5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

B-303 and 1.7RR

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Old Nov 30, 2008 | 07:59 PM
  #1  
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Default B-303 and 1.7RR

whats the specs on the b-303 cam with 1.7 rr?
Old Nov 30, 2008 | 08:02 PM
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close to .510 lift
Old Nov 30, 2008 | 08:07 PM
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Im not %100 but i think i read somewhere it was .512, but that might have been with 1.72's??Either way good running setup for smaller heads,intake,small cubes.
Old Nov 30, 2008 | 09:38 PM
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it's .510 lift with 1.7s, pretty simple math.
Old Nov 30, 2008 | 09:51 PM
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whats the formula again? im kind of curious now because of my new cam rocker combo.

xe270= .512/.512 lift on a hardland 1.6 rocker.
Old Nov 30, 2008 | 09:58 PM
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.512 * 1.7/1.6 = .544
Old Nov 30, 2008 | 10:01 PM
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thanks! ive seen it a million times but just never had to use it myself till now. ill prolly remember forever now. haha. is that too much for stock bottom end?
Old Nov 30, 2008 | 10:03 PM
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yep or .512/1.6 * 1.7, same diff.
Old Dec 1, 2008 | 06:17 AM
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Originally Posted by FivePointOhh
thanks! ive seen it a million times but just never had to use it myself till now. ill prolly remember forever now. haha. is that too much for stock bottom end?
The lift?.... nope, as long as the valve train is set correctly. My '86 have had a X-303 with 1.72 rockers (.583" lift) for ~14 years. What heads will you use?
Old Dec 1, 2008 | 08:49 AM
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'66 289 heads with 1.94 1.5 valves in them. will there be a problem?



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