Lotus Marques

Lotus Marques - News

The latest product news from Lotus Marques.

Lotus Twin Cam timing chain tensioner bracket 026E0012

Saturday, 30 November 2024 13:51 Product News
This timing chain tensioner bracket has been fully CNC machined from high tensile steel alloy 4140 and is suitable for a Lotus twin cam engine built on a Ford 701M cylinder block.
The steel bracket is a direct replacement for the original bronze component (part number 026E0012).
The timing chain bracket shown below has a small rectangular protruding pad.
The sprung loaded tensioner piston applies pressure to the pad located at the end of the bracket which in turn tensions the timing chain via the attached sprocket.

Lotus twin cam timing chain tensioner bracket for 701M block

For large capacity Lotus twin cam engines built on a Ford 711M tall cylinder block, the overall length of the tensioner bracket has been extended.
This guarantees the tensioner piston is going to make contact with the pad when the cylinder head is installed on a taller cylinder block.
Note – installing a Lotus twin cam cylinder head on a tall block results in moving the tension bracket pad upwards by 6mm or 12mm and away from the tensioner piston.

Lotus twin cam timing chain tensioner bracket for 711M block

These high quality components have been carefully designed to provide additional strength and reliability for street and race applications.
A simple bronze bush is installed in the bracket to ensure the pivot pin has a low friction bearing surface that is lubricated with engine oil.

Tensioner-bracket-shown-in-SolidWorks-CAD-wire-frame

These brackets are zinc plated and passivated to provide long term corrosion protection.

Vehicle application details - to suit Ford Lotus twin cam 1558cc, 8 valves
Model Production dates
Ford Lotus Cortina Mk1 1963 to 1966
Ford Lotus Cortina MK2 1967 to 1970
Lotus Elan 1962 to 1974
Lotus Elan 2+2 1968 to 1974
Lotus Europa Twin Cam 1968 to 1974
Lotus and Caterham 7 1973 to 1974

Tensioner bracket 701M or 711M @ $165.00 excluding GST
Tensioner plunger, 026E0010 - standard length $29.50 excluding GST
Tensioner plunger, 026E0010 - extra long @ $29.50 excluding GST
Adjuster screw, 026E0391- standard length @ $9.70 excluding GST
Adjuster screw, 026E0391- extra long @ $12.00 excluding GST
Tensioner sprocket assembly, 026E0707 @ $66.00 excluding GST
Tensioner sprocket pin, 026E0013 @ $27.50 excluding GST
Tensioner pivot pin, 026E0011 $27.50 excluding GST
Timing chain guide, A026E0014 $32.00 excluding GST

Please note carefully, pricing above does not included postage and packing.
Pricing information is correct as of 25/11/2024 but may alter with time and currency exchange rate fluctuations.
Shipping from Australia to UK, USA, New Zealand, anywhere worldwide!
Contact Lotus Marques now for postal or courier shipping costs.

Lotus Elan and Elan +2 alloy steering rack mount kit

Thursday, 14 March 2024 11:05 Product News
Solid mounting kit for the Lotus Elan and Elan +2 steering rack

Bump steer is best described as “a change of wheel direction without any input from the steering wheel”.
Bump steer adjustment is usually made by adding or subtracting shims directly underneath the steering rack mounts.
The standard steering rack mounts on a Lotus Elan or Elan +2 are derived directly from the Triumph, Spitfire, GT6, etc.
At the time of production, the Lotus Factory used much of the Triumph front suspension and associated steering rack components.
The Triumph donor sourced components were a simple and cost effective solution that results in the direct steering experienced when driving an Elan or Elan +2.

Whilst this combination of components produces satisfactory results, however it does mean the steering rack is rubber mounted and this can result in some undesirable movement.
To eliminate all steering rack movement and obtain the optimum bump steer results, then it is advisable to remove the rubber mounts and replace them with solid mounts. It should be noted that removing the rubber mounts does not result in excessive noise transmitted back into the cabin.

Lotus Elan steering rack alloy mounts

These aluminium alloy mounts are safety critical components and are correctly designed to prevent lateral movement or rotation of the rack assembly.
Accurate measurements ensure the steering rack centre-line to chassis platform distance is correct.
This is important so optimum bump steer adjustment is achieved.
Lotus Marques can supply stainless steel shims so Lotus Elan owners can make their own adjustment.

