Changing the intake & exhaust manifolds

[Pradamuimui]

Does anyone think that if I changed the intake and exhaust manifolds on my new 02 Si, with the intake and exhaust manifolds from a Type R...that maybe it would be beneficial in adding a slight bit of horsepower, not much but it woul help correct?? Second, would it be a safe mod???

[sicivic2002]

It would be a safe mod. People did it all the time with the B series motors. Think about this, the RSX non Type S has the same motor as the Si yet makes about 10lb more torque. The only difference I have found is the intake manifold.

Can anyone tell me whether or not an intake manifold could be the difference between 10lb of torque?

[02blksi]

just a thought, but does the type r manifold have the 2ndary runners in it? I dont think we have that in our manifolds, therefore im assuming some wiring/ecu changes may be needed to control the 2ndary's to open up.. but i could be wrong --joe

[madbrain]

Our intake manifold is a single runner just like the type-s the base RSX has the dual runners. The 10 lbs of torque are a result of the type-s compression ratio not the manifold.

[SpeedRacer]

Originally posted by madbrain
Our intake manifold is a single runner just like the type-s the base RSX has the dual runners. The 10 lbs of torque are a result of the type-s compression ratio not the manifold.

nono we arnt talkikng about the type-s why does the base model rsx have 10lb more trq?

[sicivic2002]

That's what I've been wondering if they are supposed to be the same engine. Somewhere waiting to be freed up is 10lbs of torque.

[2K2SilverSi]

The 10 extra lbs/ft has to be from the dual runner intake manifold and the fact that we have 2 ballancer shafts and the base rsx has none. That and the different grind in the cams sounds like the whole difference to me.

[sicivic2002]

I didn't know the cams were different. Thats good to know.