when does the four barrel kick in?
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=21658
Printed Date: September-26-2024 at 6:09pm
Topic: when does the four barrel kick in?
Posted By: Swatkinz
Subject: when does the four barrel kick in?
Date Posted: May-10-2011 at 12:39am
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As I increase the throttle at a steady somewhat brisk pace, there is a noticeable increase in acceleration at approximately 38mph....an extra oomph. is this when the 4 barrel kicks in? Should it feel obvious? Mine does. Is this the only time they would kick in? Is it related to RPM, load, what? A question demonstrating my ignorance I guess, but I've been wondering. ------------- Steve 2011 Sport/Air 200 Excalibur 343 2017 Boatmate Tandem Axle Trailer Former CC owner (77, 80, 95, 88, all SNs) Former Malibu owner (07, 09) |
Replies:
Posted By: GottaSki
Date Posted: May-10-2011 at 1:34am
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Yes 36to 38 is typical, and opens somewhat slowly at a set cfm via venturi vacuum working against the diaphragm return spring. ------------- "There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole |
Posted By: Hawktique
Date Posted: May-10-2011 at 6:26pm
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You can also get a spring kit to adjust when the secondaries to open sooner/later to fine tune your application. ------------- "A Veteran is someone who at one point in his life, wrote a blank check made payable to: 'The United States of America,' for an amount of 'up to, and including his life." Semper Fi |
Posted By: malibud
Date Posted: May-10-2011 at 7:58pm
| I saw one that you can adjust from the outside without opening it up, 40$ Worth it? Watch ya think will I feel a difference if secondaries open faster |
Posted By: Luchog
Date Posted: May-10-2011 at 9:38pm
sure it will, you'll be heading to the gas dock faster! ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=2095" rel="nofollow - 1980 Ski Nautique Commander 351W |
malibud wrote:Posted By: 86BFN
Date Posted: May-10-2011 at 9:55pm
At the Gas Pump you'll feel a difference!  ------------- 👣 Steve http://www.correctcraftfan.com/diaries/details.asp?ID=4057&sort=&pagenum=1&yrstart=1986&yrend=1986" rel="nofollow - 86 Barefoot Nautique 89 Martinique Former Owner: 93 Hydrodyne 350 MAG |
Posted By: Bri892001
Date Posted: May-11-2011 at 12:37pm
| Also, it's my understanding that you could feel a bog if the secondaries opened too soon, right? |
Posted By: Hawktique
Date Posted: May-11-2011 at 2:07pm
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Yes, you can't just add more fuel and get more power. The spring kits are just to fine tune the secondaries. I would imagine that with head, cam, exhaust changes, some tuning could make the engine run smoother. ------------- "A Veteran is someone who at one point in his life, wrote a blank check made payable to: 'The United States of America,' for an amount of 'up to, and including his life." Semper Fi |
Posted By: eric lavine
Date Posted: May-12-2011 at 9:54am
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anyone remember the old qaudraboggs on cars? cool sound ------------- "the things you own will start to own you" |
Posted By: 81nautique
Date Posted: May-12-2011 at 10:19am
Yeah Baby, they sounded even better when you flipped over the top of the air cleaner.  ------------- You can’t change the wind but you can adjust your sails |
Posted By: Riley
Date Posted: May-12-2011 at 11:24am
I had a '71 Olds with a Rocket 350 that I ran like that. ------------- |
Posted By: 81nautique
Date Posted: May-12-2011 at 11:49am
yep, Olds Delta 88 with the rocket 350, you could power brake the tires off of that thing, pedal the throttle and it sounded like a train horn.LOL ------------- You can’t change the wind but you can adjust your sails |