Holley VS. Edelbrock

[bitchin85]

nobody?

[qu1cks1lver56]

idk about the choke thing, i'd just put it on the bottom of the dash where you can reach it.

With mine (choke held open), even on cold winter days (cold fl days lol) it's not that hard to start. I just pump it a few times, turn it over and pump it once as it's turning over and it fires right off, then I just keep it running for a few minutes and it's fine.

[bitchin85]

well i just have to crank and pump and crank and pump... till it fires and it idles and drives fine cold just a pain to start only in the cold morning

[78BO]

Originally Posted by 85Bowtie

An out of the box Holley, basically all there is to "tune" is your idle mixture, idle speed, and float level. Your float has a brass plug that you remove and put a clear site plug in it's place. With the car running, you check to see where the fuel level is in the clear site plug, you want it just at the very bottom of the plug. To adjust it, you need to turn the vehicle off and use a wrench, and a thick flat blade screw driver and adjust the float up or down, depending on whether the fuel was high or not even registering in the site plug. Tighten the nut back up, start vehicle and check until you barely see fuel in the bottom of the plug.

The mixture screws are set with a vaccum gauge. You hook it into your vacuum port on your carb with the vehicle running and you adjust each side in equal amounts until you show the highest vaccum reading on your gauge. On a Holley, the 2 screws need to be turned in and out equal amounts, so the best way to start adjusting is to close them up all the way and go from there in equal turns on each side.

Your idle speed is self explanatory. Turn it until you idle at the proper RPM with it in park and in gear.

The choke, fast idle, secondary spring etc are all things that shouldn't have to be adjusted. The 3 I mentioned need adjusting from time to time from vibrations, fuel, etc.

This is what I've been told to. I think I'm gona save up and by a Holley. I have a 750 Edl and I've never been saticfied with it.

[68 TT]

Originally Posted by *****in85

... im just going to hook up a mechanical choke and hide the know under the dash. anyone have pice on where they put theirs?

My 67 has a bezel on the dash for the choke cable to pass through. You might be able to find a stock setup like that and retrofit the choke bezel into the panel next to the headlight knob on a square body.

[bitchin85]

thanks ill see what i can do. all im looking to do is not have a big ugly bracket hanging down that has the choke knob. i like to keep stuff hidden.. i put my tach down under the ashtray facing up and removed the ashtray/cigg lighter and put a plate there for a temp guage,(factory one broke) and switches.

[HOGDADDY]

Originally Posted by LONGHAIR

I wasn't even aware that Edelbrock made a mechanical secondary carburetor?

All of the edelbrock carbs are mechanical secondaries btw. I have run Edelbrock carbs for many years trouble free. Double check float settings and use a carb heat insulator (spacer) on them all it needs except for throttle correction lever for a 700r4 if needed.

I also have a Holley 750 DP on my 406 in 80 Camaro. Hard to beat the Eddy for daily driving and I hear Eddy's electric choke is far better than Holley's.

[ChevyC102007]

Im pretty happy with my Holley, adjusted the idle mixture screws the "old" way, turned em in till they seated and backed em off 1.5 turns. Idles set at factory specs (600 rpm in park) fast idle is right at 1500-1600 rpm couple pumps on a cold morning (cold Nebraska morning) fires right up.

[bitchin85]

this morning i pumped it a few times and she fired right up and idked good. i have to tweak it a little still but im very happy with it.anyone have any pics of how their throttles and kickdowns are hoked up?

[ChevyC102007]

you can go to the Holley website and look up your model of carb. It will give you recommendations for a throttle linkage setup. Also Summit Racing has a dual spring linkage setup as well. Hope this helps.

[jrcaprai]

Neither of those two Carbs... I think you will be under Carbed, you need at least a 650 or 750, and I would do a Demon 1st and then a Holley...

[85Bowtie]

A 750, especially a Demon, would be worthless on the motor he says he's building.

Glad it's running good for you.

[jrcaprai]

Originally Posted by 85Bowtie

A 750, especially a Demon, would be worthless on the motor he says he's building.

Glad it's running good for you.

Oh and why especially a Demon, would be worthless ???

[85Bowtie]

He has a mild build, a 750 Demon is not a mild carb. He wants to use a .460ish cam, which is going to be more than likely in the 256-268ish duration and still have the stock 3.48" stroke. Hardly enough to suck in 750 cfm from a Demon carb through stock Vortec heads with any consideration to efficiency. Why is over-carburetion so popular? Maybe you can tell him, and me, why a 750 Speed Demon would better suit his application?

[jrcaprai]

Originally Posted by 85Bowtie

He has a mild build, a 750 Demon is not a mild carb. He wants to use a .460ish cam, which is going to be more than likely in the 256-268ish duration and still have the stock 3.48" stroke. Hardly enough to suck in 750 cfm from a Demon carb through stock Vortec heads with any consideration to efficiency. Why is over-carburetion so popular? Maybe you can tell him, and me, why a 750 Speed Demon would better suit his application?

Obviously you didn't read my post Completely! Here is My direct quote
"you need at least a 650 or 750, and I would do a Demon 1st and then a Holley"

I did not say he needs a 750 Demon.. your putting words in my post.

My reasoning is that the 600 will definitely be under-carbed with the Vortec Heads.. and the air-gap Intake.. The Demon is basically a more Adjustable Holley, which in my experience makes it a better Carb.
He said "better power/mileage/low end torque.." The Demon 650-750 will do 2 out of those Three, better than a Holley or an Edelbrock...
And to tell you the truth, He should give the engine what it wants, Not what we want him to get!

[68 TT]

Originally Posted by jrcaprai

Obviously you didn't read my post Completely! Here is My direct quote
"you need at least a 650 or 750, and I would do a Demon 1st and then a Holley"

I did not say he needs a 750 Demon.. your putting words in my post.

My reasoning is that the 600 will definitely be under-carbed with the Vortec Heads.. and the air-gap Intake.. The Demon is basically a more Adjustable Holley, which in my experience makes it a better Carb.
He said "better power/mileage/low end torque.." The Demon 650-750 will do 2 out of those Three, better than a Holley or an Edelbrock...
And to tell you the truth, He should give the engine what it wants, Not what we want him to get!

The original question was which of the two carburetors he currently owns would work better for his truck and not what would be the best carb to buy.

The original question set aside my truck is very similar to his engine wise but with a manual trans and I have put on four different carbs that I have (750 vac sec Demon, 1850 Holley, 1406 Edelbrock & rebuilt stock Q-Jet). The 600 was by far the best for a street driven truck but I went with the 1406 because it had an electric choke and the Holley had no choke at all. The 750 was just too much for a 5400 pound 4x4 truck in city driving.

In a light car with that engine a 750 would work great but on the street in a heavy truck the 1850 Holley is much better and he made the right choice. It may be short on top end power but makes up for it with throttle response and drivability. Just because it makes the most power doesn't mean it is the best for the application.