CSF Porsche 964 Three piece package

Design & Engineering

Most factory A/C condensers from the 80s and 90s are now outdated in both design and materials. They were originally designed for R12 refrigerant, which offered far superior performance compared to today's more environmentally friendly R134a. Even a brand-new OEM condenser can't fully compensate for this drop in performance. That's where CSF steps in.

CSF has decades of experience designing and manufacturing A/C Condensers. This latest classic series product was designed in collaboration with our industry partners at A/C Solutions. CSF has once again applied modern design and manufacturing techniques to these classic Porsche platforms. The result is a condenser that fits perfectly, outperforms the factory system by a significant margin, and costs less than a new OEM unit.

CSF vs OEM

The new 964/993 Condenser utilizes a modern parallel-flow core design. parallel-flow condensers are far more efficient than old serpentine style designs like the OEM unit for the 964/993.

Key Differences and Improvements:

• Increased performance: Approximately 5% better performance than a brand-new OEM condenser and much larger improvement over a clogged or dirty unit that has been installed for some time.
• Optimized for R134a: Helps recover some of the cooling power lost in a refrigerant conversion
• Improved Durability: More robust design and construction materials
• Less Expensive: Around half the price of a new Genuine Porsche unit

Why Upgrade?

Whether you are restoring a 964 or 993 to show-car condition or upgrading your weekend toy for modern comfort, CSF's OEM+/Performance A/C Condenser is a no-brainer. It is a straight forward plug-and-play installation, more efficient, and built to last.

Design & Engineering

CSF has decades of experience designing and manufacturing A/C Condensers and has leveraged that knowledge to design its first high performance Evaporator. Most factory A/C evaporators from the 80s and 90s are now outdated in both design and materials. They were originally designed for R12 refrigerant, which offered far superior performance compared to today's more environmentally friendly R134a. Even brand-new OEM evaporators are not efficient enough to provide a proper temperature differential with R134a. That's where CSF steps in.

The CSF engineers have once again applied modern design and manufacturing techniques to this classic Porsche evaporator. Working closely with Motorsport Inc as a development partner, CSF was able to test, measure, and develop the new evaporator with both old and new OE units as well as a now discontinued Griffiths evaporator for reference. Test fitting was done in the full HVAC Suitcase courtesy of the team at Motorsport Inc.

The result is an evaporator that fits perfectly, outperforms the factory system by a significant margin, and costs less than a new OEM unit. Based on testing, the CSF Evaporator fits and seals 2 times better than the factory or discontinued Griffiths units. A better seal means more airflow over the evaporator and in turn, better AC performance.

Key Differences and Improvements:

• Increased performance: Approximately 2x better performance than a brand-new OEM evaporator and much larger improvement over an oxidized and corroded unit that has been installed for some time.
• Optimized for R134a: Helps recover some of the cooling power lost in a refrigerant conversion.
• Improved Durability: More robust design and construction materials.
• Less Expensive: Around half the price of a new Genuine Porsche unit.
• Anti-Corrosive Finish: No more white flakes/dust particles from an old oxidized unit. New OE units don't come with any coating so they quickly develop oxidation and corrosion requiring replacement.

CSF vs OEM

The new 964/993 Evaporator utilizes a modern parallel-flow dual core design. Parallel-flow evaporators are far more efficient than old serpentine style designs like the OEM unit for the 964 and 993. These new cores feature CSF's Super-High Pressure Multi-Channel Microtube for Optimal Flow and Maximum Surface Area Contact.

The CSF evaporator also features an anti-corrosive powder coat finish so there is no chance of oxidation or corrosion in the future. Corrosion and oxidation are what leads to the common white flakes/dust particles that blow from the vents of the 964 and 933.

No more White Flakes

For the first ~25 years, since the introduction of the 964, the original Behr/Mahle evaporators came with an anti-corrosion coating from the factory. Over time that coating has worn down and caused evaporators to corrode and oxidize. Normally a factory replacement will buy you plenty more years of good service. However, factory clear anti-corrosive coating for the evaporators was banned in the last ~5 years due to environmental restrictions, so any new OE unit no longer comes coated from the factory.

