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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.

2275cc “Mild” Engine Combo, L5 Heads; Requires 1 5/8″ Exhaust and at least (2) 44mm Carburetors

We have put together a parts list for our most popular engine combos to make shopping easier for you. This list will give you a long block that is proven and tested to delivery! This particular engine combo will deliver a 150hp with ease! It will need dual Weber 44 IDFs, or dual Dellorto 40 or 45 DRLAs. This version of 2275 is NOT a “full tilt street build”. This is one you can drive every day without issue! This “milder” 2275 will result in a longer lived and easier to drive engine which will last a long time. This engine will also work really well in a bus!

During the mock up stage, you’ll have to order cylinder base shims to get the engine’s deck height between .040-.060″; we target .050″, so if you are off +-.010″ it’s not a big deal.

Use this list as a
>>> Read Full Article

2275cc Engine Combo, L6 Heads; Requires 1 3/4″ Exhaust and at least (2) 44mm Carburetors

We have put together a parts list for our most popular engine combos to make shopping easier for you. This list will give you a long block that is proven and tested to delivery! This particular engine combo will easily deliver 200hp with dual 48 IDFs, IDAs, or DRLAs, but we consider dual 44 IDFs or 45 DRLAs the minimum carbs needed for this engine. For example, to tune it down a notch, you simply can use L5 heads and a good 1 5/8″ exhaust along with a slightly milder camshaft. Or use a 1.1 rocker camshaft instead of shooting for almost .600″ of valve lift. This will result in a longer lived and easier to drive (Milder) engine.

During the mock up stage, you’ll have to order cylinder base shims to get the engine’s deck height between .040-.060″; we target .050″, so if you are off +-.010″
>>> Read Full Article

VW Super Beetle Shimmy – How to Find and Fix the Problem!

SB Suspension Diagram

VW SuperBeetle Shimmy (aka DEATH SHAKE): A Serious Problem — Not Just a Minor Annoyance!

In 1971, Volkswagen introduced the VW Super Beetle (aka: Model 1301), billing is as a nicer version of the tried and true Standard Beetle that had been used for over 50 years! The Super Beetle had a totally re-designed front suspension, which featured:

A Better Ride (quieter and smoother) A 50% Larger Fuel Tank Much Larger Trunk (almost 2x as large!) Tighter Turning Radius (because there is no axle beam in the way restricting the front tire turning angle!)

The Standard Beetle had a rigid axle beam, with torsion leaves (Springs) that were twisted inside each tube of the axle beam. These tubes and leaves ran across the front of the car. Unfortunately, this design cut right through the trunk and gas tank area, which is why the trunk and gas tank
>>> 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

Running Nitrous Oxide in a VW

Nitrous oxide can be used in your VW engine to create more horsepower. All engines operate under the same principles: better breathing, plus more fuel in a denser vapor equals more power. Using nitrous is not a whole lot different from using a bigger carburetor, a better manifold, a supercharger, or a turbocharger — all are methods to increase the amount of oxygen available for combustion. The air you and your engine breathe is made up, at sea level, of 78% gaseous nitrogen, 21% gaseous oxygen, and just 1% other gases. Nitrous oxide (N2O) is a liquid created by chemically bonding 2 molecules of nitrogen and 1 molecule of oxygen. When the nitrous oxide goes into your engine, the heat of combustion breaks the chemical bond which releases the oxygen and makes it available in a relatively high gaseous concentration compared to the concentration found in normal air,
>>> Read Full Article

Type 1 VW Transmission Conversion to Porsche 5 Speed

VW Tech Articles - Aircooled.Net Tech Talk

A Porsche 5 speed conversion is a nifty modification that makes your Type 1 VW really nice to drive! The Porsche transaxle is strong from the start because it is engineered for the power of a flat six engine. The close ratio gears of the Porsche tranny are able to keep your high performance engine in its power band, while the 5th gear ratio allows for easy highway cruising. However, this is not a “weekend mod” for newbies! The work involved in converting to a Porsche 5 speed tranny includes welding and custom fitment and should only be undertaken if you you have fabricating experience. You will also need to be prepared to do some fine tuning in order to achieve perfectly smooth shifting.

>>> Read Full Article

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.

>>> Read Full Article

VW Drag Racing Suspension

VW Racing - VW Drag Racing Suspension Tech Article

Drag Racing Suspension & Setup for Type 1 Aircooled VWs

In this article we cover some basic car setup for VW Drag Racing. The information in this article, properly applied, may be able to keep you from breaking and/or crashing your car, or at the very least keep you from scaring the living daylights out of yourself (and/or your spouse, track personnel, or spectators at the track!) This article is NOT a safety article intended to keep you from getting hurt IF you crash — For that we recommend you consult the NHRA rulebook. Many of the principles discussed apply to other cars, but since our specialty is rear engined VWs, that is the focus of the article.

>>> Read Full Article

VW Handling & Suspension Tuning

Suspension Tuning Tips for Type 1 Swingaxle Beetles, IRS Beetles and Buggies (Street and Auto-X)

My name is Greg Ward, I am a guest writer for Aircooled.Net, and I have a 69’ Std Beetle with IRS rear that I run in the Hillclimb circuits in Australia. Some of you may know of me from my posts in several of the Volkswagen related forums on the Internet. I have been racing these terrific cars for the last 12 years and hope to relay some of my knowledge on how to make these cars handle, corner, and stop well. I have broken it down into the 2 combinations I’m familiar with; Ball Joint Front with either a Swing Axle or IRS Rear. Let’s get started!

>>> Read Full Article

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
>>> Read Full Article