Heat Riser ?? - Team Camaro Tech
Tech 2000 Our previous General Forum
Replies ONLY - no new topics.

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old Nov 17th, 00, 03:40 AM Thread Starter
Tech Team
 
Join Date: May 2000
Location: Greenville, SC
Posts: 93
Post

I'm having duals put on today, and the "heat riser" (that's the only term I know to call it) is rusted so bad it fell apart. How critical is this to proper operation? I live in South Carolina, so not severe cold. Chevy dealer no longer lists it or the manifold. If my carb choke system is OK, will this matter?

Thanks,

H-dog
H-dog is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old Nov 17th, 00, 09:50 AM
Senior Tech
 
Join Date: Nov 1998
Location: ohio
Posts: 252
Post

Back in those good old days the first thing we did was wire this thing open. Tried to take it out but the pipes wouldn't line up just right so I would knock out the flapper and plug up the shaft holes. Never made any difference with cold weather driving, and it gets cold up here. If your pipes will fit ok, don't worry about it.
tom3 is offline  
post #3 of 4 (permalink) Old Nov 17th, 00, 12:05 PM
Senior Tech
 
Join Date: Feb 2000
Location: Waldorf,Md,USA
Posts: 176
Post

You can get either the valve assy or the open spacer at your local NAPA store. they sell Walker exhaust parts. You definitely need something in there to take up the space.

------------------
Leo Paugh
MCC #017
www.clark.net/pub/chevelle/mcc.htm
There are no strangers here, only friends you haven't met.
chev64 is offline  
 
post #4 of 4 (permalink) Old Nov 17th, 00, 04:12 PM
Team Member
John
 
JohnZ's Avatar
 
Join Date: Sep 2000
Location: Washington, Michigan USA
Posts: 7,728
Post

The heat riser does two things - it heats the floor of the manifold to improve fuel/air atomization when the engine is cold and reduce "wetting-out" of fuel on the port walls, and it provides heat for the bimetallic choke stove next to the carburetor. Without a heat riser, the choke stove may not ever get hot enough to fully open the choke blade, resulting in poor fuel economy. Most Camaros I've seen without heat risers or with headers have the choke wired full open. I just replaced the heat riser on mine (stock exhaust system) and it markedly improved cold driveability and warm idle stability - with our weather, it's a necessity.

------------------
JohnZ
'69 Z28 Fathom Green
JohnZ is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user 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.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not 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

 
For the best viewing experience please update your browser to Google Chrome