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5000 RPM drop ????????

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Old Sep 1, 2010 | 05:45 AM
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Default 5000 RPM drop ????????

Hello I've built a new engine 408 cid , After three days of running the engine went to test the engine here, where the shock is that the engine does not go over 5000 RPM with WOT.
i will change the Valve Spring and all the electronic parts ( cam Sensor , crank sensor , map , maf , ecm ) , fuel pump pressure 58 psi AFR 12.8 .




i need
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Old Sep 1, 2010 | 08:56 AM
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Does it idle and run fine to 5K?
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Old Sep 1, 2010 | 09:08 AM
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my TB was only opening 82% last time on the dyno. Looked like it dropped a cylinder after 5K and the tuner quickly let off. Adjusted the cable and it was good to go. Doubt this is your problem, but something to look at.
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Old Sep 1, 2010 | 09:15 AM
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You don't have any friends that would have changed your tune and set a 5K rev limiter do you?
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Old Sep 1, 2010 | 11:15 AM
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Does it idle and run fine to 5K?
about idle its ok

my TB was only opening 82% last time on the dyno
i will chack in the dyno TB opening 100%

same Problem 5000rpm not the highest
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Old Sep 1, 2010 | 04:00 PM
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did your tuner lock the tune to 5000 for you to break it in?
ive heard of people doing that to insure themselves a little with warranty on a motor they just sold and tuned to avoid it coming back broke the next day.
but... i would think he might have told you about it, lol.
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