Secondaries Won't Open on Holley
Thread Starter
|
Elder User
Joined: Feb 2003
Posts: 871
Likes: 0
From: Coleman, Wisconsin
Secondaries Won't Open on Holley
I put a new Holley 600, vacuum secondaries, on my Windsor a few days ago and I got it running good. (bigger jets, fixed the gas leak.) But the secondaries are not opening. I need some advice on what to look for. I don't have much experience working on carbs so I could a little help. Thanks!
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
You won't see them open. They only open when you're driving and putting the engine under a load. If you're just reving the engine in neutral or park, there is no load on the engine and they won't open.
Post Fiend
Joined: Oct 2003
Posts: 9,176
Likes: 4
From: Western Central NV
You may need to buy a quick change secondary spring kit. Which allows you to tune your secondary opening time. The kit & springs come with instructions on how to tune. What fmc400 said is true. They only open under load.
Thread Starter
|
Elder User
Joined: Feb 2003
Posts: 871
Likes: 0
From: Coleman, Wisconsin
Would I be able to notice when the open by how the truck acts? I used to have a Holley on a 300 and when the barrels kicked in it felt like the truck would downshift. Not sure if they're suppose to do that though.
!["Beemer Nut"'s Avatar](data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 50 50'><circle class='avatar-circle-default' fill='%23bc5285' cx='25px' cy='25px' r='20px'></circle><text class='avatar-text-default' x='49%' y='53%' fill='white' text-anchor='middle' alignment-baseline='middle'>"</text></svg>)
Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
Make a small wire clip or use a hairpin and place it on the vacuum secondary plunger rod up against the casting so that it can slide on the rod when the rod is pulled up. Do a heavy throttle road test then check to see if the clip has been moved down due to the vacuum plunger pulling the secondaries open. You checked the diaphragm for leaks or a tear?
Moderator
Joined: Dec 2001
Posts: 22,436
Likes: 17
From: Louisville,Ky.
You may need a lighter spring. They usually come with the heavy black spring. Get the Holley spring kit and try the natural one. Usually you can feel them open around 3500rpm.
It is kinda gradual though.
It is kinda gradual though.
Post Fiend
Joined: Dec 2003
Posts: 6,658
Likes: 4
From: "Islander"
Originally Posted by LxMan1
You may need a lighter spring. They usually come with the heavy black spring. Get the Holley spring kit and try the natural one. Usually you can feel them open around 3500rpm.
It is kinda gradual though.
It is kinda gradual though.
Holley you should not feel the secondaries just a smooth transition.
Thread
Thread Starter
Forum
Replies
Last Post
quakerj
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
1
Dec 5, 2014 10:37 AM
quakerj
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
20
Nov 17, 2013 11:02 AM
crazyeddie
Fuel Injection, Carburetion & Fuel System
9
Aug 5, 2010 09:35 PM
shakor
Performance & General Engine Building
6
Nov 1, 2002 02:43 PM
