Diesel fuel compresses slightly under high pressure. The longer the line, the longer it takes for the injection pulse created at the pump, to make it out the injector nozzle. Thus the reason for keeping all lines same-length (or close). If you shortened all your lines, firing time would be slightly advanced equally. If you shortened only one line, timing would be advanced on one cylinder only.
Length of lines certainly does make a difference. Injection systems gets "injection lag." That is the time difference between when the pressure spike is created at the pump . . . and when injection actually takes place in the engines combustion chamber (or pre-combustion chamber).
When an engine is designed, injection-lag is taken into account and the pump timing specs allow for it. Some makers give you timing specs to be checked AT the pump, while others IN the combustion chamber.
All this is why there is big difference in timing specs if using a diesel line-pulse timing light instead of a luminosity sensor. The former measures injection BEFORE the injector, and the latter measures AT the time of injection. There is often a difference of 3-4 pump degrees (that"s 6-8 engine degrees for a 1/2 engine speed rotary pump).
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
