Rennsport Factory

Rennsport Factory Bespoke motorsport and tuning components for competition and the road. Bespoke tuning and suspension components

Here are some fitment pictures of the E92 M3 Moton 2 way coilover kit recently supplied for a trackday build.
05/02/2024

Here are some fitment pictures of the E92 M3 Moton 2 way coilover kit recently supplied for a trackday build.

The W201 190e 2.3, 2.5-16 and EVO 1 and 2s came anywhere from 180-360hp in full race trim. Each extreme having wildly di...
05/02/2024

The W201 190e 2.3, 2.5-16 and EVO 1 and 2s came anywhere from 180-360hp in full race trim. Each extreme having wildly different overall specifications and in turn camshaft profiles. We’re confident we can cater for most specifications, here are a couple different options of our 190e kit with double valve springs, followers and lightweight retainers. Available for a range of Mercedes engines – M102, M103, M104, M111, M112, M113, M119, M120.

Available here:

https://rennsportfactory.co.uk/product/mercedes-w201-190e-2-3-16-2-5-16-inc-evo-1-2-fast-road-and-competition-performance-camshafts/

It is about time we started showing more of what comes and goes through our doors. The website is in the process of bein...
09/12/2023

It is about time we started showing more of what comes and goes through our doors. The website is in the process of being updated, most of the AST and Moton listings are now live. Links at the bottom.

This is a Moton 2 way adjustable coilover kit for a BMW E92 M3 track car. Built to our specifications and shipped to us from Holland within a month.

The customer is building a car with the sole goal of going round the track as fast as possible. Having been disappointed with some of the previous experiences with aftermarket suspension he understood the importance of building a kit around the car, tyre and application.

This kit offers rebound with compression independently via external reservoir. The larger range of adjustment will help get the car setup to how the customer prefers, whilst also catering for different scenarios or changes to specification.

All AST and Moton dampers are monotube in design. Oil and gas are separated which offers a larger oil capacity and main piston when compared to twin tube. This combines to improve response and thermal resistance whilst preventing cavitation (aeration of the oil). Weight of the units is reduced through having less parts and the ability to use aluminium as damper bodies. Each AST and Moton kit is specified bespoke to the car and driver, with the dampers being rebuildable for years to come this ensures long term ownership.

The Moton is an ultra low friction non inverted design but with strength via extra support of the rod throughout its travel. This offers improvements in response due to a larger piston creating the damping forces. This is combined with a reduction in friction and maintenance as the DU bushes are smaller and sealed within the damper submerged in oil.

Moton have a novel adjustment system completely different to AST and most other dampers on the market. Adjustment is done via very small precisely drilled holes which offer a large improvement in accuracy, repeatability and a larger range. The larger range ensures the vehicle specification and in turn spring rates can be changed dramatically without the dampers needing a revalve.

Almost any spring and damper length or rate can be supplied. You’re welcome to supply us the rates you require, or with a quick consultation we can specify ratings. This ensures you get exactly the kit you need for you and your application – be it a comfortable road going suspension, a full race kit or anything between.

BMW E92 M3 AST and Moton range -

https://rennsportfactory.co.uk/product/bmw-3-series-e90-e92-e93-m3-ast-5100-5200-5300-series-height-and-damping-adjustable-coilover-suspension/

Link to the shop

https://rennsportfactory.co.uk/shop/

Carbon fibre intake trumpet for the 190e 16v ITB airbox kit.
28/10/2023

Carbon fibre intake trumpet for the 190e 16v ITB airbox kit.

The new primary objective for our Rotrex Supercharger Kit was to create a modular bracket capable of accommodating the d...
05/08/2023

The new primary objective for our Rotrex Supercharger Kit was to create a modular bracket capable of accommodating the diverse range of older engines, eliminating the need for individual designs for each engine-car combination. This meticulous approach has led to the development of a single bracket that caters to an extensive array of kit variations.

Designed to fit M103, M104.980, and M104.99X engines, the kit offers six distinct belt configurations. Users have the flexibility to choose from the original 6PK belt, an 8PK upgrade for all OEM pulleys, a separate 6PK belt, a separate 8PK belt, a space-saving design for specific models like the W201 190e 2.6 featuring an additional belt driven from the front's OEM unit and an upgradable option for a complete 8PK pulley set. Progress has also been made in adapting the kit to M102 8v, M102 16v, and M111 4-cylinder engines.

With six variants available for each of the six engines and four possible charger positions, we’re confident our comprehensive kit will cater to every fitment scenario without necessitating a new design for each application.

