Adjustable 930 wur website electricity explained


If you drive a Porsche 930 or 964 Turbo, you are probably well aware of the shortcomings of the Bosch K- Jetronic CIS fuel injection system electricity edison. While in its day it may have been a relatively simple and robust fuel system, it has become quite antiquated by today’s standards. In the quest for better drive-ability and more horsepower, many owners have upgraded their cars by adding aftermarket headers, larger turbochargers, more efficient intercoolers, increased boost, higher lift cams, ported intake manifolds, modified fuel distributors, and many more specialized pieces. But, without installing a stand-alone EFI system you are still stuck with the tune-ability issues of the gas 2015 CIS system.

An often overlooked component in the equation is the Warm Up Regulator (WUR). It is actually more appropriate to think of the WUR as a Control Pressure Regulator due to its never-ending role in the fuel delivery process. It does more than just regulate the warm-up stage, as it affects fuel delivery based ideal gas questions upon manifold pressure (boost) as well. Most Turbos can benefit greatly from tuning the WUR to match the engine’s modifications. This gas bloating will allow the engine to achieve the performance and Air/Fuel Ratios (AFRs) desired.

A new development has been made in extending the life of a WUR used on a highly boosted Turbo. Quite often the fuel metering diaphragm will fail, especially on cars running 1.0+ bar of boost. If you track your car, the constant on/off boost transitions are what tends to break the factory piece. When this happens, it allows raw fuel to dump out of the vent tube on the top of the WUR. Not only can this leave you electricity grid code stranded on a rural highway or ruin a DE track-day, it can potentially cause a major engine fire if the fuel ignites on the hot exhaust system gas bijoux discount code.

RPM control of the enrichment circuit has been developed in an effort to eliminate the absurdly rich mid-range condition exhibited by modified CIS Turbos. This condition is particularly noticeable on cars that are running a modified fuel distributor, aftermarket turbocharger, short-tube headers, 0.9+ bar of boost, and the Adjustable WUR. In order to have enough fuel for a proper 12.0 AFR at high RPM, the mid-range will typically be incredibly rich at the onset of boost. This is because the WUR enriches based upon boost gas x dosage pregnancy pressure alone, regardless of engine speed.

The RPM Controlled Solenoid Valve (CSV) remedies this problem by allowing you to select when the enrichment circuit is enabled. This is achieved by swapping chips on the gas and bloating after every meal RPM controller. By controlling when the WUR receives its boost signal from the intake manifold, a much flatter Air/Fuel Ratio (AFR) curve can be achieved. This results in improved throttle response and more mid-range torque and horsepower. A side benefit is improved gas mileage and extended engine oil life, as the oil is no longer diluted with any fuel laden blow-by at the onset electricity distribution companies of boost.

The dyno chart below shows typical gains at only 0.9 bar of boost. The blue curve represents a dyno run with a precisely tuned Adjustable WUR. The red curve has the enrichment delayed until 4200 RPM. These runs were made back-to-back with no other changes between runs. You might be wondering what happened to DYNORUN_006. DYNORUN_006 was made with a 4400 RPM module installed which caused the AFR to peak at nearly 13.0 just before the enrichment was enabled. This was deemed to be too lean. A 4200 RPM la gas module was installed and the car was re-run yielding the following results:

The Adjustable WUR modifications are available for different makes and models of automobiles which use the Bosch CIS injection system. I have made Adjustable WURs for Audis, Mercedes, Saabs, Volvos and other turbocharged and normally aspirated vehicles. I have also gas leak in car made Adjustable WURs for Porsche 924 Turbos and 911 SCs with great success.

If you would like an Adjustable WUR for your particular vehicle, the procedure bp gas prices akron ohio involves shipping me your existing WUR (or a spare if you have one) for modification and rebuild. This process normally takes about 1 to 2 weeks from the time I receive the unit. If you can provide me a detailed list of engine modifications including the intended boost level electricity tattoo designs for turbocharged cars, I can preset the Adjustable WUR to get you close to the optimal mixture settings for your engine. This will minimize the amount of fine tuning required.

Note: In order to make the 964 Turbo WURs (0 438 140 160 and 0 438 140 164) fully adjustable electricity projects for grade 7, the altitude compensation mechanism must be permanently removed from the WUR. This makes it function exactly as a 930 WUR does. Removing the altitude compensation feature usually goes unnoticed for most 964 Turbo owners, unless frequently traveling to regions with greatly differing altitudes (delta 5000 ft.).