Tube-type shooters

[In-Tech]

Sean has a spring loaded machined shooter screw that stops all the pullover. You'll have to call and see if he will sell it to you. It's not on the website that I have seen. I usually order them 10 at a time for inventory on the occasional problems. He's an incredibly good guy and to me, the king of electronic Quadrajets, separate conversation.
https://www.smicarburetor.com/

[rgalajda]

Sean has a spring loaded machined shooter screw that stops all the pullover. You'll have to call and see if he will sell it to you. It's not on the website that I have seen. I usually order them 10 at a time for inventory on the occasional problems. He's an incredibly good guy and to me, the king of electronic Quadrajets, separate conversation.
https://www.smicarburetor.com/

Are you saying that you have had problems with " pullover " ? If so can you elaborate how you determined this and with which style of discharge nozzle? Does venturi size come into play ? I assume it is only at higher rpm.

[In-Tech]

Sean has a spring loaded machined shooter screw that stops all the pullover. You'll have to call and see if he will sell it to you. It's not on the website that I have seen. I usually order them 10 at a time for inventory on the occasional problems. He's an incredibly good guy and to me, the king of electronic Quadrajets, separate conversation.
https://www.smicarburetor.com/

Are you saying that you have had problems with " pullover " ? If so can you elaborate how you determined this and with which style of discharge nozzle? Does venturi size come into play ? I assume it is only at higher rpm.

Hiya,
I first noticed all of this from a visual point looking down to see how different circuits would "come in"

I'd love to spend a multi level document explaining what I have noticed.

Test Test Test to know for sure. That is ONE affect, think about cross-secconial area with all of the air bleeds in the main body and the angle of the entry point.

https://www.princeton.edu/~asmits/Bicyc ... oulli.html

[Tom68]

That sounds like a ridiculous answer to a non problem.

Say what now ? If you aren't getting pull over you don't have a problem to fix, it does happen with some combos, it doesn't necessarily need high load and airflow, Ive recently witnessed it with two witnesses free revving a pissant Flathead.

I think a spring loaded needle valve would be an excellent fix, failing that, a weighted needle would be better than pissing fuel down the venturis.

[Warp Speed]

Accel pump pull over is best addressed by repositioning the pump circuit bleed from the pump well in the bowl to the metering block above the fuel level.

[ArizonaGuy]

Good stuff fellas. Thanks as always

[Walter R. Malik]

"Drill the center of the needle and add some lead ... or make some from mallory."

That sounds like a ridiculous answer to a non problem.

It was an answer to your ridiculous question so, it surely must have been ridiculous ... LOL.

[In-Tech]

Accel pump pull over is best addressed by repositioning the pump circuit bleed from the pump well in the bowl to the metering block above the fuel level.

yes, forgot to mention, a small air bleed drilled in the AE of the metering block will fix most pullover problems.

[rgalajda]

I see these on little Holley 80457s, but I usually don’t see them on bigger bore Holley carburetors. Why is that?

The original question referred to holley 4 barrel carburetors, in particular 80457 holley which is a 600 cfm holley.

I answered the question in the first line of my post stating they would not have been original to the carb. I then explained the 3 types of discharge nozzles .

The subject was 4 barrel holley carburetors , so if you were having problems with pull over using tube type discharge nozzles ,the obvious answer would be , don't use them. They didn't install them at the factory .

If you you want to talk about other styles of holley carbs or situations , then make that clear.
And don't misquote me as happened in your last post .

[ArizonaGuy]

I see these on little Holley 80457s, but I usually don’t see them on bigger bore Holley carburetors. Why is that?

If you you want to talk about other styles of holley carbs or situations , then make that clear.
And don't misquote me as happened in your last post .

I didn’t quote you. I’m going to let that^ slide as a simple mistake.