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  #46 (permalink)  
Old 03-27-2013, 06:44 PM
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A venturi is a fluid design used to accelerate one fluid group to move another.

You are accelerating the air moved by the piston to pull fuel.

Are we there yet?

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  #47 (permalink)  
Old 03-27-2013, 07:23 PM
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Ill give you some rope to try and hang me.

The signal for the secondary pod on a vacuum secondary carb, takes its metering above the venturi . This is to get a slower delayed signal. This keeps the pod from opening too fast. The signal is slower because it takes more time for the air to go through a size decreasing opening, than the air around it.

Okay, Fbird ...hit me.
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  #48 (permalink)  
Old 03-27-2013, 07:47 PM
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Quote:
Originally Posted by lg1969 View Post
What happen to the manifold vacuum when you floor the gas pedal. It drops to zero or close to it.
more rope- You weren't going to imply the engine does not continue to pull. Just the opposite . The vacuum reading is negative volume yet to be consumed. Wide open it is still pulling , but there is no negative pressure left in a chamber to be read as a vacuum signal.
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  #49 (permalink)  
Old 03-27-2013, 09:23 PM
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Do like , what FBird says, first recurve the distributor, what kind of air breather do you have? that cam would probably work better with a single plane intake, with that 3500 stall torque conveter.what kind of exhaust do you have ? to restrictive could be a problem , get it tuned in right ,it should really haul *****
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Old 03-27-2013, 09:54 PM
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DK, I do not have a question on set up. Are you offering tuning advice? It sounded like you are giving me tuning advice for something I built 20 years ago. I don't have it any more , but the experience of bracket racing taught me a lot.

The grand coupe performed flawlessly and how the jobber catalog suggested. It is a shame summit catalogs don't have the same reciepes section for bracket racing.

Fbird, secondaries do not work on manifold vacuum at all- So I explained how this is false.

Lg, could not verbalize his argument in a coherent manor- So I explained where the downforce comes from and how a venturi uses it.

I cant clear it up any further, without feedback.

If you are going to accuse me of being incorrect, you better be able to explain yourself.
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  #51 (permalink)  
Old 03-28-2013, 01:58 AM
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Quote:
Originally Posted by spinn View Post
DK, I do not have a question on set up. Are you offering tuning advice? It sounded like you are giving me tuning advice for something I built 20 years ago. I don't have it any more , but the experience of bracket racing taught me a lot.
He's obviously giving advice to the OP- else why would he tell you to use a single plane intake w/"that cam" and a "3500 stall torque converter"... when you have a blown engine that you made no mention of cam or stall!

Y'all need to relax. The OP doesn't even have a vacuum secondary carb. So instead of all the back and forth about something irrelevant to the OP, post something that'll help him!
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  #52 (permalink)  
Old 03-28-2013, 06:33 AM
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obviously? I would agree but nothing in this thread has been obvious.

relax?

I am pretty relaxed, and have been. The thread became a "your wrong" thing. Neither responder made clear what their point was. It sounds like they didn't like using manifold vacuum for a indication of idle quality.

There was some confusion and I stayed present. Now it looks like the confusion is gone. I kept it lite and informative.

Peace out from the chief-commander-neutron G.

Last edited by spinn; 03-28-2013 at 06:44 AM.
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Old 03-28-2013, 07:36 AM
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[QUOTE=cobalt327;1661054]He's obviously giving advice to the OP- else why would he tell you to use a single plane intake w/"that cam" and a "3500 stall torque converter"... when you have a blown engine that you made no mention of cam or stall!
QUOTE]

See there is confusion. This is the stuff that needs to get straight. Cob, this is what im talking about.

I stated the 440 that I have experience racing with , used the MP .509 hyd cam. also Had a hi stall and single plane.

The pickup truck in the present, I drive everyday, is supercharged.

I don't think your going off of what I typed anymore.

Last edited by spinn; 03-28-2013 at 07:41 AM.
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  #54 (permalink)  
Old 03-28-2013, 09:35 AM
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Quote:
Originally Posted by lg1969 View Post
I'm gone.....Goodby
This person said I was wrong. Then left for no reason. He did not even explain himself. That is pretty rude.

The forum mod, who has some responsibility here, did not read or interpret correctly. Then for some reason directed negativity towards me.

Fbird has a ton of experience, and from his posts, has a point of view or concept yet to be explained. I am looking forward to his explaination of the carb secondary not requiring vacuum at all to function. Or the venturi thing. If he wants to say it generates vacuum by itself. I don't know, I will put a picture of secondary venturi with a gauge hooked to it, engine off. I guarantee no vacuum. Does it need electricity?

I don't care. My world of high performance machines continues. As things warm up I am hoping to get some good videos to share. My new phone can do pretty good video. I have some piping to do to finish up my turbo charger on the integra. That and the obd interface is pretty fun stuff.
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  #55 (permalink)  
Old 03-30-2013, 10:00 PM
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Ok I got it right 24 initial and 36 total all In bout 3k rpms it's breaks the tires easy now
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  #56 (permalink)  
Old 03-31-2013, 03:38 PM
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U think I should go down on pump size
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