Re: 671 DETROIT INJECTOR TIMING in reply to Jon Hagen, 06-26-2015 09:26:56
Thanks for the feedback, I wasn"t sure this was the form to get answers, so I posted on tractor pulling and there were a lot of people there. That"s why I am late replying to your feedback. I now have the correct timing tool(1.484). From setting cams on motor cycles I understand how this makes a motor pull hard by retarding the cam and by advancing the cam gives the motor a lot of top end. But I have never worked on a diesel. I just want my 72 IH 10 wheeler to run good and pull like it did before I had to change a stuck injector. I goofed up and turned the screws on the rack, and un knowingly changed the injectors ability to inject the same quantity of fuel into the cylinders. Now I know!!!! I will set things per the book and hope all turns out ok. Again, thanks for your time and comments....Phil
Re: 671 DETROIT INJECTOR TIMING in reply to Phil H, 07-01-2015 15:47:37
Injector adjustment is critical for easy cold starting and power. The rack lever adjustment is a learned art, more difficult with the old 2 screw levers, much easier with the newer 1 screw levers. Your reward for a careful rack lever adjustment is an old 2 cycle DD engine that idles smooth as an electric motor.
I still have one old DD 8V92 TI set at 440 hp that I crank up once in a while just to hear that sound. Great old motors.
Re: 671 DETROIT INJECTOR TIMING in reply to Jon Hagen, 07-02-2015 11:32:14
Wow, 8v92, 440hp. That is a lot more than my 238hp. I have the 2 screw rack adjustment, on my engine, with 4 exhaust valves. I have watched a few videos on some ways to adjust the 2 screw rack, and can see that it is a matter of feel. Like setting 3-2barrel carbs. If I can get everything right I will be happy. Have a lot of work for this old girl. Seems like everything I have now is old, guess that follows right alone with me. My wife says we"re just getting to be old doggies now. Thanks for the comments Jon.....
Re: 671 DETROIT INJECTOR TIMING in reply to Jon Hagen, 07-05-2015 17:29:07
Hi, thanks for the reply, I"ll bet you had enough power!!!! That"s what I have, a 238hp. I just set the rack and now I"m going to haul some gravel out of the creek. The engine ran real sick last time I hauled 10 yards. So... kind of apprehensive.... but I did every thing the way the book said, and all those who have been good enough to help out with comments......so here goes. I will post my results for those who made comments and tried to help out, many thanks!!!!! Phil H