Plenum Modification

[sky017]

hey guys , after doing a bit of extensive reading lately on the forums about the rb25 neo engine and the thought of installing an aftermarket plenum , iv come to the idea of having the standard plenum modified to face forward . i was wondering what everyones opinions of this are ? as iv been reading there is a fair bit of modification needed , ie : custom aac valve plate , different 0 rings , a fair bit of movement as far as hoses go etc , TCS is in the way - would this be easy to remove without effecting anything ?. also on top of all this i had read one member stated that even with all this done , the car didnt run any good and he ended up returning it back to the standard setup.

now in saying this does anyone body know of , or recommend anybody in sydney to perform this?

will the car run accordingly if this modification is carried out correctly?

and finally what would this cost if anyone else has had this done?

any info would be greatly appreciated

[XRATED]

Oh my...

What are you trying to achieve?

- Performance...? I can't see a performance gain. Infact all I can see is poor flow distrobution???

- Looks...? Looks waaay to ghetto fab to me, but I guys that's personal taste???

- Shorter pipe work..? well yes... but at what cost? I'll also add- I will garantee you would not be able to tell the differnence from driving the car on a back to back test!

Not to mention there are so many fantastic options for forward facing plennums- WHY BOTHER?

Cheers

Justin

[sky017]

thanks for your reply

i know in general there isnt any hp gain with this mod as iv read over and over , mainly just throttle responce. at the end of the day itd be good to have an engine without the cross over arm , thus making the car much neater and more easier to get around when working on it. shorter pipe work will be beneficial , besides i dont really want that huge amount of pipe running around over the fan and down to the intercooler like most cheap intercooler kits.

my main question of doing this was , if no body recons you get any more hp out of it , why bother buying somethng over $800+ to cut out 1 meter of pipe , i mean thats all it does , maybe increase flow ? no one ever notes how much more powerful their car has become of it ?

[zoidbergmerc]

This guy

https://www.plazmaman.com/shop/index.php?action=item&itemId=18

Best $900 I ever spent.

Or you can do what I did with my VLT

If you're into Ghetto fab that's pretty ghetto IMO

[sky017]

i know of the plazman , its probably the best and most popular going around so iv seen, and no ghetto here lol , i was just curious if anyone else had done it as a cheap cost effective way

[zoidbergmerc]

I wouldn't bother unless you're going to go whole hog either like I did so you've got a bigger area in the plenum and\or getting a bigger throttle body. It might be worth while if you got a bigger throttle body, or get two throttle bodies!

[PM-R33]

People used to do that plenum modification years ago when there were bugger all upgrade options for the RB25DET and Neo.

Nowadays there is absolutely no need to go down that route.

I love my Plazmaman plenum and the only thing I would swap it for is a Hypertune plenum (but they don't do them for RB25's off the shelf).

[ovrtym33]

i did this modification about 4 years ago, cost me $450

havnt had any prolems at all on my forged engine and still good for my 350+rwkw

[XRATED]

I wouldn't bother unless you're going to go whole hog either like I did so you've got a bigger area in the plenum and\or getting a bigger throttle body. It might be worth while if you got a bigger throttle body, or get two throttle bodies!

Ha ha... I kinda like it. Any more pictures?

[N1GTR]

Yeah same!!!

Love seeing something different in the community rather than another copy greddy setup

[jangles]

I wouldn't bother unless you're going to go whole hog either like I did so you've got a bigger area in the plenum and\or getting a bigger throttle body. It might be worth while if you got a bigger throttle body, or get two throttle bodies!

Its NA isnt it?

[Simon-S14]

Looks like it

[zoidbergmerc]

Ha ha... I kinda like it. Any more pictures?

Prolly want to PM SKiT_R31, it's his car, fkn mental machine, revs to like a billion RPM, so nice.

Yes it's NA. RB30DE

[bubba]

Can't find the photos but I've got a GTR plenum chamber with a Q45 flange on the front, welded to stock RB20 runners.