what is my best bet on carburator

Mo65 · 03-31-2001, 05:35 AM

As I probably mentioned before, I have a rebuiled stock 302, stock heads, cam,etc. It is factory 2v, 2 barrel carburator.
The slight modifications I have made is
petronix flame thrower coil
petronix igniter to make eletrock dist
try Y headers
dual exhaust, 2 1/4 super turbo dyno max with balance tube
8mm wires.
Nothing fancy just want the power of an 8 cylinder muscle car.
I am running an aftermarket Holley 450 cfm 2 barrel carb that was shelved for about 5 years. It is the first time I've started the engine after I 've installed exhaust and carb, so I don't really know how the engine should run like with the exhaustsytem and stock intake I have. The carb seems to be sticking, but I am not sure, and it does not idle right on low idle speeds, but at high rpms it runs fine. There is no vacum leaks, timing problems, ignition problems, nor gas problems. I was told by some people that the carb is starving from gas beacuse it needs a bigger carb, like a 500 or 600cfm 4 barrel because of the double exhaust and mild modifications I did. So I was considering changing it to a 4 barrel carb, and obviously changing the intake to a perfomance one. But at the same time not sure if it will correct the problem.
I don't think the 450 cfm is a small carb to make my car idle the way it is.
Even though, I was considering changing it to a 4 barrel whether the problem would or would not be eliminated. Just to have a 4 barrel carb, because most people criticize an eight cylinder engine with a 2 barrel carb. The question, is is it worth changing the 2barrel to 4 barrel with the mild modifications I've done? I donot plan to install a aftermarket competition cam or heads.But I was planning to intall an perfomance intake like the Edelbrok. But at the same time I heard that there is not really A diffrence if a competition cam is not intalled. If I install a 500cfm 2 barrel, or a 500cfm 4 barrel, is there a diffrence in performance. Will I feel a diffrence or the same? I am not really interested in top end speeds but more in low end toque, but at this time I just want my engine to run right once in for all. And spend the least money posible.Can a 4 barrel intake be installed to the heads that were originally for a 2V. As mentioned, the car has now dual exhaust. So I would assume it needs more for intake, as some people speculate . But what CFM carb would I need for my application that has stock heads, stock cam, and all the information I mentioned above? 500 or 600cfms

Please help me if you know the an answer of one of my questions and feel free to answer the question that you might have the anwser to.
And advise me on what I should do.
Thanks

Gearhead999 · 03-31-2001, 05:48 PM

Sounds like your power valve is blown. Take the float bowl off and replace it.

I agree on the 4 brl. Get an Elderbrock 600 cfm. Get an aftermarket manifold, dual plane and bolt it together. It should run fine and you'll have more punch too.

Mo65 · 03-31-2001, 06:20 PM

Today my brother replace the carb, with an old Motorcraft,that we found laying around in the garage. We intalled it and the engine idle perfect. Obviously the problem was the carburator. It's a shame because the carburator was brand new,never used. My brother payed about 200 bucks, about 5 years ago. He never used it because it did not have the smog crap requiremennts for the 79 Ford Faimont he used to have.
The motorcraft that was originall to the car and was used and abused but runs perfect. One thing I learned, is to stay away from Holley brand. I will try Edelrbock carb this time.

Rev · 03-31-2001, 07:10 PM

Moises, don't blame Holly. They've been making performance carbs forever, and they ARE GOOD. What you need for your set up is a dual plane manifold like an Edelbrock Performer or a Weiand Stealth. On top of that put a Holly or a street Demon. You'll want vacumm secondaries and about 600-650 CFM. With a good induction (mild street), you'll be amazed at how well your set up can run. Holly has all the parts to tune your carb any way you want it. This has been true for a long time now.

Rev

------------------
'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.

Power · 03-31-2001, 08:01 PM

My 2 cents...

For ease of use and tuning you can't go wrong with an edelbrock. They have good performance and no major problems(that I know of). The Holley performs slightly better for the same size carb but is much harder to tune and use. I have never really messed with a Demon but have heard nothing but good things about them.

------------------
1966 Baby blue Coupe, 289 w/ man. 3-speed, nothing special but the fact that it is my first mustang. I am a former import guru....no more.

