New Setup pics
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From: F' Reno I live in Sparks
thanks for the complements. Yes the noids got moved, they hit the valve cover so i switched sides. I took the T/A out tonight and smoked a modded fox body 5.0. Just got to adjust the carb, got a bad off idle stumble.
Originally Posted by cyipher
Let me know what you think...Also I made that wot switch bracket, turned out good I think.


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From: F' Reno I live in Sparks
That Intake is the weiand action plus for vortec heads...Do you know alot about tuning holley double pumpers? I bought the carb slightly big so when i go 383 next rebuild i wouldnt have to buy another. Right now I'm pushing 330 rated hp at the crank, and have a bad off idle stumble. I was going to try lowering the squirter size for the accelerator pump and drop 4 jet sizes to correct fo the bigger carb and altuitude 5000ft ASL. Do you have any recomendations for tuning???
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From: Wichita Falls, TX
Check and see if the stumble is too much fuel or not enough.. Alot of timing those squirters are set a little loose from the factory. Mkae sure you have your vacuum advance on the port vaccum not venturi vacuum that can cause all type of problems.
WIth an adjustable curve dist. and adjustable just give your self a little more timing on the low end and leave your high end alone. That helps a bunch in the off idle and curse mode where there is no load on the engine.
Ricky
WIth an adjustable curve dist. and adjustable just give your self a little more timing on the low end and leave your high end alone. That helps a bunch in the off idle and curse mode where there is no load on the engine.
Ricky
Originally Posted by cyipher
That Intake is the weiand action plus for vortec heads...Do you know alot about tuning holley double pumpers? I bought the carb slightly big so when i go 383 next rebuild i wouldnt have to buy another. Right now I'm pushing 330 rated hp at the crank, and have a bad off idle stumble. I was going to try lowering the squirter size for the accelerator pump and drop 4 jet sizes to correct fo the bigger carb and altuitude 5000ft ASL. Do you have any recomendations for tuning???
On the tuning, I think you guys are on track with jetting down and adjusting the accel pumps. this is often the case on a carb that's to big (you have a reason though) and I have made this mistake a few times. I know holley used to have a very good tech line, with some guys that really know there stuff. I used to use them to help set-up TM-1 dual-quad tunnel rams on various size engines and they usually had a correct starting point. good luck.
Robert
Robert
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From: F' Reno I live in Sparks
Found this online and seems to be dead on...I jump from a 28 to a 31 nozzel and its much better, Im picking up a 32 and a 35 later on today...
Double pump mechanical secondary
carburetors initially depend
only on the accelerator pumps to provide
adequate fuel until enough air
flow can be
established to begin pulling in the
main system. The larger the carburetor
the higher the air flow required to
accomplish this. If the carburetor is
too large, the pump shot will be consumed
before the main system starts.
The result is a “bog” or a “sag”.
Double pump mechanical secondary
carburetors initially depend
only on the accelerator pumps to provide
adequate fuel until enough air
flow can be
established to begin pulling in the
main system. The larger the carburetor
the higher the air flow required to
accomplish this. If the carburetor is
too large, the pump shot will be consumed
before the main system starts.
The result is a “bog” or a “sag”.






