speed demon or mighty demon? - 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 04-09-2008, 12:56 PM
malc's Avatar
Living At The Speed Of Life
 
Last photo:
Join Date: Jun 2003
Location: Espaņa Right Coast
Posts: 3,259
Wiki Edits: 0

Thanks: 90
Thanked 92 Times in 78 Posts
I did check it out before assembly.

BG and Summit need to kiss and make up, Jegs are way too expensive to use for overseas, so I´ve used Holley parts from Summit.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #32 (permalink)  
Old 04-09-2008, 01:01 PM
Member
 
Last photo:
Join Date: Feb 2005
Location: chillicothe oh
Age: 47
Posts: 1,445
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Again guys I got to say the one time I've messed with a BG carb and it was wrong for the application, no fault of BG's explained the situation and they were gracious to take it back for a full refund with no problems.
Reply With Quote Quick reply to this message
  #33 (permalink)  
Old 04-09-2008, 06:28 PM
Member
 
Join Date: Mar 2004
Location: mission viejo CA
Age: 52
Posts: 36
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I still am going to buy another demon, I called prosystems today and they will let me ruturn my 950hp and are going to build me a smaller carb, but like i said I am going to get another demon just to have and compare.

So I decided to try my 625 cfm road demon jr on my 408 as I wont have a carb for a while, I was amazed as it shouldn't work good on my 408 but it idled nice and except for a small part throttle stumble ran great but after about 5 mins of driving it just stopped, I popped the hood and fuel was leaking and I noticed the front fuel bowl was filled all the way to the top and gas was just pouring into the engine, I lent it actually sold it to a friend for his 289 which had major rust in his tank, before he sold the car I gave him an edelbrock and took the demon back.......I could blame BG, but I know what the problem is........

Tech@BG why does a road demon jr run so good when I should have a "mighty demon"? Makes me think a speed demon will work just fine as it did with my 650vs speed demon.

I know duration of cam determines demon types, my int duration is within a speed demon (231.5), my exhaust duration is 2 deg's more than a speed demon (242)

Yet my cam is a custom cam that does not have a lot of overlap, is this a factor? It pulls 13-14hg at idle.
Reply With Quote Quick reply to this message
  #34 (permalink)  
Old 04-09-2008, 07:17 PM
Member
 
Join Date: Mar 2004
Location: mission viejo CA
Age: 52
Posts: 36
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I have decided to buy a mighty demon 750 annular, also Pro-systems agreed to let me return my 950 hp and they will build me a smaller carb, 750 hp or so.

Its always good to have a "backup" I guess, After I receive both carbs I am going to tune them myself and then take my car to Superior Auto in Anaheim CA, I will have them baseline everything and then tune both carbs just for "information" Both carbs should flow similar airflow, but I am guessing they will be real close. The reman demon is under 500.00 (I'm Buying)or 549.00 new, the pro-systems was about 720.00.

I'm not doing this because I have money to burn, I really want efi but it's way more right now and I would like to post real world findings and know for myself what the results are. A lot of people bash demon carbs, some bash holleys but we are all looking for the best HP per dollar spent right?

As far as remanufactured products, I have great luck with them, they are cheaper AND have been gone thru at least twice.......

Last edited by htwheelz67; 04-09-2008 at 09:07 PM.
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Speed Demon Available with Changeable Air Bleeds? Dino Boreanaz Engine 6 02-10-2007 11:00 AM
Speed Demon or Holley granprix76 Engine 4 04-06-2005 05:37 PM
mighty demon to big mychevystang Engine 8 02-26-2005 07:24 PM
575 speed demon Gmachine Engine 12 04-09-2004 02:20 PM
Adjusting a speed demon carb Bradless Engine 2 01-03-2003 03:29 PM


All times are GMT -6. The time now is 12:27 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.