Garden Tractors - 616 ,720 hp. differance

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616 ,720 hp. differance

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Garden Tractors
Forum Description: A great place to discuss the Simplicity and Allis Chalmers Garden Models
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=184139
Printed Date: 18 Apr 2024 at 11:44pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 616 ,720 hp. differance

Posted By: HudCo
Subject: 616 ,720 hp. differance
Date Posted: 24 Oct 2021 at 4:38pm

what makes up the hp differance between the ccka and the cckb i know the charging system is differant but that would not make any differance is it just the carb and manifold?

Replies:

Posted By: Bird76Mojo
Date Posted: 25 Oct 2021 at 9:25am

I'm no expert, but being a 616-720 owner, that is my understanding after years of research. The primary difference being a downdraft carb vs a side-draft carb.

Posted By: coggonobrien
Date Posted: 18 Feb 2022 at 9:30am

intake manifold is long runner vs short runner as well, air velocity = cfm

Posted By: talntedmrgreen
Date Posted: 28 Apr 2022 at 10:41am

The engines are also spec'd to run at different RPM's. The CCKB achieves max power with a higher max rpm spec. I have not known this to be an issue in the tractor world, but if you poke around Onan engine/generator forums, you will find many jokes about wearing a catcher's mitt when running a CCKB, due to the flying rods.

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Posted By: HudCo
Date Posted: 28 Apr 2022 at 11:19pm

i have a cckb engine here i do not even know if it runs or not but i just got gaskets to put the b manifold and carb on