I've never run it except on the street, it has new wheels & tires, new exaust, and that about covers it. Looking to change a lot in the future including engine. Any ideas are appreciated.

j's69stang · 04-01-2001, 01:38 AM

edelbrocks SUCK too i hate mine

69fastback · 04-01-2001, 02:24 AM

I have the edelbrock and wish i would not had bought it. I only bought it becuase it was cheap and a quick fix for my mustang when it was the only car I had. I will defiently be switching to a bigger demon soon.

------------------
69 428 cobra jet: tons of mods.
97 f-150 5.4 xlt mark III
BUCKLE UP. SUCK IT IN.
Objects in the mirror are about to disappear...
QUICKLY!!!!!!

Mo65 · 04-01-2001, 03:50 AM

Now I am confuse whether to purchase a Holley, or an Edelbrock. I guess in a sense it is like comparing a Chevy and a Ford. Or Pioneer with Sony, and probably depends on the model too. A basic model and a top of the line, with a the features that make it perform better, durable quality parts, etc. Similar like comparing a Ford Escort with Ford Mustang.
I have not decided still what to buy and I am sure I can expect bad or good luck from either one depending on the model, and how I use it and abuse it.
I have asked plenty of enthusists on whether Holley or Edelbock, and it seems that Edelbrock has more favorable responses till this moment. Even from profesional carburator rebuilders. They have stated that Holleys have the reputation of sticking after a while of not in use. It is sad to see that my brother paid around $200 for nothing. At this time I am thinking of purchasing the Performer 289-302 (idle-5500) rpms Edelbrock intake manifold and the Performer Series 600 cfm Carb with electric choke.
I like to hear more from disatified consumers of Edelbrok and see if I change my mind again, but I probably doubt it.

Rev · 04-01-2001, 06:30 PM

Moises, I don't have one, but I bet you won't find anyone who has any bad things to say about the Street Demon. That's gonna be my next carb.

Rev

------------------
'66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph
1/4 mi.

03-31-2001, 05:35 AM	#1
Mo65 Registered Member Join Date: Feb 1999 Location: Ontario, California Posts: 43	what is my best bet on carburator As I probably mentioned before, I have a rebuiled stock 302, stock heads, cam,etc. It is factory 2v, 2 barrel carburator. The slight modifications I have made is petronix flame thrower coil petronix igniter to make eletrock dist try Y headers dual exhaust, 2 1/4 super turbo dyno max with balance tube 8mm wires. Nothing fancy just want the power of an 8 cylinder muscle car. I am running an aftermarket Holley 450 cfm 2 barrel carb that was shelved for about 5 years. It is the first time I've started the engine after I 've installed exhaust and carb, so I don't really know how the engine should run like with the exhaustsytem and stock intake I have. The carb seems to be sticking, but I am not sure, and it does not idle right on low idle speeds, but at high rpms it runs fine. There is no vacum leaks, timing problems, ignition problems, nor gas problems. I was told by some people that the carb is starving from gas beacuse it needs a bigger carb, like a 500 or 600cfm 4 barrel because of the double exhaust and mild modifications I did. So I was considering changing it to a 4 barrel carb, and obviously changing the intake to a perfomance one. But at the same time not sure if it will correct the problem. I don't think the 450 cfm is a small carb to make my car idle the way it is. Even though, I was considering changing it to a 4 barrel whether the problem would or would not be eliminated. Just to have a 4 barrel carb, because most people criticize an eight cylinder engine with a 2 barrel carb. The question, is is it worth changing the 2barrel to 4 barrel with the mild modifications I've done? I donot plan to install a aftermarket competition cam or heads.But I was planning to intall an perfomance intake like the Edelbrok. But at the same time I heard that there is not really A diffrence if a competition cam is not intalled. If I install a 500cfm 2 barrel, or a 500cfm 4 barrel, is there a diffrence in performance. Will I feel a diffrence or the same? I am not really interested in top end speeds but more in low end toque, but at this time I just want my engine to run right once in for all. And spend the least money posible.Can a 4 barrel intake be installed to the heads that were originally for a 2V. As mentioned, the car has now dual exhaust. So I would assume it needs more for intake, as some people speculate . But what CFM carb would I need for my application that has stock heads, stock cam, and all the information I mentioned above? 500 or 600cfms Please help me if you know the an answer of one of my questions and feel free to answer the question that you might have the anwser to. And advise me on what I should do. Thanks

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03-31-2001, 05:48 PM	#2
Gearhead999 Registered Member Join Date: Sep 1998 Location: Oviedo, FL Posts: 992	Sounds like your power valve is blown. Take the float bowl off and replace it. I agree on the 4 brl. Get an Elderbrock 600 cfm. Get an aftermarket manifold, dual plane and bolt it together. It should run fine and you'll have more punch too.

