Revving up your 88 cubic inch Harley with a new camshaft can feel like unlocking a whole new world of roaring power and seamless operation. But how do you navigate the maze of options to choose the ultimate cam?
That’s where we step in, Harley enthusiast to Harley enthusiast, to guide you through the choices. Whether it’s the best cam for twin cam 88 or the cream of the crop for a stock twin cam 88, we’ve done the groundwork to clear the path for your lush ride.
Gathered from countless hours in the garage and extensive tests on the open road, we bring this insight not just from our workbenches, but also straight from our hearts. So buckle up, let’s kick-start this journey together and discover the best cam for 88 cubic inch Harley engines. First, let’s cover some of the basics of how a camshaft works so you can understand why we made the choices we did.
Another 88″ Upgrade Worth Checking Out: Best Tuner for Harley 88 ci Engines: An Expert’s Picks
Chase’s Pick
S&S 625 Cam Kit
My Favorite Because:
- Uses the most OEM parts out of other alternatives
- The kit includes everything you need for installation
- optimal “every day riding” power increase (between 3k-6k RPM)
Skip To The Other Reviews
Table of Contents
What is a Cam?
A cam, or camshaft, is a crucial component in your Harley’s engine. It’s responsible for opening and closing the valves that let air and fuel into your engine, and exhaust out of it. The timing, duration, and lift of these valve events can dramatically affect your Harley’s power, torque, and overall performance.
Camshaft Basics
The important factors to consider here:
- How a camshaft works
- Camshaft lift, and what it is
- Camshaft duration and what it is
So, let’s keep moving!
Working of a Camshaft
When the engine turns, the camshaft rotates, pushing against the valves and causing them to open. Once the cam lobe moves past the valve, the valve closes due to spring tension. The pattern in which the valves open and close directly impacts your Harley’s performance.
Camshaft Lift
The “lift” of a cam refers to how far it opens the valves. A higher lift can allow more air and fuel into the cylinders, potentially increasing power. However, a cam with too high of a lift can cause valve and piston interference, damaging the engine.
Camshaft Duration
“Duration” refers to the amount of time the valves are open. A cam with a long duration can increase high RPM power but may cause a loss in low RPM torque. Conversely, a short duration cam can improve low RPM torque but may limit high RPM power.
Choosing the Best Cam for 88 Cubic Inch Harley
Choosing the right cam for your 88 cubic inch Harley will depend on several factors, including your riding style, the type of riding you do, and any engine modifications you’ve made.
Riding Style
Do you ride aggressively, or are you more conservative? An aggressive rider may benefit from a cam that increases power at higher RPMs, while a more conservative rider might prefer a cam that boosts low RPM torque for smoother cruising.
Type of Riding
Do you mostly ride alone, or do you often have a passenger? Do you mainly ride around town, or do you frequently go on long highway trips? These factors can influence the cam choice as well.
Engine Modifications
If you’ve made any engine modifications, these could affect the cam choice. For instance, increasing the engine’s compression ratio can make it more compatible with a cam with a longer duration.
The Best Cam Choices for 88 Cubic Inch Harley
Here are some of the best cam choices for 88 cubic inch Harley, based on the various riding styles and needs we discussed earlier. These can be found in complete kits, chain drive cams, or gear driven cams.
Best Cam Kits for 88ci Harley Twin Cam
S&S 625 Cam Kit
Key Features
- Versatility in Installation: This cam kit is adaptable, offering both chain and gear drive versions to suit different preferences and setups.
- Efficient Setup: The installation process is streamlined, allowing for the reuse of numerous stock components, saving time and effort.
- Comprehensive Package: The kit is all-inclusive, providing cams, a gear cover gasket, cam bearings, and clear instructions for installation.
- Optimized Power Range: This cam is designed to enhance performance primarily in the 3000-6000 RPM range, delivering a noticeable boost in power.
S&S 585 Cam Kit
Key Features
- Hassle-Free Installation: Like the 625 kit, this cam kit is designed for quick installation, reusing many of the bike’s original parts.
- Complete Kit Contents: The package includes everything needed for installation: cams, a gear cover gasket, and cam bearings, along with instructions.
