Rover V8 Carb Conversion Kits

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Part No.: GRID009123

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Webcon 4 x 44IDF performance kit for Rover V8 3.5 / 3.9

Webcon has offered a Weber manifold for the Rover V8 engine for some time, but with two carburettors positioned on each cylinder head this has sometimes proved a little too high for some applications.

Now Webcon has revised the design and positioned four Weber IDF carburettors in a line along the the manifold between the heads, much like the early Aston Martin V8, creating an overall lower profile.

The 44IDFs in the kit are supplied with the following "starting point" calibration which will allow the engine to start and run.

Venturi - 36mm
Auxilliary venturi - 4.5
Main jet - 135
Air corrector - 175
Emulsion tube - F11
Idle jet - 50
Pump jet - 50

To achieve maximum power, driveability and efficiency, we recommed that you have the carburettors calibrated on a rolling road.
Model-2wd or 4wd applications
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RB7725
Out of stock, expected soon. Add to cart and Back Order
£3,750.00 ex VAT£4,500.00 inc UK VAT
Quantity
The legendary Holley is an ideal choice for all engines up to 4.6 litres.
Supplied jetted to suit the standard 3.5 litre engine (primary jet 51, secondary
equivalent to 53 jet), it can be re-jetted to suit modified or larger capacity engines.
An adaptor plate kit is available for enlarging secondary jets.
The Edelbrock Performer Dual Plane Inlet Manifold offers up to 10 BHP over
other 4 barrel manifold options at high mid-range, with increased torque over
a wide RPM range, especially from idle to to mid-range.
It also offers excellent throttle response.
Due to its height, it may not offer sufficient under bonnet clearance where space is tight.
Kit Includes:
Holley 390cfm 4 Barrel Carb with Manual Choke
Edelbrock Dual Plane Inlet Manifold
14" Chrome Pancake Air Cleaner - 3" Deep (K&N Filter available at extra cost)
Thermostat Housing
Accelerator & Choke Cables

A Facet Fuel Pump (RB7259) is recommended (sold separately).
For Automatic Borg Warner SD1, a Kickdown kit (RTC117HOLLEY) is also available for the Holley kit.
Model-2WD Applications Only
Rate and Review this Product
RB77222WD
Out of stock, expected soon Jan 03, 2025. Add to cart and Back Order
£1,200.00 ex VAT£1,440.00 inc UK VAT
Quantity
The legendary Holley is an ideal choice for all engines up to 4.6 litres.
Supplied jetted to suit the standard 3.5 litre engine (primary jet 51, secondary equivalent to 53 jet), it can be re-jetted to suit modified or larger capacity engines.
An adaptor plate kit is available for enlarging secondary jets.
The Edelbrock Performer Dual Plane Inlet Manifold offers up to 10 BHP over other 4 barrel manifold options at high mid-range, with increased torque over a wide RPM range, especially from idle to to mid-range.
It also offers excellent throttle response.
Due to its height, it may not offer sufficient under bonnet clearance where space is tight.

Kit Includes:
Holley 390cfm 4 Barrel Carb with Manual Choke
Edelbrock Dual Plane Inlet Manifold
14" Chrome Pancake Air Cleaner - 2" Deep (K&N Filter available at extra cost)
Air Cleaner Spacer (1/2") for linkage clearance
Thermostat Housing
Accelerator & Choke Cables

A Facet Fuel Pump (RB7259) is recommended (sold separately).
For Automatic Borg Warner SD1, a Kickdown kit (RTC117HOLLEY) is also available for the Holley kit.
Model-2WD Applications Only
Rate and Review this Product
RB77222WDLOW
In stock
Most express orders ship today!
£1,225.00 ex VAT£1,470.00 inc UK VAT
Quantity
Previously marketed as Weber, the increased capacity Edelbrock 4 barrel 500cfm carb is best suited to larger capacity engines (4.6 litres +) but can be fitted to any Rover V8.
Supplied jetted to suit the standard 3.5 / 3.9 litre engine (primary jet .086, secondary .095, metering rods .065x.052 jet).
A tuning / calibration kit is also available for larger capacity and / or modified engines, which includes assorted jets and metering rods.
The Offenhauser JWR Dual Port Inlet Manifold offers the lowest profile where under bonnet clearance is restricted.
The dual ports design offers increased efficiency due to the primaries using the lower port (increasing gas speed) and since the secondaries use the upper port (which is shielded by the primaries), the gas is cooler, meaning a better fuel burn.
These benefits help to offset the efficiency lost due to the low profile design.

