New Carb recommendation

So back at this thread again having done nothing for nearly a year.  The old Holley 600 I bought from Hall is weeping fuel and needs to go.

Any new updates on recommended 600 - 700 cfm carbs?   Holley or Edelbrock or Summit.

Again, stock motor, with Edelbrock performer 4v manifold

thanks much

What about the Quick Fuel series - 600 https://www.holley.com/product...-series/parts/HR-600

or 650?

Or a vacuum secondary https://www.holley.com/product...ries/parts/HR-680-VS

FWIW, I replaced my old Edelbrock carb with a 600 cfm Summit carb last year. Had to work a few issues along the way, but that's what I enjoy doing during the winter months. Great street carburetor right out of the box, IMHO, based on blasting around 1,500 miles going to area cruise-ins last year. 

Thanks. What issues did you face with it

I have a Quickfuel 750an on a Performer like yours. I got it because of the an boosters but it's fairly rich even after tuning on a chassis dyno. I think someone on the forum recommend changing  jet sizes somewhere, which I need to do.

Have you thought about the Holley 700 modified by Larry Stock at Pantera Parts Connection? Its listed as having many Pantera specific changes. If I were to do it again I think I would've given it a try.

They discuss it about part way down the tech tips page.

http://www.panteraparts.com/techTips.php

panterapatt posted:

Thanks. What issues did you face with it

Two minor issues:

- Installed longer studs in intake manifold because of the thick base gasket that came with the carburetor. Without the thick gasket, the carburetor primary accelerator pump assembly hits the intake.  I also like the insulating properties of the gasket.

- Since carburetor now sat up higher (not much higher but higher nonetheless), I used a dropped air cleaner base so that everything sits below the engine grill as desired. That took a little work to make happen--I bought an air cleaner from Summit to get the dropped base (1 inch drop), but the way the base is constructed hit the carb secondary fuel line inlet.  A 1/2" air cleaner spacer raised the base enough to clear the carb, and, combined with my old air filter and cover, the whole operation sits below the engine grill. I actually ended up gaining a little clearance after all that.

Hope this helps with your decision-making process which ever way you decide to go.

thanks

PPATT, after all the posts on this subject, I'll ask The Question: What kind of Pantera driving do you do, mostly? Hot-street, cruising around town, shows, autocross, some/a lot of open track, or ??? The carb you need to replace that leaky 45-yr-old 600 vac-sec will vary for each of the above choices. If you are a do-it-yerselfer, Pantera owner Michael Haas wrote a 91-pg self-help Holley tuning guide ("Tuning Made Easy") in 2012 that is easy to follow and gives good results. I recommend it; at the end, you WILL understand carburetors better. You will also smell of high-test for a week. If you are not a DIY guy, buy a tuner-carb of a size that agrees with how you drive, and phone (NOT e-mail) the seller for his invaluable advice before you order from him.

Option 3: why buy another carb -unless you want to keep a traditional (but not stock) look?  A Holley Sniper EFI is in fact a complicated DIY conversion (with on-line guidance), and while you will likely not increase power, your mileage AND driveability will increase. EFI prices are coming down to rival that of tuner-carbs, too. I also suggest you NOT buy used- either a tuner carb or any EFI conversion. The builder's advice is invaluable and it is included in the price. People who invariably buy cheap/used off E-Bay, then spend hours on the phone with a good-hearted expert (for no cash to support his l'il business) while trying to straighten out their low-buck 'solution', rubs me the wrong way. Good luck, whichever path you take.

My driving is purely street cruising.  EFI is complex for me and not something I want to tackle.  Will not buy anything used - agreed.  Just want a carb the is sized reasonably and doesn’t take a dyno guy to make work.  Thanks

This one! I've installed three of these on my stock engines. I had to adjust the choke setting, and the idle, but other than that nothing, they are perfect out of the box. 

https://www.amazon.com/gp/prod...ge?ie=UTF8&psc=1