Re: What is Proper Valvetrain Geometry?
[Re: MadMopars]
#1685550
10/16/14 01:18 PM
10/16/14 01:18 PM
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here is my theory, at my level it is not significant enough to make a big difference. if some of you think it is give us some facts. like HP difference and dyno info/ life of the motor etc. I haven't seen anyone offering anything but unproven opinion. and yes I do visually check contact points through the motion but I have never worried about if the geometry is off a little. I am sure at high levels it becomes more crucial.
Just curious, in your opinion is .025 net lift loss significant? I ask because that's what I've lost by changing my geometry.
I also gain and or lose over 400 useable RPM in my shift points by changing the geometry.
Still not to worry about?
no because I am not worried about a few HP, like I said I am a bracket racer and as long is it doesn't have a reliability issue I could care less. tell me how much power you lost?
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Re: What is Proper Valvetrain Geometry?
[Re: MadMopars]
#1685552
10/16/14 01:36 PM
10/16/14 01:36 PM
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here is my theory, at my level it is not significant enough to make a big difference. if some of you think it is give us some facts. like HP difference and dyno info/ life of the motor etc. I haven't seen anyone offering anything but unproven opinion. and yes I do visually check contact points through the motion but I have never worried about if the geometry is off a little. I am sure at high levels it becomes more crucial.
Just curious, in your opinion is .025 net lift loss significant? I ask because that's what I've lost by changing my geometry.
I also gain and or lose over 400 useable RPM in my shift points by changing the geometry.
Still not to worry about?
no because I am not worried about a few HP, like I said I am a bracket racer and as long is it doesn't have a reliability issue I could care less. tell me how much power you lost?
Sounds like you already know how much I lost.
So we agree it makes a difference?
I don't think so because i don't think you can tell me exactly?
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Re: What is Proper Valvetrain Geometry?
[Re: Quicktree]
#1685554
10/16/14 01:52 PM
10/16/14 01:52 PM
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Posts: 1,292 Tucson AZ,
MadMopars
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" a few HP", those were your words. I thought maybe you had some hard facts from experience you were throwing out there since that's what your looking for from everyone else. For what it's worth, I will state that without a doubt Valvetrain Geometry does affect engine performance characteristics. To what extent is relative to each individual build... Your results may vary.
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Re: What is Proper Valvetrain Geometry?
[Re: Thumperdart]
#1685555
10/16/14 02:03 PM
10/16/14 02:03 PM
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MadMopars
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Thumper, I agree there are other variables to consider. I plan on performing additional testing to reduce the amount of these variables and as such provide more solid information. I typically measure success by E.T., others may use engine longevity or chase a dyno sheet. I post questions on this forum to learn. I can usually weed through the posts and find something beneficial to my application. Not all information applies to everyone. I will try to provide more information in the near future so that hopefully individuals can benefit from my experience just as I have from others.
Last edited by MadMopars; 10/16/14 02:04 PM.
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Re: What is Proper Valvetrain Geometry?
[Re: MadMopars]
#1685557
10/16/14 06:27 PM
10/16/14 06:27 PM
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"a few HP", those were your words. I thought maybe you had some hard facts from experience you were throwing out there since that's what your looking for from everyone else.
For what it's worth, I will state that without a doubt Valvetrain Geometry does affect engine performance characteristics.
To what extent is relative to each individual build... Your results may vary.
I thought I was pretty clear, I don't check it and don't worry about it. I have no idea how much difference in HP thats why asked for info from people who have fact/dyno data. im curious to know.
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Re: What is Proper Valvetrain Geometry?
[Re: jamesc]
#1685562
10/16/14 08:02 PM
10/16/14 08:02 PM
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so what we're talking here is less than a 1% difference? thanks but i'll concentrate my efforts elsewhere long as it's not damaging parts i'm ok with it if i should ever decide to run comp eliminator maybe i'll revisit that position
lol yea thats really worth the effort
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Re: What is Proper Valvetrain Geometry?
[Re: B3RE]
#1685563
10/16/14 08:02 PM
10/16/14 08:02 PM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
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Got any before after set up info? Mid lift, 2/3rds lift? Where did the 90* occur in the lift before correction?
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: What is Proper Valvetrain Geometry?
[Re: B3RE]
#1685564
10/16/14 08:03 PM
10/16/14 08:03 PM
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Before and after graph.
pretty much what I thought, thanks for posting
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Re: What is Proper Valvetrain Geometry?
[Re: B3RE]
#1685568
10/16/14 08:45 PM
10/16/14 08:45 PM
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Chris'sBarracuda
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so what we're talking here is less than a 1% difference? thanks but i'll concentrate my efforts elsewhere long as it's not damaging parts i'm ok with it if i should ever decide to run comp eliminator maybe i'll revisit that position
lol yea thats really worth the effort
yeah, I thought a couple tenths was worth it too.
There's NO WAY that's a couple tenths.. Total BS..
Chris..
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