03-31-2001, 06:20 PM	#3
Mo65 Registered Member Join Date: Feb 1999 Location: Ontario, California Posts: 43	Today my brother replace the carb, with an old Motorcraft,that we found laying around in the garage. We intalled it and the engine idle perfect. Obviously the problem was the carburator. It's a shame because the carburator was brand new,never used. My brother payed about 200 bucks, about 5 years ago. He never used it because it did not have the smog crap requiremennts for the 79 Ford Faimont he used to have. The motorcraft that was originall to the car and was used and abused but runs perfect. One thing I learned, is to stay away from Holley brand. I will try Edelrbock carb this time.

03-31-2001, 07:10 PM	#4
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Moises, don't blame Holly. They've been making performance carbs forever, and they ARE GOOD. What you need for your set up is a dual plane manifold like an Edelbrock Performer or a Weiand Stealth. On top of that put a Holly or a street Demon. You'll want vacumm secondaries and about 600-650 CFM. With a good induction (mild street), you'll be amazed at how well your set up can run. Holly has all the parts to tune your carb any way you want it. This has been true for a long time now. Rev ------------------ '66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph 1/4 mi.

03-31-2001, 08:01 PM	#5
Power Registered Member Join Date: Feb 2001 Location: Oregon Posts: 420	My 2 cents... For ease of use and tuning you can't go wrong with an edelbrock. They have good performance and no major problems(that I know of). The Holley performs slightly better for the same size carb but is much harder to tune and use. I have never really messed with a Demon but have heard nothing but good things about them. ------------------ 1966 Baby blue Coupe, 289 w/ man. 3-speed, nothing special but the fact that it is my first mustang. I am a former import guru....no more. I've never run it except on the street, it has new wheels & tires, new exaust, and that about covers it. Looking to change a lot in the future including engine. Any ideas are appreciated.

04-01-2001, 01:38 AM	#6
j's69stang Registered Member Join Date: Apr 2000 Posts: 102	edelbrocks SUCK too i hate mine

04-01-2001, 02:24 AM	#7
69fastback IRAQ VET Join Date: Feb 2000 Location: high desert California Posts: 1,480	I have the edelbrock and wish i would not had bought it. I only bought it becuase it was cheap and a quick fix for my mustang when it was the only car I had. I will defiently be switching to a bigger demon soon. ------------------ 69 428 cobra jet: tons of mods. 97 f-150 5.4 xlt mark III BUCKLE UP. SUCK IT IN. Objects in the mirror are about to disappear... QUICKLY!!!!!!

04-01-2001, 03:50 AM	#8
Mo65 Registered Member Join Date: Feb 1999 Location: Ontario, California Posts: 43	Now I am confuse whether to purchase a Holley, or an Edelbrock. I guess in a sense it is like comparing a Chevy and a Ford. Or Pioneer with Sony, and probably depends on the model too. A basic model and a top of the line, with a the features that make it perform better, durable quality parts, etc. Similar like comparing a Ford Escort with Ford Mustang. I have not decided still what to buy and I am sure I can expect bad or good luck from either one depending on the model, and how I use it and abuse it. I have asked plenty of enthusists on whether Holley or Edelbock, and it seems that Edelbrock has more favorable responses till this moment. Even from profesional carburator rebuilders. They have stated that Holleys have the reputation of sticking after a while of not in use. It is sad to see that my brother paid around $200 for nothing. At this time I am thinking of purchasing the Performer 289-302 (idle-5500) rpms Edelbrock intake manifold and the Performer Series 600 cfm Carb with electric choke. I like to hear more from disatified consumers of Edelbrok and see if I change my mind again, but I probably doubt it.

04-01-2001, 06:30 PM	#9
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Moises, I don't have one, but I bet you won't find anyone who has any bad things to say about the Street Demon. That's gonna be my next carb. Rev ------------------ '66 Coupe, 306, 300 HP, C-4, 13.97 e.t., 100.3 mph 1/4 mi.