Antique Engines and Old Iron
[Home] - [HELP] - [Forums] - [Library] - [Photo Gallery] - [Groups] - [Classified Ads] - [Subscribe] - [Links] - [Books] - [Sponsors] -

Go Back   SmokStak > SmokStak® Antique Engine Community > Carburetors, Mixers, Fuel Pumps and fuel delivery
Forgot Password? Join Us!


Carburetors, Mixers, Fuel Pumps and fuel delivery Discussion about misc. carbs, mixers, fuel pumps, injectors.

Carburetors, Mixers, Fuel Pumps and fuel delivery

Holley 650 carb issues

this thread has 32 replies and has been viewed 1676 times

Thread Tools Display Modes
Old 04-13-2016, 11:08:29 PM
Amax Amax is offline
Join Date: Aug 2015
Location: Manchester, Vermont
Posts: 546
Thanks: 287
Thanked 276 Times in 180 Posts
Default Re: Holley 650 carb issues

Personally, the heck with Holley or Quadrajet carbs.

The best economy and drivability comes from the good old Rochester 4 Jet.

Dirt simple to rebuild and maintain, too.

That's my story and I'm sticking with it.
Reply With Quote
Sponsored Links
Old 04-14-2016, 11:38:05 AM
OTTO-Sawyer's Avatar
OTTO-Sawyer OTTO-Sawyer is offline
Join Date: Nov 2008
Location: Scioto Mills, Illinois USA
Posts: 8,022
Thanks: 15,043
Thanked 6,769 Times in 3,269 Posts
Default Re: Holley 650 carb issues

Originally Posted by ChipTosser View Post

I thought this was to give the guy help on his asked subject? I have given him pertinent information for his request.

You have high jacked his request with your opinion only. I can not help it if you have had bad results be cause of, what ever. You can use what ever you like.

Get off your high horse !

I didn't highjack the thread with "my opinion only" anymore than you did with Your Opinion, and I wasn't the First One to suggest going back to the factory issued Quadrajet.
The Subject is Carburetor Problems and getting his Fathers truck running again.

And if you had bothered to read what I wrote you would see that I told him: ""Kind of like the "Ford-v-Chevy-v-Dodge" or "John Deere-v-IH" arguments it all comes down to which is your favorite brand for whatever reason. If you want to stick with the Holley, there's lots of good ideas posted on here on what it may need to fix your problem. ""

As for your "pertinent information" all you did was Repeat what several others had already said about the Power Valves, Float Level, and Fuel Pressure, and where others went on to give more information on settings and adjustments all you did was try to bash the Quadrajet because you don't like them any more than I like Holley's..... Again, nothing more than the Ford-v-Chevy-Doge type of argument.

I've rebuilt my share of carbs of all makes and models over the years and they all worked as planned when I was done with them and continued to work for many many years afterwards with no adjustments needed. I also know plenty of people that have thrown fists-full of money into their Holley's and end up working on them every other weekend where I never have to.

It's his truck and he can do what he wants to with it. I just gave the guy another cheap and easy option with my reasons why I stand by them and you simply repeated what everyone else already told him.

I don't have a problem with you, so don't go turning this into a pissing match if you can't give him any more suggestions than what everyone else already did, which may only help till the next time it backfires.

And with That, I hope to be done with this thread unless you care to argue some more about it.

I just keep coming back again and again like the Evil Twin of a Bad Penny !
Reply With Quote
The Following User Groaned at This Post:
Old 04-14-2016, 01:07:15 PM
akuna akuna is offline
Join Date: Jun 2012
Location: Central Oregon
Posts: 1,669
Thanks: 115
Thanked 545 Times in 430 Posts
Default Re: Holley 650 carb issues

Gosh folks, it is just a carburetor.

Not like we are talking about the end of the free world or anything. Times like this I am glad I have a diesel!
Reply With Quote
Old 04-14-2016, 03:21:33 PM
Georgia SS Georgia SS is offline
Join Date: Jan 2012
Location: Nashville, Georgia
Posts: 33
Thanks: 0
Thanked 18 Times in 12 Posts
Default Re: Holley 650 carb issues

Hey Guys
Can't pass this opertunity to add my two cents worth, for starters I am closer to eighty than seventy, worked on automobiles, trucks, tractors and any thing with a wheel or motor, fairly successful local dirt track racing career, so we lived with holley carbs. a few years back had a coustomer bring in a junk holley to put on a new rebuilt 390 ford p.u., spent 2 days on that holley, run like crap, no idle fuel, about ready to give up, had more invested than it was worth, finally made a call to a guy that had been down ever road, told him my problem, told me to take the metering plates of break off the two gasket holding tits, get the largest flat file around and flatten both sides of the plates, in 30 minutes was running like new, and yes multiple base gaskets and don't over tighten.
good luck
Reply With Quote
The Following 2 Users Say Thank You to Georgia SS For This Post:
Old 04-15-2016, 02:46:49 PM
Greg Mosley Greg Mosley is offline
Join Date: Jan 2005
Location: Nebraska
Posts: 251
Thanks: 220
Thanked 242 Times in 104 Posts
Default Re: Holley 650 carb issues

