All GTT pully conversions include a high quality replacement drive belt, its construction is more supple than the original, important due to the tight radius loops encountered. As a bonus we find this belt is less prone to belt squeak or ticking.
This belt is also shorter in length, ensuring that the tensioner remains at an optimum 'midway' position without risk of running out of adjustment (i.e. reaching the end stop) as the belt stretches. Although some companies don't bother changing the belt with their pulley changes, we feel this is not only bad practice but the further extended tensioner wheel results in excessive 'doubling back' of the belt potentially shorting belt life and risk of premature failure.
Remember that a shredded belt will leave you stranded so it is wise to take all possible precautions! Incidentally we would recommend a drive belt change once a year or every 12k miles (whichever the sooner). For GTT customers with our pulley/belt conversions this is available at a special 'customer friendly' price!
From £19+vat (part only)
GTT 'COLD RAM' INDUCTION KIT
This product is included in GTT 220 conversions and above.
* True 360 degree rolled edge (CNC turned from solid) Ram-Pipe.
This is expensive to produce and quite unique as other companies (if they even use a Ram Pipe at all!) use a 'spun alloy' ram-pipe that will always have an 'undercut' lip which cannot allow air to be drawn in from behind the pipe. This is as a poor substitute for a true machined fully round section lip. Our Ram-Pipe will pull air from all directions including behind the pipe, avoiding undesirable air currents at the trumpet entrance. Notice also the Ram Pipe entrance is positioned well out into the airbox, if it were flat against the airbox face it could never draw in air from the rear! By comparison a round hole at one end of the airbox is about as bad as it gets, we know as we've tested them on a flowbench!
* True cold feed using a larger (note the angled side) 'twin skin' upper airbox to shield away the heat from the adjacent hot exhaust manifold This increases airbox volume by around 25% over all other designs that seal against the bonnet underside. The 5mm air gap between the skins gives a superb thermal barrier. After a hard run the Ram Pipe remains ice cold to the touch. The upper airbox/heatshield is anodised in an attractive blue finish for good appearance and longevity.
* Optimum filtration, with negligible pressure loss is achieved using a large corrugated cotton gauze cylindrical filter of over 5" dia (others use 4" max) enclosing the Ram-Pipe. This is effectively(almost) invisible to the incoming air, which is also drawn in through the end of the cylinder through a 'twin layer gauze filtering screen' .This again is much preferable to a capped end. This is all held and supported to the airbox with 4 stainless steel springs, allowing simple dismantling to clean. The air feed is supplied to the filter from the original front intake plus a second and more significant feed from the scuttle area at the base of the windscreen. This is a natural high pressure zone giving the GTT airbox a relatively undisturbed high pressure zone to 'draw' from. For maximum performance potential a neat and tidy 2 inch diameter hole should be made in the 'plastic divider' between the scuttle area and engine bay (or the panel removed). Incidently a small funnel shoved into the outside airstream will not achieve good flow. Our system can be removed or re-fitted in 5mins for dealer servicing if required!
Airbox should be as large as possible (with our system the scuttle area effectively becomes part of the airbox volume too) with high pressure cold air feeds. A true rolled edge Ram-Pipe should be positioned with its entrance typically extending half way out into this airbox. GTT design fulfills all these fundamental design criteria and more!
The best induction kit for the MCS by far.......... GTT 'COLD RAM' INDUCTION SYSTEM!
£169+vat (available in blue or black, special colours £10+vat extra)
GTT 16 TUBE LARGE TOP MOUNT INTERCOOLER
As with all the GTT product line up we've really gone to town creating numerous improvements throughout.
CORE SIZE This is the largest Cooper S top mount intercooler yet; 16 tubes for the air to flow through ( OE has 11 ). These are also 20mm longer than OE giving an effective internal core capacity increase of 55%.To get 16 tubes in we have not sacrificed tube width either. GTT tubes are almost 8mm wide (virtually the same as stock). The finned sections are also 8mm wide. This combined with a special low lose tube design results in virtually no pressure drop across the intercooler, with unsurpassed reduction in charge air temperature.
END TANKS The GTT end tanks are just that! Tanks that allow the air to enter and exit all the tubes in as equal proportions as possible. We have not used a 'funnel principle' as the very short distance between the intercooler 'bullhorns' would not allow this to be achieved effectively without reducing the core length. A funnel would restrict much air flow from entering and exiting the rear most tubes of the intercooler, negating the benefits of having the larger core in the first place. If the space allowed us another six inches or so we would funnel. It doesn't! We have however incorporated a corner radius in the tank corners to ensure good flow around these areas.
