vtecgsr95

HI all, I have an FD, but one of my good friends has a N/A FC and bought a RB racing header and test pipe, and N1 apexi exhaust. I know on the FD you cannot run a full exhaust without a chipped ecu or piggy back for extra fuel. I am wondering if this holds true for the FC as well? I have searched and found nothing!

He did also mention something about a hesitation between 2500-4000 rpm's......Ill have to tell him about the the grounding issues!! Thanks for any help!

neofreak

yes, it's fine.

Icemark

you can run afull exhaust on a non turbo without changing the ECU, but if you have a 84-88 your aux ports won't work, and non turbos don't like any exhaust above 3" for a single or 2" for a dual.

Ocelot

Edit - useless, too late

vtecgsr95

Well, its like a 2.5" exhaust so he's good there. Whats this about the aux. ports though? Sorry, but I am not very familiar with the FC! Thanks for the help guys!

frank

Icemark

The 84-85 13B and the 86-88 non turbo engines use exhaust pressure to open a auxilery intake port in each rotor at around 3800 RPM. This allows the engine to make more torque at lower RPMs and more HP at higher RPMs.

davena7

what exactly is the grounding issue were talking about

AK_88rx7

so would he lose HP/torque then? or would the increased numbers from the exhaust negate the loss of those ports?

Icemark

Well with the ports wired open he looses torque down low. With them not opening he looses breathing and peak HP.

vtecgsr95

search brotha.......you'll find it!