Thanx Jimmy, I mentioned this in an earlier post. Nine times out of ten the metering blocks are bent. (Warped) Wisdom is good! Enuf Said
Reply With Quote
Old 07-19-2016, 08:47:41 PM
IronworkerFXR IronworkerFXR is offline
Join Date: Dec 2010
Location: Stamford, Connecticut
Posts: 384
Thanks: 2
Thanked 150 Times in 112 Posts
Images: 46
Default Re: Holley 650 carb issues

dealt with a lot of holly carbs, had no choice when racing the ford, fuel pressure is important and also the power valve.
IF I was running a 350 I would use a well tuned Q jet any day over a holly.
just my 2 C
Reply With Quote
The Following User Says Thank You to IronworkerFXR For This Post:
Old 07-25-2016, 10:42:57 PM
carbking carbking is offline
Join Date: Jan 2013
Location: Eldon, Missouri
Posts: 24
Thanks: 0
Thanked 20 Times in 12 Posts
Default Re: Holley 650 carb issues

OK - not going to get into the Holley vs Q-Jet vs ...??? Both can be made to work.

I will comment that if one is going to use a square-bore carb and has a spread-bore manifold, one should realize it is impossible for the marriage to work as well as either should.

Having said that, moving on to the issues posted.

Did the hard starting began when the weather got hot?

Does the fuel run out beside the throttle shafts ALL of the time, or just when the engine is switched off?

You mention the base needs trueing. Assuming you mean the throttle body. If so, where? On the top where it mates to the main body, or on the bottem where it should mate to the manifold, but is now mating to an adapter? If we are referring to the throttle body, it should be aluminum, not zinc alloy, and warpage is quite rare. Or is the adapter warped?

Can you rebuild the carburetor? Probably, but if the throttle body IS warped and will require machine shop work, why bother? Used Holleys are literally a dime a dozen. If you wish to stay with the Holley, get one with no warpage, and rebuild it. Remember that if there is a reason the throttle body warped, machining to remove metal will mean if the reason is not diagnosed and fixed, the throttle body now has less rigidity and will again warp, but sooner.

Also, if you are sold on Holleys, Holley used to make a 650 spread-bore that will bolt to the Q-Jet manifold WITHOUT the need for the adapter.

Personally, I, I am not going there. Hope the above is useful to you.

Reply With Quote
The Following 2 Users Say Thank You to carbking For This Post:
Old 07-26-2016, 11:08:15 PM
s100 s100 is offline
Join Date: Jan 2008
Location: detroit, MI usa
Posts: 347
Thanks: 73
Thanked 199 Times in 144 Posts
Default Re: Holley 650 carb issues

I've owned any number of Holley carburetors over the years and have found them to be crudely designed, thirsty and trouble prone. If the truck came with a Holley, that's what the factory engineers developed and tested the engine with and I didn't feel like trying to outsmart 'em. I've got better things to do. That said, I spent an inordinate amount of time working on the stupid things.

On the flip side, the Rochester Q-jets are sophisticated, reliable and economical. Yes they are fussy to rebuild but it's not rocket science and if you can take it apart and can follow instructions you can put it back together again to good effect. Give it a try, what have you got to lose? You'll have less time and aggravation tied up in this repair than you would have trying to re-engineer the thing and cobble on some adapt-a-kit junk.

Now even though I have nothing good to say about Holleys, if your engine came with one from the factory, I would urge you to fix it and run that, for the same reasons mentioned above. Re-engineering something is time and cost intensive if you hope to get ir right, and simply bolting on something some doofus in an auto parts store or "hot rod" supply says will work is leaving WAY too much to luck and chance.
Reply With Quote
The Following 2 Users Say Thank You to s100 For This Post:
Old 09-11-2016, 02:06:48 AM
Prony Man Prony Man is online now
Join Date: Jun 2010
Location: Cedarville, Illinois
Posts: 72
Thanks: 0
Thanked 79 Times in 35 Posts
Default Re: Holley 650 carb issues

