Rb25 Intake Plenum

[R33NT]

I went to APC the other day and i saw a RB25DE plenum which looked very similar to the greddy item. It apparently uses the standard injectors and a Q45 throttle body but is a cheap casting job.

Has anyone actually had one of these fitted with good results?

I ask because i have a crappy cut and shut with a front feeding (like GTR) inlet and i would like to replace it with this one if it is any good. I believe they said it costs around $700ish.

[funkymonkey]

or you could spend another $300 and you'd have a real GReddy plenum?

[R33NT]

True but i am told the Greddy item doesnt take the standard injectors.

[sky30]

also interested to know how good these plenums are. Anyone??

[2BNVS]

contact ISL-33P his plenum shits on greddy ones and alot cheaper

ben...

[Gts-t]

or you could spend another $300 and you'd have a real GReddy plenum?

<{POST_SNAPBACK}>

Does the real Greddy one bolt to a R32 RB25de head though, i am trying to locate a decent front facing plenum that will.

Thanks funky

[R33NT]

I checked out ISL-33P and his profile says a custom plenum (exchange) costs $1000 where the one i am talking about costs $700ish (from memory).

[paulr33]

what are you hoping to achieve by changing the plenum? its been covered many many times on the advantages and disadvantages of changing the plenum

[Gts-t]

I checked out ISL-33P  and his profile says a custom plenum (exchange) costs $1000 where the one i am talking about costs $700ish (from memory).

<{POST_SNAPBACK}>

Where is APC, i would love to see some pics of the cast one.

Also paulr33, i need a front facing plenum like the greddy one for a 25/30 engine conversion so i dont have to lower the motor to far and can keep my strut bar.

[2BNVS]

i have a 25/30 and for 1300 ariel (ISL33P) created a custom plenum that flows a shitloads more than most top jap brands (has flow tests to prove and also comes with 80mm throttle body and bolts to stock runners and fuel rail

ben...

[MYSTR33]

pics to [email protected]..

much appreciated..

[N I B]

Not sure about the RB china Greddy copy but early this week i did an SR Greddy copy on a basic S13 that fell from 280rwhp to 246rwhp and could not recover the power by retuning.

I read somewere that the real thing does much the same.

[2BNVS]

heres 2 pics, its not fully polished up yet though

ben...

[Roy]

It looks pretty, but id be much more interested in seeing pics of it dismantled, or in behiond the throtltle body

[2BNVS]

ill get pics of the inside tomorrow to try and show how its pretty much full smooth theres no weld marks inside, no rough surface at all, and has been bench flow tested with less than 2% change within all 6 cylinders which i have recently seen a greddy one bench flow tested and it aint even close to that

ben...

[PHaT MR30]

std injectors and rail fits these plenums

[Bl4cK32]

std injectors and rail fits these plenums

<{POST_SNAPBACK}>

Why wouldnt they? He uses the std runners.

[Guilt-Toy]

Plazmaman Plenums are the best i have seen when looking to purchase a plenum. it works great and looks really good. They make em in some awesome 80tonne press.

go to www.gtr.com.au and have a look there (UAS) $1150

They are easy to install and use the stock throttle body (or you get another flange for any other type) and they use the standard gasket and runners.

Makes me engine bay look sweet and with the RB30DET i can fit my strut brace =)

They have been flow tested and proven to make power as well.

DYNO SHEET BELOW SHOWS RESULTS OF THIS PLAZMAMAN PLENUM & INTERCOOLER KIT FITTED TO A SKYLINE R33 GTS-T WITH STANDARD TURBO, STANDARD ECU (WITH FUEL CUT DEFENDER), STANDARD ENGINE INTERNALS, ADJUSTABLE EXHAUST CAM GEAR, RAM POD AND FULL 3" EXHAUST SYSTEM.

Edited February 9, 2006 by Guilt-Toy

[R33NT]

This is what the one from APC looks like.

The difference is that this looks like it is meant to be there and it is apparently identical to the GREDDY manifold but takes the standard injectors (not standard throttle body).

Edited February 9, 2006 by R33NT

[Guilt-Toy]

I heard the greddy plenums dont flow very well and give you less power output so this is a direct copy it would be the same?