Kit Includes:
Edelbrock 500cfm 4 Barrel Carb with Manual Choke
Offenhauser JWR Dual Port Inlet Manifold
14" Chrome Pancake Air Cleaner - 2" Deep (K&N Filter available at extra cost)
Air Cleaner Spacer (1/2") for linkage clearance
Fuel Feed Banjo & Bolt
Thermostat Housing
Accelerator & Choke Cables.

A Facet Fuel Pump (RB7259) is recommended (sold separately).
Model-2WD Applications Only
Rate and Review this Product
RA13232WDLOW
This part has been superseded
Use RA13232WD
The legendary Holley is an ideal choice for all engines up to 4.6 litres.
Supplied jetted to suit the standard 3.5 litre engine (primary jet 51, secondary equivalent to 53 jet), it can be re-jetted to suit modified or larger capacity engines.
An adaptor plate kit is available for enlarging secondary jets.
The Edelbrock Performer Dual Plane Inlet Manifold offers up to 10 BHP over other 4 barrel manifold options at high mid-range, with increased torque over a wide RPM range, especially from idle to to mid-range.
It also offers excellent throttle response.
Due to its height, it may not offer sufficient under bonnet clearance where space is tight.

Kit Includes:
Holley 390cfm 4 Barrel Carb with Manual Choke
Edelbrock Dual Plane Inlet Manifold
14" Chrome Pancake Air Cleaner - 3" Deep (K&N Filter available at extra cost)
Thermostat Housing
Accelerator Cable & Adaptor
Choke Cable
5 Degree Carb Levelling Plate

A Facet Fuel Pump (RB7259) is recommended (sold separately).
Model-4WD Applications Only
Rate and Review this Product
RB77224WD
In stock
Most express orders ship today!
£1,300.00 ex VAT£1,560.00 inc UK VAT
Quantity
The legendary Holley is an ideal choice for all engines up to 4.6 litres.
Supplied jetted to suit the standard 3.5 litre engine (primary jet 51, secondary equivalent to 53 jet), it can be re-jetted to suit modified or larger capacity engines.
An adaptor plate kit is available for enlarging secondary jets.
The Edelbrock Performer Dual Plane Inlet Manifold offers up to 10 BHP over other 4 barrel manifold options at high mid-range, with increased torque over a wide RPM range, especially from idle to to mid-range.
It also offers excellent throttle response.
Due to its height, it may not offer sufficient under bonnet clearance where space is tight.

Kit Includes:
Holley 390cfm 4 Barrel Carb with Manual Choke
Edelbrock Dual Plane Inlet Manifold
14" Chrome Pancake Air Cleaner - 2" Deep (K&N Filter available at extra cost)
Air Cleaner Spacer (1/2") for linkage clearance
Thermostat Housing
Accelerator Cable & Adaptor
Choke Cable
5 Degree Carb Levelling Plate

A Facet Fuel Pump (RB7259) is recommended (sold separately).
Model-4WD Applications Only
Rate and Review this Product
RB77224WDLOW
In stock
Most express orders ship today!
£1,325.00 ex VAT£1,590.00 inc UK VAT
Quantity
Previously marketed as Weber, the increased capacity Edelbrock 4 barrel 500cfm carb is best suited to larger capacity engines (4.6 litres +) but can be fitted to any Rover V8.
Supplied jetted to suit the standard 3.5 / 3.9 litre engine (primary jet .086, secondary .095, metering rods .065x.052 jet).
A tuning / calibration kit is also available for larger capacity and / or modified engines, which includes assorted jets and metering rods.
The Edelbrock Performer Dual Plane Inlet Manifold offers up to 10 BHP over other 4 barrel manifold options at high mid-range, with increased torque over a wide RPM range, especially from idle to to mid-range.
It also offers excellent throttle response.
Due to its height, it may not offer sufficient under bonnet clearance where space is tight.