- Power and Torque Enhancement: This cam delivers significant increases in both horsepower and torque, starting from 3000 RPM and maintaining performance up to redline. It is versatile, performing well in 88″ – 103″ engines from 3500-6000 RPM and in larger engines from 2500-5500 RPM
Best Andrews Cam For Stock 88 Twin Cam
Andrews 60H Camshafts
Key Features
- Designed for Roller Chain Drive: This camshaft is specifically developed to work seamlessly with the roller chain style drive.
- Compatibility with Stock Components: It is designed to be used with Harley-Davidson’s stock hydraulic lifters.
- Potential for Power Boost: With proper tuning, this camshaft can unlock over 80 rear wheel horsepower in an 88 cubic inch engine.
- Balanced Performance: Expect a smooth idle and a broad torque range, contributing to a more enjoyable and controlled riding experience.
Best Bolt-In Cam for Twin Cam 88
Fueling 525 Cam Kit
Key Features
- Broad Torque Delivery: This cam is engineered to provide a wide torque curve, ensuring consistent power delivery across different RPM ranges.
- Designed for OEM Components: Intended for use with the bike’s original hydraulic lifters and chain drive, ensuring compatibility and reliability.
- Inclusive Cam Kit: The package includes a roller bearing along with the cam, providing all necessary components for installation.
Best Gear Drive Cams For Harley Twin Cam 88
Andrews Gear Drive Cams
Key Features
- Torque and Fuel Economy: These cams are crafted to broaden the torque bandwidth and enhance fuel efficiency.
- Bolt-In Convenience: They are designed as bolt-in camshafts, simplifying the installation process.
- Consistent Power Delivery: Expect a strong performance in both low and mid-range power, with a linear horsepower and torque curve.
- Compatibility with Stock Parts: These cams can be used with the factory valve springs, pushrods, and lifters, ensuring a smooth integration with existing components.
- Enhanced Throttle Response: Experience improved throttle response and easier starting with these gear drive cams.
- Versatile Power Range: Designed to perform across a wide RPM range, from 1750-5800 RPM
Understanding Your Bike’s Compression Ratio and Displacement
It’s important to match your cam to your engine’s compression ratio and displacement. A mismatch can lead to less than optimal performance and potentially damage your engine.
Proper Tuning is Crucial
Once you’ve chosen and installed your new cam, proper tuning is essential. This will ensure that your bike runs smoothly and achieves the performance gains you’re looking for.
The Takeaway
Choosing the best cam for your 88 cubic inch Harley can significantly enhance your riding experience. By understanding your riding style, the type of riding you do, and any engine modifications you’ve made, you can pick the cam that is ideal for your needs. Either way, regardless of the cam you choose, you’re sure to notice a boost in your Harley’s performance.
Frequently Asked Questions
What is the best cam for an 88 cubic inch Harley?
The best cam for an 88 cubic inch Harley depends on your riding style, type of riding, and any engine modifications. Options like the S&S 625 Cam Kit and Andrews 60H Camshaft are popular choices.
How does upgrading the cam affect my 88 cubic inch Harley’s performance?
Upgrading the cam can significantly enhance the power, torque, and overall performance of your Harley, especially in specific RPM ranges.
How do I choose the best cam for my Twin Cam 88 Harley?
Consider your riding style, the type of riding you do, and any engine modifications. A cam that suits aggressive riding and high RPMs may differ from one that enhances low RPM torque for smoother cruising.
What is the best cam for a stock Twin Cam 88 engine?
The Andrews 60H Camshaft is a popular choice for stock Twin Cam 88 engines, providing a smooth idle and broad torque.
Do I need to make any modifications to install a new cam on my stock Twin Cam 88?
Some cams may require additional modifications or specific installation kits. It’s important to follow the manufacturer’s recommendations and consult with a professional if unsure.
Is it worth upgrading the cam on an older Twin Cam 88 model?
Yes, upgrading the cam can breathe new life into older models, improving performance and ensuring smoother operation.
What does “bolt-in” cam mean for a TC88?
A “bolt-in” cam is designed to be installed without the need for additional modifications or machining, making the installation process simpler.
