when does the four barrel kick in? |
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Swatkinz
Platinum Member Joined: December-03-2003 Location: Lexington, SC Status: Offline Points: 1307 |
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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.
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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) |
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GottaSki
Grand Poobah Joined: April-21-2005 Location: NE CT Status: Offline Points: 3357 |
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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.
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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Hawktique
Senior Member Joined: June-27-2009 Location: Iowa Status: Offline Points: 456 |
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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.
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"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
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malibud
Gold Member Joined: July-08-2009 Location: north carolina Status: Offline Points: 613 |
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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
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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sure it will, you'll be heading to the gas dock faster! |
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86BFN
Gold Member Joined: July-28-2008 Location: Indiana Status: Offline Points: 882 |
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At the Gas Pump you'll feel a difference! |
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Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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Also, it's my understanding that you could feel a bog if the secondaries opened too soon, right?
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Hawktique
Senior Member Joined: June-27-2009 Location: Iowa Status: Offline Points: 456 |
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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.
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"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
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eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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anyone remember the old qaudraboggs on cars? cool sound
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"the things you own will start to own you"
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81nautique
Grand Poobah Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5778 |
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Yeah Baby, they sounded even better when you flipped over the top of the air cleaner. |
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You can’t change the wind but you can adjust your sails
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Riley
Grand Poobah Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7953 |
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I had a '71 Olds with a Rocket 350 that I ran like that. |
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81nautique
Grand Poobah Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5778 |
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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 |
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You can’t change the wind but you can adjust your sails
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