EVO style lifters for shovelhead...

EVO style lifters for shovelhead...

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Joel_39WLD
Posts: 9
Joined: Wed Sep 28, 2011 9:43 pm
Bikes: 1939 WLD
1974 FLH
2001 XL1200S

EVO style lifters for shovelhead...

#1

Post by Joel_39WLD » Tue May 15, 2018 5:54 pm

I want to install a new set of new EVO style lifters in my shovelhead. Has anyone done this before? Any tips would be greatly appreciated. Any problems I should anticipate? Thanks... Joel



RooDog
Posts: 42
Joined: Tue Oct 31, 2017 1:00 pm
Bikes: 1950 Resto-Mod Panhead, 1968 90", 5 Speed Shovelhead, 1984 Evo
100" Bagger
Location: Knoxville, Tennessee

Re: EVO style lifters for shovelhead...

#2

Post by RooDog » Wed May 16, 2018 2:00 pm

The Evo roller is slightly larger than the Shovelhead roller so this would have a mild effect on valve timing. Now my question is, in the world of mechanical reality would this effect be significant enough to mandate the use of an Evo spec'd cam or can we retain the SH cam and ride merrily down the road?.....RooDog

guppymech
Posts: 23
Joined: Fri Sep 22, 2017 2:33 pm
Bikes: 1984 FXE, 2002 883R
Location: Chicagoland

Re: EVO style lifters for shovelhead...

#3

Post by guppymech » Wed May 16, 2018 3:05 pm

Have a look at Vulcanworks.net, they sell a complete kit. I have no experience with it or them.

pan620
Posts: 68
Joined: Fri Dec 30, 2005 2:28 am
Bikes: 62 Duoglide, 48 Pan, 1990 FLHTCU
Location: Kansas

Re: EVO style lifters for shovelhead...

#4

Post by pan620 » Thu May 17, 2018 2:24 pm

I would look at S+S

kitabel
Posts: 826
Joined: Tue Aug 03, 2010 7:10 pm
Bikes: 2008 96" Fat Boy TC
Location: New York

Re: EVO style lifters for shovelhead...

#5

Post by kitabel » Thu May 17, 2018 7:42 pm

The roller OD difference is just under 10% (.9375" vs. .855"), a significant amount.
It's not the cam specs (opening and closing points) that need to be different, it's the actual shape of the lobe even if the events are identical.
It will probably work OK as -is, the "area under the curve" (total of time open X height) will be slightly larger overall, with slightly altered opening and closing rates in terms of lift per degree of cam rotation at certain points. In theory, a stronger spring is indicated but I think you're safe with the spring set recco'd for the cam.

hplhd
Posts: 603
Joined: Sat Apr 30, 2005 7:16 pm
Bikes: 1998 heritage springer
Location: indiana, usa

Re: EVO style lifters for shovelhead...

#6

Post by hplhd » Fri May 18, 2018 12:53 am

velva touch

RooDog
Posts: 42
Joined: Tue Oct 31, 2017 1:00 pm
Bikes: 1950 Resto-Mod Panhead, 1968 90", 5 Speed Shovelhead, 1984 Evo
100" Bagger
Location: Knoxville, Tennessee

Re: EVO style lifters for shovelhead...

#7

Post by RooDog » Fri May 18, 2018 1:55 pm

I learned this a long time ago: The more you do (change), the more you have to do (additional modifications), in this case a change to Evo lifters & blocks will require special pushrod$ & cover$ too. = more $$$$$s
Even the Velvatouch lifters will require pushrods since the lifters do not stand as tall as the old SH lifters do.... RooDog

hplhd
Posts: 603
Joined: Sat Apr 30, 2005 7:16 pm
Bikes: 1998 heritage springer
Location: indiana, usa

Re: EVO style lifters for shovelhead...

#8

Post by hplhd » Sat May 19, 2018 6:53 am

http://www.velvatouchlifters.com/VELVA_ ... FTERS.html
didn't work in my earlier post. are these what your looking for?

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