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Old Apr 7, 2014 | 09:11 AM
  #16  
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I don't like the calculator you used. I entered every single value to the thousandths and your compression ratio is apparently 5.6:1.
 
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Old Apr 7, 2014 | 12:49 PM
  #17  
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I don't believe Rhoads makes roller lifters and that cam is a run-of-the-mill hydraulic grind. I doubt it has roller lifters.
 
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Old Apr 7, 2014 | 12:51 PM
  #18  
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And FWIW, Rhoads lifters are intended to bleed duration off of cams that don't pull enough vacuum off at idle then pump up at rpm. That cam isn't racy enough to make them worthwhile.
 
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Old Apr 7, 2014 | 01:50 PM
  #19  
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That's what I thought about the lifters.

You must have entered something wrong.

I talked to the shop.
It's been a year ish so they don't remember numbers. Said it was built for around 9.5 and medium octane fuel.

Is it worth new lifters and a cam?
Or should I just grab the head and intake and exhaust and build my block?
 
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Old Apr 7, 2014 | 02:18 PM
  #20  
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I don't think a 300 is near big enough to worry about using Rhoads lifters. If it were a big CID big cam engine...then maybe.
 
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Old Apr 7, 2014 | 02:19 PM
  #21  
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That's what I thought, although maybe he had a set laying around and figured he would use them?
 
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Old Apr 7, 2014 | 06:03 PM
  #22  
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The lifters were to get more top end, it will be stock down low and then the full 1.75 rocker up top
Still had the matching lifters for the cam
And dual springs from Alic inline with 135 closed and for .550 lift
 

Last edited by dylansf23; Apr 7, 2014 at 06:43 PM. Reason: I'm stupid and can't read. spring rate fixed.
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Old Apr 8, 2014 | 06:20 AM
  #23  
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Would ethanol free 93 octane be a better then pump gas? I have a station right by the house and a 38 gal tank plus a 19 should get me wherever and back.

Also I'd like to know about how I could go about dropping the cr. Bigger gasket, cleaning the cc maybe digging a little deeper? and maybe cutting the edges off the Pistons?
 
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Old Apr 8, 2014 | 04:15 PM
  #24  
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Ethanol has higher octane than gasoline.

I'd find a core and build an engine myself. What you're looking at isn't necessarily bad, but there are too many question marks.

On the Rhoads lifters, you usually see them on race cars where there's a vacuum rule - i.e. must have X" of vacuum at idle - to bleed duration from a long duration (230°+ @.050") cam at low rpm.
 
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Old Apr 8, 2014 | 04:45 PM
  #25  
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I can't build one my self. This is my dd and I'm deployed. F I build one and buy all the Intake and parts, it'll cost me more then that. I can swap the carb and lifters with spares I have. Also with a good few minutes at the hand of my machine shop and a bigger gasket I'll run fine on a lower then race octane.
Plus the extra parts I get soften it up. I can throw the 249 head on my current engine after a bore and slowly build that one to an extreme.
 
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