compression ratios

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Jul 18, 2007 | 07:44 PM

jaylariatf150

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Joined: Jul 2007

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From: Midland, ONT

compression ratios

is there a differance in compression ratios between the sohc lightning 5.4 and an f150 4x4 sohc 5.4

Jul 18, 2007 | 10:57 PM

Neal

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Joined: Jan 1999

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From: WINDSOR, ONTARIO, CANADA

HI!... Yes. The LIGHTNING 5.4 has 8.4:1 compression with forged pistons. The regular N/A 5.4's have 9.0:1 compression and use hyperuetectic pistons. Besides that, both 5.4 longblocks are identical.

Jul 19, 2007 | 11:20 AM

Faster150

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Joined: Jan 2005

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From: Fort Worth,Tx

unless u manage to get a 5.4 without the forged crank the pistons is the only difference.

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