I am now running an 86 l69 305 with heavily ported stock heads lunati cam 455-483 lift 205- 215 duration at .50, headman shortly headers weiand 7547 intake t5 trans 3:73 rear I am looking at pulling off the 454 tbi needs chip tuning bad, for a new Holley 700 vacuum sec carb and HEI distributor. A friend owes me money so I am getting the carb for free. Is this too much carb for this setup

 

For free...not it's not too big.

 

It will run but a 600 will run circles around it

 

What's the list # on the carb?

They don't make a 700 VS.

 

a 750vacuum sec carb is not too big.
they are very flexibe and will "Size" itself to your motor.
A change to a hi-performance dual plane manifold
like a Weiand Stealth 8016 would give you a noticable gain in midrange torque over the single plane manifold you have now.
Lots of under hood room with the Stealth.

 

Thanks for all the info so far. The carb is a 750 VC typo on my part
3310-3 secondary metering block installed 76 jets front and rear I am using a single plane intake because I had to much low end torque I wanted to move the power band up I think I would be better off with an 600 cfm or 650 double pump maybe an edelbrock any one looking to trade

 

the edelbrock would be a good choice in my opinion but im biased.......i have owned many holleys and had bad luck but thats my experience with them many many people enjoy them and swear by em ..myself im an edelbrock person but i do agree if your running a quarter mile car go holley all the way but for street cruising go with an edelbrock

 

I have an Edelbrock I'd gladly trade you! Now what carb do you have, exactly?

Where does this philosophy come from?? I have an Edelbrock right now that I think it's terrible for "street cruising". I hate it. It hesitates at every throttle tip-in (grrr), it starts hard, hot or cold, and it's basically BRAND NEW!

Is there really a tangable feature about each brand that makes one good for the "strip" and one good for the "street"?? Or is this an urban legend?

 

I'll submit as evidence my own experiences over the last 3 years with the 396 in the '57:

2001: I'd been running an Edelbrock Performer 1901 q-jet since 1998 (onverter stall is ~2200, 3.08 gears). Inconsistent as can be because the AV has a "gritty" feel, I had previously "improved" it by removing the pull-off link and adjusting w/tension only and the replacement link I got from Edelbrock wasn't the right one, etc., etc., etc. So, everybody loves Holleys, and we all "know" VS for auto, DP for manual - I've got an auto so I get a 750 VS w/electric choke and 4150 conversion. Times and MPH don't improve, but consistency does, so I'm happy.

2002: Mid-season, switch to 3.73 gears, pick up half a second. Play with jetting, VS springs, convert to Quick Fuel adjustable secondary housing; seem to be getting all out of the 750 VS that is possible. Manage to do well enough to qualify for the Summit ET NHRA Div V finals in Topeka.

2003: Keep hearing on this board and fellow racers that "VS for auto, DP for manual" isn't a hard and fast rule. Sure enough, Holley website has a chart that shows how big of a DP you can use with an auto based on engine displacement and minimum RPMs at which you go WOT. Says I could use a 750 DP with my combo. Fellow racer has a 650 DP he's no longer using, says I can borrow it and buy it if I like it (CFM formula says 650 is big enough for my combo). I retune from where he had it for his more "radical" 350, 1st time out it takes .2 off ET - keeps it off with more runs. Week later get a higher stall converter (said 2800-3200, but it stalls at 3500 for me), take off another .2 from ET. A month later I get the Proform 750 main body, it takes a little more off ET, but not significant. Cool air ducting takes another .1 off ET (mostly off 60'). Qualify for Div V finals again (this time at home track), and end up runner up in season points in the "Club" racing series. Set best ET in sig.

2004: Use different mufflers, slightly off on ET, but still relatively consistent. Currently in 3rd place is season points in one ET series, within one round of 1st; a couple of rounds out of 2nd in another series.

MPH has stayed pretty consistent throughout all of this. The q-jet MPH was right around (slightly higher) than what I'm running now, and I'm ~1.5 sec quicker now than I was with the q-jet.

My conclusion: For ET, you can't beat DP. For MPH (peak HP), take your pick. For driveability (although I typically only drive on the street to get to the track), it's pretty much a wash (although I've never had an AFB/Performer). For MPG, q-jet gets the nod.

 

i have had many holleys in my time now and have had good luck with some and bad luck with some but i bought my first edlebrock in 1995 and have never looked back since i dont have to worry about power valves or leaking carbs or constant rejets , leaky sight glass or anyof the other problems i had out of the holleys i just fell in love with the edlebrocks and dont have any problem with performance with them . never had a problem with throttle tip in or anything like that the only problem i had with throttle tip in is when i bought a manual choke afb and didnt hook up the choke to anything and test drove it the first time it hesitated and when i got back to the garage i noticed when i hit the gas it was pulling the butterfly shut on me and causing it to hesitate ....lol....dont know what your haveing problems with but im sure its not all the carb if you work with it you will learn to love them as much as the holley guys love thier holleys .....its all about brand loyalty now a days with most guys because they arent old enough to have owned more than one carb and thats only because thier dad or brother or cousin or uncle told them to buy that brand and they have never given the other brand a chance at all .....they are biased only by ignorance ....

and im not calling anyone ignorant im only saying ignorance is lack of knowledge

 

I think application has something to do with it.

