Transition circuit on Holley 4160 too lean. - 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 02-17-2013, 07:57 AM
Registered User
 
Last photo:
Join Date: Dec 2012
Posts: 9
Wiki Edits: 0

Thanks: 2
Thanked 0 Times in 0 Posts
Transition circuit on Holley 4160 too lean.

Hi All,
I recently upgraded to 2.5 in exhaust pipe size on my chevy 350 and found that it leaned the A/F ratio. My carb is the 80457-2 it does not have adjustable Idle air bleeds or Idle feed restrictors. Here are my current numbers with a wideband mounted to the drivers header.

Idle - 13.5:1
Off idle to 2.5k - 14.7-17.5 There is no popping or anything, just that I see it go lean.
2.5k+ -13.5:1
WOT - 12.7-13.1

I am okay with 13.5 i think. My worry is in the off idle at low speeds, say 40-50 mph, depending on the load it will go way lean until I get to the main jets around 2500 rpms.

Is my best option to buy an adjustable metering block and if so, what are you guys using?
I saw this one from QuickFuel 34-8. Looks like it has adjustable IFR and powervalve restrictors too. Anybody use one of these?
Thanks!

    Advertisement
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:
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:
Insurance
Please select your insurance company (Optional)

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
Holley Model 4160 zfuel Engine 24 01-29-2012 08:44 AM
Holley 4160 carb dedwards Engine 2 07-15-2011 04:55 PM
help with holley 4160 sam_bo3 Engine 2 03-11-2009 06:10 AM
Holley idle circuit baddbob Engine 2 08-19-2007 07:43 AM
Powdercoating a Holley 4160 rick458 Engine 6 03-21-2005 01:26 PM


All times are GMT -6. The time now is 09:06 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.