305 V 350 for MPG - Page 3 - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #31 (permalink)  
Old 12-13-2013, 02:10 PM
Project89's Avatar
Registered User
 
Last photo:
Join Date: Oct 2011
Location: utah
Posts: 1,006
Wiki Edits: 0

Thanks: 12
Thanked 37 Times in 34 Posts
Quote:
Originally Posted by Dragonoake View Post
Basically, you want a high velocity engine with lots of bottom end torque to get that weight moving.
Back in the 80's, "Super Chevy Magazine" had the "Econperformer" project going where a 4100 pound '70 Monte Carlo with a 350 (Crower Baja cam, SP2P intake, and a leaned out Q-Jet), a TH-400, and 3.31 gears was running low 14's@95 mph and getting 25 mpg
And that was with 80's technology; I suspect you could do better applying the same ideas with Vortec heads, a 700-R4, and TPI
vortec heads and tpi is an expensive combination , the vortec tpi base will run u around 600$'s just for the manifold base , by the time u pay for heads and intake etc i would just do an lsx and t56

for the ultimate budget i would do a stockish tpi engine out of a camaro or vette, they can be found cheap for comeplete good engines, hell i just sold a complete 40k mile ( original not rebuilt) l98 and 700r4 combo for 300 bucks

tpi is just that lots of bottom end and falls off fast in the upper midrange

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #32 (permalink)  
Old 12-13-2013, 02:18 PM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 9,484
Wiki Edits: 0

Thanks: 20
Thanked 388 Times in 364 Posts
A drill, epoxy, a sander, and a grinder can make it work too, total cost is about 5 bucks in addition to vortec heads and a tpi intake.

Vortec heads are not needed though.

It is all out of steam at 5000 rpm though.
Reply With Quote Quick reply to this message
  #33 (permalink)  
Old 12-14-2013, 03:03 PM
Registered User
 
Join Date: Jan 2011
Location: Navarre, Fl
Posts: 133
Wiki Edits: 0

Thanks: 17
Thanked 0 Times in 0 Posts
I replaced a stock 350 engine with a 383 stroker and got an honest 2-3 mpg improvement. The stronger engine does not have to work as hard nor does it downshift when going up hills on the interstate. The 350 always down shifted when going up the same hills at the same speed. My conclusion is that with more torque going up in size within reason will move your vehicle with less effort to the motor. I think you will be pleased with the 350 but I recommend using the later model vortec heads.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
350 build for MPG? 79bird Hotrodding Basics 6 04-19-2012 02:40 PM
MPG on a 305 Engine? HHO Carb enhancer? 79bird Engine 5 03-29-2012 08:25 AM
HELP! Opinions needed. 305 vs. 350 for MPG's. Hippie Engine 18 04-11-2011 05:41 PM
305 vs 350 both carb which gives better mpg? iroczfan2009 Engine 7 03-17-2009 08:27 PM
305 vs 350 for mpg's 1948 thames Engine 14 09-06-2005 05:10 PM


All times are GMT -6. The time now is 10:01 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.