85 GMC 2500 350c.i. no power - 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> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 05-19-2012, 04:34 PM
91camaroRS3.1
 
Join Date: Mar 2012
Location: morganton NC
Age: 24
Posts: 37
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
85 GMC 2500 350c.i. no power

hey guys. so i got an 85 GMC high sierra 2500, with 250. the guy put on a street avaneger 670 carb, didnt hook it up right, so i had to do that. anyone got a diagram of were vacumes go? but anyways. it runs fine and drives fine, but dosnt seem to have much power? like..its only a lil faster then my wifes fricke saturn..lol i got new plugs and wires. did my best to tune up the car. idles fine and sounds fine when it runs...help..lol

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-19-2012, 06:08 PM
Blazin72's Avatar
You got a leaky spark tube...
 
Last wiki edit: Rearend removal
Last journal entry: General Lee
Last photo:
Join Date: Jul 2005
Location: Union, WA
Age: 32
Posts: 2,868
Wiki Edits: 19

Thanks: 0
Thanked 2 Times in 2 Posts
If it's a stock engine then it's probably not going to be much faster than that. A 3/4 ton has heavy duty axles which means it is going to weigh more than a 1/2 ton. It probably has a Turbo 400 transmission too, I assume? That transmission uses a little more power than a Turbo 350 will too. From the factory the engine made less than 200 hp and now, almost 30 years later, probably makes even less.

You could do things like give it a tune up if you haven't already done so, adjust ignition timing and fine tune the carburetor, etc. But other than that it's going to be an uphill battle.

Last edited by Blazin72; 05-19-2012 at 06:20 PM.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-20-2012, 01:07 PM
Registered User
 
Last photo:
Join Date: May 2009
Location: S/E Michigan
Posts: 653
Wiki Edits: 0

Thanks: 0
Thanked 9 Times in 9 Posts
What size tires and gearing do you have?
Reply With Quote Quick reply to this message

Recent Hotrodding Basics 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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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
GMC Sierra 2500 snydrobert Introduce Yourself 2 07-01-2007 08:43 AM
1986 GMC with t-350C problems twillmott Transmission - Rearend 3 03-25-2007 10:07 PM
'71 Gmc 2500 mercflathead Engine 16 01-08-2007 09:55 AM
1972 Gmc 2500 propaniac Hotrodding Basics 4 01-26-2004 06:45 PM
gmc 2500 1999 marthack Electrical 5 09-26-2003 12:08 PM


All times are GMT -6. The time now is 06:13 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.