Posted by Brendon-KS on September 19, 2017 at 17:47:57 from (63.245.145.35):
In Reply to: Re: ???????? posted by Guido on September 19, 2017 at 15:30:38:
I've always believed that power loss in turbo engines didn't follow the same rule of thumb that naturally aspirated engines do. If the turbo is set up to maintain absolute pressure there should be no power loss since you'd be stuffing in the same amount of air. This assumes the turbo could spin fast enough to accomplish this. However, if it maintains relative (or gauge) pressure that is referenced to the atmospheric pressure there will be a loss. Even in this case, though, the percentage of total intake pressure lost will be a lower percentage than with a naturally aspirated engine since the reduction in atmospheric pressure will be a lower percentage of the total. For example, the loss of 2 psi from 14 psi at low elevation to 12 psi higher up is a greater percentage of pressure (and power) lost than if running 10 psi of relative boost giving 24 psi and 22 psi, respectively. I easily could be wrong in my understanding, though.
Makes me think of the first car I owned - a 1986 Buick Skyhawk T-Type with a turbocharged 1.8L engine. (Only years later have I learned how rare that car was - I should have hung on to it!) At my home in southeast Colorado (around 4000 ft) the boost pressure gauge would top out around 12-13 psi but in the mountains it would struggle to get to even 10 psi with a noticable power reduction. At 1500 ft in Kansas it would peg the 15 psi gauge which resulted in audible pinging unless I used high octane fuel. I figured that the little turbocharger simply couldn't spin fast enough to maintain even relative pressure at high altitudes.
Upload one or more videos to your post. Photo filesizes should be less than 300K and Videos, less than 2MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
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 - The Engine Rebuild Kit - by Curtis Von Fange. I always liked engine rebuild kits. They have all the replacement parts for overhauling an engine without going to the store to get gaskets, special measuring tools, or miscellaneous parts. They come neatly packaged, clean and tidy. But it's important not to let that packaging lull you into a false sense of security. The appearance of matching sleeves, pistons, rings, and bearings can cause frustration and agony if not properly measured and installed in a workshop environment. Following c
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[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.
