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Gen III LM7 Limit

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Old Jun 25, 2013 | 02:31 PM
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Default Gen III LM7 Limit

How much power (or boost/timing) have you gotten out of your stock gen III 5.3L LM7 bottom ends? Just curious if I should start looking into a gen IV short block or other stronger options now

Last edited by Ferocity02; Jun 25, 2013 at 02:39 PM.
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Old Jun 25, 2013 | 02:49 PM
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it all honestly depends what youre doing with the truck. are you racing every weekend at the track where its gonna see WOT full boost, or you just DDing with the occasional spirited take off from a light?
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Old Jun 25, 2013 | 02:51 PM
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Originally Posted by black00chev
it all honestly depends what youre doing with the truck. are you racing every weekend at the track where its gonna see WOT full boost, or you just DDing with the occasional spirited take off from a light?
It's a DD street truck, it will never see the track. I get into boost maybe 5-8 times a day and usually for only a second or two each time.
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Old Jun 25, 2013 | 03:01 PM
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sprayeddenali was throwing 20+ with his twin setup
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Old Jun 25, 2013 | 06:41 PM
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15 psi for a while now with a 80mm and its holding up fine. I have plans for 20+ psi when I get it back on the road/track
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Old Jun 25, 2013 | 07:00 PM
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You ask ALOT of questions LOL
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Old Jun 25, 2013 | 07:49 PM
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Find the limit of YOUR motor and let us know... timing and boost of course. With a good tune I don't see why it wouldn't last a year or 2 at 700 plus rear wheel. Rinse and repeat
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Old Jun 25, 2013 | 08:45 PM
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I your DDing and barely getting into boost, I don't see why you cant max that 76mm out from time to time.
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Old Jun 26, 2013 | 01:25 AM
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lol, I remember my stock LM7 lasted 2 days at 450rwph. Stupid tuner...
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Old Jun 29, 2013 | 06:45 PM
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Horrible ****^^
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