The most demanding aspect of the development has been the rear-driven kit for the 190e. We’ve used the 2.6 M103 as a base, but all 6 cylinder engines will work. Due to the limited space in this model, the charger has been strategically positioned towards the rear of the car. The photo shows an 8PK upgraded pulley set for the crankshaft, alternator, water pump and power steering, along with a tensioner replacement idler and a heavy-duty tensioner kit replacing the old viscous fan unit. Additionally available is a 150A alternator upgrade.

The previous kit showed the dual belt system for cars with limited space like the W201 190e 2.6. This is the 8 rib belt ...
15/06/2023

The previous kit showed the dual belt system for cars with limited space like the W201 190e 2.6. This is the 8 rib belt upgrade for the M103 and M104 charger kit aimed at higher boost systems. So far test fitted in an W124 300CE-24, as mentioned in the previous post, the W201 190e 6 cylinder needed a bespoke kit designed for the limited space. Included in this kit will be an electric fan conversion, upgraded heavy duty tensioner, an idler system to replace the old tensioner, 8PK alternator, water pump and power steering pulleys with an optional 8PK clutched air conditioning pump pulley and 150A alternator upgrade.

The 6PK system is much the same, just using OEM pulleys. HD tensioner is optional, but we wouldn’t recommend using the older M103 and M104-980 style unit. You can convert to the later 990 tensioner or our heavy duty unit.

We’ve been asked a fair few times what power to expect from this kit. The engines have been proven stout with various turbo kits over the years pushing the boundaries over 1000hp. The largest charger claims “up to 965HP” What this will translate to on an M104 is hard to say but if near that level is required it can likely be achieved.

Getting there will require careful consideration to every component on the entire vehicles drivetrain. For example, when you get past 600NM, the costs of upgrading everything become high. Driveshaft splines on the older models start to fail prematurely. Finding a good manual box is tough and reduced drivability is expected when you start making big hp. A strong clutch or uprated autobox internals are required. Propshaft components will become a wear item. Brakes, suspension, wheels and tyres all need upgrading, and likely upgrading again if you want the big numbers.

This is outside of the charger kit, which will need a strong cooling solution, a fuel system upgrade, a new engine management system and likely internal engine upgrades.

The age old saying of going fast costs money, how fast do you want to go?

This is why we've design a modular kit you can upgrade throughout ownership.

Mercedes have nine chassis models that feature either an M103 or M104 as their OEM engine: The W201/W202, W124/W210, W12...
15/06/2023

Mercedes have nine chassis models that feature either an M103 or M104 as their OEM engine: The W201/W202, W124/W210, W126/W140, R107/R129, and W463. This count excludes conversions and unique cases such as the Isdera Spyder 036i, Roewe W5 (2011-2017) and R95 (2008-2009), SsangYong Chairman (1997-2017), Korando (1996-2006), Kyron (2007-2014), Musso (1993-1999), Rexton Y200 (2001-2006), Rodius (2004-2013), Heuliez Intruder (1996), and the OPAC Contender XG.

To address this challenge comprehensively, we have devised a modular kit capable of accommodating all vehicles equipped with this engine. The concept behind this design is to offer a basic kit that can be upgraded to any specification, or even facilitate a vehicle or engine change in the future with minimal part replacements.

In our latest iteration, the bracket has been split into two pieces, with the charger outlet now positioned upward. Additionally, it has been repositioned farther away from the exhaust manifolds, creating the potential for fitting tubular manifolds. This adjustment was imperative since devising a belt system compatible with all models posed significant challenges within the space available. Nonetheless, we are confident that we have now developed a solution that caters to every vehicle in question.

Initially, we will offer an entry level system tailored for lower boost setups, this will run on the original 6PK belt. We have optimized belt wrap to minimise the likelihood of slippage. Countless hours have been dedicated to scouring catalogues in search of OEM components that can be utilized and the tensioner is no exception. Our newly designed tensioner replaces the original fan and pulley with an electric fan conversion and a modern heavy duty tensioner which is nice and easy to use. We are confident that this system can even be retrofitted to non-supercharged engines, offering an upgrade to the problematic OEM tensioner system found in the M103 and M104-980.

While this solution will likely cater to the majority of requirements, our two-piece bracket design allows for various configurations. The double belt system presented earlier remains an option, but looks to be a tight fit due to headlight clearance with the new charger position. For higher boost systems with limited space, we are currently developing an upgrade to the OEM belt system, utilizing an 8PK belt. This upgrade package will encompass a new crankshaft pulley with an improved harmonic balancer, as well as upgraded tensioner, water pump, alternator, power steering, and air conditioning pump pulleys.

