A good carb

[jusbo]

Hello all....I was wondering what a good brand carburator was. I have heard good things about Holley and bad things about Edlebrock. I do not want to over carb this engine...600cfm to 650cfm MAX. Thank you for your input.

[ZR1BLAZER]

the best carb for the price and ease to adjust and rebuild or modify and still work great for you on the street would be a holley 670 street avenger. JMO http://www.s10v8.com/images/smilies/icon_wink.gif

[speeder]

I had an Edelbrock 650 and it was awesome. I could peel out any time and the truck drove nice and had about 12-15MPG. I had it for about 2 years and I never adjusted it after setting it one time.

Then I had an edelbrock 750 for 8 months and that sucked. It was so bad, it would ruin the cruizing I do with the S10. 5-8MPG and just plain bad. Someone had scartched it up inside (Ebay), but it was definitely too much carb.

I am with a 700 Holley now for about a week and it is very nice. Easy to adjust.

The bad part with the edelbrocks is that you cannot buy different parts to adjust the mechanical secondaries. The reason I changed recently is that on a holley you can adjust anything and you can buy the kits.

That is what my personal experience is.

[phil33875]

AED put out a really good modified holley carb, but at a really good price. Check em out AED (http://www.aedperformance.com/)

[Scotty_S-15]

Street? Street-strip? If either, you could go with either the Holley or Edelbrock, an off-the-shelf carb should work nicely.

...........My thoughts of buying a street or street-strip carb are:

* If you\'re more familiar with one or the other, then that\'s the one to get.

* If a Holley, get a vacuum secondary carb, not a double pumper.

* Holley\'s are generally known to be more adjustable (easily) for race tuning.

* Edelbrock\'s are generally known to be good for street/everyday use and economy.

* You can possibly get a \"turkey\" with either brand. http://www.s10v8.com/images/smilies/icon_mad.gif

[ChevyKiD_69]

if i was going to run like you stole it i would go holley if you are want a ok carb to run on a everyday driver you could use a edelbrock. me i never had good luck with a edelbrock. i will run holley\'s from here on. jm2c. nick

[BrandOmatic]

Demon\'s are good too.

[s10rodder]

I\'m gonna give my opinion on demons after having tried 3 different demons on various combos...



terrible.



I could never get them to run right, even after doing silly amounts of research, buying/reading books, etc... I think for a full blown race car they are good because they\'re almost infinitely adjustable, but for a street car it\'s just so hard to get them to work right because of all the variables.



My fresh 383 had to be completely rebuilt last year because the carb was dumping so much fuel at idle it never let the rings seal completely. A/F was dead on at WOT, but it needed a different idle feed restrictor to even allow the mixture screws to do anything. By the time I figured that out it was too late. That was on a 650 carb, btw... you\'d think they wouldn\'t go crazy with the factory calibration of the idle circuit on a carb that size.



My other beef with them is the tech guys are complete a-holes. Not helpful at all and they all seem to have a \"I\'m too cool for school cause I work for demon\" attitude. Not pleasant to deal with and not helpful or friendly at all.



I put a holley 750 HP on the motor after the rebuild and it was almost perfect out of the box. Didn\'t even change jets... Just a simple tweak of the mixture screws and it runs about 14.0 at idle, 13.5 cruise, and 12.5 at WOT.

[ZeroGravity58]

prosystems...they put out a modified holley acarb and they are awsome. I have mine which is a 4150 main body with dominator venturies in it. Out of the box bolt right on no tuning. If you give them your engine specs they will get the tuning within 1 jets size. Mine out of the box went 10.94 on my motor...

[RE-KLUSE]

i have had good luck with demon carbs,and i know barry grant,and some of the tech guys,because i have brought fuel to them.im only 20min away from the main office,but i have heard ,and seen BAD things with demons i guess ive been lucky.a friend of mine bought one of the new proform carbs,and says its one of the bests carbs around right out of the box(he\'s had more carbs than i can count).



the guy that builds,and tunes bill elliots carbs is only about 30min away,and i get him to beef up mine(mostly demons).i think everyone has had problems with all carbs at some point.

[BrandOmatic]

yeah i agree about them being hard to tune unless your a fricken engineer at barry grant inc... i was not happy with my 750 speed demon on my 350 chevy, so i bought a 650 speed demon calibrated for a 330hp vortec crate motor.. dropped it on my vortec motor and it runs really well IMO without me touching anything at all on it.



for the fella that posted the question, i think the concensus is a holley is best for a higher performance application, and an edelbrock for more of a street application. and they\'re both fairly cheap compared to demons and such.

[1BAD_S-10]

Go with the Holly. As a matter of fact I have a 600cfm (Vac Secondaries) you can have for $50 plus shipping. Ran great, updated to a 750 double pumper when we put a larger cam in.



