Does anyone know of a source for velocity stacks for Weber carbs? I want a set for my GTC. Mine is a US version - I don't know the carb model offhand but it's the type with the square choke plates and three hold down studs per carb. Anyone out there have the info I need? Bob Z.
It is if you're patient and know where to look. If you're both impatient and don't know where to look your local Ferrari dealer will be happy to do both for you. Should all else fail: http://www.piercemanifolds.com/
Vintage guys are a little more friendly and like to swap stuff from the garage back and forth.. **** those eBay guys, trying to make a dime....you wil need to figure out yuor carb Series & catalog number though, a good thing to know IMO.
Good Luck, Bob Z.....I'll check the workbench....we threw about $20K worth of Vintage Parts stuff away two months ago.... Sigh, no one was ever gonna ask about it.....
For some of the carbs you will not not only the velocity stacks but different carb tops as well. On the Daytona the factory velocity stacks require a completely different carb top. You must move the float assembly from the old carb top to the new, reset the float level, install and then install the velocity stacks. Dont buy a set of stacks alone without the carb tops as they will be useless. For my Daytona I found the carb tops and velocity stacks by doing exactly what you have done: I posted on fchat and a fellow f-chatter PM'd me with a set he had that was taking up attic space. A deal was done and now my Daytona makes really great induction sounds! Terry
Terry - I know just what you mean - there are two square projections on the tops of my carbs. A standard flat flange, as used on many velocity stacks, will not clear them. I have the equipment to fabricate them if necessary - the trick will be fitting the little screens, which I consider a must. Bob Z.
Bob, Making these would appear easier than it may be. The length, shape and curve of the top are all critical. If they are not perfect for the set application the correct venturi effect will not be achieved. When going through recent carb tuning to correct rich running issues we discovered that the car ran very differently with and without the screens on the stacks. The screens were sitting inside the top of the stack. They were thus altering the shape of the flared opening. It turned out this was making a very noticable difference in how the car responded to throttle application and to the fuel/air ratio! Best of luck! Terry
Bob - I preface this by acknowledging your considerable experience w/ Ferrari motors. But the vintage Ferrari motor re-build guys I have talked to have remarked at the hellacious wear the velocity stack motors suffer because of the raw grit that gets run thru the motor. You sure you want to do this?
The first picture shows the kind that typically came with the 250SWB (now on a Lusso). The second picture shows the taller type that came with the TdF. I am not sure if the one that is on this TdF is original. john Image Unavailable, Please Login Image Unavailable, Please Login
Terry, I've searched for "booty" filters, but cannot find any that look like they would fit with the siamised type stacks. Do you know where they can be purchased? Thank you. Mark
Go here: http://www.outerwearsracing.com/index.taf Call them up, ask to speak to their "head engineer" and tell them you want a set of custom made bootie type filters for Ferrari velocity stacks. They custom make them to specs. They made my set and I think they have made several others since mine. Filter booties use a very fine mesh single layer screen that filters down to 4 microns. They slip over the stacks and have a drawstring to pull them tight. You have to remove them and clean them from time to time but its very easy. They make these for use on injection stacks on dirt track racing cars.... more than capable of doing what we want done! Terry
Wow. Cool stuff! Could someone post a close-up picture of just one velocity stack pair? Do the carbs need to be adjusted after going from the bigger snorkel air filter intake to velocity stacks?
A friend of mine bought a 250 GTO which was used as a street car for years here in the Philadelphia area. There were no air filters on it when he bought it and as far as I know, there never were. When I had the engine out and apart, I was amazed at how clean everything was - The bores were within tolerance and didn't even have any ridges. As far as I could tell, the engine was never apart - at least, there were no telltale signs. Anywow, the feedback on this thread is great - it even helped me to find a company that may offer a fuel injection conversion for my GTC. That might help the low-end torque for pulling a trailer. Bob Z.
Bob, Fuel injection isn't worth it. Drop in a 400i motor or a Chevy if you want to tow things with your 330 GTC . Regards, Art S.
Hi, Art - big block or small block Chevy?? Maybe a 500 cubic inch Hemi!! Can you picture my GTC with a hood bulge for the blower? Bob Z!!!!!
From my memory it's a 426 Hemi with 500hp. Just get a Charger hood and cut it down a little, we'll make it fit. By the way, I have thought about getting a parted out PF Coupe or GTE and and a wrecked 400 and mating the two. A 400 drivetrain in a PF or GTE would be pretty cool if you could beef up the chassis to handle the extra power. Even better if you could build up a Daytona-like 6 down-draft carb set-up. Regards, Art S.
Or, 6 DCOE carbe from the C-4. This is getting exciting. Art - I'm in NJ quite often - where are you? Bob Z.
Stacks for 308 vs stock Weber hornets. You see stacks need some adapters to fit on the carbs top. Baby white socks do outstanding job in protecting from dust and debries. Cal Image Unavailable, Please Login Image Unavailable, Please Login
