
Posts: 689
Likes: 6
From: Glen Rose TX
Bump on this for some updated experience since a lot of people have been pushing the limits of stock valve springs over the last few years and some of the builders have become more comfortable with the stockers limits and durability.
So what cams/lift, how many miles have been racked up and how much time is spent at upper RPM's
So what cams/lift, how many miles have been racked up and how much time is spent at upper RPM's
Supporter
Joined: Jul 2007
Posts: 2,196
Likes: 10
From: Shenandoah, TX
I have Andrews 54H's (555 lift) in my, well was 96". But I also had 103 head reworked and installed. I now have upgraded my 96" to 103 via 103 jugs and pistons with same heads and cams without issue.
Road Captain
Joined: Aug 2011
Posts: 575
Likes: 4
From: SouthWestern Ontario
IMHO, a .575" lift is within the reliability/comfort level for the average rider. My 103 with stock heads and ACRs (installed as factory recall in '07), has had the Redshift 575 cams installed for a little more than 35,000 miles now without any issues. Just another improvement made to wake up this bike from its stock configuration.
Last edited by Recycled; Oct 24, 2015 at 09:03 PM.
Sponsor
Joined: Jul 2015
Posts: 8,538
Likes: 1,646
From: SF Bay area
I'm running the 57H @.560 with stock springs... no issues.... '15 Limited Low
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Stage I
Joined: Jul 2020
Posts: 1
Likes: 0
From: Calgary
my roommate has the 585 s&s in his
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Grand HDF Member
Joined: Sep 2010
Posts: 3,580
Likes: 215
From: Illinois
When I did my previous bike and I went with S&S 585s I redid the heads and beefy up the springs. I say below that you should be ok.
add: I would also recommend getting better lifters too while your at it.
add: I would also recommend getting better lifters too while your at it.
Last edited by HD Bobber; Jul 10, 2020 at 08:07 PM.
