Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Tractor Talk Discussion Forum

OT-Vortec 4.3 improvements over regular4.3

Welcome Guest, Log in or Register
Author 
DCM

02-22-2005 19:39:40




Report to Moderator

Any notable changes that could be considered upgrades,Dan




[Log in to Reply]   [No Email]
Jimmy King

02-23-2005 05:42:47




Report to Moderator
 Re: OT-Vortec 4.3 improvements over regular4.3 in reply to DCM, 02-22-2005 19:39:40  
I have a 94 and a 02 both high performance, postraction is standard on them. The 94 I got 17mpg just driving it to work. The 02 I 17 or 18mpg and on the highwaylong distence about 21mpg.



[Log in to Reply]  [No Email]
jdemaris

02-22-2005 20:13:17




Report to Moderator
 Re: OT-Vortec 4.3 improvements over regular4.3 in reply to DCM, 02-22-2005 19:39:40  
Vortec is supposed to have better low-end torque and better mileage, partly due to the more direct injection of fuel. I don't believe the better mileage claim. Early 94 engines and older 4.3s have throttle body injection, then for around two years -starting in 94 CPI was used, then CSFI. CPI still uses one central injector like TBI does, but uses separate hoses that run to each port. It also uses a high-pressure 60 PSI fuel system unlike TBI. It is expensive to fix and is replaced as a unit. The later CSFI has a separate injector for each port and has some replaceble parts and is less trouble prone than the CPI. I had a 92 TBI 4.3 Blazer, I have a 94 AWD Astrovan AWD 4.3 with CPI, and two of my sons have 2000 Blazers with 4.3s with CSFI. My older 92 non-Vortec 4.3 Blazer with TBI averaged 14 MPG in the winter in all around driving and got around 19 on the highway under the best conditions. My 94 Astrovan with the 4.3 CPI system gets 14 MPG average and 18 highway, and both of my sons' 2000 Blazers with the CSFI 4.3s are averaging 12 MPG and 18 highway in winter driving. So, I haven't seen any whopping differences in mileage, and I haven't noticed a power increase either. If anything, the mileage has been a little worse with the newer Vortecs. I live in a hilly area, maybe the gains would be different in highway/flatland driving. I will say that all the 4.3s have been more powerful and slightly better in fuel than my 86 Blazer with the 2.8 TBI was. My 6.2 diesel Blazers both will get around 21 MPG on the highway and 16-17 around town, so that beats all the Vortec Blazers.

[Log in to Reply]  [No Email]
Bob

02-22-2005 19:49:35




Report to Moderator
 Re: OT-Vortec 4.3 improvements over regular4.3 in reply to DCM, 02-22-2005 19:39:40  
The Vortec has more power and gets better mileage. The CFI fuel system can be expensive to repair, though!

The intake gaskets on both like to leak in the water passage area.



[Log in to Reply]  [No Email]
DCM

02-22-2005 21:50:15




Report to Moderator
 Re: OT-Vortec 4.3 improvements over regular4.3 in reply to Bob, 02-22-2005 19:49:35  
Thanks for your insights,much appreciated,Dan



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

Hop to:


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. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 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