edelbrock-holley

[frydaddys87]

so i have a edelbrock 650 sitting on top of my motor. my friend gave it to me and swears by it. i havent drove the truck yet but im second guessing the carb. ive never ran one. ive always used a holley. what do you guys think about the two and the pros and cons of them thanks
oh and i for got to say that he has 2 cars in his yard that run good till you punch it at a dead stop. they both have edelbrocks. and they fall on there face.

[sethv]

I'm a quadrajet guy, so I'll compare my Edelbrock 1407 750 cfm to one. Still pretty new to carbs, but this is the best I can do for ya.

Pros: Easy to tune
Easy to rebuild
They look nice when polished up :p

Cons: Ancient technology, not as fine tunable
I personally got less mileage out of my Edelbrock than I did my Q-jet.

My suggestion is to pawn it off and get a good Holley that you like, or a Q-jet. I was pretty much forced to get the Edel as the aluminum intake I put on it was a square bore and I didn't want to run any adapters.

[frydaddys87]

i hear ya. i would love a q jet but i dont know any one to truly tune it. and i know how to tune a holley but my buddie doesnt. i told him i could rework a 750 double and it would run circles around his edelbrock all day. i guess ill have to show him when i get my drive line in

[sethv]

lol yeah. Q-jets and Holleys can be tuned up and run better than any Edelbrock. I had the PO of my truck tune the Q-jet when it was mine because they look intimidating lol. (This was a '78 k10, not the ford in my sig)

[frydaddys87]

hay if you can tune a qjet you can show up every thing els lol

[rcbildr]

I've never ran a holley, but a good friend of mine has. He must have gotten a bad one because it wouldn't stay tuned. He eventually swapped over to an Edelbrock and has been real happy with it. From what I've read once holley's are tuned right, you can get more power than you can with an edelbrock. Edelbrocks are easy to tune and are good for drivability. And nothing beats a properly tuned quadrajet. I just finished rebuilding a quadrajet and now I get to learn how to tune it.
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[frydaddys87]

i know if you get a holley to far off it can be a pain to get it back runnin right. and good luck with the q jet. ive always wanted to lean how to tune them.

[ringger14]

I ran the edelbrock 650 when my truck was a 350. Ive been building mine up to a 383 and since switched to a holley 750. I had zero problems with my edelbrock and it worked pretty good. I base line tuned the edelbrock and thats all I really needed for it to run decent. My Dads always sworn by holley so Im going to give it a shot this time around.

[INSIDIOUS '86]

From my experience a Holley just runs and meter smoother. It's like having an engine with fouled plugs with the edelbrock and a smooth as silk engine with a Holley. Holleys are easy to tune as well. Theres an old saying of you got a qjet you'll be there all month fixing it. If you have edelbrock problems take it off throw it in the trash and get a holley. If your having problems with your Holley take it off throw it on the ground put it back on and it will work just fine.
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[cory d]

i have only driven trucks with q-jets and my truck with a carter(edlbrock/webber) the q-jets were allot smoother. i can feel a huge gaine in power once my secondaries open up. not a terrible thing i guess, its kind of fun. the q-jets also did great with cold starts and driving

[frydaddys87]

lol thats funny. my buddy is tellin me the edelbrock might be to big for my 350 cuz it came off a bbc for mud racing. i told him theres no such thing as to big. if you can turn the jets down to meet amount of fuel needed. the motor will only suck as much air as the stroke and bore can pull. so if you can adjust the fuel to this amount you will have a good ratio to start with. i like how theres more adjustments on a holley. theres not much to do with a edelbrock.

[INSIDIOUS '86]

Originally Posted by cory d

i have only driven trucks with q-jets and my truck with a carter(edlbrock/webber) the q-jets were allot smoother. i can feel a huge gaine in power once my secondaries open up. not a terrible thing i guess, its kind of fun. the q-jets also did great with cold starts and driving

Good power WHEN the HUGE secondary's open up haha.

