no low end power

12 Bravo

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Thread starter #1
i ran the truck on fathers day and it ran awesome, got it back out 3 days later didnt want to start, no low end power and once it went about 30' it would start pulling hard on the top!!i run ethanol free 90 octane fuel wit klotz super techni plate oil mixed at 32-1. i've tried adjusting the carb with no change to how it runs. everything turns freely,any ideas whats the problem could be
 

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Have you looked at the clutch? Could be the spring is allowing it to engage too early.
i was thinking the clutch and i have it apart and 1 shoe is worn down to the metal in the center,whats the best way to check the spring?
 

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well i put a new clutch and it's the same story, i did notice that it gets worse the longer i run the truck
 

Paul G

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#15
Does the clutch bell carrier have any venting? Clutch may be suffering from fade. When it heats up the shoes sometimes glazed over and does not perform well. What spring is in it? 8k is stock I wouldn’t go less really. Lower engagement doesn’t allow rpm rage to get up to a snappier take off. Lower rpm range may cause you to basically ride the lower rpm range until you get into the power band and then you have performance. Just a thought.


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the muffler is causing all the problems!!!took it off yesterday to see what would happen and it starts , runs i still have the carb a little out of adjustment. i'm soaking it in gas overnight to see if that will clean it out
 

Paul G

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#19
Yeah I believe a stock exhaust has like an insulation in it. Maybe it got wet from fuel or washing your truck. Most guys prefer to use an after market pipe for power improvements and those do not have anything inside them. It’s the shape of it that creates back pressure so your engine performs better. Glad you got it figured out. Good luck


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