Download Rochester Carburetor Manual - Techbook 2068 - 1,2,4 Barrel, by John Haynes PDF

  • admin
  • March 28, 2017
  • Nonfiction 2
  • Comments Off on Download Rochester Carburetor Manual - Techbook 2068 - 1,2,4 Barrel, by John Haynes PDF

By John Haynes

This sequence of entire manuals supplies the house mechanic an in-depth examine particular parts of vehicle fix.

Show description

Read Online or Download Rochester Carburetor Manual - Techbook 2068 - 1,2,4 Barrel, Tuning, Repair, Overhaul, Modifications (Haynes Manuals) PDF

Similar nonfiction_2 books

Opium for the Masses: A Practical Guide to Growing Poppies and Making Opium

Opium medicinal drugs tradition stories Drug coverage Poppy

Both Sides Of The Border: A Texas Folklore Sampler (Publications of the Texas Folklore Society)

Texas has a wide inhabitants who has lived on each side of the border and created a folkloric combine that makes Texas targeted. each side of the Border will get its identify from its emphasis on lately researched Tex-Mex folklore. yet we realize that Texas has different borders along with the Rio Grande. We use that identify with the folklorist's wisdom that every one of this state's songs, stories, and traditions have lived and prospered at the different facets of Texas borders at one time or one other prior to they crossed the rivers and turned "ours.

Extra info for Rochester Carburetor Manual - Techbook 2068 - 1,2,4 Barrel, Tuning, Repair, Overhaul, Modifications (Haynes Manuals)

Sample text

Both approaches provide correct air/fuel mixtures and both operate in a similar and satisfactory manner. Slots are more typical, however, because they're cheaper to machine. But ports or a slot, this is the important thing to keep in mind: When the port/slot is above the throttle plate, it's an air bleed; when it's below the plate, it's a fuel discharge port. Another peculiarity of off-idle systems is the adjustable off-idle air bleed used on some emissions carburetors. A sepa­ rate air channel bleeds air past an adjustment screw into the idle system.

And since the jet provides very little restriction to low flow, little turbulence is created as the fuel comes out of the jet into the main fuel well. But as the throttle is opened fur­ ther, higher airflow through the venturi creates a greater pres­ sure difference in the main metering system. As the flow through the main jet increases, more fuel must go through the small hole in the main jet, creating greater turbulence. Interest­ ingly, as the pressure difference increases across the main jet, the proportion of fuel flowing through it for a given pressure difference is less.

By amplifying the signal available for main system opera­ tion, the boost venturi enables the main circuit to function well even at lower speeds and, therefore, lower airflows. This ability is even more advantageous in high-performance carburetors because a boost venturi doesn't seriously impede the carbure­ tor's airflow capacity. Booster Venturis have a number of advantages, the most important of which are the following. First, the trailing edge of the booster venturi discharges at the low-pressure point (vena contracta) in the main venturi.

Download PDF sample

Rated 4.61 of 5 – based on 32 votes