Extend the FMIC/IC Piping from another Post ...

[Demonic240]

As to the discussion from the post pertaining to the problems fito seems to have. Wulfgang and rbsileighty seem to think that the best solution thus far is the stock manifold. My question is, does anyone know buy looking at the upper intake plenum that tophat performance is developing, may be inclined to produce the same result as fito's problem if the same hp range is given? Discussion and comments would be appreciated.

[rbsileighty]

I would imagine it would, which is why I have chosen against it in favor of using the stock manifold with a 120 deg curve off of the TB as in this photo (don't mind the words in the pic):

[Demonic240]

I definately appreciate your reply, considering this subject definately caught my eye, because I am doing a rb20 projects as well (seems like a growing phase lately) .. that be near that level of HP ... and don't want to waste money if it's going to be troublesome.

[dekand]

heres some pics of the same style piping design, its what im doing on my 25.

[Bluefire]

Hmm I wonder where and how much it would cost to flowtest my greddy manifold since it is not installed yet. I remember on the skyline forums someone flowtested the stock manifold and showed that there was leaning on the first and sixth cylinder. Apparently its not a problem until your pushing like 400-500 hp... Anyways if anyone know a place in socal that could flowtest my greddy manifold and even stock manifold for cheap I would be willing...

-Bluefire

[Wulfgang]

I want to use the stock intake piping and go with one of these:

[dekand]

yeah i was thinking about somethign like that too... dunno though