FAQ

TUNING

1) What are the stages of tuning?
Stage 1 is a "generic" tune developed by MRC Tuning for a standard car with no modifications.
Stage 2 is a "custom" tune for modified cars and is a tune developed for this specification of modifications. The car is checked and will be adjusted or changed so the car runs safe. This is for cars with intake, exhaust modifications on standard injectors and standard turbos. On more common modified cars with injectors and turbos we do have a stage 2 available. This is required for cars with precats removed, secondary air disabled etc.
Stage 3 is a "realtime custom" so will involve multiple flashes or emulator tuning for highly modified spec of car. This is the best you will get.
Stage 3 can be used on a standard car. This is required for any cars with non standard mafs, injector, turbo combinations.
Stage 2 and Stage 3 tunes should be driven by the customer, so we can get as much feedback on how you want the car to feel so we can adjust the tuning to suit you.
2) What is a "map tweak" and "map upgrade"?
A map tweak is where something has changed on the car and the tune has to be checked. You keep your original tune and timing and boost can be tweaked or functions disabled (secondary air injection removal, rear lambda, flap control, throttle sensitivity, etc).
A map upgrade is when you modify a car and you require another remap that falls into a different stage, usually going from stage 1 or stage 2 tune up to stage 3. This will always give you the best tune on your car.
3) How much is a "map tweak" and a "map upgrade"
A map tweak is usually £180 inc vat.
A map upgrade to stage 3 is the stage 3 cost with 30% discount and this includes dyno time. Please contact us for exact costings.
4) Is the car checked prior to tuning?
Prior to any software changes, we do one of our Engine Health Checks. All cars are thoroughly inspected for any fault codes, and are run through a series of comprehensive diagnostics tests in order to ensure it performs as it should in stock form.
If it doesn't, we point out what issues have to be addressed before we can go any further. We will never tune an engine with defective sensors or poor performance due to poor servicing/maintenance.
To save you time and cost, we ask that your car is maintained to a high standard, Please use the following as a check list:
Regular Health checks.
No boost leaks/vacuum leaks, fluid leaks.
No fault codes
Correct/new spark plugs
Lambda sensors replaced at 60k intervals
One way valves replaced (these can be intermittently failing and not always testable)
Air filter is new and appropriate for the level of tune
Proper heatshielding to airbox is all in place - any aftermarket intake kits should have proper shielding so no air from engine bay is consumed
MAF is reading correctly. Any non standard MAFs or mafs in custom housings will require stage 3 tuning.
N75 valve is operating correctly, preferably new
Cars should have at least 150mm clearance under the car to clear the Rolling Road. Any adjustment or removal of parts will be charged at £88+vat/hour
Genuine OE Diverter is fitted
Fuel filter is replaced every 20k/2 years or 10k/yearly on FSI.
Tyres should be road legal and aligned correctly. No track tyres or winter tyres should be used on the dyno.
5) What am I paying for in a Remap?
You are paying for the tuning of your, through time, development and expertise of MRC Tuning to get your car to a safe and optimum state of tune. The File or Edits in your ecu remain the property of MRC Tuning and should not be distributed, copied, edited or published. The file will be based on a standard OE file with only changes made by MRC Tuning.
6) Does tuning affect my warranty/ Is it visible by the dealer?
No Matter what anyone says a tuned car can be detected if looked for hard enough, either by test drive and logging, or inspection of ECU contents. You should consult you warranty company on tuning.
7) What if the dealer updates my ECU software
We can reflash your tune if this happens. This is charged at our hourly rate.
8) Is Water Injection Safe?
Water Injection can give gains if setup correctly especially on cars with inadequte intercoolers. MRC Tuning will fit and setup water injection on request by the customer, but we cannot guarantee any parts damaged due to water injection. Setup costs are charged at dyno labour rate per hour, then in addition the time and map price. If using Methanol all aluminium parts will corrode when in contact with methanol, including turbos, heads, blocks, pipes. Pumps and wiring should have regular checks and you should use a kit that has a flow meter as an extra safety mechanism to prevent hydro lock or failure. WI kits should have a flow meter to protect engine and be proportional to airflow or injector duty cycle. Methanol is flammable and will burn clear so it is recommended for saftey that it is mixed 50/50 by weight (not volume) so it is not flammable.
9) Do you still remap S2, urS4, urS6 or RS2?
We do still remap these cars but due to the age we have to insist on the car having new and genuine MAF, N75, ISV, throttle position sensor, diverter, lambda, coilpacks and boots, new uprated fuel pump with relayed power. The ECU has to be accessible for the emulator without damage to the emulator. We only do stage 3 remaps. We do not sell generic maps or chips for these cars. We will require the car to be left for 2 or more days and if any mechanical work is required this will be charged by the dyno hourly rate of £88+vat. The stage 3 price includes dyno time for 4 hours.
10) Do you do remote tuning?
We do not do remote tuning. You will always get better results to bring the car to us. We can give advice on remote tuning but remotely fault finding and diagnosing is too time consuming for us to make this an option we offer.