No coating means a new OE evaporator will begin oxidizing and corroding immediately. Many owners and builders have had their A/C systems turn into snow blowers within just a few months of installing brand new OE units. This issue plagues everyone from DIY inclined owners to the most prestigious and notable Porsche restoration companies.

The CSF Evaporator was designed to solve this issue for good. The anti-corrosive powder coat finish offers the ultimate form of protection from oxidation and corrosion. Installing the CSF unit will give you the peace of mind that you won't ever have to worry about your evaporator again. If you've ever had to replace one of these, you know the value of never having to do it again. The HVAC Suitcase, which houses the evaporator, sits behind the dash and requires a significant amount of labor to remove and reinstall.

White flakes/dust Examples

CSF vs Griffiths Kuehl

Motorsport Inc was able to provide the CSF Engineering Team with a discontinued aftermarket evaporator from Griffiths. The Kuehl High Performance AC Evaporator was the go to replacement for 964 and 993 owners for many years. It offered improved A/C Performance as well as an anti-corrosive coating so owners didn't have to deal with the dreaded snow flakes. However, these were discontinued over 5 years ago and there have been no alternatives since.

The Griffiths design was definitely better than the extremely dated mechanical design used in the OE unit. However, there was still plenty of room for improvement. The Kuehl Evaporator utilized a triple pass tube and fin design. While this was more efficient than the OE serpentine tube style, the triple pass design causes more back pressure than a single pass design like the CSF Evaporator uses. This back pressure raises the temperature of the refrigerant lowering the overall efficiency.

There was also more space between each core than ideal, causing additional airflow restrictions. This empty space also reduces the overall refrigerant capacity. The CSF Engineers designed the dual cores to sit as close to each other as possible offering the best possible airflow and maximizing refrigerant capacity. CSF's Super-High Pressure Multi-Channel Microtubes also offer increased performance over the basic tube design of the Kuehl Evaporator.

Why Upgrade?

Whether you are restoring a 964 or 993 to show-car condition or upgrading your weekend toy for modern comfort, CSF's OEM+/Performance A/C Evaporator is a no-brainer. No more white flakes/dust blowing out of your vents and no chance of it happening in the future. This is the best and current only solution to a proper functioning A/C system for the 964 and 993. You and your Porsche deserve the best, and CSF delivers.

Premium Packaging

Each cooler is packaged in a premium box with laser cut foam inserts. You can be confident your AC Evaporator is protected and secure as it is shipped.

Pair with the CSF 964/993 A/C Condenser

If you have already upgraded the rest of your Air Conditioning system, this may be the final piece. However, if you are just starting your overhaul, this pairs perfectly with the 964 / 993 OEM+ Performance A/C Condenser (CSF #8325). Especially for anyone doing a full R134a conversion.

⚠ Fitment Notes

Evaporator Temp Sensor:

To install the factory evaporator temperature sensor (OE# 964-618-943-00) may require minor modifications. To install the sensor, CSF recommends following the following steps:

1. Cut the wires in a place easy to reconnect.
2. Install the sensor in the factory location making sure the end of the sensors goes between fins on the evaporator.
3. Run the wire outside the suitcase.
4. Reconnect the wires for the sensor using butt connectors or soldering.

Both the 964 and 993 ran hotter than earlier air-cooled 911s for a variety of reasons. Increased performance output, new emissions regulations, and limited space in the engine bay were all contributing factors. Porsche was definitely stretching the limits of air/oil cooling. Especially given the cooling technology and design of that day and age.

Following the incredible success and enthusiastic response to the CSF 911/930 Turbo Fender Oil Cooler (#8168), CSF has expanded its Porsche performance lineup with a modern OEM+ upgrade for the last of the air-cooled 911s. Introducing the all-new CSF OEM+ Performance Engine Oil Cooler for the Porsche 964 and 993.

