Vortec Question - 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
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 06-20-2003, 11:14 AM
Jag Daddy's Avatar
1969 Mustang Coupe Project Car

Last journal entry: New Project Mustang, From Jag Daddy to Stang Daddy
Last photo:
Join Date: Mar 2003
Location: Valencia, California
Posts: 1,143
Wiki Edits: 0

Thanks: 18
Thanked 0 Times in 0 Posts
Vortec Question

Are the exhaust ports the same on the Vortec heads? If I replace my current heads with Vortec's will the headers I'm ordering still fit???? I know I'm going to need a new intake but I didn't want to order my new headers until I'm sure. Ideally the ports are the same so I could use them now on my exsisting heads


Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 06-20-2003, 11:50 AM
New Member
Join Date: Mar 2003
Location: Kansas City
Posts: 13
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Yes, the ports should be the same.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-20-2003, 11:51 AM
bullheimer's Avatar
NEVER use credit cards!

Last journal entry: car with tt2's, (stockers going back on)
Last photo:
Join Date: Jan 2002
Location: North of Seattle
Posts: 2,939
Wiki Edits: 0

Thanks: 53
Thanked 34 Times in 32 Posts
pretty damned sure

they are, since i never heard anyone EVER mention otherwise
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-20-2003, 03:33 PM
MI2600's Avatar
Member# 3287

Last journal entry: Vortec Heads
Last photo:
Join Date: Jul 2002
Location: N. Muskegon, MI
Posts: 2,632
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The only problem I've found is that 305 heads have a difference and the last bolt on the passenger side won't line up. Some heads had seven bolt holes to compensate. That's why when you buy exhaust gaskets two of the end gaskets have two holes instead of one. What castings do you have?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-20-2003, 04:26 PM
V8 S-10's Avatar
Last photo:
Join Date: Feb 2003
Location: Missouri
Age: 40
Posts: 317
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
It's not only 305s that have that relocated bolt hole. 350s from about 1970 up have it also. I'm not sure but i think the vortecs have 6 bolts like the old heads did.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-20-2003, 05:53 PM

Last journal entry: JB's 37 Pickup
Last photo:
Join Date: Oct 2002
Location: Smoky Mountains
Age: 78
Posts: 2,358
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
JD,I may be wrong on this since I have not paid attention to the cast iron VORTEC head, only the after market. But if you look at the VORTEC intake runner and exhaust runner flow numbers, the exhaust ports have to be larger and I have been told they are the same .250" taller as the intake ports than the old style. That is the way it is on my ETECH heads which is a marriage of the GM VORTEC and GM Fast burn aluminum heads. I had to use a die grinder to port match my exhaust headers. VORTEC heads flow more air, because they have bigger runners, and in theory, they mix the fuel and air better because of the machined design on the intake ports; thus VORTEC name derived from vortex, a phenomen of swirilling air. Almost forgot, I used Sanderstrom Cast Headers which have larger ports and don' t have the sealing problems as tube headers and they are tucked in tighter than Block Huggers. Only drawback is they are PRICEY, but you can move them on to other motors.


Last edited by trees; 06-20-2003 at 06:06 PM.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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

All times are GMT -6. The time now is 09:14 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.