Kit Includes:
Edelbrock 500cfm 4 Barrel Carb with Manual Choke
Edelbrock Dual Plane Inlet Manifold
14" Chrome Pancake Air Cleaner - 3" Deep (K&N Filter available at extra cost)
Fuel Feed Banjo & Bolt
Thermostat Housing
Accelerator Cable & Adaptor
Choke Cable
5 Degree Carb Levelling Plate

A Facet Fuel Pump (RB7259) is recommended (sold separately).
For Automatic 4x4, a Kickdown kit (RA1323 4WD KD) is also available for the Edelbrock kit.
Model-4WD Applications Only
Rate and Review this Product
RA13234WD
In stock
Most express orders ship today!
£1,300.00 ex VAT£1,560.00 inc UK VAT
Quantity
Rate and Review this Product
RA13234WDKD
In stock
Most express orders ship today!
£180.00 ex VAT£216.00 inc UK VAT
Quantity
Rover V8 4 x Weber 45DCOE Crossram

Webcon 4 x 45DCOE Crossram performance kit for Rover V8 3.5 / 3.9

Produced in conjunction with one of the UK's leading Rover V8 specialists, PRV402 features a superb quality UK manufactured crossram intake manifold and 4 genuine Spanish Weber 45DCOE carburettors to produce phenomenal power in applications where space is at a premium.

The kit is supplied with thermostat housing and a new throttle cable and custom designed throttle quadrant to ensure smooth and reliable throttle pedal action.

The height of the kit from the top of the intake port to the highest point on the carburettors, is 200mm, and the overall width including the standard length 45DCOE air horns, is 500mm.

The 45DCOEs in the kit are supplied with the following "starting point" calibration which will allow the engine to start and run:
  • Venturi: 36mm
  • Auxiliary venturi: 4.5
  • Main jet: 145
  • Air corrector: 155
  • Emulsion tube: F16
  • Idle jet: 55F8
  • Pump jet: 45
To achieve maximum power, drivability and efficiency, we recommend that you have the carburettors calibrated on a rolling road.
Model-Rover V8
Rate and Review this Product
RB7726
Out of stock, expected soon. Add to cart and Back Order
£3,575.00 ex VAT£4,290.00 inc UK VAT
Quantity
12 month warranty
Worldwide shipping
Price Match
Customer Comments
"Regular customer and it's great to be able to find a good range of parts for our Stag and TR5." Customer Comment
Product Description

Rover V8 Carb Conversion Kits
4 Barrel Carb Conversion
The simple, cost effective, bolt-on performance upgrade that is a direct replacement for the twin Stromberg or SU carbs offering easy starting, smooth running, transformed drive-ability and enhanced fuel economy. A 4 barrel conversion will work well on its own, or in conjunction with an uprated cam or cylinder heads and can be re-jetted to suit if required. Often the ideal solution for V8 conversions too, for TR7, MGB, Kit Cars etc where under bonnet space is at a premium.
We offer several conversion kits for just about all applications and engine sizes, utilising either the Holley 390 or Edelbrock 500 carb paired with an inlet manifold and air cleaner to suit your performance and under bonnet clearance requirements.
To match your application, select a carb, inlet manifold and air cleaner from the options above.

Note that we also supply items separately if required. Refer to 4 Barrel Carb Components and to Rover V8 Engines 4 Barrel Air Cleaners.

4 Barrel Carb Conversion Kits include:
Carb & inlet manifold
14" chromed air cleaner (K&N at extra cost)
Thermostat housing
Accelerator and choke cable kits
5° carb levelling plate/accelerator cable adaptor for 4x4 applications
1/2" spacer (to allow clearance for linkages) for 2" filter kits

Note: A Facet fuel pump (RB7259) is recommended (sold separately).