do not press the back button…
Your Vehicle
Porsche // 924 (1977-1988) // 924S 2.5L 1986-87
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
Uprated Alternator / Generator
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
WOSP High Output 320A Alternator
The WOSP LMA370-HO is a high-performance 320-amp alternator
designed for Porsche 924S, 928, 944 and 968 models requiring increased
electrical power.
Fits:
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Part of WOSP's advanced 300 Series, it combines modern hairpin winding technology with a precision-machined billet aluminium housing, delivering exceptional electrical output from a compact, lightweight unit.
What Does It Do?
The alternator generates electricity while the engine is running, powering the vehicle's electrical systems and maintaining battery charge.
The WOSP LMA370-HO provides up to 320 amps of rated electrical output, offering significantly greater charging capacity than conventional alternators.
This makes it particularly useful for modified Porsche vehicles with increased electrical demands.
Why Upgrade to a 320A Alternator?
Standard alternators are designed around the electrical requirements of the original vehicle.
Modified Porsche engines and vehicles fitted with additional electrical equipment may require substantially more charging capacity.
The WOSP 320A alternator is particularly suitable for
applications involving:
- High-performance electric cooling fans
- Upgraded lighting systems
- Powerful audio equipment
- Motorsport electronics and data logging
- Additional electrical accessories
- High-demand electrical systems
Its increased output capacity helps support these accessories while maintaining battery charging during operation.
Advanced Hairpin Winding Technology
What makes the WOSP LMA370-HO special is its advanced 300 Series alternator construction.
Unlike conventional alternators using round copper wire, WOSP uses square-wire hairpin stator windings.
This technology allows more copper to be packed into the stator, increasing current density and enabling substantially higher electrical output within a compact housing.
The high-output version uses an uprated winding configuration to achieve its 320A maximum rating.
Precision Billet Aluminium Construction
The alternator housing is precision-machined from billet aluminium rather than using a conventional cast housing.
This provides a strong, compact construction designed to accommodate the advanced high-output electrical components.
Weighing approximately 5.3kg, the LMA370-HO combines high electrical capacity with a compact design suitable for selected Porsche installations.
Important High-Output Considerations
The LMA370-HO is designed to achieve its maximum output at higher alternator speeds.
Unlike some standard-output alternatives, high-output WOSP units require increased RPM to reach their rated charging capacity and may produce less current at idle.
The vehicle's charging cables, electrical connections, fusing and belt drive must also be suitable for the increased output.
For standard Porsche vehicles without additional electrical equipment, a lower-output WOSP alternator may be more appropriate.
When Should It Be Replaced or Upgraded?
Consider upgrading when:
- The existing alternator cannot support increased electrical demand
- Additional electrical accessories are being installed
- Battery charging becomes inadequate under heavy electrical load
- Building a modified road, track or competition Porsche
- Replacing a failed alternator with a higher-capacity alternative
Confirm the cause of charging problems before replacement, as wiring faults, battery condition and belt issues can produce similar symptoms.
Key Features
- WOSP Performance 300 Series alternator
- Maximum rated output of 320 amps
- Advanced square-wire hairpin stator technology
- Precision-machined billet aluminium housing
- Compact 5.3kg construction
- 12V electrical system
- 5PK pulley, reference LMP009
- Left-hand, three-lug mounting
- Designed for high electrical demand
- Suitable for selected Porsche 924S, 928, 944 and 968 models
Porsche 924S, 928, 944 & 968 High Output Alternators
High-output alternators provide increased electrical charging capacity for classic and performance Porsche vehicles fitted with additional electrical equipment.
The WOSP LMA370-HO 320A alternator combines advanced hairpin winding technology with a billet aluminium housing, making it a specialist upgrade for modified Porsche 924S, 928, 944 and 968 models.
