HPRE

Menu

Members Rides

Saturday Ride through the Yarra Ranges


in
Members Rides

65 Guests, 4 Users
gizzo, mtrue77, AgentX, gremlin
Welcome, Guest. Please login or register.
Did you miss your activation email?
August 01, 2014, 10:45:56 PM

Login with username, password and session length

 

Author Topic: Higher lift with stock cams - a possibility?  (Read 766 times)

da punds

  • Fireball 25
  • Neophyte
  • *
  • Posts: 36
  • Karma: 0
  • One of Britain's most northerly Bullet fans
Re: Higher lift with stock cams - a possibility?
« Reply #30 on: May 15, 2014, 05:24:52 AM »
Hi,
although not using the shotgun rockers, I have roller ratio rockers in my big head, I run mine on the loose side, I can just detect a bit of vertical movement. This seems to be a good balance and is not really noticeable over other engine noises.
Kevin

ace.cafe

  • Grand Gearhead
  • *****
  • Posts: 7990
  • Karma: 0
  • World leaders in racing or performance Bullets
Re: Higher lift with stock cams - a possibility?
« Reply #31 on: May 15, 2014, 12:29:00 PM »
Kevin,
Loose is good for your rockers.
.0045" cold lash would be the "neutral setting" for your rocker ratio.
Regarding noise, rockers just like ours are routinely run in racing cars and hot rods at .020" lash, so no real worries about beating anything up from lash.
But, if you prefer it where you have it, by all means,  use that setting.

BTW, have you checked your compression to see how much it was with these rockers? I remember one comment about low rpm torque when you were setting up your SuperTrapp exhaust. This rocker ratio can lower dynamic compression, and your torque may benefit from removing some of the gasket thickness under the barrel.
« Last Edit: May 15, 2014, 12:32:23 PM by ace.cafe »
Home of the ACE Fireball 535 Bullet,  Ace GP Hi-Lift Roller Rocker Head Conversion. Pistons, cams, etc. Highest performance Bullet engine mods available anywhere.  AVL mods available. UCE kit coming.

Please visit my new website:
http://autos.groups.yahoo.com/group/AcePerformanceBullets/