11) Tuning Upgrade Paths
Before modifying your car you should consult with MRC Tuning that the spec is appropriate and you are using the correct parts. If the correct make and quality of parts are used we should be able to give you an estimate on what is achievable. There are some parts that manufacturers quote gains and we would not recommend to fit so please consult before you modify the car. If you have modified your car yourself you should bring the car for an inspection before the car is tuned to see if it is a spec adequate for your requirements on your Tuning Form.

12) Remap Refunds
If you are not happy in any way, and we do not meet your requirements on the Tuning Form filled out before the remap, we will refund the cost of remap minus the health check cost and any additional labour costs we have incurred fixing the car. You have 14 days from remap and you will need to bring the car back to put stock file back on. Tuning is at your own risk and cost. If you have any issues the customer should demonstrate this to MRC tuning to show under what conditions whatever is not correct.
13) Fuel for Tuning
We will not map a petrol car that is ran on 95ron fuel. You have to use Tesco Momentum or Shell Vpower, or higher RON rated fuel to be tuned. There is a Tesco garage in Banbury. Do not under any cirumstances use Esso 97 ,that is on the way to MRC, as it is particulary bad on tuned cars.

DYNO

1) What are the terms of using the dyno?
Dyno power run (upto 3 runs) is charged at £68+vat
All dyno time is chargeable at £88+vat/hour
To reduce time on dyno please make sure of the following:
The car is in good health ready to be tuned/tested.
All Fluid levels are checked. Any coolant/oil/fluid spillage into the dyno will have a 2 hour labour charge added in order for us to dismantle and clean the dyno. Additionally you will be charge for extra time spent on the car to remove fix, and start mapping again.
Any damage caused to the dyno by tire failures or fluid leaks will be chargable
No Tyres are to have puncture repairs
Tyres are at usual operating pressures
No winter tyres fitted to the car (these get hot and melt)
No treaded track tyres (these get hot and melt, and exceed noise limits)
The car has to be aligned correctly with no extreme camber. A misaligned car can give erroneous results
Any work carried out while on the dyno will be charged at £88+vat/hour
No exhaust leaks as these will affect mixture readings from the exhaust
You should advise the operator of the rev limiter/and if one is on the car
Cars should have at least 150mm clearance under the car to clear the Rolling Road. Any adjustment or removal of parts will be charged at £88+vat/hour
Although we take as many precauions and check as much as we can, all dyno runs/usage are at the customers own risk.
2) Can I watch the dyno?
Due to Health and Safety you should not be in the workshop. Ear defenders are available if noise is unacceptable.
A Camera linked to the TV in the waiting room will be available.
3) I have been tuned by another company, can you do a power run.
Yes we can. We would advise that a Health check is performed and diagnostics are connected when we do this so we can make sure everything is safe.
4) What does the dyno measure?
It measures the torque applied ot the wheels on a wide open throttle run. From this, power is calculated to give you a power and torque curve. This can be shown at the wheels or the calculated at the flywheel numbers. The Cartec dyno measures the rundown losses and adds this measurement to the measured power at the wheels.

