(800) 853-2651
SHOP NOW

John Deere 730 diesel injector cracking pressure

B

Brad Vinkemeier

Member
On a John Deere 730 diesel Bendix injectors with 12thousandth 6 hole orfices with 140 degree spray pattern how much should a person have the cracking pressures bumped up i know stock pressure is around 2600psi and i was wondering about the bosh pumps should i have them rebuilt with the bigger plungers or will the stock 13mm plungers rebuilt be sufficient enough to provide enough fuel with a ported and pollished intake manifold and head with stainless steal 830 valves with a 5 angle seat grind
 

There are 15mm pumps out there... I don't think we increased the pressure much... been a while since we played with the 2 cylinders diesels
 
I put injectors in my 720 in '05, they have higher cracking pressure and a tad more advance. Don't remember what the hole diameter or the spray angle. Would have to contact the guy who built them.
Later I got a set of 13.5mm pumps from the same place. Together they put more than enough for a 720, I have the rack closed way down. They would be more suited for an 820.
Please email me at gpuller at hot mail dot com, we can talk more about the pumps. Plus I'd like to ask you some questions about the 830 valves in a 720/30 head.
 
If you adjust the rack on a dyno. You will find that power stops increasing even though fuel flow continues to be increased.
Work on the airflow instead or a place to hide a NOS system.
I had a link on here one time to an antique engine site that listed pumps by body size/stroke and the various internal elements .
The 13mm pump and 6x12 tips are lots for any natural aspirated 730.
 
You must log in or register to reply here.

Similar threads

J
John Deere 730 diesel
Replies
7
Views
387
rustred
rustred
H
John Deere 730 power steering
Replies
11
Views
3K
Rich Duane
R
A
John Deere 4240 with fuel problems????
Replies
1
Views
692
Dieseltech
D
T
John Deere 3020 Diesel Injector Cups(?)
Replies
7
Views
2K
Dieseltech
D
T
Battery size for John Deere 730
Replies
9
Views
1K
55 50 Ron
5
Tractor Parts Tractor Manuals

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.

Copyright © 1997-2024 Yesterday's Tractor Co.

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.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top