so i just installed a secondhand holler with the racing dual duel bowls correct fixed all the leaks it had smacked it on tuned it accordingly to my application but now when i step on the gas it sputters up so i can only accelerate when i lightly press on the gas any idea whats going on here?

 

Accelerator pump not shooting fuel. With the air filter off and engine off, blip the throttle and see if the shooter sprays

 

do you have a pressure regulator?

 

Did u use new gaskets?

 

What is the list # on your carb?

 

the jets all spray correctly and yes i do have a pressure regulator what psi should i be running with the holley? and ill get the carb number tom

 

So the squirters shoot fuel when u blip the throttle for certain. 5.5-6.5 psi

 

U could be too lean, possible wrong power valve too. Are u running an open spacer?

 

Bottom line is if you are serious about tuning any carb, get a wide band and a afr meter to determine if your rich or lean and go from there...your carb problem posts will become much more specific as well as the answers to them since you have some data to back up your problems...otherwise you are just pissin' in the dark...good luck Denser, I know this car is a driver for you and problems become frustating quickly.

 

True, however without a wideband there is still some basic guidance and knowledge that will help.

While I do use a wideband, old guys like didn't have this gift so many years ago.

Back in the day feel from the seat of your pants and pedal along with plug reading went a long way.

 

Agreed...I'm one of those guys...but remember...a lot of those guys cars drove like ****...lol. They just wouldnt tell you any different...a lean stumble feels very much like a rich stumble, but only smells different...lol, and true the plugs will tell you which is which. But as long as people want to put 600 cfm carbs on stock port 12a's...why should we struggle? All the info is there...stock 12a's get a 465...street port 13b's ...a 600etc... Are we the only ones that read the old racing beat catalogs? Let the wide band inform and go from there. Nothing else will be as smooth as a stock nikki or fuel injection unless they tune and jet the application within an inch of its life. Ask all the guys running weber 48's like j9fd3s on a p-port running smooth as silk.

 

Carb tuning is an art. Funny having some kids looking at the contents of a carb kit I was buying asking what it is for.

Personally, for a 12a a Holley 465 or edelbrock 500 are ideal.

I run a modified 650 double pumper on my supercharged supercharged 13b and it does everything flawlessly.

 

the application im using the 600cfm carb for is a 13b street port and it could be possible im running too lean or rich. im not much of a carb tuner still in the process of learning but when the car is off and i blip the throttle all the squirters function and shoot fuel checked my pressure regelator and running at 5.5 psi checked the fuel pump and it seems like it could be possition a little better theres a pinch in the line so enough fuel might not be pumping at full throtle so im going to try to reposition it in my engine bay or should i just buy some fuel lines and extend the line to clear the pinch?

 

also after i tuned it i got it to idle at about 1k and could hear the streetport but if i let it sit for about 4 to 5 mins it would start to die out and unless i hit the accelarator woiuld die out completely

 

im actually running 7psi

 

cfamily now that you mention it this morning when i drove to work there was an odd order as i drove off i thought it was from outside but i think it was emitting from my car

 

I need the list number, and "actual" jetting that you are running. Are you running a spacer??
To clear the idle and help with cruise back the idle adjustment screws out a 1/4 turn at a time to see if it clears. Your holley will like to idle rich, and when cruising you may be having an issue transitioning from idle to main jetting in the carb.

 

only number i found is 6r3760 theres no choke tower on this carb and apparently it is a 650cfm i readjusted my psi to 6psi and readjusted my idle to about 14. she idles fine but if i drop the idle any lower than that she dies out theres a little smoke when she idles

 

and yes im running a spacer

 

I think anything above 1k is out of the idle circuit...so 84stock is correct. You might have to find out the jets you are running and make corrections so you can idle at a more reasonable rpm...sounds like you are almost there

 

need pictures of the carb then....and what jetting and power valve you are running...

back off the idle on your secondaries....there is a tiny screw on the passenger side of the carb, you will see the throttle stop on it

 

i believe the original owner might have put slighter bigger jets seeing as he was setting it up for a turbo application might be the cause of all the issues, when i step on the throttle it almost sounds like a rev limiter

 

Use a tiny flat screw driver bit and a tiny wrench to turn it and get in from underneath

 

for pictures of the carb go to the for sale section on the first gen and should just say holley for turbo or something among those lines as far as the list number cant seem to find it for the life of me

 

and the secondary idle screw is praticly all the way unscrewed if i screw it more the car dies out