New Setup pics
Thread Starter
11 Second Club
iTrader: (1)
Joined: Apr 2004
Posts: 590
Likes: 1
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.
Trending Topics
Thread Starter
11 Second Club
iTrader: (1)
Joined: Apr 2004
Posts: 590
Likes: 1
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???
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Closed ex-Sponsor Account
iTrader: (1)
Joined: Jul 2004
Posts: 2,797
Likes: 0
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
Thread Starter
11 Second Club
iTrader: (1)
Joined: Apr 2004
Posts: 590
Likes: 1
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”.
