Car bogs with new Edelbrock 750 - 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 11-13-2004, 07:14 PM
New Member
 
Join Date: Jan 2004
Location: Maine
Age: 35
Posts: 27
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Car bogs with new Edelbrock 750

Ihave a car that is putting about 400 hp to the flywheel. My problem is that when i punch it it will have good response but will soon bog and fall on its face untill it reaches a little bit higher rpm.

This Edelbrock is new, i had a 670 street avenger on there that didnt seem like it was doing the trick. My throttle response is a lot better now but the bogging down is really annoying. I have tried doing everthing with my timing with no luck. I was thinking that i need to lean it out a little by putting a little bit smaller jet and rod in it. Does this sound like a plan to anyone else? Thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-13-2004, 07:48 PM
cboy's Avatar
Member
 

Last journal entry: Finished
Last photo:
Join Date: Jan 2004
Location: Atwater, CA
Age: 69
Posts: 3,918
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Do you have the Edelbrock manual that came with the carb? If not, you can go to their website and read/download it. It will give you a very good run down on how to tune the bog or hesitation out of the carb. It's a MUST for any Edelbrock owner

Before you try jets and rods, however, I would try changing the springs. I had a hesitation when I stood on it with my 750. In fact, I would get a backfire through the carb. I swapped out the stock springs for the blue springs (you can get the spring kit from Edelbrock for a couple bucks or at your local speed shop if you have one nearby.) and my backfire/hesitation went away. I tried moving to the next leaner rod/jet combination (a suggestion made by Edelbrock tech support) but it didn't have any impact.

Also, you can change the a mount of "squirt" on the accelerator pump by moving the rod to different holes (some of the settings require you to bend the rod slightly - which is okay according to the manual.)

Dewey
__________________
Always learning...and sharing what I've learned. The Scratch-Built Hot Rod.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-14-2004, 12:00 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
Fast...what engine ? what max RPM does it see ?
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-14-2004, 02:12 AM
killerformula's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Carburetor
Last journal entry: Clean up
Last photo:
Join Date: Oct 2003
Location: Northeast
Age: 34
Posts: 3,485
Wiki Edits: 3

Thanks: 13
Thanked 27 Times in 18 Posts
you always know when somebody got a new edelbrock carb because there is another thread entitled "my new edebrock is bogging!"

Should start naming them "edelbog"

K
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-14-2004, 05:46 AM
New Member
 
Join Date: Jan 2004
Location: Maine
Age: 35
Posts: 27
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Its a H.O. 350 crate engine with a LT4 hotcam roller kit in it. I wrap it up every once in a while to about 6000.

As far as the Edelbog goes i have had my share of trouble with the Holly street avenger that i had also. So i think it just depends on a persons application. Even with the slight bog the Edelbrock has a lot better throttle response than the Holly.

Thanks for the advise, i will try to change those springs with the kit that is on the way. Thanks
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 11-14-2004, 08:50 AM
x007's Avatar
Supercharged T/A
 
Last photo:
Join Date: Sep 2003
Location: Canada
Posts: 277
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I have a edel 750 and great success whit it...

You may have to buy the rod/spring/jet kit for your carb model but after you have tuned it well they rock's !

Btw i will go whit a supercharger this winter and have to get a holley 4150 HP to put on it since the edelb will not handle the presure (not build for that)...


But i like my 750 edelb.. Great carb on my 350sbc 420HP !


ps: if you run an electric pump, do you have a return line to the tank ?
__________________
-= Build for Power =-
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 11-14-2004, 09:18 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
Well, in my opinion, the 670 would have been the better choice out of the 2, actually, Id probably use a Demon 625.
But,regardless, youve got a 750 CFM Holley with a big dead spot.
Try adjusting the accelerator pump, there are 3 positions .
Im bettin it runs OK unless you nail it at low rpm.
You may also want to get a 1 or 2 inch 4 hole spacer, it will increase the signal in the plenum to try to correct for the big carb.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 11-14-2004, 01:29 PM
johnsongrass1's Avatar
Race it, Don't rice it!
 
Last photo:
Join Date: Jul 2002
Location: Columbia, Mo
Age: 37
Posts: 4,080
Wiki Edits: 0

Thanks: 0
Thanked 10 Times in 10 Posts
I hate the fact that Edie carbs don't have adjustable secondary air ram. I''ve ground the wieghts down to change it but's it very time consuming and if you go to far...
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 11-14-2004, 02:48 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
Quote:
Originally posted by stepside454
Well, in my opinion, the 670 would have been the better choice out of the 2, actually, Id probably use a Demon 625.
But,regardless, youve got a 750 CFM Holley with a big dead spot.
Try adjusting the accelerator pump, there are 3 positions .
Im bettin it runs OK unless you nail it at low rpm.
You may also want to get a 1 or 2 inch 4 hole spacer, it will increase the signal in the plenum to try to correct for the big carb.
oops..I ment 750 Edelbrock
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 11-14-2004, 05:37 PM
Member
 
Join Date: May 2004
Location: New York City
Posts: 51
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
bog

Is your edelbrock/carter a ABS or AVS ? the later has a more tunable secondery air valve.
On the ABS unit you mite try changing the angle between the weights and the air flaps.
The lower down the weights are the more easyly the air valve will tip in.
If you can get the air flaps above the seconderys to tip in later the "bog" should go away.
If you try to cover the bog by ajusting jets,rods & springs you'ii probley end up being fat on the primary side to compensate for going lean (to much air valve opening) on the secondry side.
__________________
LeGerra Machine

Last edited by SnakePliscan; 11-14-2004 at 05:43 PM.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 11-16-2004, 08:11 AM
New Member
 
Join Date: Jan 2004
Location: Maine
Age: 35
Posts: 27
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for all of the advise. As far as keeping the 670 holly, the edelbrock has way better response than the holly.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 11-16-2004, 09:42 AM
1980 Malibu's Avatar
Member
 
Join Date: Jul 2003
Age: 29
Posts: 121
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally posted by killerformula
you always know when somebody got a new edelbrock carb because there is another thread entitled "my new edebrock is bogging!"

Should start naming them "edelbog"

K
when i got my new Edelbrock carb it dident bog.....Now it does lol, i guessing bcz its been throught 3 hurricanes wit h no hood
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 11-16-2004, 10:35 AM
killerformula's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Carburetor
Last journal entry: Clean up
Last photo:
Join Date: Oct 2003
Location: Northeast
Age: 34
Posts: 3,485
Wiki Edits: 3

Thanks: 13
Thanked 27 Times in 18 Posts
Holleys are much more tunable than edelbrocks. I went from a 600 ed to a 750 holley and I got better response, even with a bigger carb! Its all in the adjustment...

K
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 11:41 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.