In addition to the three belt options, we have also crafted a specific design for the 190e and any others that may lack the space required to extend the original belt towards that side. Shown in the picture is our solution to this issue. The charger has been moved to the rear and another 8PK belt mounted behind the bracket driven from the front belt. This can be used in conjunction with our 8PK main pulley upgrade for a higher HP system.

Cooling solutions next.

We’ve found some improvements on our W201/W124/R129 top mounts. Castor adjustment has been added, we prefer this method ...
29/05/2023

We’ve found some improvements on our W201/W124/R129 top mounts. Castor adjustment has been added, we prefer this method as each camber and castor adjustment is independent of each other and can only move along the axis they adjust. The top mount housing is clamped to a plate that sits underneath the turret to add strength and we’re confident our securing solution isn’t going to move or come loose over time like many others. As far as we can see the only downside is a slight loss of camber adjustment at the far ends.

They’re machined from billet in low volumes so won’t be cheap, but as you can see - they are a properly engineered set of top mounts designed to be the best on the market. We’ve got a few ideas to make them more road friendly. Will need some testing.

Here is our new heavy duty W201/W124/R129 camber adjustable spherical bearing top mount. We'll be looking at making thes...
25/05/2023

Here is our new heavy duty W201/W124/R129 camber adjustable spherical bearing top mount. We'll be looking at making these for other platforms soon.

On a race car, parts need to be as light as possible without sacrificing strength. In the case of a spherical bearing top mount, the wheel will likely see limited travel and articulation and most opt for a smaller bearing to save weight and costs. The problem comes when this is fitted to an old Mercedes without the limited wheel travel - the bearing will quickly ram the casing wall and rattle whilst it fails prematurely.

If you’re running top mounts like these and are generally fed up of constantly replacing bearings, these are for you.

Did you know where the spherical bearing came from?

“The spherical rod end bearing was developed by N**i Germany during World War II. When one of the first German planes to be shot down by the British in early 1940 was examined, they found this joint in use in the aircraft's control systems. Following this discovery, the Allied governments gave the H.G. Heim Company an exclusive patent to manufacture these joints in North America, while in the UK the patent passed to Rose Bearings Ltd. The ubiquity of these manufacturers in their respective markets led to the terms heim joint and rose joint becoming synonymous with their product.”

M103/M104 Rotrex Supercharger mounting bracket nearing completion. Little bit lighter, little bit stronger. 3 tensioner ...
19/05/2023

M103/M104 Rotrex Supercharger mounting bracket nearing completion. Little bit lighter, little bit stronger. 3 tensioner positions to cater for various pulley sizes. 7 mounting points, so far.

We’re big fans of converting any Mercedes to manual. The M112 V6 6 speed manual has proven to be a fairly strong box ove...
16/05/2023

We’re big fans of converting any Mercedes to manual. The M112 V6 6 speed manual has proven to be a fairly strong box over time, with the right flywheel and clutch setup it will take M113 5.5 AMG torque without issue and excellent longevity.

The W204 C300 and C350 V6 petrol 6 speed manual box is a version from a later generation and again looks to be a very strong box. We have developed a range of lightweight billet flywheel and clutch systems to cater for almost every conversion with this box, this includes the M156, M272, M273, M137, M275 and M285. Each kit is designed to work with the OEM ECU timing markers, starter motor and clutch release bearing.

This particular kit has been specified to work with an M275 V12 twin turbo seeing light track work. The clutch choice is a billet aluminium cover and twin 228mm discs carrying a torque capacity of 1250NM with metallic linings and billet machined flywheel. Be interested to hear how long this lasts behind the V12 TT.

Since they are from the same chassis a W204 C63 AMG 6 speed manual conversion should be a nice and easy job with the W204 C300/C350 components and our new clutch and flywheel setup. We can offer this setup with organic linings for daily drivers and the best part is so far, most of the OEM ECUs have the option to convert the ECUs in the car to manual with a star system, let us know if you need help with this.

If you’re racing, there are some other options for smaller diameter units we can offer with minor changes to our drawings. We can make these for any application.

Address

Launceston

Opening Hours

Monday 9am - 6pm
Tuesday 9am - 6pm
Wednesday 9am - 6pm
Thursday 9am - 6pm
Friday 9am - 6pm
Saturday 9am - 6pm

Website

Alerts

Be the first to know and let us send you an email when Rennsport Factory posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The Business

Send a message to Rennsport Factory:

Shortcuts

Share