As I was trying to say (but may not have made clear), there are certain usages that it really doesn't make much difference - they all perform similarly - so it doesn't make much difference which one you chose. In that case, whichever one you want and are most comfortable with will be the one to chose.

Admittedly, I haven't tried a demand-based secondary type carb on my setup since going with the higher stall. But, the data I've gathered clearly indicates a superiority in the DP for drag racing, at least for the given conditions. I really haven't had any motivation to put the VS back on to see what it would do. I know some people with engine-driven blowers who use demand-based secondary carbs (Holley VS and AFB/Edelbrock), which seems to work well for them.

I have also said, repeatedly, in response to those wanting to "trash the quadrajunk" that they are making a big performance $'s mistake. Clearly, a DP is not the right answer in every case.

Just for the record, I'll agree that ignorance is a lack of knowledge. But, if you aren't calling anyone ignorant, why did you bring that up?

 

wasnt meaning it twards you at all
im just saying alot of people are ignorant about carbs because of not having any experience with more than one kind ......

i agree with you entirely about the racing world and holley never have i agreed with using a holley more than on a strip especially the DP ... i have never thought of using an vs for racing purposes but would be interested in what tuning it would take to make it perform great on the strip im sure there are plenty of them out there but you never really hear of them .........
and yes there are some instances that it doesnt make any difference which type you use at all and as you said then its mostly what you feel comfortable working on or brand you like best ..

 

I have had both Holley and edelbrock carburetors before they both work great when properly setup however on high duration large cam engines the Holley’s will work better
For mild street engines or 4x4 s edelbrocks are great as far a Q-jet gas mileage is king
Most people have no idea how to properly tune or set up carbs anymore I was doing this stuff 20 years ago

 

same here ive done it for atleast the last 16 years myself ......i get a kick out of people that tell me i must have never owned a holley before because they rule......LOL but holley or edlebrock or quadrajet ..its all in a matter of what you want when you buy your carb the argueing can go on forever and a day theres always going to be opinions ....lol
but i agree that for daily driving edlebrock is the way to go but ive owned engines before that had over 400 hp and ran edlebrocks on them and never ran into a problem and ran strong same way with holleys and have also had to about pull out all my hair on carbs especially holleys ....lol...but a good holley is good on the track anyday but for cruising i prefer my edelbrock....

 

If that's true then that is my problem. I have a cam that has well over 300* of seat to seat and 234/244 at .050", in a 350 (I didn't build it). The carb is an Edelbrock 1411 (750 cfm). It is virtually brand new, but it works horribly. I have changed jets, needles, springs, float level, and none of it helps. I don't love any brand nor do I hate and BRAND, but I DO hate this particular carb as nothing you do to it helps in anyway! Grrrr!

I have plenty of expirience tuning carbs too. Q-jet(Trans Am), Motocraft (CJ5 w/a 360), Thermoquad (Jeep J-10 w/a 401), Holley (my Mastercraft ski boat), and Carter (Jeep J-20 w/a 401). Further I have extensive expirience tuning Mikuni and Keihin round and flat slide carbs on sleds and bikes. My sled makes ~170 hp from 860cc's. Clearly if I didn't know how to tune a carb, I'd be having major issues there!

But this Edelbrock just doesn't seem to respond to changes at all...on this motor. Very frustrating. To the original poster: I'll trade you carbs in a second.

-Tom

 

you must have done something wrong or something?? i dont think i have ever had a problem with one taking to changes with the float jets or springs .......thats confusing

 

Feel free to call me nuts but had this prob with an edelbrock carb on a built 383 would not idle for s*&^t off idle was worse cruise and wot where great put on a Holley and life was good.
I had a stock 68 olds 442 W31 in 1989 the Holley 650 I had on it died float bowl bolt stripped out bought 1405 edelbock to get home OMG car never ever had that good!!

 

alot of it depends on the carb day to day when you buy them like i have said before sometimes you can get a good holley and sometimes you can get a good edlebrock or quadrajet or carter or what ever it all depends upon preference and how much you want to work on them i guess

 

I agree they are all great when set up properly.
but I think that the 750 carb I have is to much for my 305 will it run sure .. but a 600 would run better !!

 

definatly ....a 600 is good on a stock 350 not to mention a 305

 

If I had a few grand laying around and six months time I would try and make the fuel injection work...f )* that

Couple hundred bucks and an afternoon in my driveway and I will have a carburetor that will kick Gas!!

I want to race this weekend!!


:hail: :hail: :hail:

 

The 750 will work, not the best choice but alot better then a out of whack TBI unit or a properly tunned one for that matter.

As far as the old Q-jet-Edelcrap-Holley debate...

They all work fine. One may be better suited for a certain application like 57 finally got around to figuring out and if I remember right there were quite a few arguments there

Ive never had a problem with any of these carbs after fine tunning its just alot easyer with a holley.

I sold all of my edelbrock stuff last week $150, it worked great but the holley works better.

 

its all in a matter of preference i believe but you will have to definatly jet down that 750 to make it work for you