Designed for demanding electrical applications, it offers substantially greater rated output than conventional alternators while maintaining a compact construction.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
LMA370-HO
The product you are viewing cross references to these numbers
Increased / Upgraded Output Alternators – Enhanced Charging Power for High-Performance Porsche Models
Increased or upgraded output alternators are designed to deliver higher electrical capacity than standard units, making them ideal for performance-focused Porsche owners or vehicles equipped with additional electrical accessories. Whether you’ve upgraded lighting, sound systems, or cooling components, a high-output alternator ensures consistent voltage and power delivery without straining your electrical system.
At Design911, we supply a premium selection of high-quality upgraded output alternators for Porsche models including 911, Boxster, Cayman and transaxle models. Each alternator is built for maximum charging efficiency, enhanced durability, and quiet operation, ensuring reliable electrical performance under high-demand conditions.
What Do Upgraded Output Alternators Do?
High-output alternators are designed to provide increased
amperage compared to standard units. Their main functions include:
- Delivering
higher current output for vehicles with extra electrical load.
- Maintaining
consistent voltage even under demanding conditions.
- Ensuring
stable battery charging when using upgraded accessories.
- Improving system reliability in performance or modified Porsche vehicles.
They are a popular upgrade for enthusiasts who require stronger charging capacity for high-power components, such as auxiliary lighting, advanced audio systems, or engine management electronics.
Why Do Alternators Fail?
All alternators, even high-performance versions, are subject
to wear over time due to mechanical and electrical stress. Common causes of
failure include:
Bearing
wear or brush degradation from prolonged use.
Symptoms of alternator issues include dimming lights, battery warnings, voltage instability, or loss of power to electrical systems.
Why Upgrade or Replace an Alternator?
Upgrading to a high-output alternator ensures your Porsche’s electrical system can handle increased demand, maintaining reliability and performance. Replacing a failing alternator prevents power interruptions and protects other electrical components.
Benefits of upgrading or replacing include:
Improved electrical performance and charging capacity. Stable voltage for aftermarket or high-power accessories. Prevention of battery drain or electrical faults. High quality construction for durability and precise fitment.All alternators in this range are engineered from high-grade materials with enhanced cooling designs and advanced winding technology, offering superior power output, reduced energy loss, and long service life.
1. What is a high-output alternator and how does it
benefit my Porsche?
A high-output alternator provides greater electrical
power than a standard alternator. It’s designed to handle increased electrical
demands — such as upgraded lighting, audio systems, or additional performance
electronics. Installing an upgraded alternator in your Porsche ensures stable
voltage, better battery charging, and reliable power delivery,
even under heavy electrical load.
2. Do I need an upgraded alternator for my Porsche?
If you’ve added aftermarket accessories like powerful
sound systems, LED lighting upgrades, or performance tuning electronics, a high-output
alternator is highly recommended. These upgrades draw more power than a
standard alternator can provide. Upgrading helps prevent voltage drops, battery
drain, and electrical system strain — ensuring your Porsche performs
reliably in all conditions.
3. How do I know if my alternator is failing?
Typical symptoms of a failing alternator include dimming
headlights, flickering interior lights, electrical malfunctions,
or a battery warning light on the dashboard. You might also experience difficulty
starting the engine or notice unusual whining or grinding noises. These
signs indicate your alternator may be struggling to maintain proper voltage
output and should be tested or replaced promptly.
4. Are high-output alternators safe for Porsche
electrical systems?
Yes — when correctly matched to your Porsche model, manufacturer-quality
high-output alternators are completely safe. They are engineered for
compatibility with existing electrical systems and designed to regulate voltage
efficiently. These alternators maintain proper current flow, ensuring safe
performance without overloading the wiring or battery.
5. How long does an upgraded alternator last in a
Porsche?
A high-quality, upgraded alternator typically lasts
as long as a standard one — usually 60,000 to 100,000 miles, depending
on usage and maintenance. Regularly checking the drive belt, pulleys, and
electrical connections can help extend lifespan. Using clean, high-grade
electrical components also reduces wear and ensures consistent performance.
