I have the same adapter. It came with the 4 hole insert and a open insert. That 4 hole insert is JUNK. Very restrictive. Went from spread bore to edelbrock square bore.
From what I'm understanding from the research I've done on it, having the 4 separate holes is supposed to help for low end power. which is what I'm building for, but I'll play around with it. Figure out what I think about it and change my fuel induction setup if need be.
Alright young man . Im not trying to bust yr nuts . Just passing on some advice ! "A" you should NEVER use gasket sealer on your carb to intake . Thers NO reason to brother. Eventually youll end up with a vacuum leak . Now ya got a lean runner on the intake . Now its a burnt valve from the lean runner ! Thers a reason engine builders DON'T use gasket sealer ther . "B" you can put a square bore carb on a spread bore intake . The intake is bigger than the square bore carb . No problem ! But , depending on the square bore carb . The base plate of the square bore carb will BARELY cover the spread bore part of the intake . Watch for vacuum leaks that direction ! But your going the other way . Spread bore carb on a square bore intake . So look at how big the secondaries are on that q jet . Look at how small the opening is on the square bore intake compared to how big the secondaries are on the q jet . So when you go spread bore carb on a square bore intake . Your trying to force a pop can size opening (the spread bore . Threw a square bore opening the size of a c battery . Yah you can do it . But its not right . Its applied to the engine different . Yes over all it ll flow close to the same cfm as the square bore intake . But its applied different . Your taking the air/fuel mixture from the q jet thats dialed in for X amount of air to X amout of fuel for the spread bore . And taking air away by stuffing it through a hole thats 35% smaller than what the carb is designed for ! So your killing the full potential of the q jet by limiting it on a square bore intake . You can square bore to spread bore intake . But yr kickin your self in the nuts goin spread bore to square bore intake ! Ive ran Q jets for 44 years now . I tried what you ve done when i was mid 20s . Totally killed the spread bore affect on the engine . When dialed in right the spread bore q jet on a spread bore intake when floored at 25 mph in first . Will snap your tires right up instant rubber ! Ive done it to my engines and 40 plus others for other ppl since the late 70s . I got some good q jet videos on my channel if you want . How to hang the needle in a q jet seat the right way . How to do secondary metering well plugs . What to look for on used or new q jet carbs . Im the guy in my crowd that for 40 years has killed my holley buddies with a q jet . Im knowin for being the q jet guy . Like i said . NO disrespect intended ! Im 60 . Ran q jets my whole life ! Awesome carburetor ! Just passing on knowledge . 🧐
I have the same adapter. It came with the 4 hole insert and a open insert. That 4 hole insert is JUNK. Very restrictive. Went from spread bore to edelbrock square bore.
From what I'm understanding from the research I've done on it, having the 4 separate holes is supposed to help for low end power. which is what I'm building for, but I'll play around with it. Figure out what I think about it and change my fuel induction setup if need be.
Alright young man . Im not trying to bust yr nuts . Just passing on some advice !
"A" you should NEVER use gasket sealer on your carb to intake . Thers NO reason to brother. Eventually youll end up with a vacuum leak . Now ya got a lean runner on the intake . Now its a burnt valve from the lean runner ! Thers a reason engine builders DON'T use gasket sealer ther .
"B" you can put a square bore carb on a spread bore intake . The intake is bigger than the square bore carb . No problem ! But , depending on the square bore carb . The base plate of the square bore carb will BARELY cover the spread bore part of the intake . Watch for vacuum leaks that direction ! But your going the other way . Spread bore carb on a square bore intake . So look at how big the secondaries are on that q jet . Look at how small the opening is on the square bore intake compared to how big the secondaries are on the q jet . So when you go spread bore carb on a square bore intake . Your trying to force a pop can size opening (the spread bore . Threw a square bore opening the size of a c battery . Yah you can do it . But its not right . Its applied to the engine different . Yes over all it ll flow close to the same cfm as the square bore intake . But its applied different . Your taking the air/fuel mixture from the q jet thats dialed in for X amount of air
to X amout of fuel for the spread bore . And taking air away by stuffing it through a hole thats 35% smaller than what the carb is designed for ! So your killing the full potential of the q jet by limiting it on a square bore intake . You can square bore to spread bore intake . But yr kickin your self in the nuts goin spread bore to square bore intake ! Ive ran Q jets for 44 years now . I tried what you ve done when i was mid 20s . Totally killed the spread bore affect on the engine . When dialed in right the spread bore q jet on a spread bore intake when floored at 25 mph in first . Will snap your tires right up instant rubber ! Ive done it to my engines and 40 plus others for other ppl since the late 70s . I got some good q jet videos on my channel if you want . How to hang the needle in a q jet seat the right way .
How to do secondary metering well plugs . What to look for on used or new q jet carbs . Im the guy in my crowd that for 40 years has killed my holley buddies with a q jet . Im knowin for being the q jet guy . Like i said . NO disrespect intended ! Im 60 . Ran q jets my whole life ! Awesome carburetor ! Just passing on knowledge . 🧐