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Discussion Starter · #1 ·
This weekend I got to take my street car to one of our biggest Street Machine shows on the local area. I have stated before I purchased a few FST carburetors and this it the first real road test on the FST 650 DP carb. Starting the engine was with no trouble and I do not even have to use the choke it ran so good. The idle is so smooth even though I do not need a 4 corner model, the floats and jetting were perfect and I can light the tires up in first gear like nothing. Now get this, the car only used 1/8 of a tank each way there and back. I take every new carb I get apart and there was no debris or junk in the bowls and everything was pretty nice. The price on this is $379 not a bad deal for the money. Over all impression on this one? it's a keeper for me.

 

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Discussion Starter · #3 ·
Glad you like your New FST Street Carb

I am looking at the Street Demon Demon Carburetion 1904: 750 cfm Street Demon Carburetor 1-11/16" Primary Throttle Bores | JEGS $ 403.us
as it is a Modern Version of a Quadra Jet Carb
Two Smaller Barrels up Front for when you are Cruzin for better Gas Mileage
and the Two Bigger Barrels in the Back for when you want to Go Go
Those are pretty nice also. I was talking with a guy who had 2 on a dual quad low rise setup and was quite happy with them.
 

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Glad you like your New FST Street Carb

I am looking at the Street Demon Demon Carburetion 1904: 750 cfm Street Demon Carburetor 1-11/16" Primary Throttle Bores | JEGS $ 403.us
as it is a Modern Version of a Quadra Jet Carb
Two Smaller Barrels up Front for when you are Cruzin for better Gas Mileage
and the Two Bigger Barrels in the Back for when you want to Go Go
It's a pretty'd up rehash of a Carter Thermo-Quad, not a Q-jet.
Even has the same phenolic composite main body like the Thermo-Quad did. Same layout of all the basic parts.
Thermo-Quad just never had that "goggle valve".

Mopar guys seem to love the Thermo-Quad's

That secondary blade makes me think of my old Holley Three Barrels.
 

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It's a pretty'd up rehash of a Carter Thermo-Quad, not a Q-jet.
Even has the same phenolic composite main body like the Thermo-Quad did. Same layout of all the basic parts.
Thermo-Quad just never had that "goggle valve".

Mopar guys seem to love the Thermo-Quad's

That secondary blade makes me think of my old Holley Three Barrels.
True ; I love the design features of the Street Demon 750. I wish they made it in a 850; it would be perfect for a mild 489-502.
 
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This weekend I got to take my street car to one of our biggest Street Machine shows on the local area. I have stated before I purchased a few FST carburetors and this it the first real road test on the FST 650 DP carb. Starting the engine was with no trouble and I do not even have to use the choke it ran so good. The idle is so smooth even though I do not need a 4 corner model, the floats and jetting were perfect and I can light the tires up in first gear like nothing. Now get this, the car only used 1/8 of a tank each way there and back. I take every new carb I get apart and there was no debris or junk in the bowls and everything was pretty nice. The price on this is $379 not a bad deal for the money. Over all impression on this one? it's a keeper for me.

I was looking at them a few weeks ago, and pretty much honed in on buying one if i couldnt get the 750 (which i know is too big) on my 400 to cooperate. The 750 ended up seeing things my way, and cooperating so it lives on. I liked the design where they have plugs in the bowl so you can replace the mains without taking the bowl off. I think i read FST is from the GO EFI guys.
 

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Discussion Starter · #7 ·
I was looking at them a few weeks ago, and pretty much honed in on buying one if i couldnt get the 750 (which i know is too big) on my 400 to cooperate. The 750 ended up seeing things my way, and cooperating so it lives on. I liked the design where they have plugs in the bowl so you can replace the mains without taking the bowl off. I think i read FST is from the GO EFI guys.
Well on that model and other models that is a problem from the FST line, not that the carb is bad but FST is using the hex head jets and they will not fit through the holes in the bowl, I made them aware of that issue. I changed mine over to the Holley jets which do fit through the holes, it the old adage, hex peg does not fit through round hole.
 

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have you had a chance to run the summit 850 carb? seems like a lot of carb for the $!!!
I’m interested in hearing about this as well
 

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I was just lookin on thier site .
No "about us " or anything like that.
I never even heard of em.
What you runnin that 650 on ?
406 ?
Alot of adjustability on that particular one ?
What made ya go for that over a holley ?
 

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Was this on your race gas car?

You took a race car to a show?

What are trying to gain in getting that new carb?
 

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Discussion Starter · #12 ·
Was this on your race gas car?

You took a race car to a show?

What are trying to gain in getting that new carb?
No it was pump fuel, a car show and Driveability was my main concern. The Vortec 350 runs perfect with this FST 650.
 

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Discussion Starter · #13 ·
have you had a chance to run the summit 850 carb? seems like a lot of carb for the $!!!
Not yet as I found the Holey fuel fittings are different than the Summit/FST line of carbs, no biggie I just bought some new ones for the car. It's just to hot for me right now as I hate racing when it's in the 90's.
 

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Discussion Starter · #14 ·
I was just lookin on thier site .
No "about us " or anything like that.
I never even heard of em.
What you runnin that 650 on ?
406 ?
Alot of adjustability on that particular one ?
What made ya go for that over a holley ?
It was on my 350 Vortec street engine. I have 2 more FST's to test along with a Summit 850 and yes their is a lot of adjustability with these carbs. here is the the Summit 850HP, $339 dollars seemed like a good deal to me.
717100
 

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No it was pump fuel, a car show and Driveability was my main concern. The Vortec 350 runs perfect with this FST 650.

Ok, you seem to know more that most here. I guess your were wanting people to make conversation with you. I stay away from that kind of stuff. Hope things work out for you.
 

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It was on my 350 Vortec street engine. I have 2 more FST's to test along with a Summit 850 and yes their is a lot of adjustability with these carbs. here is the the Summit 850HP, $339 dollars seemed like a good deal to me.
View attachment 717100
They sell that summit carb with an anular booster do you know??
Man that's ALOT of carb for that money !
If that thing works as good or near as good as a holley all I can say is BOY DID THEY SEE ME COMIN !! lol
 

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Discussion Starter · #17 ·
They sell that summit carb with an anular booster do you know??
Man that's ALOT of carb for that money !
If that thing works as good or near as good as a holley all I can say is BOY DID THEY SEE ME COMIN !! lol
Have not seen an A/D booster version yet but you can always install some from BLP easy to do.
 
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