aclem Posted July 20, 2013 Share Posted July 20, 2013 broke fitting off manifold that goes to reversing relay. did not have fitting so i took reversing relay off and connected air line together because puff limiter is unhooked too. Can i get away without needing reversing relay? WIth puff limiter unhooked i thought it would have alot of black smoke all the time but only does when you really lug the truck. Boost gauge reads 22-28lbs most time. I dont think truck has all the power. we have replaced air to air radiator and hose to turbo and manifold, fuel filter, brand new reman turbo from D&W, new radiator, new compressor, new air dryer, new rebuilt transmission. next step is a new injector pump. Some repalced one injector line but it still leaks and cant tighten it anymore. Also read on here that injector pump rail can be moved. tried taking cover off but must be we need a special socket to take tamper proof bolt out. any ideas in how to get it out and any other ideas to get more power possibly? should i put new injectors in to when i do pump? thanksA.Clement Quote A.Clement Link to comment https://www.bigmacktrucks.com/topic/31986-89-rd690s-e6-300l/ Share on other sites More sharing options...
GearheadGrrrl Posted July 20, 2013 Share Posted July 20, 2013 If you play with the pump, all you're going to do is get a peakier power curve that will require a transmission with more gears. The 300L Maxidyne puts out peak torque at 1020 RPM, downshift at 1000 and upshift at 1800 and it'll work fine. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/31986-89-rd690s-e6-300l/#findComment-194884 Share on other sites More sharing options...
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