carb questions - 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
  #1 (permalink)  
Old 04-29-2004, 12:27 AM
mitmaks's Avatar
Member
 

Last journal entry: Grille
Last photo:
Join Date: Sep 2002
Location: Washington
Age: 31
Posts: 1,599
Wiki Edits: 0

Thanks: 4
Thanked 10 Times in 10 Posts
carb questions

ive just won this carb, would it be good carb for street/strip, ive got stock '68 charger r/t with 440, but ive got intake for it that ill install when i install carb and im getting headers
what are your thought on this carb guys?

http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEBWN%3AIT

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 04-29-2004, 01:34 AM
DoubleVision's Avatar
Not Considered a Senior Member
 
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 40
Posts: 10,655
Wiki Edits: 0

Thanks: 15
Thanked 59 Times in 56 Posts
I love my road demon Jr. Demons are great carbs, but there not like most other carbs, there very precise and must be tuned to the application, if the instruction manual don`t come with the carb, it would be a good idea to call BG and request one, it`ll really help you get the bugs worked out of it and right on the first go round, in other words, it`s not a bolt it on turn a few screws carb, the settings have to be on the money for it to perform correctly.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 04-29-2004, 05:02 AM
Grumpy
 
Last photo:
Join Date: Dec 2002
Location: D.C.
Posts: 1,447
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I dont understand the love for the demons, they are just another holley clone. I know they are of better quality than holley, but they are still just another clone.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 04-29-2004, 06:05 AM
Technical Support Barry Grant
 
Last photo:
Join Date: Jul 2003
Location: Dahlonega, GA
Posts: 1,503
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
mitmaks:
That carburetor is going to be a little big on a stock 440. Which will make the idle a little rich, and throttle response won't be as good as a smaller carburetor would be with a slightly smaller carburetor. You could have that carburetor converted over to annular style boosters which would help with your situation.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 04-29-2004, 06:14 AM
stepside454's Avatar
Member
 
Last photo:
Join Date: Dec 2003
Location: St. louis area
Age: 47
Posts: 1,074
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
wow, now thats customer service
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 04-29-2004, 05:04 PM
mitmaks's Avatar
Member
 

Last journal entry: Grille
Last photo:
Join Date: Sep 2002
Location: Washington
Age: 31
Posts: 1,599
Wiki Edits: 0

Thanks: 4
Thanked 10 Times in 10 Posts
ill be adding headers, aftermarket Weiand intake, MSD ignition, would it still be big? ive been told that factory '68 440 had ~750-850 cfm thermoquad carbs on them
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 04-29-2004, 06:01 PM
Technical Support Barry Grant
 
Last photo:
Join Date: Jul 2003
Location: Dahlonega, GA
Posts: 1,503
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Demon carburetors are much less restrictive than other brands of carburetors. That being said our 850 Speed Demon is going to be a bit large for this application even with the changes you are going to make. Converting the carburetor to annular style booster should get it to work properly on your combination.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 04-29-2004, 06:12 PM
mitmaks's Avatar
Member
 

Last journal entry: Grille
Last photo:
Join Date: Sep 2002
Location: Washington
Age: 31
Posts: 1,599
Wiki Edits: 0

Thanks: 4
Thanked 10 Times in 10 Posts
how would i convert it? is that expensive, easy to do?
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 04-29-2004, 06:26 PM
stepside454's Avatar
Member
 
Last photo:
Join Date: Dec 2003
Location: St. louis area
Age: 47
Posts: 1,074
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Id use a 670 Holley vac. sec. on a stock 440 personally if you plan to keep it within 5000 RPMs. John

Thermoquads are a spread bore design, they are more universal & foregiving due to there design, simialer to a Qjet.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 04-29-2004, 07:10 PM
firestone's Avatar
http://teamrfc.gospelcom.net
 
Last photo:
Join Date: Nov 2003
Location: Fenton MI
Age: 32
Posts: 1,743
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
As far as the size goes, I was building a 468 and working with comp cams. That motor was going to be rapped to 6200 rpm, and they recommended an 830 cfm carb, so a 850 might be a tad big on a 440, you could make it work though. As far as barry grant carbs go, I have heard that an average holley dp carb will flow around 10% less than what they advertise. An average demon carb will flow around 10% more than what they advertise, that is why they are so nice. Where a stock 850 holley might only flow around 770-800, a demon 850 will flow around 910-930.

Adam
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 04-29-2004, 08:23 PM
mitmaks's Avatar
Member
 

Last journal entry: Grille
Last photo:
Join Date: Sep 2002
Location: Washington
Age: 31
Posts: 1,599
Wiki Edits: 0

Thanks: 4
Thanked 10 Times in 10 Posts
thats nice to hear, i guess i got good deal afterall, i wont be keeping 440 all stock, as $$ comes in ill beef it all up, new heads etc.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 04-30-2004, 06:04 AM
Technical Support Barry Grant
 
Last photo:
Join Date: Jul 2003
Location: Dahlonega, GA
Posts: 1,503
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
850 Speed Demon on 440

You can send the carburetor to our factory, and we can convert it to annular style boosters for $65.00. As it sits it's going to be too large for the combination.
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:
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



All times are GMT -6. The time now is 02:33 PM.


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.