Well, i got another questions for some of you guys, So i was doing some studying tonight, my skunk2 manifold vs the GSR manifold, Now i understand the whole runner thing.. but what about this..


Take a standard gsr manifold, Rip the BFs out, and w/e else, and put it back together.. vs a skunk2 manifold would it be a good Idea or not, i guess i could port and rip the bfs out of it and test it myself but i'm just tryin to save myself the trouble, whats the input on this would, Since i have way bigger cams then stock, benifit from this or should i just not contaplate it, i mean the GSR manifold was pure genius from honda, it did a great low end+ and high end + and didn't really lose any midrange..give me some info on this guys i'd really like to know i'm pretty sure if i get some good feedback, no ly, i'd probably do it this weekend and see what happens..

 

If you rip out the butterflies, it turns from a mechanical marvel that has a great compromise between low end torque and high end power into a basic OEM manifold with more congested runners.

Since you already have a powerband optimized for the higher RPMs that the Skunk2 is most effective in, there is no reason to put the OEM one back on.

 

Correct, but If any of you actually looked at the GSR's intake ports on the P72 head and the flow directions, you'll see why the GSR manifold works great with it....i understand the dual stage runners and what not, but just wat if...you know your always wondering and being this is a jdm b18c head, and i can decide to try this little trick out i just wanted some info before i go ripping my manifold off again..

 

go with the skunk2, its deff awesome and worth the money. The only thing is you probably should raise your vtec engagement to get the most power out of the modification and you might have to tune a little. but i'd deff recommend it

 

dude...i'm not a noob, my itr motor is fully built, i'm just asking if i should try it, i've had my s2 manifold for 2 years now...

 

Even if they do flow well for the GSR intake ports, the plenum is much too small and the runners don't flow as well as a Skunk2 (Type R replica) would for higher rpms. If you are itching for something more, get your intake ports done and port the Skunk2 to it.

I dug up this manifold tech article for you: http://www.team-integra.net/sections...?ArticleID=466

 

well then scratch what i said. h:

 

A ported and polished GS-R manifold with an oversized TB will probably be more effective than a Skunk2 manifold unless you're running a supercharged motor. My observation is that after market intake manifolds are too big and you lose velocity.

 

In that article I posted, it states that the TB should be proportional to plenum size, so an oversized throttle body on a stock GSR manifold with its tiny plenum will probably not help too much. I still really don't think that the GSR manifold will flow enough for higher lift cams at higher rpms regardless of whether it is ported and polished or not.

 

Yeah I don't really have any solid numbers to prove my theory, just my guess. The channels for the Skunk2 manifold is pretty freakin huge.