Farm Equipment - D19 camshaft

D19 camshaft

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=168418
Printed Date: 14 Oct 2025 at 10:49pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: D19 camshaft

Posted By: ditchman24
Subject: D19 camshaft
Date Posted: 17 Feb 2020 at 8:39pm

What is the difference between a D19 and a D17 Diesel cam? Someone mentioned that a gas cam would work or more power? In a diesel. In need of a cam for my D19 Diesel. Looking for some options.

Replies:

Posted By: tbran
Date Posted: 18 Feb 2020 at 3:49pm

74516085 shows to be the cam for the D17 and D19.

-------------
When told "it's not the money,it's the principle", remember, it's always the money..

Posted By: ditchman24
Date Posted: 18 Feb 2020 at 5:28pm

Is that the diesel cam? Someone mentioned running a gas cam in the diesel. Dose anyone have any specs on the different cams? Just wondering how different the gas is from the diesel.

Posted By: tbran
Date Posted: 18 Feb 2020 at 6:07pm

lift on valves are the same gas vs diesel

gas intake opens 27 deg BTDC closed 57 deg ABDC

diesel intk opens 10deg BTDC close 38 deg ABDC eff sn D 01499

" " " 30 deg " " 40 " " prior to D-01499 these were mostly

changed out

gas exh opens 59 deg BBDC closes 25 deg ATDC

diesel " " 40 " " " 15 " " Effective SN

" " " 50 deg " " 70 " " Prior sn

the theory was with turbo the more valve opening the more HP - and it did - but it took a can of ether or gas or TNT to crank one north of the mason/Dixon line in the winter.

ME thinks the gas cam might just give more hp... but at the expense of ez starts. We have had D19's on the dyno's through the years and can get 80 hp by advancing the timing on the pump - but they will not start. When timed to start they will pull 65-70 hp with the late cam. We never dyno'd an early cam that we know of.

-------------
When told "it's not the money,it's the principle", remember, it's always the money..

Posted By: ditchman24
Date Posted: 18 Feb 2020 at 6:58pm

Thanks for the information. That answered my questions. I need to find me a diesel cam then. Iowa gets pretty chilly now and then.

Posted By: levipatch
Date Posted: 18 Feb 2020 at 7:22pm

That is very interesting and not what I expected... Good imfo ... I like!!!!!!!!!!!!

-------------
Billy..Big cam 300, bcam 400,,941 CAT.,,Deere excavator..900 row crop.. 66 D 17 diesel IV... 985 Pratt and Whitney..4360 Pratt and Whitney... gitten tired !