Frequently Asked Questions

Most frequent questions and answers

No, in fact, there are many people who posted that it has increased their gas mileage as long as they weren’t stomping on the gas pedal.

The MREV2 is an option, but because you already have a plenum spacer, it will add another 2-6 HP at various parts of the power curve. Predominantly in the midrange.

You can reset the ECU with the brake pedal if you like. Its really easy to do but it will also erase your radio presets. The ECU reset by the pedal method takes a little more time but it does not erase your radio presets like the battery disconnect method.

No. The spacer by itself doesn’t do anything on the stock REVUP lower collector. It must be used with the MREV2. When used together, it makes the most effective bolt-on short of nitrous or turbo. A minimum 15HP and 18TQ. Many independent tests have dynodin excess of 20HP and 30 TQ. If you can only do one or the other, do the MREV2 first. It will make substantial upper midrange gains. You can always add the spacer later for additional power at high RPM .

The Iso Thermal systems allow the plenum assembly to run much cooler than stock and are good for about 1-2 HP more than the basic spacers. The regular Iso Thermal is generally for warm climates like California, Texas and Florida where it may only occasionally go below freezing. The Copper Iso Thermal systems are set and forget and they are compatible with any climate hot or cold.

Its not necessary to install the CCV but it is better if you do. Iso Thermal does not make HP but it does prevent the loss of it. Its good for about 1-2 HP by preventing excessive plenum heat soak as your engine becomes hot. And yes, you will generally leave the CCV closed. Iso Thermal or Copper Iso Thermal is beneficial no matter how hot or cold it gets in your area. Cooler, denser air

No. Its actually the other way around. Hot coolant is flowed directly out of the engine (at about 210’F) and into the plenum assembly. The purpose of this is to heat the plenum which in turn heats the attached throttle body. The throttle body is heated to prevent ice formation on the throttle body butterfly valve when driving in very cold weather. This is to prevent lean stalling of the engine when you let off the gas. But it is not always necessary to heat the entire plenum assembly. In fact, better engine performance can be attained by not heating the plenum assembly.

A hot plenum assembly heats the incoming air and hot air increases the tendency for ping and reduces air density. So weather you live in a hot or cold environment, other than to prevent throttle body ice formation, there is no need to heat up the incoming air charge.

Most people do it themselves in about 1.5 hours but if you don’t feel comfortable with doing it, bring it to a local shop.  For a better idea of what is involved with the installation, download a copy of the installation manual from our website.