Yesterday's Tractor Co. New Parts for Old Tractors
Click Here or call 800-853-2651 
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 
Marketplace
Tractor Manuals
Tractor Parts
Classified Ads
Photo Ads

Community
Discussion Forums
Project Journals
Tractor Town
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Galleries
Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Articles
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs
Glossary

Miscellaneous
Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
TractorLinks.com
Ford 8N/9N Club
Today's Tractors
Garden Tractors
Classic Trucks
Kountry Life
Enter your email address to receive our newsletter!

subscribe
unsubscribe
  
Harry Ferguson Tractors Discussion Forum
Show Parts for Model:

Re: Intake manifold differences.

[Show Entire Topic]  

Welcome Guest, Log in or Register
Author  [Modern View]
Jason S.

11-10-2013 05:29:36
174.237.2.148



Report to Moderator

I can't agree with all of that. Runner lengths are important to any engine regardless of the application. You also have to remember that the Z120 had a longer duration camshaft than the Z129 or Z134 which would make the Z120 even more sensitive to plenum and runner size.




[Log in to Reply]   [No Email]
Jerry/MT

11-10-2013 10:58:42
206.183.116.145



Report to Moderator
 Re: Intake manifold differences. in reply to Jason S., 11-10-2013 05:29:36  
Runner L/D is important for performance improvements that will occur in a vey narrow range of rpms. These engines are designed for operation over a wide range of rpms.

Further, as I recall, the lower the rpm the greater the required L/D to get an induction improvement. It might be practical for a racing application at 6000+ rpm but for a tractor operating between 1200 and 2200 rpm it would be difficult to fit in the allowable space envelope.

[Log in to Reply]  [No Email]
Jason S.

11-10-2013 18:07:41
174.237.2.148



Report to Moderator
 Re: Intake manifold differences. in reply to Jerry/MT, 11-10-2013 10:58:42  
I copied this out of engine building 101

Intake Port Area
Unlike intake runner length which effects power over a narrow rpm range, the size (area) of the runner will affect power over the entire rpm range. If the port is too small it will restrict top-end flow and flow, and if it's too large velocity will be reduced and it will hurt low-end power. The larger the port is, the less strength the pressure waves will have.

There you go, it is the runner length that effects power over a narrow rpm range but the port area effects power over the entire rpm range which is what I'm saying. It would be like putting a large plenum large runner intake on a dump truck motor. Low end torque would suffer because the engine was not designed to move the amount of air and run the rpms that it takes to keep velocity up in that style of intake. There is an old rule of thumb that you never want to have the port size bigger than the intake valve diameter. The original intakes plenum and runner was 1.00" as I measured today. The aftermarket was 1.25" which is closer in size to the 1.14" intake valve size of the Z129 and Z134 engines. Also adding plenum volume raises the rpm that peak torque would would occur at. Look at the picture not only is the aftermarket a 1/4" bigger in diameter look how much longer it is which is adding plenum volume to the intake that only high rpms or added cubic inches could benefit from.

[Log in to Reply]  [No Email]
[Show Entire Topic]     [Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:

TRACTOR   PARTS TRACTOR   MANUALS
Same-Day Shipping! Most of our stocked parts ship the same day you order (M-F).  Expedited shipping available, just call!  Most prices for parts and manuals are below our competitors.  Compare our super low shipping rates!  We have the parts you need to repair your tractor.  We are a Company you can trust and have generous return policies!   Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ More Info ]

Home  |  Forums


Copyright © 1997-2014 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