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241 Castleberry Industrial Drive
Cumming, GA 30040
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(678) 513-7105
MODIFICATIONS 101

Not everyone has complete knowledge of what makes fast cars faster and we don't expect you to... That's our job!

This page contains an overview of the components often installed at Vengeance Racing. Give us a call to discuss your vehicle and what setup is best for your horsepower expectations and racing needs.

 

Turbocharger

Turbochargers were originally known as turbosuperchargers when all forced induction devices were classified as superchargers. Nowadays the term "supercharger" is usually applied only to mechanically driven forced induction devices. The key difference between a turbocharger and a conventional supercharger is that a supercharger is mechanically driven by the engine, often through a belt connected to the crankshaft, whereas a turbocharger is powered by a turbine driven by the engine's exhaust gas. Compared to a mechanically driven supercharger, turbochargers tend to be more efficient, but less responsive. Turbos employ a device called a "wastegate," which bypasses exhaust gas past the turbo when a certain boost limit is reached.

Centrifugal Supercharger

The centrifugal supercharger is very similar to a turbocharger, except the centrifugal supercharger is driven by a belt off the engine, while the turbocharger is driven by the force of the exhaust gases. These type of superchargers (or turbos) run at extremely high speeds. To achieve these high speeds in the centrifugal supercharger, there is an additional internal step-up drive inside the blower. Due to the design of these units, the faster the impeller spins the more boost the blower makes. As a result, these units typically do not produce much power at low engine speeds because the impeller is not spinning fast enough to make much boost. If it were even possible to gear the blower so that it would spin fast at low engine speeds, it would then make too much boost at higher engine speeds.

Roots/Blower Supercharger

The Roots blower is the simplest of all blowers and therefore is also the least expensive. A Roots blower does not compress the air inside the supercharger. It is actually an air pump. The compression of the inlet charge (creation of boost) actually takes place in the cylinders and the manifold. Centrifugal superchargers and screw type superchargers are called "internal compression" blowers because the air compression takes place inside the supercharger.

Cold Air Intake

However your engine gets the air, cooler air is always better than the hot air right next to engine. Depending on your vehicle model a wide array of combinations are available to add 10-20 horsepower.

Throttle Body

Don't let your throttle body be a bottleneck in your air flow. We recommend a Nick Williams 102mm to mate up to the larger cold air and intake manifolds.


Intake Manifold

The more air you can deliver to the engine the more power it's going to make. There are various intake manifolds on the market claiming better flow and larger air inlets adding 20-35 horsepower.

Nitrous Oxide

Nitrous Oxide Systems and kits are a great way to add power to your vehicle. Nitrous injected into the cylinders allows more fuel and oxygen to be burned, producing more power. There are various stages or shots used to bump up the horsepower. These systems can be button activated or computer controlled to ramp up the power gradually producing ideal results.

Methanol Injection

Reduce air inlet temperatures, thus increasing boost pressure (or timing advance on forced induction gas vehicles). It works by allowing you to determine the water/methanol mixture up to 50%.

Computer Management

If you have invested a lot of money into a engine program (which most of us do), it is a very good idea to protect that investment with an actual working fault management system controlling and monitoring everything from OEM fueling strategies, flex fuel control, traction control,  individual cylinder knock control, boost control ,  launch control,  4 stage nitrous control, perfect idle stability, perfect start up,  fault management, fuel pressure compensation,  complete automatic transmission control etc

Pulleys

Pulleys are a great way to free up horsepower to improve your vehicle's performance. They reduce the power used to turn accessories so that extra power can be used at the transmission.

Heads & Camshafts

Internal combustion engines are, simply said, air pumps. The more air you pump into an engine, the more air/fuel you can burn, and the more power you can make. Building horsepower is not quite as simple as that, but it's the basic concept. The cylinder head is the main component that flows air/fuel in and exhaust gases out. Needless to say, the cylinder head is a major component in building horsepower and torque.

The key parts of any camshaft are the lobes. As the camshaft spins, the lobes open and close the intake and exhaust valves in time with the motion of the piston. It turns out that there is a direct relationship between the shape of the cam lobes and the way the engine performs in different speed ranges.

Headers & Exhaust

Headers are one of the easiest bolt-on accessories you can install to improve your engine’s performance. The goal of headers is to make it easier for your engine to push exhaust gases out of the cylinders. It works by eliminating the manifold’s back pressure. Instead of sharing a common manifold, each cylinder gets its own exhaust pipe. The individual pipes are cut and bent so that each one is the same length as the others, which guarantees that each cylinder’s exhaust gases arrive in the collector spaced out equally so there is no back pressure generated by the cylinders sharing the collector. Therefore, you notice more power and torque from your engine.

Clutch Disc & Pressure Plate

Stock clutch discs are excellent for daily driving and the occasional stomp on the gas pedal, but they will not withstand for very long the horsepower and torque that a racing engine will deliver. Because of this, the friction material on a racing clutch disc is much more rugged and sticky than a stock application. It bites harder and does not glaze, or become shiny, nearly as easily. A racing unit is also more thoroughly balanced to withstand higher RPM from the engine.

The pressure plate is what literally shoves the clutch disc into the flywheel. A racing pressure plate is capable of very high forces against the flywheel, which is measured in pounds. For instance, if the stock pressure plate in an automobile is rated at 2,500 lbs. of pressure against the flywheel, the racing application for the same vehicle will be rated at 5,000 lbs. This equates to stronger grabs at the start and a more solid feel all around. The pressure plates for racing are also precision balanced for high RPM engines.

Dyno Tuning

Dyno tuning is the only way to correctly tune a car for Performance. Mail order tunes are good, but since evey car is different, and every car has different mods a dyno tune is needed. Dyno tunes allow the tuner to see what the car is doing from the start, and he/she can adjust the ECM for a peak HP output. Based on what that one car is doing. Mail order tunes can only guess how you car is running based on the test model they had when they wrote the program.

How it works:
You car will be put on a dyno, and hooked to a laptop via the ODB port under the steering wheel. They will make a few passes with the stock car to get a base line reading. From there the tuner can adjust the air/fuel ratio, advance the timing, remove rev limiters etc. They will adjust many things while making dyno runs in between changes to find the very best combo for your motor.

 

 

241 Castleberry Industrial Drive   Cumming, GA 30040
(678) 513-7105
 
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