kthelton Posted March 28, 2009 Share Posted March 28, 2009 ive got a 90 mod dump truck with a e7 300hp motor ,id like to know how to turn the pump up alittle to give it a little more kick. also it bumps out at about 1900 rpms at maybe 70 mph ....wondering how much i could turn the rpms up and not hut the motor, Quote Link to comment Share on other sites More sharing options...
macktruck505 Posted April 8, 2009 Share Posted April 8, 2009 I took my 91 in for same thing they said they wouldnt get much more than 20 to 25 hp out of it and if it had alot of miles to leave it alone. Quote Link to comment Share on other sites More sharing options...
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