How high to butterfly?
I know many people here are fans of your lobe design and I have read this page on your site. Still, EPS lobes are a mystery to me. I'm guessing your .006 to .050 is a difference of 53 to 56 degrees and the acceleration from .050 to .200 is around 77 degrees but have never seen definative numbers for your lobes. I understand you don't want someone copying your design but how can a informed buyer choose your cams without solid numbers to go on ? I have the same problem with Futral.
Geoff will tell you about anything you want to know though and make you feel more than comfortable with the decision you make. I like how he collaborates, and not dictates, where the build goes.
I know many people here are fans of your lobe design and I have read this page on your site. Still, EPS lobes are a mystery to me. I'm guessing your .006 to .050 is a difference of 53 to 56 degrees and the acceleration from .050 to .200 is around 77 degrees but have never seen definative numbers for your lobes. I understand you don't want someone copying your design but how can a informed buyer choose your cams without solid numbers to go on ? I have the same problem with Futral.
You know how someone walks up to you and tells you how to do something they have no experience with and you look at them with a "Where in the ....". The right person for the job is just like the right tool for the job. A different tool can do it but not as well or even do it at all.
I know many people here are fans of your lobe design and I have read this page on your site. Still, EPS lobes are a mystery to me. I'm guessing your .006 to .050 is a difference of 53 to 56 degrees and the acceleration from .050 to .200 is around 77 degrees but have never seen definative numbers for your lobes. I understand you don't want someone copying your design but how can a informed buyer choose your cams without solid numbers to go on ? I have the same problem with Futral.
If a buyer truly understands what those numbers mean, and is that in depth with a lobe design, they should break out the lobe catalog and pick out what they want instead of going through a third party to design their cam. Otherwise, those numbers are meaningless to a consumer and they should base their purchase on other factors.
I'm new and I know I have alot to learn. Even if I go to, say, the Comp catalog and read the durations at .006, .050 and .200 that's still not enough to tell me how much real overlap I will have or how much vacuum I will generate. Most lobes are asymmetric so those numbers only describe the lift side of the lobe and not the softer closing side. Is this not true ?
Like the Comp XFI intake.
I'm new and I know I have alot to learn. Even if I go to, say, the Comp catalog and read the durations at .006, .050 and .200 that's still not enough to tell me how much real overlap I will have or how much vacuum I will generate. Most lobes are asymmetric so those numbers only describe the lift side of the lobe and not the softer closing side. Is this not true ?
I'm new and I know I have alot to learn. Even if I go to, say, the Comp catalog and read the durations at .006, .050 and .200 that's still not enough to tell me how much real overlap I will have or how much vacuum I will generate. Most lobes are asymmetric so those numbers only describe the lift side of the lobe and not the softer closing side. Is this not true ?
I feel like people tend to overestimate what small changes in camshaft duration will actually mean in regards to real world performance.
On that same topic, some of the test that have been shared with me show that aggressive lobes do not produce the additional power that people believe they do either. In my opinion, 90% of the LS stuff in the Comp catalog are too violent for 98% of the applications that people are using them for.
In the real world, it is plenty accurate enough to estimate that for practical purposes.
I feel like people tend to overestimate what small changes in camshaft duration will actually mean in regards to real world performance.
On that same topic, some of the test that have been shared with me show that aggressive lobes do not produce the additional power that people believe they do either. In my opinion, 90% of the LS stuff in the Comp catalog are too violent for 98% of the applications that people are using them for.
I feel like people tend to overestimate what small changes in camshaft duration will actually mean in regards to real world performance.
On that same topic, some of the test that have been shared with me show that aggressive lobes do not produce the additional power that people believe they do either. In my opinion, 90% of the LS stuff in the Comp catalog are too violent for 98% of the applications that people are using them for.
From what I saw, more aggressive lobes can generate a few more foot pounds of torque at low to low-mid rpm in the applications mentioned above, but then can become a mess at higher RPMs. Since the guys who typically who are attracted to the more violent lobes are not driving tractors, I think the more violent lobes are a bad choice.
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Verdad Gallardo There seems to be a fixation on what is going on between .006" and .050". Some folks think faster is more powerful and some folks think faster will tear up parts. Both are probably true to some extent, but unless you actually know the REAL measurements of what you are buying AND have REAL WORLD experience of knowing how far you can push the envelope with speed, just looking in a catalog at numbers or using advice gained on an internet forum will not necessarily give you the results you are looking for.
Geoff, I know you are the man who designed the Thunder Racing cams; the TR224 is famous. I was just trying to understand WHY the EPS lobe is better.
In this thread I asked for a cam recommendation. What would you recommend for my car ?
rod70, I'm sorry I hijacked you thread . That piston to valve clearance calculator is in this thread.
https://ls1tech.com/forums/generatio...alculator.html
In this thread I asked for a cam recommendation. What would you recommend for my car ?
rod70, I'm sorry I hijacked you thread . That piston to valve clearance calculator is in this thread.
https://ls1tech.com/forums/generatio...alculator.html