I put a 650 spread-bore on my new 78 f-150 4X4. I bought it for 20 bucks, rebuilt it with Holley parts. It had the huge mechanical secondaries and tiny primaries. Also the big secondary pump. With 351M 4SP, Edelbrock intake, big Crane hyd. cam, 4.56 gears and 38 ground hawgs. I got consistent 17 mpg on interstate hwy. trips to Silver lake sand dunes in Michigan. Usually 3or 4 Chevys in our group got 10-12 mpg. We all stopped for gas together and compared mileage. The Holley double-pumper carb was invented by Smokey Yunick, developed from a highly modified IH heavy truck carb. Check out his book, Best dam garage in town. Its actually a 3 volume set.
Reply With Quote
Old 09-11-2016, 08:57:55 AM
angrybug73 angrybug73 is offline
Join Date: Jul 2016
Location: Apex, North Carolina, United States
Posts: 11
Thanks: 5
Thanked 9 Times in 6 Posts
Default Re: Holley 650 carb issues

With the benefit of some experience, I too would recommend replacing the finikey Holley with a Rochester Quadrajet (or Edelbrock if you have a square bore manifold) for better drivability, better fuel economy, and no constant fiddling, and adjusting. Holley is a good carb for racing on Sundays, or for applications that put more importance on full throttle performance than they do idle, and part throttle performance, like Chevy 366, and 427 tall deck, medium duty truck engines. For a vehicle that goes down the street, stops at the red lights, and cruises low, and slow, a Holley will eventually become troublesome.

I would venture a guess that the shops in your area won't work on it because they know that it's extremely difficult to get a used Holley to work right consistently, and not exceed the cost of outright replacement. I have turned down the opportunities to rebuild Holley four barrels because they're too prone to coming back for ruptured power valves, mixture adjustments, float adjustments, and fuel leaks.
Reply With Quote
The Following User Says Thank You to angrybug73 For This Post:
Old 09-12-2016, 03:42:30 PM
EvilDr235 EvilDr235 is offline
Join Date: Oct 2014
Location: Vancouver, Washington
Posts: 368
Thanks: 786
Thanked 77 Times in 59 Posts
Default Re: Holley 650 carb issues

Stromberg 97 and that's all i have got to say. Nothing like a big bore flattie with a forest of 97's.
Reply With Quote
Old 10-23-2016, 10:23:11 PM
uglyblue66 uglyblue66 is offline
Join Date: Dec 2012
Location: Concord, North carolina
Posts: 2,885
Thanks: 646
Thanked 2,128 Times in 974 Posts
Default Re: Holley 650 carb issues

I think this is the thread I received a pm in reference to updating? I had read the entrys back weeks ago but other than the truck being parked for the time being while other aspects of life are being delt with not much else has happened to it.
Sorry I haven't kept things updated. Life gets in the way but that does not mean I don't appreciate the help and the info is here when work is done.
Reply With Quote
The Following User Says Thank You to uglyblue66 For This Post:
Old 10-31-2016, 11:08:56 AM
Tracy T Tracy T is offline
Join Date: May 2009
Location: Cedarbluff, Virginia, USA
Posts: 1,235
Thanks: 392
Thanked 413 Times in 271 Posts
Default Re: Holley 650 carb issues

I just got done dealing with a Holley doing the same thing, I agree with a earlier post bad floats unless it has brass floats. The non brass floats tend to get gas logged and you constantly wind up adjusting them. A quick and easy fix if you think you have some crud in the needle & seat is disconnect the fuel line and run it out of gas. When you hook the line back up fuel will rush by the needle and flush out any contamination. All it takes is a piece of lint to cause it not to seal.
Reply With Quote
The Following User Says Thank You to Tracy T For This Post:

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

F o r u m Jump

Similar Threads Chosen at Random
Thread Thread Starter F o r u m Replies Last Post
Holley Carb on a New Way F type Billy Purves Antique Gas Engine Discussion 2 11-18-2011 06:07:38 AM
Melted Venturi- Holley 2210 Carb- Why? dalmatiangirl61 Antique Autos and Trucks 9 11-05-2011 06:42:43 PM
Holley Carb needed wraymor Antique Gas Engine Discussion 1 04-26-2009 11:07:48 PM
Holley carb on Twin City Phil Johnson Antique Steel Wheel Tractors - Old Iron Lugs and Cleats 13 11-20-2008 01:58:16 PM
1914 Holley Carb Rick Schanlaub Antique Engine Archives 1 06-24-2000 12:26:51 PM

Use "Ctrl" mouse wheel to change screen size.
All times are GMT -4. The time now is 03:59:54 AM.

Smokstak and Enginads site search!

All use is subject to our TERMS OF SERVICE
SMOKSTAK® is a Registered Trade Mark - A Community of Antique Engine Enthusiasts
Copyright © 2000 - 2016 by Harry Matthews P.O. Box 5612 - Sarasota, FL 34277