MRC Tuning "RESPONSIBLE TUNING POLICY"

Please fill out our "Tuning Form" before any tuning or modification work is carried out. The forms are available in the reception.
All cars that are remapped/tuned modified should be declared in full to your insurance company.
If any of your prerequisites that you make on the tuning form tuning cannot be fulfilled we will refuse to work on your car.
We do not map cars to give you a set power, the car will be tuned to what is safe for the car
Any non-advertised modification to cars will not be given a completion date or defined by a leadtime.
For reliability regular Health Checks performed by MRC Tuning should be taken out.
Even though we check every car getting more power will reduce the life of wear and tear components.
The most relaible modifications to a turbo car will be to ge the best exhaust and intake on the car to reduce stresses, with the remap.
Modifying cars in the UK generally do not add value to your car and you should be aware that in most cases will devalue the resale value of your car.
When you go to extreme modifications > 50% gains, you will have to be prepared for parts to break and severely shorten the life of engine and drivetrain components. While we tune the cars to be safe, lifetime of parts will be shortened.
Any modification that is not "off the shelf" or a common upgrade will encounter more risk of failure.
Any lowering of compression, will mean less mpg and less driveability off boost. It can also cause the idle to be uneven.
Any non OE camshafts can cause a rough idle.
Modifying a normally aspirated car to be charged is not going to keep OE safety protocols in the ECU for boost levels.
Any car that does not have egt and wideband measurements in the ECU should have external gauges fitted to check the car is safe at all times.

TERMS AND CONDITIONS
MRC Tuning Ltd is a remapping/tuning company:
We tune all post 1998, drive by wire, VAG/Porsche and a select few other brands with Bosch/Siemens ECUs.
Please read and understand our "responsible tuning policy" before undertaking any tuning work

We cannot warranty any engine. We can guarantee our remaps will be safe at the time the car is mapped.

If you are not happy in any way with the remap we will refund the remap cost within 14 days of the remap.

We cannot quote any leadtimes for non OE work or modifications to cars. All project or custom work will not have any defined leadtimes or completion dates. We will only give expected time for the labour of work.
Running a car on the dyno is at the customers own risk.

Any test drives by MRC Tuning Staff are at the customer's risk. Our staff are insured to drive customer cars.

We charge £22+vat per day for storage of cars, which will take effect after 2 weeks of the booking in date, or after 1 week of completion of work.

All cars must be taxed, have the tax disc on display, insured and have a valid MOT at all times when on MRC Tuning property. We will not drive any cars unless they are known to be 100% legal for use on the road.
Cars will only be insured by MRC Tuning while work is being carried out inside the workshop.

There are no warranties on any modified cars.

Servicing/Mechanical Work/Diagnostics:
In addition to remapping we can service/maintain/diagnose/modify/upgrade all post 1998 drive-by-wire VAG/Porsche cars at the owners request to their specifications. There are no warranties on any modified car parts fitted to a customers car.

We use VCDS, Durametric and VAG factory software for diagnostics.

All cars for diagnostics/remedial work should fill in a "diagnostic problem form" available in reception to help us identify the problem, when and how it occurs. The problem should be demonstrated to a member of staff. The form must be filled in to correctly identify and fix any issues.

Service schedules for modified (greater than 30% gain from stock) must be shortened accordingly. All engine oils and filters should be replaced on a 5k miles basis. Gearbox, diff oils and spark plugs should be replaced every 10k miles. Cambelt service should be carried out every 20k miles or less.
Cars with more than 50% incresase in power should have Health Checks every 4k. Oil and filters in gearbox and engine, spark plugs should be changed every 4k or after any track day.
All OE standard parts fitted to a modified car will not carry any manufacturer's warranty or guarantee.

