so i have a ej1 with a b18c1 swap this is my build


b18c81
4-2-1 headers
cold air intake
chipped p28
skunk 2 megapower exhaust
ported head
titanium valves and retainers
exedy clutch stage 2

i just wanted to upgrade my intake manifold i heared a couple things from people that stock manifold is better than aftermarket and sometimes u lose power i was thinking of getting a blox intake manifold will i feel power difference or just stay stock??help me out guys im a new to these motors!!!

 

I'm loving my Skunk2 Pro series. Can't go wrong IMO.

 

have you thought about tuning it yet?

 

Skunk2 is great. I'd personally aim for cams and a good tune first though. =\

 

Stay away from the edelbrock manifold at least, the runners are too short. The Skunk2 is supposed to be good. Long runners are good for low end power and short runners are better for top end. It has to do with harmonics and waves, but in short, the very short ones will stink for a daily driver.

Since you have a P28, you should use an aftermarket intake. The stock ECU is the only one that can activate the IABs.

 

Which is why, in general, the OEM intake manifold is the best choice on a GSR. It has both short and long runners, and switches between them with the IAB system for the best of both worlds.

Unfortunately, this is true, from what I've heard. If you're using a P28, you should definitely go aftermarket.

 

what if i keep them open all the time instead of them activating?

 

Ported victor X FTMFW better runners than sk2 IMO