R33 Stock Exhaust Or 3" Full System

[Rossman]

just wondering...a full 3" exhaust system will make me use more fuel yeah?

1997 r33 gts-t

thanks

- Ross.

[R31Nismoid]

Fuel consuption is best measured by the right foot

[RB30-POWER]

Too true that.

The 3" will have the potential to increase economy as your removing restriction that would usually require more engine power wasted to push the exhaust gas out the restrictive exhaust.

Unless the standard car has a blocked cat, the gains will be neglible as i don't think the standard exhaust it that restrictive at stock power levels.

Edited December 29, 2005 by RB30-POWER

[32vspecII]

ive always gotten small fuel economy gains after fitting 3 inch exhausts

[Bunta]

I got a gain in fuel ecconomy at first but now it has dropped off to be worse The addition of a 3" tends to make the car run rich and make it use more fuel doesnt it??

[RB30-POWER]

General light load driving is done in closed loop mode.

The car relies on O2 sensor for mixture feedback.

Therefore it shouldn't run rich at all.

And

High load driving will be using open loop fuel maps, that are fixed values, apart from enrichment values, therfore it shouldn't run any richer either.

You must have other problems mate