All modifications that differ from OE specifications, carried out by MRC Tuning are modified at the owners' risk.

An Engine Health Check should be carried out every 6 months.

All cars should be test driven on the day of pickup to make sure any issues or problems have been resolved on the day of pick up.

MRC Tuning cannot test drive cars for prolonged periods of time. If the car has an intermittent issue the customer has to drive the car until the issue is testable by MRC Tuning.

We only use genuine parts for servicing and repairs unless otherwise stated or requested by the customer.

We request that all MAFs on cars are genuine VAG parts, due to aftermarket MAFs causing intermittent or regular failures. There is no warranty if the MAFs have been damaged by contaminates sprayed on them.

We use a service checklist for all service inspections. These are available for your car on request at time of picking up.

All cars booked in for service or diagnostics should be picked up within 1 week of the booking in date, or storage charges will be incurred.

MRC Tuning does not carry out any accident damage repair or bodywork.

We do have a courtesy car available on request. If you have requested a courtesy car please check it is available the day before you are due to drop off your car, as the cars can be returned late from previous bookings. You have to have full insurance cover for the use of a loan car from MRC Tuning.

By leaving your car at MRC Tuning, or having work undertaken by MRC Tuning, you agree to all the above terms and conditions.

Q?

Fuel For Tuning

A.

We will not map a petrol car that is ran on 95ron fuel. You have to use Tesco Momentum or Shell Vpower, or higher RON rated fuel to be tuned. There is a Tesco garage in Banbury. Do not under any circumstances use Esso97 that is on the way to MRC, as it is particularly bad on tuned cars.

Q?

What are the stages of tuning?

A.

Stage 1 is a "generic" tune developed by MRC Tuning for a standard car with no modifications.

Stage 2 is a "custom" tune for modified cars and is a tune developed for this specification of modifications. The car is checked and will be adjusted or chnaged so the car runs safe. This is for cars with intake, exhaust modifications on standard injectors and standard turbos. On more common modified cars with injectors and turbos we do have a stage 2 available. This is required for cars with precats removed, secondary air disbaled etc.

Stage 3 is a "realtime custom" so will involve multiple flashes or emulator tuning for highly modified spec of car. This is the best you will get.

Stage 3 can be used on a standard car.This is required for any cars with non standard mafs, injector, turbo combinations.

Stage 2 and Stage 3 tunes should be driven by the customer, so we can get as much feedback on how you want the car to feel so we can adjust the tuning to suit you.

Q?

What is a “map tweak” and “map upgrade”?

A.

A map tweak is where something has changed on the car and the tune has to be checked. You keep your oringal tune and timing and boost can be tweaked or functions disabled (secondary air injection removal, rear lambda, flap control, thorttle sensitivity, etc).

A map upgrade is when you modify a car and you require another remap that falls into a different stage, usually going from stage 1 or stage 2 tune upto stage 3. This will always give you the best tune on your car.

Q?

How much is a “map tweak” and a “map upgrade”

A.

A map tweak is usually £180 inc vat.

A map upgrade to stage 3 is the stage 3 cost with 30% discount and this includes dyno time. Please contact us for exact costings.

Q?

Is the car checked prior to tuning?

A.

Prior to any software changes, we do one of our Engine Health Checks. All cars are thoroughly inspected for any fault codes, and are run through a series of comprehensive diagonstics tests in order to ensure it performs as it should in stock form.
If it doesn't, we point out what issues have to be addressed before we can go any further. We will never tune an engine with defective sensors or poor performance due to poor servicing/maintenance.
To save you time and cost, we ask that your car is maintained to a high standard, Please use the following as a check list:

