5.3 Engine Indentification Help!!!

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Aug 30, 2010 | 12:31 PM

#11

PitchblackC3

Formerly 99-2door-08/30/2010

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From: Broken Bow, OK

Quote:

Originally Posted by viciousknid

https://www.performancetrucks.net/fo...hlight=pistons

To add. IIRC 4.8 should have flat top pistons and 5.3 has dished. 4.8 has higher compression because of this.

The 4.8 doesn't have higher compression than the dished 5.3. The 4.8 has less displacement with the same combustion chamber. The flat tops just bring the CR to the same level as the 5.3, not more.

Aug 30, 2010 | 11:14 PM

#12

viciousknid

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From: Dover, Oklahoma

Quote:

Originally Posted by PitchblackC3

The 4.8 doesn't have higher compression than the dished 5.3. The 4.8 has less displacement with the same combustion chamber. The flat tops just bring the CR to the same level as the 5.3, not more.

Makes sense. thanks for the correction.