I had a story about that but my phone keeps closing the browser and now all I have to say is. Quadrabog rot-Chester and stumble and grumble. They always stalled on me and my friend at the first stop after starting and left you trying to frantically restart while hovering sideways in the middle of the road before getting creamed by a car or semi. and we had spent a month refurbishing and tuning these pre smog quadra bogs. Once you had your cold stall of the day they ran great and were awesome for Daily driving
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[INSIDIOUS '86]

Originally Posted by frydaddys87

lol thats funny. my buddy is tellin me the edelbrock might be to big for my 350 cuz it came off a bbc for mud racing. i told him theres no such thing as to big. if you can turn the jets down to meet amount of fuel needed. the motor will only suck as much air as the stroke and bore can pull. so if you can adjust the fuel to this amount you will have a good ratio to start with. i like how theres more adjustments on a holley. theres not much to do with a edelbrock.

Not true. If the ventures are too big airflow velocity will go down dramaticly and decrease your low end substantially and kill power till way later in the higher rpm range when airflow is greater and demand is great enough to overcome the need for higher velocity

This is the same principle as large cc intake runners on a cylinder head bolted to something like a 305
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[frydaddys87]

then i stand corrected. lol but i still dont agree with him sayin its to big for my motor

[INSIDIOUS '86]

If its a 750 then you will be fine. If its bigger. You may as well try something else
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[INSIDIOUS '86]

If its a 750 then you will be fine. If its bigger. You may as well try something else
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[frydaddys87]

no its a 650 edelbrock. ive ran a 750 holley befor and didnt have any issues.

[INSIDIOUS '86]

Oh well that's fine.
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[cory d]

Originally Posted by INSIDIOUS '86

Good power WHEN the HUGE secondary's open up haha.

it does seams like i can drive around all day without ever opening them up

[INSIDIOUS '86]

Yah and that is why they do good on fuel economy
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[dugvera@gmail.com]

What!? Barry Grant!

[rcbildr]

Originally Posted by frydaddys87

i know if you get a holley to far off it can be a pain to get it back runnin right. and good luck with the q jet. ive always wanted to lean how to tune them.

From what I remember he would have it running great, then after a couple months it would go to crap and he would have to readjust it. Weird thing is,m the Holley that was on there before that one was great, but for some reason he sold it.

Thanks, I have a small 3 ring binder full of info I found on the web on how to tune a q-jet. I also have the book on it too. Hopefully, I can get it figured out.

[INSIDIOUS '86]

Originally Posted by dugvera@gmail.com

What!? Barry Grant!

My enthusiasm for Barry grants has long passed due to their LACK of customer service and horrible quality control. Crappy gaskets and cheap needle valves and bulky misaligned accelerator pump pieces. If they had kept the original Holley parts with the time proven design and put more care into assembly deburing and overall making things like the floats and valves with PRECISION then yes they are good- just not worth the money since you have to throw a lot of it away and make a call to Holley.

I myself have a Barry grant modified Holley 750. It works great after replacing both floats and valves with original Holley parts and getting rid of their crap accelerator pump arms. And some actual non stick gaskets from Holley and a blow out protection valve. So yah after that they are great

There's a reason summit don't have them anymore. They just plain give holleys and four barrel carbs a bad rep. Sad to see after you known how barry grant came to be. Then went in the opposite direction they did for sure
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[7.62]

After my original q-jet went south and I traded it in for a rebuilt at the local parts shop (huge mistake) which only lasted a few months before it took a nose dive. I ran the Edelbrock 1406 and it worked pretty good but I could never get my truck to pass smog with it.

I recently worked with a company out of Florida for a new q-jet that would be tuned for my truck, big waste of time and money. Carb was horrible.

Got lucky a few weeks ago at the local pick-a-part and found a 1978 eldarado that was just put out for parts, nice original Quad sitting on top. I pulled that sucker, went to Napa got the base gasket and put it right on my truck.

Runs like new again, I've got my fuel economy back and good power, haven't been to smog yet but i'm pretty sure she'll pass without issue.

If you can find an original q-jet I would grab it and put it away, there getting hard to find, at least around here anyway.