Do I need to get my pistons notched with X cam? -

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.

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Old 05-24-2007, 08:50 PM   #1  
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Default Do I need to get my pistons notched with X cam?

Im putting a x cam in my car with portedDO0E 351 heads with heavy valve springs and 1.6 roller rockers. Does anyone know if I will have to notch the pistons for this cam? Also I wanted to a run thin head gasket to boost up the compression a bit do you think this will cause any clearence issues? btw its a stock 89 Shortblock.
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Old 05-24-2007, 10:02 PM   #2  
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Default RE: Do I need to get my pistons notched with X cam?

with 1.6 roller rockers, according to several post, looks good, go for it.

B303 has duration of 284/284 and lift of .480"/.480" for 3500-5400 rpm
the E303 has duration of 282/282 and lift of .498/.498 for up to 6000 rpm
the X303 has durtion of 286/286 and lift of .542/.542 big cam for modified engines
the F303 has duration of 288/288 and lift of .512/.512 for more mid range power
the Z303 has duration of 290/290 and lift of .552/.552 for big time torque and HP making
above information is from the Holcomb Motorsports,




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Old 05-24-2007, 11:10 PM   #3  
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Default RE: Do I need to get my pistons notched with X cam?

nice to see someone utilizing the old school 351w heads - even if they arent the best out there

i had em on my 302, and they are going on my 289
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