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Offline STREETREBEL

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How much Cam
« on: October 08, 2012, 10:56:50 AM »
I have a 1991 "mexican" block 5.0 running engine.
I want to put aluminum heads and a bigger cam in it.
How Big can I go without hitting the pistons?
X cam?
 
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Offline racer99

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Re: How much Cam
« Reply #1 on: October 08, 2012, 02:49:26 PM »
You need to worry about other things also.
Coil bind,pushrod length,P to V clearance,
idle vacuum(if pb),adding a vacuum resv.
rocker arm pattern on valve tips,blah,blah,blah.
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Offline STREETREBEL

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Re: How much Cam
« Reply #2 on: October 08, 2012, 04:16:39 PM »
I will order springs with the cam kit.
I will measure pushrod length when I install the new heads.
Don't need vacuum for anything.
I wanted to know how much lift I can use with the stock stroke and pistons.
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Offline D.R.Ball

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Re: How much Cam
« Reply #3 on: October 08, 2012, 09:32:26 PM »
Check with Crane or Summitt they have people who can answer that question in real time over the phone...
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Offline racer99

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Re: How much Cam
« Reply #4 on: October 09, 2012, 04:31:11 PM »
Installing the cam advanced,straight up, or retarded will
also change P to V clearances.

Intake valve diameter is also part of the equasion.

1.94 will clear where a 2.02,2.05,2.08 wont.

We have used .530 lift with stock diameter intakes
but it wouldnt clear with a 2.02 unless we advanced the cam
to get the int valve to chase the piston down the bore.

I would use .500-.510 for a standard but thats depends how much clearance
you feel safe with.
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Offline STREETREBEL

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Re: How much Cam
« Reply #5 on: October 10, 2012, 05:03:15 PM »
Thank you.
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