This article is meant as a how-to for dummies therefore you won't find here any deep technical details, physical analysis, differential equations and similar stuff. As you could notice from the title, yep, I purchased this non-expensive carburetor from well known quality company. Concretely, the performer 1405 carburetor is recommended for engine ranges from 305 till 350 cubic inches. It makes 600cfm which should suffice for my "small" application.
And what about current situation, what sits on the engine now? It can't be hard to guess - it's the great vintage Rochester QuadraJet 7028212 DH. This one was being installed to earier Chevy vehicles with 327- or 350cui small blocks.
Now let's see how we did the job, what hose and where to connect. Perhaps, this might also ease the installation to potential daredevils.
Hoses identification and QuadraJet deinstallation
I was quite surprised of the DVD packaged with the carburetor. It features a pleasant gentleman who tells a tale about how to install the Edelbrock carburetor. After some repeated views I started the preliminary tasks. I'll try to make a brief description of the following pictures:
- Let's take it in ordered way, number by number. Number (3) points to a fuel inlet. In contrast to the Edelbrock carb, QuadraJets have the fuel filter built-in therefore I must use my own.
- The middle rectangle labeled MV was initially considered as uknown hose. Te determine the purpose of this one it is necessary to fire the engine up, disconnetc hose and put your finger on the carburetor plug. If you feel like you're getting sucked into the carb then we have Manifold Vacuum here, otherwise Timed Vacuum takes a place. Well, because I almost lost my finger, I labeled the hose as MV.
- Hoses (1) and (4) are a part of the PCV system. One of these comes to be directly plugged into the new carburetor.
- The last one but rather the most important one (5). Without reconnecting this hose I would drive the car for the first and for the last time. It serves for the power brakes.
Edelbrock Installation
Regarding the scheme on the right we can easily understand what to plug and where. Input port labeled Timed Vacuum was plugged. I ssuffered following issues while installing - missing hose connection for power brakes, too short hose for manifold vacuum, two worn threads in the manifold. Those two I had to redrill to the closest metric size. The MV hose looks like silicone on the pictures bellow but was replaced by a rubber one later. The fuel-line solution is not final yet as you'll see on some article later ;-)
Posted @
29. září 2008 11:22