  • Regular Health checks.
  • No boost leaks/vacuum leaks, fluid leaks.
  • No fault codes
  • Correct/new spark plugs
  • Lambda sensors replaced at 60k intervals
  • One way valves replaced (these can be intermittanly failing and not always testable)
  • Air filter is new and appropriate for the level of tune
  • Proper heatcshielding to airbox is all in place - any aftermarket intake kits should have proper shielding so no air from engine bay is consumed
  • MAF is reading correctly. Any non standard MAFs or mafs in custom housings will require stage 3 tuning.
  • N75 valve is operating correctly, preferably new
  • Cars should have at least 150mm clearnance under the car to clear the Rolling Road. Any adjustment or removal of parts will be charged at £88+vat/hour
  • Genuine OE Diverter is fitted
  • Fuel filter is replaced every 20k/2 years or 10k/yearly on FSI.
  • Tyres should be road legal and aligned correctly. No track tyres or winter tyres should be used on the dyno.

Q?

What am i paying for in a Remap?

A.

You are paying for the tuning of your, through time, development and expertise of MRC Tuning to get your car to a safe and optimum state of tune. The File or Edits in your ecu remain the property of MRC Tuning and should not be distributed, copied, edited or published. The file will be based on a standard OE file with only changes made by MRC Tuning.

Q?

Do you still remap S2, urS4, urS6 or RS2?

A.

We do still remap these cars but due to the age we have to insist on the car having new and genuine MAF, N75, ISV, throttle position sensor, diverter, lambda, coilpacks and boots, new uprated fuel pump with relayed power. The ECU has to be accessable for the emulator without damage to the emulator. We only do stage 3 remaps. We do not sell generic maps or chips for these cars. We will require the car to be left for 2 or more days and if any mechanical work is required this will be charged by the dyno hourly rate of £88+vat. The stage 3 price includes dyno time for 4 hours.

Q?

Is Water Injection Safe?

A.

Water Injection can give gains if setup correctly especially on cars with inadequate intercoolers. MRC Tuning will fit and setup water injection on request by the customer, but we cannot guarantee any parts damaged due to water injection. Setup costs are charged at dyno labour rate per hour, then in addition the time and map price. If using Methanol all aluminium parts will corrode when in contact with methanol, including turbos, heads, blocks, pipes. Pumps and wiring should have regular checks and you should use a kit that has a flow meter as an extra safety mechanism to prevent hydro lock or failure. WI kits should have a flow meter to protect engine and be proportional to airflow or injector duty cycle. Methanol is flammable and will burn clear so it is recommended for safety that it is mixed 50/50 by weigh t(not volume) so it is not flammable.

Q?

What if the dealer updates my ECU software

A.

We can reflash your tune if this happens. This is charged at our hourly rate.

Q?

Does tuning affect my warranty/ Is it visible by the dealer?

A.

No Matter what anyone says a tuned car can be dected if looked for hard enough, either by test drive and logging, or inspection of ecu contents. You should consult your warranty company on tuning.

Q?

Do you do remote tuning?

A.

We do not do remote tuning. You will always get better results to bring the car to us. We can give advice on remote tuning but remotely fault finding and diagnosing is too time consuming for us to make this an option we offer.

Q?

Tuning Upgrade Paths

A.

Before modifying your car you should consult with MRC Tuning that the spec is appropriate and you are using the correct parts. If the correct make and quality of parts are used we should be able to give you an estimate on what is achievable. There are some parts that manufacturers quote gains and we would not recommend to fit so please consult before you modify the car. If you have modified your car yourself you should bring the car for an inspection before the car is tuned to see if it is a spec adequate for your requirements on your Tuning Form.

Q?

Remap refunds

A.

If you are not happy in any way, and we do not meet your requirements on the Tuning Form filled out before the remap, we will refund the cost of remap minus the health check cost and any additional labour costs we have incurred fixing the car. You have 14 days from remap and you will need to bring the car back to put stock file back on. Tuning is at your own risk and cost. If you have any issues the customer should demonstrate this to MRC tuning to show under what conditions whatever is not correct.