It is worth noting our UK competitors continue to produce unsafe components that are made from castings or aluminium clamps that are too narrow.
Both of these offerings demonstrate a lack of understanding of what it takes to design safe components that eliminate steering rack lateral movement.

Lotus Marques takes safety seriously and uses SOLIDWORKS® 3D CAD software to ensure the aluminium clamps fasten the rack securely and locate the fasteners perfectly in the existing chassis holes.
Using SOLIDWORKS® 3D CAD software ensures a high quality alloy component is produced when CNC machined.
The choice of aluminium alloy 6061 guarantees a high strength component and longevity.

During installation it is important to orientate the clamps so the thicker part faces outwards to make physical contact with the limiting flanges.

Lotus Elan steering rack mounting kit

To install the steering rack correctly, the pinion gear should be turned to the straight ahead position. This is determined by moving the rack to the full extent in both directions and counting the number of pinion gear revolutions and then dividing by two. The pinion gear should then be turned to the mid-point to set the straight ahead position. Once the straight ahead position has been set, the steering rack and alloy mounts should be installed in the corresponding holes. The tie-rod lengths should then be initially adjusted so the front wheels are parallel. Weight = 660 grams for a pair of mounts

Stainless steel shim 0.040 inch, part number LM-A036H0060 @ $5.40 each
Stainless steel shim 0.021 inch, part number LM-A036H0061 @ $5.40 each

Pricing for a pair of aluminium mounts and mounting kit (including Allen screws, Nyloc nuts and washers) $175.00 excluding GST.
Pricing is correct as of 11/3/2024

Installation advice
It is recommended that the chassis mounting platform for the steering rack be carefully measured to check the channel width and the spacing of the fastener holes.
Unfortunately back in the 1960's when the Lotus Elan chassis was manufactured, there were no flat bed laser cutters or CNC bending machines for sheet metalwork.

From experience, using a manual bending machine it would be easy to introduce dimensional errors whilst folding the supporting channel.
The length of the aluminium alloy mount is 75mm and this should be a snug fit when located in the chassis channel.
Next is to check the fastener centre to centre dimension which should be 42mm. Dummy installing the alloy clamp, the fasteners should line up with the holes in the chassis.
If your chassis suffers badly from manufacturing tolerances, then it may be necessary to carry out some minor fettling to get the clamps to fit snugly within the channel.


Copyright © 2024 Lotus Marques

Lotus Elan +2 replacement internal steel sills

Friday, 29 December 2023 12:25 Product News
Lotus Elan +2 internal sill replacements for 050BA0002RH and 050B0002LH

Both the Elan and Elan +2 share a similar stressed steel skin chassis.
The signature for this is a large rectangular box section that runs through the central tunnel area which conceals the prop-shaft.
Despite sharing a similar chassis, both the Elan and Elan +2 require additional strengthening hidden within the body.
The Elan has a reinforced steel rod ladder frame bonded into the fibre-glass body.
This bonded ladder frame spans the entire length of the body immediately below the lower part of the door aperture.
The Elan +2 has a steel box section that spans the entire length of the lower sill and is conveniently secured between the floor-pan and external fibre-glass body.
Unfortunately the steel box sections are prone to corrosion and can cause interference problems when the doors are opened or closed.
It is recommended that the condition of both steel box sections be checked as a part of any pre-purchase inspection.

 sills-1r   elan-2-sills2r

If you do discover the steel sills need replacing, then Lotus Marques is here to help you with a comprehensive kit.
The kit has been carefully designed and constructed to produce a high quality turn-key solution.
The two piece steel sill section has been drawn using SOLIDWORKS® 3DCAD software.
This 3D CAD software is now an industry standard and is used in the design and engineering phases of manufacturing.
This powerful tool has allowed the sill assemblies (complete with mounting plates and fasteners) to be modelled on screen.
The modelling process provides an opportunity to check all the parts prior to laser cutting, folding and welding.

The main two piece sill section is made from Zinc seal steel sheet and spot-welded the entire length to maximise Torsional strength.
Zinc steel sheet was chosen for its ease of bending, corrosion resistant coating and surface ability to accept a high quality paint finish.
Additional corrosion protection has been provided by powder coating the entire sill section.

