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Understanding cams

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Old 07-24-2014, 08:22 AM   #31
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Originally Posted by Loudnproudford View Post
Or .40 on head gasket I'm not sure yet
Have you ever used a compression calculator? They come in real handy when you start throwing all these potential combinations together. There's also a few Virtual Dynos on the 'net that will help you see how your different parts changes will affect your engine. They're very handy tools that'll save you money and frustration down the road. Of course, the dynos aren't 100%. Too many variables between theory and reality. But they'll get you in the ballpark of where you are trying to get with your project.

First thing you wanna do, is have a plan with where you're going with these mods, and what results are you wanting.. Also know that raising compression, just for the sake of it, is no good reason. Raising compression also raises the effective RPM range of your engine. If you want to keep your low end power, I wouldn't go much past 10.3:1. Most "torque" or truck cams don't like more than that. Unless you want your motor living in the 2800 RPM range and up, keep your compression ceiling in that area. Another thing to consider, once you get in the 10:1 compression range, you can pretty much kiss regular gas goodbye. It'll be 89 octane or bust from there on out.
Just my .02

Last edited by BossRacing71; 07-24-2014 at 08:27 AM.
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Old 07-24-2014, 09:48 AM   #32
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I appreciate your help [MENTION=184806]BossRacing71[/MENTION]
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Old 07-24-2014, 03:28 PM   #33
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Originally Posted by Loudnproudford View Post
Mostlikely go .20 over and I think I'll go .60 gaskets
I hope you meant .020 over, if you go . 20 over im not sure you'll have any cylinder walls left, maybe on a 460 but were talking 5.4
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Old 07-24-2014, 03:29 PM   #34
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Got a link to the virtual dyno? That could be interesting
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Old 07-24-2014, 04:32 PM   #35
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I hope you meant .020 over, if you go . 20 over im not sure you'll have any cylinder walls left, maybe on a 460 but were talking 5.4
At .030 over you are getting close to the water jackets in block. That's the most you would ever want to go.
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Old 07-25-2014, 08:59 AM   #36
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Got a link to the virtual dyno? That could be interesting
I'll have to look. The one I use, I downloaded a few tears ago to my PC. I'll see what I can dig up.
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Old 07-27-2014, 05:12 PM   #37
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I apologize I meant .020 over bore wise
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