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We serve the VW parts and VW Tech needs of owners of aircooled VW Beetle, Volkswagen Bus, Karmann Ghia, Type 181 Thing, VW Type 3 Squareback / Fastback / Squareback, and Type 4 VW. Tech Tips, project advice, and quality parts for VW Restoration, VW Performance and Custom Aircooled VW projects.

Making the Weber Progressive (32/36 DFEV) Work on the Aircooled VW Engine

DFEV Intake Preheat

Here at ACN we have gotten enough tech questions asking about the Weber Progressive Carburetor that we felt it was time to get a good article up on the subject. These are our OPINIONS on this subject. Hopefully this article will help some folks, who really have no idea what they are doing, to get their progressive running well.

If you have an EMPI progressive, understand that is a Chinese copy of a Weber DFAV/DFEV. We suggest that you get a real Weber DFAV/DFEV.

The DFAV and DFEV are the same basic carburetors, BUT the “A” stands for “Aqua”, or water. Put simply, the “A” is just a water choke version, and the “E” is the electric choke version. Because our cars are aircooled, we never ever deal with the DFAV. But if you pull one off of a Pinto or another car in the junkyard, you may
>>> Read Full Article

VW Type 1 Mileage Master MPG Engine Combo

VW Tech Articles - Aircooled.Net Tech Talk

With fuel prices on the rise, we’ve been getting lots of inquiries about building a VW engine to improve and maximize. This article outlines Aircooled.Net’s recommendations for an MPG Long Block – we call it the “Mileage Master”. This article focuses on the components for a Mileage Master Engine. A lot of guys aren’t interested in improving mileage that much, but their ears perk up when they find out that if they build this engine as we have specified, they will have up to a 50% increase in power over the stock engine! Doing that and having a 40+ mpg power plant is nothing to sneeze at!

[This article does not address MPG TUNING issues — there is so much material to cover on that topic that we’ll instead do another article on MPG TUNING in the near future. ]

The primary goal of the Mileage Master MPG
>>> Read Full Article

1800cc VW Engine Combo: How to Build a Big VW Engine on a Budget

VW Tech Articles - Aircooled.Net Tech Talk

Some folks with aircooled VWs are looking to move up to an 1800cc VW engine from their stock 1600cc VW engine, but don’t want to break the bank in the process. The advice below is intended to help you build an economical 1800cc Aircooled VW Engine Combo.

Know you can see all of our engine combos broken down at this Master List of Engine Combinations! You can see our 1800cc parts list if you find this article confusing.

On THIS one, the first way we recommend to keep costs reasonable is to stay away from machine work – sometimes called a “no machine” VW engine. This is the first article written for our “VW Engine Combo” series. We are outlining a bare bones build that assumes you do NOT have an unlimited funds. You can add to or change components in this engine combo, of course, but if
>>> Read Full Article

How to Install a 009 (or any) VW Distributor

How to Install a VW Distributor

VW Distributor Installation How To


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Stock VW Ignition Timing Vintage Training Videos

VW Ignition Timing Vintage Training Video

Stock VW Ignition Timing Vintage Training Videos

How to Adjust Stock VW Valves

Stock VW Valve Adjustment - Vintage Training Video

VW Valves Adjustment Part 1

How to Adjust VW Valves Part 2

VW Carburetors 102: VW Carburetor Jetting

VW Tech Article - Basic Jetting Theory and Procedure

After springing for a set of carburetors, some people bolt them on, and are “pleased” with the results. Others are upset by a backfiring, or smoke belching monster. In either case, spending the time to properly jet a set of dual (or single) carburetors is a worthwhile task, since receiving “perfect out-of-the-box” carburetors is one of the biggest myths in the VW industry!

Proper jetting varies depending on engine size, elevation, cam overlap, etc. Jetting is so specific to an individual engine that two identical engine combos with the SAME carbs can even require different jets! The moral of the story is: With your engine combo, carb information and driving elevation, we can advise and get you CLOSE, but to know that your carbs are jetted optimally, you will need to spend the time necessary to dial it in. It IS worth doing for drivability, engine life, and
>>> Read Full Article

VW Carburetors 103: How to Synchronize Dual Carburetors

VW Tech Article - How to Synchronize Dual VW Carburetors

This article contains the step by step, detailed procedure for synchronizing dual carburetors on an aircooled VW engine. But before you actually tackle the syncronization, remove the air cleaners, and make sure there are no vacuum leaks (spray starting fluid around the carburetor bases and intake manifolds while the engine is idling). Make sure the engine’s ignition timing, valve adjustments, and other items are all correct also. You do this to ensure that you are adjusting the carburetors to a TUNED engine, not one that has problems.


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Stock VW Carburetor Adjustment Vintage How To Video

Vintage VW Carburetor How To Video

How to Adjust your Stock VW Carburetor Part 1

Stock VW Carb Adjustment Part 2

VW Engine Break In Procedure

VW Engine Break In Procedure - VW Tech Articles by Aircooled.Net

Many people do not understand the importance of the following the appropriate steps to prepare an engine to run for the first time. Following proper VW Engine Break In Procedure can mean a long life or fast death for a high VW performance engine. The information in this article can also be a useful guide to starting a VW engine that has been sitting for a long period of time, since it ensures proper oiling before the engine fires up.


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VW Performance Engine Building Considerations

Building a ‘Big’ Aircooled VW Engine (Type 1)

This article is a guide to the theory and choices involved in building performance engines for Aircooled VWs (Type 1). There are careful decisions to be made with regard to the engine size and components that are “right” for what you have in mind. The Beetle (and other Type 1 VWs) are fairly light cars. Relatively speaking, it doesn’t take a lot of power for you to really get moving! 140 HP will keep even the Mustang GT’s in your rear view mirror on the street, and 180 HP will eat Corvette’s and Vipers for lunch all day.


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Aircooled VW Performance ‘Easy’ Bolt-On Modifications

“Bolt-On” VW Performance Improvements for your Stock VW

This article is for the aircooled VW owner who ask “What relatively straightforward modifications can I do to make my aircooled VW faster and even more fun to drive — without breaking the bank?”

The following modification recommendations will give you the biggest grin per dollar you invest in your car! Most of the modifications in this article are easily reversible, and do no damage to your stock VW. To help you stay in your budget, this guide attempts to present modifications in the order that will maximize the performance boost or drivability benefit per dollar you spend. Of course there are more involved VW performance and drivability modifications you could do, but this article focuses on mods that you can make to your stock VW in a course of a few hours or a
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