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Best Cyl. head for a 427

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Old Jan 11, 2016 | 12:10 PM
  #21  
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RHS LS7 heads would be what I'd put on it.
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Old Jan 12, 2016 | 05:45 PM
  #22  
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Originally Posted by Jeffrey1
Can you explain a little better to me what you mean about train wreck waiting to happen. Is the motor going to blow
IMO the lobe acceleration and the jerk that lobe will create is way to aggressive for a street engine.

The short seat timing and somewhat low lobe lift is an instant indicator that this lobe is more of a "square" shape which is known to be more aggressive in terms of cam lobes.

The .200 number is important as well in determining this fully, which you have not provided. I assume that these are XER lobes ground on a Comp Cam core.
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Old Jan 19, 2016 | 09:12 AM
  #23  
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Originally Posted by Martin Smallwood
IMO the lobe acceleration and the jerk that lobe will create is way to aggressive for a street engine.

The short seat timing and somewhat low lobe lift is an instant indicator that this lobe is more of a "square" shape which is known to be more aggressive in terms of cam lobes.

The .200 number is important as well in determining this fully, which you have not provided. I assume that these are XER lobes ground on a Comp Cam core.
So it sounds to me like you would do a cam swap some Ls7 heads and a new intake. What kind of power should that get me
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Old Jan 19, 2016 | 09:33 AM
  #24  
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Originally Posted by Martin Smallwood
IMO the lobe acceleration and the jerk that lobe will create is way to aggressive for a street engine.

The short seat timing and somewhat low lobe lift is an instant indicator that this lobe is more of a "square" shape which is known to be more aggressive in terms of cam lobes.

The .200 number is important as well in determining this fully, which you have not provided. I assume that these are XER lobes ground on a Comp Cam core.
So it sounds to me like you would do a cam swap some Ls7 heads and a new intake. What kind of power should that get me
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Old Jan 24, 2016 | 12:46 PM
  #25  
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How much power it the stock fuel system good for meaning lines and rails.
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