carb questions, Strombergs & Holleys

[A/Fuel]

i'm thinking out loud here. :
on a Stromberg 97, what are the low speed jets compared to what a Holley has? and say i wanted to put more fuel in a Holley at idle, could i just restrict the idle bleed air holes? or even plug them off. besides being pig rich (for gas) would it still pull fuel to the boosters if i were to plug the high speed air bleeds?
and, what are dump tubes?
i'm trying to convert some stromberg stuff over to a Holley, but i've never touched a stromberg, let alone have any idea how they work.(except for some old magazine articals)
what would the CFM rating be on a single 97?
i know this sounds stupid, but there is a method to all this madness.
thanks,

[Brian Lohnes]

Re: carb questions, Strombergs & Holleys

97's flow about 150 cfm according to the guy I just called and asked who knows stuff like this.

On the other stuff....ummm sorry I dunno.

Brian

[A/Fuel]

Re: carb questions, Strombergs & Holleys

thanks man, thats ok. 150cfm huh....
tried to start it yesterday on 94% and it reved to the moon, only way i could get it to idle was to cover the top of the carb with my hands. then after i realized what i was doing, i got scared and quit.

i'm thinking dump tubes go from the float bowl to the booster?

[Brian Lohnes]

Re: carb questions, Strombergs & Holleys

You're spilling the beans on this batshit crazy project?

Here's some info that may be good.

Brian

[A/Fuel]

Re: carb questions, Strombergs & Holleys

well not yet, i can't really spill any beans if i can't get it to work.
there are still some more things to try, but i'm at the end of my know-how. i can't drill too much more cause there is nothing left. it might be something as simple as a restrictor plate that goes on the top of the carb though. kinda like a choke. i'm not giving up, but i've only 1 1/2 gallons left and i want to use it wisely.
nitro+mufflers= :o

[Ron Ward]

Re: carb questions, Strombergs & Holleys

I think I will grab a big bucket of popcorn and see where this one goes....

[N20Silverado]

Re: carb questions, Strombergs & Holleys

I think I will grab a big bucket of popcorn and see where this one goes....

Make some extra for me too. I ain't going anywhere.

Extra salt please. ;D

Tim

[A/Fuel]

Re: carb questions, Strombergs & Holleys

another question, this time about holley discharge nozzles.
am i correct in saying that the size of each hole is the same as the number stamped?
so the area of a .040 discharge nozzle is .00125 on both sides, not .000625 per side?

[Brian Lohnes]

Re: carb questions, Strombergs & Holleys

Scott, you are correct. Let's say it's stamped "35" that means .035.

Brian

[Brian Lohnes]

Re: carb questions, Strombergs & Holleys

You're spilling the beans on this batshit crazy project?

Here's some info that may be good.

Brian

DOH....forgot to put the link in.

http://www.streetrodderweb.com/tech/0804sr_stromberg_97_carburetor/index.html

Brian

[A/Fuel]

Re: carb questions, Strombergs & Holleys

Scott, you are correct. Let's say it's stamped "35" that means .035.

Brian

i'm looking for a .073, and i'm pretty sure thet there isn't one. a .073 has an area of .004185.....so that's the total area for each hole, not both right? i have a 5/64 bit witch is about .072 that will probably work fine.

[Huskinhano]

Re: carb questions, Strombergs & Holleys

Not sure where you're going with this. Something to check out before you get too far. I recall reading years ago one reason why they'd run 6-8 Strombergs on a V8 was because of the needle valves. Apparently they have very small needle/seats and they are the restriction, not the CFM. They physically couldn't flow enough fuel through the needle valves without that many carbs. I don't know if it' true but worth looking into.

[Brian Lohnes]

Re: carb questions, Strombergs & Holleys

Good advice Husk!

Scott, you thought of that yet?

Brian

[A/Fuel]

Re: carb questions, Strombergs & Holleys

everything on a carb is backwards. you get to a point where you can't flow enough fuel, and then you have to start lowering the percentages. i bet you could get a nitro engine to run under water, if you could get enough fuel in it.

[Shawn Anderson]

Re: carb questions, Strombergs & Holleys

everything on a carb is backwards. you get to a point where you can't flow enough fuel, and then you have to start lowering the percentages. i bet you could get a nitro engine to run under water, if you could get enough fuel in it.

That maybe the coolest quote of all time