The kit contains the following components-
1)    Right-hand sill section complete with captive nuts for internal mounting plates
2)    Right-hand sill section complete with captive nuts for internal mounting plates
3)    Internal mounting plates (pre-drilled), quantity 6
4)    Fastener kit including bolts and washers for internal mounting plates, quantity 24
5)    Fastener kit including screws, nuts, washers for external body fastening, quantity 22
6)    Installation guide

The CAD drawing below shows the right-hand sill assembly complete with internal mounting plates.
In addition to this, the captive nuts are shown where the mounting plates are to be fastened.
Hidden detail of both jacking points is also shown along with relevant welding details.

     sill-assy-1rh2

Below is a photograph is a custom wooden crate containing a pair of steel sills being shipped to Mark Roberts in Western Australia

     custom boxed sills2r
Pricing for the sill sections, internal mounting plates and fastener kits is $650.00 excluding GST
Pricing is correct as of 26/12/2023

Copyright © 2023 Lotus Marques

Alternative clutch fork rubber gaiter A026Q6003 to suit the Ford 2000E gearbox

Tuesday, 26 December 2023 14:01 Product News
Print
Lotus Marques offers an alternative clutch fork rubber gaiter A026Q6003 to suit the Ford 2000E gearbox as fitted to the Lotus Elan, Elan +2 and Lotus 7

clutch-lever-rubber-boot1r

This alternative gaiter may look very different but it offers generous overlapping flanges inside and outside the bell-housing.
These sturdy flanges locate the gaiter in the existing bell-housing clutch fork opening.
The multiple bellows construction offers greater flexibility and prevents the gaiter from being dislodged whilst the clutch fork is operated.

clutch-lever-rubber-gaiter2r

Installation of the new gaiter should commence by first checking the clutch fork is positively secured to the pivot pin by means of the correct spring clip.
With the clutch slave cylinder push-rod removed, the clutch fork should move freely backwards and forwards.
After removing the old rubber gaiter, the new gaiter should be slid onto the fork so the cut-out in the rubber engages with the fork channel.
Continue to apply pressure on the gaiter so the fork channel passes through the gaiter and exposes the clutch slave cylinder push-rod location hole – see above photograph

clutch-lever-rubber-gaiter3r

Once the gaiter is pressed on sufficiently to expose the push-rod location hole, it will automatically be secured to the fork in the operating position.
Next, internal flange should be carefully pushed through the opening so it spreads out on the inside of the bell-housing.
The external portion of the gaiter can then be gently manipulated to optimise the installed position within the bell-housing rectangular opening.

clutch-slave-cylinder2r

These rubber gaiters became commercially available after careful research and locating an overseas supplier who supplied quality automotive components.
In July 2007 the first rubber gaiter of this particular type was fitted to a Lotus Elan S4 owned by Geoffrey Lee.
Since then, numerous rubber gaiters have been supplied to Lotus owners in Australia and overseas.

Several clutch fork gaiters have been installed by Lotus Marques whilst Lotus vehicles have undergone various tasks in our workshop.
Some of the local Lotus owners who are recipients of this new type rubber gaiter include-
David Flynn - Elan S3 FHC
Barry Cady - Elan S3 FHC
Trevor Cannell – Elan S4 DHC
Geoffrey Lee – Elan S4 DHC
Bob Ridgewell – Elan +2

Pricing for the clutch lever rubber gaiter is $27.00 excluding GST
Pricing is correct as of 26/12/2023

This document is a part of a library of technical information to assist Lotus Marques customers in producing quality results whilst maintaining their vehicle.
Other relevant documents include-
1)    Newly designed billet clutch slave cylinder LM-X036Q6025Z
2)    Re-designed solid hydraulic pipe conversion for clutch slave cylinder LM-026J6003-MOD
3)    Remote bleed kit for clutch slave cylinder LM-ELCSCRBK
4)    Clutch release bearing carrier LM-A026Q6007

Copyright © 2023 Lotus Marques

Lotus Twin Cam race specification valve spring retainer

Tuesday, 15 February 2022 18:57 Product News
These high quality components has been carefully designed to provide additional reliability for race applications.
These valve spring retainers are CNC machined from high tensile steel alloy 4140 and are ideally suited for high lift race specification valve springs.
All the critical dimensions have been adhered to so the retainers fit a spring with an outside diameter of 1.100” (27.94mm).

