IMPORTANT PLEASE READ ROLLING ROAD CUSTOMER PREPERATION GUIDE
It's increasingly important to manage our rolling road time effectively and to provide the best value we can for our customers. The following checklist is offered to help customers with their vehicle preparation before a rolling road session. Please call to discuss your particular needs. We'll be happy to answer your questions so that you arrive with a vehicle that can be tested or else that we've identified the need for some workshop time to get to a vehicle that can be tested. Oxygen sensor: (Injection only)
Is there a Lambda (Oxygen) sensor boss in the exhaust? The thread is M18x 1.5mm, with space around the location to fit a sensor. A sensor is typically 100mm long with a cable that doesn't bend tightly to avoid obstructions - like chassis rails or inner wings. Ideally , the sensor should be fitted after the last manifold Y piece before the first exhaust joint. Exhaust joints can leak air in as well as letting exhaust out. This can give inaccurate results which lead to an inaccurate fuel map. It is possible to sample the exhaust at the tailpipe but results at idle and light load may be inaccurate, leading to an inaccurate fuel map in those areas. Throttle linkage. The throttle linkage should operate smoothly from closed to full throttle. The return to idle needs to be consistent so that the fuel and ignition maps around idle work properly. Dealing with heat
Rolling road running provides a serious test so the engine and driveline will get hot. Airflow over the car is not the same as on the road. Its no good fitting fuel pumps directly over or near a heat source . With that in mind, for obvious reasons:
No fuel leaks. Fuel pressure regulator fitted under bonnet for carburettor engines , not in the boot. No coolant leaks - so that the cooling system works as well as it can. No oil leaks - though minor oil leaks may be manageable depending on location. Exhaust routing - think about proximity to HT leads, wiring harness, fuel, coolant and brake pipes and hoses. 2 or 3 inches of clearance is not enough if the parts are not shielded
Dyno tyres: Driving axle tyres need to be in a good road worthy condition with correct pressure. General
An understanding of what state the car is at will help. eg is it a new engine that's never run or a quick power check of a new manifold because the car was run two weeks ago.... etc
Front wheel drive cars need to have correct tracking/geometry of the steering and suspension. All fluid levels correct
