AI Weber Carburettor Conversion Kit for
the Sunbeam Alpine Series I-V
and the Sunbeam Rapier Series III-V


This is probably the best performance and drive-ability upgrade you can make to your Sunbeam Alpine.

Not just a collection of off-the-shelf components, the Weber 32/36 Carburettor conversion kit for the Sunbeam Alpine was developed as a project in partnership with Webcon UK Ltd., carefully selecting and tuning each component. The inlet manifold with its curved runners, unique to Alpine Innovations, is mated to the genuine Weber 32/36 DGV carburettor with an insulated spacer gasket. The unique jetting of the carburettor was established after 3 days of testing on Webcon’s rolling-road with the resulting customisation optimised for performance, fuel economy and drive-ability. A plenum chamber, ducting hose and K&N filter enables cooler air to be drawn into the carburettor, rather than air preheated by the exhaust manifold and engine. To complete the kit is the stainless steel throttle linkage, fuel filter and the necessary studs, nuts, washers, hose, clips etc.

An original Sunbeam Alpine Series 5 with twin Stromberg carburettors was used as the test car and testing of the original twin Stromberg setup provided a useful baseline comparison figures. The Weber Conversion was shown to outperform the Strombergs by 17% in like for like comparisons on the rolling road.

Original Rootes manifold compared with Alpine Innovations manifold.
Original Rootes manifold compared with Alpine Innovations manifold. Note the curved runners enabling better fuel/air flow and smoother path to the outer cylinders, reducing fuel/air flow imbalance.
"I'm running the dreaded log manifold...."
And THERE is your problem. I know you want to make what you have work, but the fact is, it won't... the physics are dead against it. That log manifold allows the mixture to stagnate out at the ends, and the cold manifold then allows the fuel out there to condense, consequently making the cylinders either very lean under low-flow conditions, and become very rich when initially increasing the flow (RPMs), because the fuel condenses at the ends of the 'log' at low flow, and gets flushed out at higher speeds. This explains your plugs... they foul because they get flooded by the raw fuel being splashed onto them because of the condensation, and therefore they don't fire properly... and then once you increase the RPMs it runs fine because it blows out the fuel and draws a normal mixture.

If there was a way to successfully heat that manifold hot enough, this wouldn't be as much of a problem, but even the water tube inside it doesn't get it warm enough at the ends to prevent this issue. That's why the Alpine Innovations manifold works better - because the runners are curved and run directly from the plenum to the cylinder ports, there is far less likelihood for the fuel to condense out. 
Puff4 – SAOCA (Kevin McLemore)

Note: This conversion kit is suitable for the Sunbeam Alpine Series I-V and the Sunbeam Rapier Series III-V (with minor adaptations). For Sunbeam Rapier Fastback, Hillman Hunter, Humber Sceptre and Singer Vogue please see our other kit offering for these models. Neither kit is suitable for engines with the cast-iron cylinder head.

*** Our Best Seller ***
Complete Kit including K&N Conical Filter

Everything you need to transform your driving experience.

Price: £847.30 exc. VAT / £1016.76 inc. VAT (UK Only).

Price: £754.53 exc. VAT / £905.44 inc. VAT (UK Only). Supplied with a lower cost air intake ducting hose.
Kit consists of New AI Alpine Manifold, Weber 32/36 DGV Carburettor ( Alpine Specific Jetting), Insulator Gasket Block, Plenum Chamber, Air Intake Ducting Hose 700mm, K & N Conical Air Filter,  Fuel Filter, 2ft. Fuel Delivery Hose, Jubilee Clips, Manifold Studs, Nuts, Washers, Throttle Linkage Kit, Adjustable linkage Rod, Self Tapping Screws etc.

Entry Level Kit

This entry-level kit does not have the advantage of the cold-air induction provided by the plenum chamber, hose and K&N filter and instead locates the air filter on top of the carburettor.

Price: £707.92 exc. VAT / £849.51 inc. VAT (UK Only).

Kit consists of New AI Alpine Manifold, Weber 32/36 DGV Carburettor ( Alpine Specific Jetting), Insulator Gasket Block, Fuel Filter, 2ft. Fuel Delivery Hose, 2 x Jubilee Clips, Redline 45mm Rectangular Washable Air Cleaner, Manifold Studs, Nuts, Washers,  Throttle Linkage Kit, Adjustable linkage Rod,  Self Tapping Screws etc.

Entry Level Kit - Harrington Le Mans
Entry level kit installed on Le Mans Harrington

Basic, EBay Special Kit

This is the basic conversion kit, comparable with conversion kits from other sources. It comes without the stainless steel throttle linkage and the carburettor is supplied without any of the jetting cutomisation of the other kits. It does however, include our unique AI inlet manifold with curved runners  and a block gasket to improve the thermal insulation between the carburettor and the manifold.

Price: TBA.

Kit consists of New AI Alpine Manifold, Weber 32/36 DGV Carburettor (Ford Mexico Jetting), Insulator Gasket Block, Fuel Filter 2ft. Fuel Delivery Hose, 2 x Jubilee Clips, Redline 45mm Rectangular Washable Air Cleaner, Manifold Studs, Nuts, Washers, etc.

AI Inlet Manifold Only

Our unique inlet manifold with curved runners is available for purchase separately when stocks permit. Please call for availability & pricing.

Options

Right Angled Adapter for PCV Valve £8.33 (exc. VAT)

Breather Pipe from Flame Trap to Air Intake £6.80 (exc. VAT)

Manifold Gasket £5.00 (exc. VAT)

Grub Screws for Inlet Manifold Ports £3.04 (exc. VAT)

Qty. 3 3/8″ UNC/UNF Manifold Studs, Nuts & Washers £8.20 (exc. VAT)

AC Glass Bowl Fuel Pump Repair Kit £13.33 (exc. VAT)

Shipping  Charges

Approximate shipping charges to ship a carburettor  conversion kit :

Within the UK £24.00 inc. VAT

To Australia £80.00, Belgium £43.00, Canada £75.00, France £46.00, USA £67.00.