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when does the four barrel kick in?
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Swatkinz View Drop Down
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    Posted: May-10-2011 at 12:39am
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
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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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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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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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Originally posted by malibud malibud wrote:

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



sure it will, you'll be heading to the gas dock faster!
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86BFN View Drop Down
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Originally posted by malibud malibud wrote:

Watch ya think will I feel a difference if secondaries open faster

At the Gas Pump you'll feel a difference!   
👣 Steve
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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 View Drop Down
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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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anyone remember the old qaudraboggs on cars? cool sound
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Originally posted by eric lavine eric lavine wrote:

anyone remember the old qaudraboggs on cars? cool sound


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
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Riley View Drop Down
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Originally posted by 81nautique 81nautique wrote:

Originally posted by eric lavine eric lavine wrote:

anyone remember the old qaudraboggs on cars? cool sound


Yeah Baby, they sounded even better when you flipped over the top of the air cleaner.   


I had a '71 Olds with a Rocket 350 that I ran like that.
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81nautique View Drop Down
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Originally posted by Riley Riley wrote:

Originally posted by 81nautique 81nautique wrote:

Originally posted by eric lavine eric lavine wrote:

anyone remember the old qaudraboggs on cars? cool sound


Yeah Baby, they sounded even better when you flipped over the top of the air cleaner.   


I had a '71 Olds with a Rocket 350 that I ran like that.


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
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