OVAL CONNECTOR TUBES There are a nightmare for any manufacturer. The accuracy needed in reproducing the shape and size is absolutely essential if you are to achieve an intercooler that doesn't leak at the rubber bellow connectors. Any mismatch in profile to the clamps and it will leak! Probably not a lot, but to make matters worse you may not hear or notice anything, other than the car isn't very quick! GTT have invested thousands in the design and manufacturing of our oval inlet/outlet spouts which are CNC milled from solid billet. This is far more accurate than forming or unmachined sand castings. For those not familiar, we start with a complex computer programme generated from measuring the inside and outside profiles on the end of the 'bullhorns', effectively machining the entire alloy away until we are just left with an oval ring. That's the bit we weld to the endtanks. We do all this twice for every intercooler we make! Another advantage of this method of manufacture, is the immense rigidity it achieves, far greater than possible with any type of forming. This ensures it cannot deform when fully clamped together, causing air leakage.
CORE POSITION IN SCOOP Look through the scoop and you will see that the top face of the GTT intercooler sits flush with the lower edge of the scoop. Any higher and the air flow will be seriously reduced. Again we have not sacrificed core height to achieve this .The tubes are still 50mm high! You will NOT need to cut the threaded OE intercooler mounting posts off either.
FINISH Finally the GTT intercoolers are pressure leak tested and hand mirror polished/satinised.
GTT DIFFUSER (Included FREE with our 16 tube intercooler)
The diffuser features a 3 section bolted GTT anodised alloy 'air dam' around the intercooler perimeter. This utilizes the full scoop width, channeling exactly to the GTT core width. Each section of the dam is contoured exactly to the curves of the bonnet underside, it is not flat! A nitrile rubber trim then seals between the two. In essence the only way out for the incoming air is through the intercooler core. For neat appearance our design allows the original black scoop deflector/liner on the bonnet underside to be retained.
£399+vat (intercooler & diffuser)
GTT OIL CATCH CAN
The all new GTT product is purpose designed from scratch for the MCS. Its purpose is to effectively catch and store oil present in the breather system to prevent it entering and contaminating the intercooler core, which dramatically reduces its cooling efficientcy.(ie reducing power).
Also by trapping the oil we are stopping it from entering the combustion chambers, where the effect would be to reduce the octane of the fuel as it mixes with it . Lowering the octane results in earlier onset of pinking; this to reduces power combined with much greater risk of engine damage!
Features;
Highly attractive all aluminium hand mirror polished construction. No silicone tube body means no collapsing in use!
Proper internal drilled baffle plate with adjustable height. We do not rely solely on a ball of gauze to trap the oil!
Neat screw in dipstick to check oil level. Plastic sight glasses discolour & can collapse during use.
Drain plug for fast emptying of can without requiring dismantling or removal.
Comes complete with mounting strap and correct length hoses. Mounts to chassis using single existing fixing bolt.
All GTT pully conversions include a high quality replacement drive belt, its construction is more supple than the original, important due to the tight radius loops encountered. As a bonus we find this belt is less prone to belt squeak or ticking.
This product is included in GTT 220 conversions and above.
* True 360 degree rolled edge (CNC turned from solid) Ram-Pipe.
This is expensive to produce and quite unique as other companies (if they even use a Ram Pipe at all!) use a 'spun alloy' ram-pipe that will always have an 'undercut' lip which cannot allow air to be drawn in from behind the pipe. This is as a poor substitute for a true machined fully round section lip. Our Ram-Pipe will pull air from all directions including behind the pipe, avoiding undesirable air currents at the trumpet entrance. Notice also the Ram Pipe entrance is positioned well out into the airbox, if it were flat against the airbox face it could never draw in air from the rear! By comparison a round hole at one end of the airbox is about as bad as it gets, we know as we've tested them on a flowbench!
* Optimum filtration, with negligible pressure loss is achieved using a large corrugated cotton gauze cylindrical filter of over 5" dia (others use 4" max) enclosing the Ram-Pipe. This is effectively(almost) invisible to the incoming air, which is also drawn in through the end of the cylinder through a 'twin layer gauze filtering screen' .This again is much preferable to a capped end. This is all held and supported to the airbox with 4 stainless steel springs, allowing simple dismantling to clean. The air feed is supplied to the filter from the original front intake plus a second and more significant feed from the scuttle area at the base of the windscreen. This is a natural high pressure zone giving the GTT airbox a relatively undisturbed high pressure zone to 'draw' from. For maximum performance potential a neat and tidy 2 inch diameter hole should be made in the 'plastic divider' between the scuttle area and engine bay (or the panel removed). Incidently a small funnel shoved into the outside airstream will not achieve good flow. Our system can be removed or re-fitted in 5mins for dealer servicing if required!
As with all the GTT product line up we've really gone to town creating numerous improvements throughout.
The all new GTT product is purpose designed from scratch for the MCS. Its purpose is to effectively catch and store oil present in the breather system to prevent it entering and contaminating the intercooler core, which dramatically reduces its cooling efficientcy.(ie reducing power).
