Hey guys im new here and i have been searching on google and all over this site for answers but it seems like everyone is saying that its pointless to upgrade the intake manifold on a gsr unless you are doing a full on build, i guess my question is, is there a good manifold that will give you and low and midrange power , or should i just stick with the oem manifold until i decide to build my motor?

 

For low and midrange power, you won't find a better manifold than the stock one. The dual runner design helps to maximize air flow throughout the rpm band. Aftermarket manifolds are all single runner and vary in port diameter and runner length but typically are made to put out max hp at the upper part of the power range. The actual hp increase may be negligible, depending on the manifold, but it'll all be at higher revs.

To realize the "benefits" of an a/m manifold you would need a programmable ECU and have the car dyno tuned. Things like VTEC engagement and fuel injector duty cycle would need to be modified.

If you are just starting out, I think your money would be better spent elsewhere.

 

Yeah i was just wondering because i have a good deal on a spoon header and a skink 2 i/m and i already have rsr exhaust 2.5" so i was trying to find out if it would be beneficial for me to get it anyways and then possibly sell it to get something that would suit my cars set up a little better

 

no

 

To make more power, you need to eliminate 'bottlenecks' in the system. The OEM GSR intake manifold isn't a bad piece, it has dual runners with IABs to regulate airflow at lower rpms (to maintain air velocity and therefore, torque/response) which, if they operate properly, open to allow the engine to breathe in the higher rpms. If you were to run more aggressive cams with a good header/exhaust, then the intake manifold would become a restriction. For now, it seems like money wasted...

A DIY cheap fix you can do at home: Open up the manifold, remove the butterfly valves, rods and other hardware, port the plate and manifold into a large open plenum with a dremel/die grinder, add gasket maker and away you go

 

Removing the butterflies reduces low and mid range torque.

I still have the OEM intake manifold with a functional IAB on my B18C1.

 

If it ain't broken, don't fix it. 94

 

word.. keep it stock for now. unless your doing a build where you gonna need more air..