![]() ![]() Stage 3 Handling Modificationsīecause most track surfaces are quite well maintained and you need to maximize your cornering speeds you will typically drop the car more than you would for a road setup, and using firmer springs and anti roll bars will reduce body roll. Thankfully there are solutions to these problems, which are relatively easy to install. We have heard of fuel pumps failing to grab fuel on heavy cornering, or fuel flow problems due to the G forces a car experiences on a track. See the section below on the power gains available if you switch to a race fuel, but bear in mind you may have to dramatically increase your fuel delivery. Typically you need a lot more fuel if it is of race grade and then you'll need to match this with enough air. It is always recommended to over specify your injectors to ensure they can keep up even when they become worn or degrade, or you have lower quality fuel. To run race fuel you'll need a higher capacity fuel pump and better injectors. It also makes sense to specify a very high-quality synthetic oil as cheaper and low-quality oils will start to shear, and fail to protect the engine when it is working hard. This in most areas will fail a car inspection and can result in a ticket/citation or even confiscation of your vehicle in some regions hence why we've labelled it as stage 3.Ī stage 3 race modified car will also need to be regularly overhauled and serviced. Often catalysts/DPF Filters and other pollution controls are removed to aid flow, and as you tend to run rich mixtures you won't want a catalyst anyway. Straight through exhaust pipes can be used in some areas, but there are many exhaust upgrades around that will help your stage 3 tune to shine. Sound levels are often much higher, although many tracks have limits in place so you'll need to check these. ![]() The tread design is usually optimised for track cornering, and will not provide much comfort and road noise can often be a problem with some designs. Softer tire compounds give better grip but will wear very quickly so will need to be replaced regularly. You also have access to track-only components, like slick tires, to give you the maximum cornering grip. This would be a problem on a road car, but is not usually a consideration for a track car in most regions. The low RPM lag will not be an issue as the car will rarely be in this part of the rev-range, and you can make a lot more top end power.īecause you will be burning more fuel it is quite common to see raised emission levels on a stage 3 tuned car. With a road car you need the turbo to flow well at low RPM's which reduces it's top end potential, so when looking for a stage 3 setup you can go with a larger turbo. Turbo upgrades are quite popular thanks to the massive power gains on offer. This will cause lumpy tickover idling and poor running at low rpm's but if you want to raise the RPM range and get more top end power the cam profile is generally the key to unlocking this extra power. You can also fit a motorsport cam which has an aggressive cam profile. Manufacturing tolerances will also be much tighter with stage 3 parts and you'll notice this can add quite dramatically to the cost. You'll notice than many performance engines have rpm limits raised far above that for a stock engine, and this is primarily down to the quality and balance of the components used in the engine. See our guide to pistons and crankshafts for more information on this topic.Īnother bonus of having a balanced engine is that you can raise the RPM redline safely. Fitting forged pistons and crank and getting these balanced will all help improve reliability with the extra stresses a stage 3 tune puts on your engine. Taking F1 cars as an example, you'll see that engines need to be prewarmed to expand the metals and unseize the engine due to the very tight tolerances.īalancing the engine components and altering the crank, rods and pistons can help raise the RPM limits helping you to make more power at the top end.ĭepending on your strategy you may want to increase or drop the compression ratio. Stage 3 Internal Engine modsĮngines will be stripped down and rebuilt with stronger components and tolerances will be tightened up. The drop in weight is also a bonus with the car physically having to do less work to get the car moving. Tick over will generally need to be set higher to avoid stalling and keep the engine rotating smoothly at lower rpm ranges. ![]() Flywheels are usually replaced with lighter units, this means the car engine RPM's will change much more quickly, allowing rev-matching through gear changes, and better acceleration.ĭepending on the other mods you've done and your choice of engine management you can go pretty light with a motorsport flywheel, but there are some circuits and tracks with hills and long straights that will benefit from a more substantial flywheel. ![]()
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