Design & Engineering

To develop a truly modern cooling solution for the 964 and 993, CSF once again partnered with Porsche engine building and restoration experts at SV Auto. Their deep expertise in engine restoration and air-cooled performance provided CSF with key insights that shaped the design of this next-gen cooler. Leveraging technology from the best selling G-Body Engine Oil Cooler (a project that took over 18 months and a $20,000+ R&D investment) this new cooler brings the best modern engineering to the 911.

Engineered to fit seamlessly into concours-winning restorations, this CSF oil cooler retains a factory-style look while delivering cutting-edge performance and technology. Whether you're restoring a classic 964/993, building a high-horsepower restomod, or prepping a car for the track, this is the ultimate OEM+ and performance cooling upgrade for your 911.

Trusted by World Renown Shops & Builders

Pfaff Tuning has been working with the 964 platform to pursue true OEM+ perfection since 2012. They have created a unique Bespoke program aimed at delivering the ultimate driving and ownership experience for 964 enthusiasts. Their expert team handles everything from standard maintenance to full restorations and custom builds. Pfaff Tuning uses only genuine OEM Porsche parts or the highest quality aftermarket upgrades like the CSF OEM+ Performance Oil Cooler.

First impressions of unboxing the cooler were of the high level of quality. Fitment was no different. All the OEM lines, shroud and hardware fit perfectly in place as if the cooler was OEM. We look forward to using these coolers on all our 964 project cars going forward. Using any oil cooler other than CSF just makes no sense.

CSF vs OEM

The original Längerer & Reich oil cooler for the Porsche 964 and 993 was designed back in the 1980s. While it was cutting-edge at the time, it has definitely started to show its age. Even though OEM replacements are still available through the Porsche Classic program, they are built with the same outdated technology and materials as they were 30+ years ago. Replacing a clogged or failing unit with a OEM cooler may fix the immediate issues, but it won't deliver any real improvement in performance or reliability.

Key Features

The new CSF oil cooler for the 964 and 993 is a true OEM+ upgrade, engineered with modern cooling technology. Its advanced core offers multiple advantages over the original tube and fin design:

• Innovative Rolled Fin Design - Stronger/more durable and Less Clogging
• Wider air passages for improved flow
• 10% Increase in airflow
• 16% Larger Core Volume
• 6% Increase in Heat Dissipation
• No change in oil pressure vs OEM

Clogged Core on OEM Cooler vs CSF Cooler

The TIG-Welded 100% All Aluminum construction increases the overall strength of the oil cooler. This improves durability and longevity so you can be confident it will hold up to hard driving conditions. It is designed to be a "drop-in fit" solution; mounting in the factory location, working seamlessly with the original fan, and requiring no modifications or cutting. CSF also improved the design of fan shroud mounting locations for easier installation.

M30 x 1.5 High-Flow Fittings

CSF drew additional inspiration from its proven 911/930 Turbo Fender Oil Cooler (#8168), incorporating similarly engineered Widemouth fittings. These precision machined, threaded M30 "Widemouth" fittings are designed with an optimized inner diameter (ID) to dramatically improve oil flow.

These fittings deliver up to 50% greater flow capacity compared to OEM connections. Each stainless steel fitting is crafted in-house for superior strength, durability, and long-term reliability under pressure. To ensure a perfect, leak-free seal, CSF pre-installs the fittings with high-quality copper crush washers.

14.5mm ID of the OEM Fittings vs CSF 17.5mm ID "Widemouth" Design

Comparison between CSF's high-flow fittings w/ 17.5mm ID widemouth design vs. the OEM 14.5mm ID design

Premium Packaging

Each cooler is packaged in a premium box with laser cut foam inserts. You can be confident your oil cooler is protected and secure as it is shipped.

An Upgrade for everyone

Whether you're restoring a 993 or 964, building a high-performance restomod, or just upgrading for peace of mind, the CSF oil cooler delivers the durability and cooling performance your engine deserves.