Dynamic And Static Compression Help

Jorandom said:
Does this seem logical? What do you think on this? This is according to these books.
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You are right on track. But ultimately, YOU have to like the combination. Ask 50 people these questions and you are going to get 50 different answers.
 
I can definitely see that lol. About the 50 different people and answers. You all seem to have a similar understanding. And good experience. I dont have much experience besides what i read. I am kinda a stickler maybe a little ocd when it comes to doing things. Lol. I want to do things right. Thanks everyone for the messages and Guidance. For helping me understand. . I appreciate it.
 
Loves302chevy. That sounds like it would be a nice engine you built. I would be excited to see how it drives. .

On a side note. If you where putting something together like what i am wanting. What would your combination of parts be?
 
I agree with Grumpy, you need to match the parts to hit a dynamic CR closer to 8, with iron heads stop at 8, aluminum heads maybe 8.25.
 
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This is with the 264Megacam one is straight up and one is 4* adv.

Camshaft new ISKY
Grind No./Type: 264-MEGA HYDRAULIC FT**
Application: Tremendous torque & good mid-range power.
9-10.5:1 compr., good idle, stock converter.
3.23-3.70 axle ratio. Up to 625 CFM Carb.
RPM-Range: 2000-5800
Valve Lift Int/Ext: .450/.450 (1.5), .480/.480 (1.6)
Valve Lash Hot Int/Ext: .000/.000
ADV Duration Int/Ext: 264/264
.050 Duration Int/Ext: 214/214
Lobe Center: 108 108° LSA /108° ICL = straight up
 
Jorandom said:
Loves302chevy. That sounds like it would be a nice engine you built. I would be excited to see how it drives. .

On a side note. If you where putting something together like what i am wanting. What would your combination of parts be?
Click to expand...

I (purposely) never thought of it. I have a few engines sitting around already. I don't want to plan another one. But a buddy of mine has a 383 that I'm trying to give him some good advice about. Will he listen? We will see.......
Geoff got this Gen 1 rebuilt 383 long block for next to nothing. It's nothing special - basically a parts store type rebuild with stock rebuilt 76cc heads. Turned down 400 crank, stock rods, .040 over (-5cc) cast pistons that end up .024" in the hole with a stock flat tappet HYD camshaft. Crappy, right? I thought so too. But then I started working the numbers. Even with those 76cc heads, with a .015" thick head gasket to give an .039" quench, the static compression comes out to 9.82 to 1. Looking further, a camshaft with an IVC point of 60 degrees (ISKY 264 Mega) gives a dynamic compression of 8.13 to 1 at 177 ft altitude. Hey, this is starting to look pretty good!
 
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