valve-spring-retainer-kit---race1r-wm

The internal tapered bore has an excellent smooth surface finish to ensure the collets lock correctly on the retainer as well as the valve.
Valve spring retainer weight = 17 grams

Vehicle application details - to suit Ford Lotus twin cam 1558cc, 8 valve
Model Production dates
Ford Lotus Cortina Mk1 1963 to 1966
Ford Lotus Cortina MK2 1967 to 1970
Lotus Elan 1962 to 1974
Lotus Elan 2+2 1968 to 1974
Lotus Europa Twin Cam 1968 to 1974
Lotus and Caterham 7 1973 to 1974

Export pricing for a set of 8 valve spring retainers @ $105.00 excluding GST
Please note, parts orders for export do not attract Goods and Services Tax (GST)

Set of 8 valve spring retainers @ $115.50 including GST
Alternatively a single valve spring retainer @ $15.13 each including GST

To complement the race specification valve spring retainer, Lotus Marques can supply the following components-
Light weight steel cam followers – please enquire
Duplex valve spring kits to suit various camshaft specifications – please enquire
Bronze valve guide kit, (4 inlet, 4 exhaust) @ $99.00 including GST
Set of 8 cast iron cam follower sleeves @ $259.60 including GST
Cast iron cam follower guide 026E0324 @ $33.00 including GST

Lotus Marques supports local industry by manufacturing these valve spring retainers in Australia.
Trade inquires are also welcome - please call (03) 9761-1903 to discuss your requirements
Please note carefully, pricing above does not included postage and packing.
Pricing information is correct as of 14/1/2022 but may alter with time and currency exchange rate fluctuations.
Shippng from Australia to UK, USA, New Zealand, anywhere worldwide!
Contact Lotus Marques now for postal or courier shipping costs.

Lotus Twin Cam valve spring retainer A026E0021

Tuesday, 15 February 2022 17:50 Product News
These high quality components has been carefully designed to provide additional reliability for street and occasional club competition events.
These valve spring retainers are CNC machined from high tensile steel alloy 4140 and are ideally suited for the original valve springs.
All the critical dimensions have been adhered to so the retainers fit the standard valve spring with an outside diameter of 1.200” (30.48mm).

valve-spring-retainer-kit-a026e0021r-wm
The internal tapered bore has an excellent smooth surface finish to ensure the collets lock correctly on the retainer as well as the valve stem.
Valve spring retainer weight = 26 grams

Vehicle application details - to suit Ford Lotus twin cam 1558cc, 8 valve
Model Production dates
Ford Lotus Cortina Mk1 1963 to 1966
Ford Lotus Cortina MK2 1967 to 1970
Lotus Elan 1962 to 1974
Lotus Elan 2+2 1968 to 1974
Lotus Europa Twin Cam 1968 to 1974
Lotus and Caterham 7 1973 to 1974

Export pricing for a set of 8 valve spring retainers @ $105.00 excluding GST
Please note, parts orders for export do not attract Goods and Services Tax (GST)

A set of 8 standard valve spring retainers @ $115.50 including GST
Alternatively a single valve spring retainer may be purchased @ $15.13 each plus GST

To complement the standard valve spring retainer, Lotus Marques can supply the following components-
Light weight steel cam followers – please enquire
Competition valve spring kit, (8 dual springs B026E0022, B026E0023) @ $90.20 including GST
Bronze valve guide kit, (4 inlet, 4 exhaust) @ $99.00 including GST
Cast iron cam follower guide 026E0324 @ $33.00 each including GST
Set of 8 cast iron cam follower sleeves @ $259.60 including GST
Special valve spring retainer with 0.090” offset @ $27.50 including GST

tc-offset-valve-spring-retainer1r-wm
The photograph above shows a standard valve spring retainer and valve (located on the left-hand-side) and an offset retainer and valve (located on the right-hand-side).
Having a retainer with an offset allows a non-standard spring with a taller profile to be installed.

Lotus Marques supports local industry by manufacturing these valve spring retainers in Australia.
Trade inquires are also welcome - please call (03) 9761-1903 to discuss your requirements
Please note carefully, pricing above does not included postage and packing.
Pricing information is correct as of 14/1/2022 but may alter with time and currency exchange rate fluctuations.
Shippng from Australia to UK, USA, New Zealand, anywhere worldwide!
Contact Lotus Marques now for postal or courier shipping costs.

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