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Old 05-01-2006, 11:00 PM
351viC 351viC is offline
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5.4 lightning Vs 5.4 Normally aspired

What Are the internal diferences between the 5.4 lightning motor, 5.4 Normally aspired?
and haw much HP and Tq can the regular 5.4 take with out damaging it!

Sorry beginers question but had to ask
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Old 05-01-2006, 11:29 PM
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My understanding is all 5.4's up to 2001 used the good forged crank....after '01 only the Lightning has the forged crank.

All of 'em use the same marginal powdered metal rods.....the rods are the weakest link for the current Lightning.

450 HP at the wheels seems to be a safe limit from what I've read.....aprox. 550 at the crank.

The L uses the 4100R trans as does the 2V 5.4 in the Super Duty..........The 150's use the weaker automatic???
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Old 05-02-2006, 02:22 PM
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thanks for the info
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Old 05-03-2006, 02:45 PM
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The L will also have better/different pistons form what I understand.

450-ish HP is about the limit for a regular 5.4 IMHO.
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Old 05-07-2006, 11:12 AM
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he is correct, L's have forged pistons.
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Old 05-16-2006, 10:47 PM
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It also has 8.4:1 compression on the L
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Old 05-16-2006, 10:47 PM
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