Let me know.



Brian

[rayL]

i dont mean to offend anyone but i think most the folks that have tried the demons didnt have anywhere near the motor that a demon requires. I run a demon 750, earlier in the year i tried a holley hp 4150 and lost 2 tenths right out the box. Plopped my demon on, adjusted the idle mixture, picked up 2 tenths. It has not been jetted or any air bleeds changed. By looking at the plugs, i dont think it gets any cleaner. Someone mentioned a prosystems carb. They are the elite in carbs right now, definitely good stuff. Also check out VDL carbs, not cheap but prolly one of if not the best out there.

[phil33875]

ray i have the 4150 hp race carb on my truck and the only thing that i dislike about it is the progressive mech secondaries. The good thing is that you can buy a 1:1 linkage and have all four of those babies squirting at the time. I am not happy about the secondaries at all because all four are not squirting until 5000 rpms.

[jusbo]

What a response!! Thank you for all of your input. I am going to go with the Holley 670 Street Avenger. I have to do a little more reading about what kind of mpg I could get, but for the most part it seems like it would suit me. It is affordable for me, so I like. http://www.s10v8.com/images/smilies/icon_smile.gif Anyway, across from the shop a kid had a fixed up 67 malibu...stalled out on him as he was turning out of wal-mart. Me and Joey went to help the kid (and his girlfriend who was hot!!) His engine was flooded...there was an edlebrock sitting on top. Well Joey held it open and had the kid crank up the car, all fine and well it started....I don\'t want that to happen to me. SO backing up my reason to go with a Holley. Once again thank you for all of your opinions!

[s10rodder]

On 2006-07-10 23:31, rayL wrote:

i dont mean to offend anyone but i think most the folks that have tried the demons didnt have anywhere near the motor that a demon requires. I run a demon 750, earlier in the year i tried a holley hp 4150 and lost 2 tenths right out the box. Plopped my demon on, adjusted the idle mixture, picked up 2 tenths. It has not been jetted or any air bleeds changed. By looking at the plugs, i dont think it gets any cleaner. Someone mentioned a prosystems carb. They are the elite in carbs right now, definitely good stuff. Also check out VDL carbs, not cheap but prolly one of if not the best out there.





well it would be nice if the techs over there would be honest then, because the carb I had the most trouble with was the one they recommended for my application. A mighty demon 650 for a 450 hp 383 with a 248 @ .050 solid roller and AFR heads.



I will never buy a demon again after this experience. They recommend carb lines based on cam duration @ .050. So, for my old mild hyd flat tappet cam on my 355 they recommended a speed demon 650 w/vac secondaries... that never ran right. Then when I stroked it and put in a bigger solid roller they recommended the mighty demon.



I agree with you that I probably didn\'t have the motor for it, since the mighty demon was dumping more fuel than the motor knew what to do with. My comments are based on the rude, arrogant techs who acted like they didn\'t want to help me because I was just some guy running a SBC on a street car, instead of some pro racer. If the carb wasn\'t gonna work on my motor, why recommend it? Or at least tell me it might need an idle feed restrictor change to run properly. http://www.s10v8.com/images/smilies/icon_mad.gif http://www.s10v8.com/images/smilies/icon_rolleyes.gif http://www.s10v8.com/images/smilies/s19.gif

[oncearacer52]

Most carb problems occur during the transition from the idle circuit to the main. There are hundreds of engine and cam combinations. Way to many for the carb companys to sell the correct carb for each application. I personally will never buy another carb of any kind that does not have adjustable idle circuits. I have used Demons and Holleys and I have never found one that works for me out of the box. I tried 3 Holleys on our SB before we went to a Proform center section and metering plates. Total of 12 replaceable jets. Now we have a carb that is adjusted exactly for our combo. No hesitation from stomping the pedal at idle or anytime. Carbs mix air and fuel and there are two stages to a carb. Both have to be right.

[Scotty_S-15]

I only ever bought but ONE totally new carb in my life. A basic off-the-shelf Holley vac. sec. 750. This was about 6 years ago, for the engine I have now, when it had the GM \"Hot\" roller hydr. cam. Took it out of the box, bolted it on, started it up, perfect. even the F\'n idle SPEED was close. Idle mixture adjustments perfect, think they came 1 turn out. Whatever. I was impressed.

[phil33875]

i had a 650 demon on my truck, cost me 400 bucks. used it for 5 minutes took it off and bought the 750 CFM holley 4150 HP Race Series Carb. Its like comparing a 20 oz porterhouse to 8 oz bottom road. They HP Series(4150) are designed like a dominator. Mine was purchased from AED, so it is a little worked over. By far best carb i have ever purchased