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Re: Setting valve lash at base circle with EOIC, weird result??
[Re: RT540]
#1891147
08/13/15 05:45 PM
08/13/15 05:45 PM
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Joined: Nov 2003
Posts: 1,664
North Sweden
RT540
OP
top fuel
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OP
top fuel
Joined: Nov 2003
Posts: 1,664
North Sweden
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Re: Setting valve lash at base circle with EOIC, weird result??
[Re: justinp61]
#1891148
08/13/15 05:45 PM
08/13/15 05:45 PM
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Joined: Feb 2005
Posts: 20,174
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,174
PA.
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Just put my 16 inner springs in last night. I use my leak-down tester and crank it up to 100 pounds just like doing a leak-down. Could care less where the piston is.
1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27
Livin and lovin life one day at a time
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Re: Setting valve lash at base circle with EOIC, weird result??
[Re: RT540]
#1891209
08/13/15 07:24 PM
08/13/15 07:24 PM
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Joined: Jan 2003
Posts: 19,366
Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,366
Las Vegas
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We go to TDC just in case there is an unexpected issue with the air. Better safe than sorry. Does not take much PSI to hold up the valve.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Setting valve lash at base circle with EOIC, weird result??
[Re: camastomcat]
#1892266
08/15/15 06:17 AM
08/15/15 06:17 AM
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Joined: Jan 2005
Posts: 3,699
Newport, Mi
Evil Spirit
master
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master
Joined: Jan 2005
Posts: 3,699
Newport, Mi
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I have set valves between runs going with the KISS method, Exhaust starts to open, set intake. Intake starts to close, set exhaust. What's the problem? I guess the problem is several people here have seen more intake lash with the exhaust fully open, than when the exhaust just starts to open. Why? Can't tell you, and not gonna waste time trying to explain variances in a method I choose not to use. I use a method that works well for me because it assures that the cam is on the heel of the base circle of the valve I'm setting. Really not as hard to use as has been made out to be, unless you are working on a pipe rack and going side to side a little more often is an issue. Bottom line - Use the system you feel comfortable with. I know I do.
Free advice and worth every penny...
Factory trained Slinky rewinder.........
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Re: Setting valve lash at base circle with EOIC, weird result??
[Re: RT540]
#1892578
08/15/15 08:17 PM
08/15/15 08:17 PM
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Joined: Mar 2005
Posts: 576
Texas
ChevyTS
mopar
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mopar
Joined: Mar 2005
Posts: 576
Texas
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I am having the exact same problem with valve lash on our B1 engine. Eoic method .026 intake .028 nets almost .040 lash on the intake when the exhaust valve is almost full lift. I spoke with Comp cams four times. One guy snaps at me and all but calls me stupid. The other guy tells me to watch a tech video (that I understand) the third guy tells me that I'm over thinking the idea of valve lash then hangs up on me. The fourth guy tells me he doesn't know and has no idea who would. I was frustrated but I was not rude or unprofessional in any way. It's their parts. I am calling back Monday to speak with their supervisors. That being said I do have video of the problem that I am going to post as soon as I can. I simply can't believe that the lash should change that much in a few degrees of crank rotation.
T & K Performance
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Re: Setting valve lash at base circle with EOIC, weird result??
[Re: RT540]
#1892805
08/16/15 03:01 AM
08/16/15 03:01 AM
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Joined: Jan 2003
Posts: 19,366
Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,366
Las Vegas
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Read above, FLEX is a HUGE issue, and it aint just cams flexing. Cams, pushrods, rocker shafts and in some cases even rockers. Maybe if you measure the NET valve lift as well you will being to see the problems.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Setting valve lash at base circle with EOIC, weird result??
[Re: ChevyTS]
#1892953
08/16/15 01:56 PM
08/16/15 01:56 PM
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Joined: Jan 2005
Posts: 3,699
Newport, Mi
Evil Spirit
master
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master
Joined: Jan 2005
Posts: 3,699
Newport, Mi
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I am having the exact same problem with valve lash on our B1 engine. Eoic method .026 intake .028 nets almost .040 lash on the intake when the exhaust valve is almost full lift. I spoke with Comp cams four times. One guy snaps at me and all but calls me stupid. The other guy tells me to watch a tech video (that I understand) the third guy tells me that I'm over thinking the idea of valve lash then hangs up on me. The fourth guy tells me he doesn't know and has no idea who would. I was frustrated but I was not rude or unprofessional in any way. It's their parts. I am calling back Monday to speak with their supervisors. That being said I do have video of the problem that I am going to post as soon as I can. I simply can't believe that the lash should change that much in a few degrees of crank rotation. I had the same kind of issue with them years ago. With a set of their moly roller rockers, the roller was way off center of the valve stem . Factory iron heads, stock valves, stock heights, etc. Their tech (catalog reader) said I had the wrong length push-rods. He couldn't grasp the concept that with shaft mount rockers, push-rod length doesn't affect roller to stem alignment. You don't even have to install the head on an engine to check it. Too many tech depts have catalog readers trying to trouble shoot engineering issues.
Free advice and worth every penny...
Factory trained Slinky rewinder.........
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Re: Setting valve lash at base circle with EOIC, weird result??
[Re: RT540]
#1892972
08/16/15 02:43 PM
08/16/15 02:43 PM
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Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
rowin4
master
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master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
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Don't you guy's have valve stem seals, they have always held the valve from moving for me. On valve adjustment, I set them in the heal and never had a problem. Maybe I should keep rotating until I have a problem.
it's ok to butt heads, just don't do it with a butthead
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Re: Setting valve lash at base circle with EOIC, weird result??
[Re: RT540]
#1893054
08/16/15 05:38 PM
08/16/15 05:38 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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I have teflon seals on all valves. my wife said she seen a motor running on facebook  , awesome
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Re: Setting valve lash at base circle with EOIC, weird result??
[Re: Quicktree]
#1893059
08/16/15 05:44 PM
08/16/15 05:44 PM
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Joined: Nov 2003
Posts: 1,664
North Sweden
RT540
OP
top fuel
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OP
top fuel
Joined: Nov 2003
Posts: 1,664
North Sweden
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I have teflon seals on all valves. my wife said she seen a motor running on facebook , awesome Thanks Tony, I thought she would. Been a long time since you helped me buy the B1 heads 
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Re: Setting valve lash at base circle with EOIC, weird result??
[Re: RT540]
#1893544
08/17/15 01:33 PM
08/17/15 01:33 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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I have teflon seals on all valves. my wife said she seen a motor running on facebook , awesome Thanks Tony, I thought she would. Been a long time since you helped me buy the B1 heads she keeps me informed since I am not much of a facebook person. good to see your progress and some passes soon. one these days you need to make a vacation over here. we are going back down to the Florida Keys next year early spring and catch some more of these. 
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