Jump to content
SAU Community

Plenum Modification

sky017

By sky017,
in Engines & Forced Induction

 Share

Recommended Posts

sky017 Proficient

sky017

Posted
Posted

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

post-32277-0-93386700-1302545804_thumb.jpg

Link to comment
https://www.sau.com.au/forums/topic/360594-plenum-modification/
Share on other sites
XRATED Veteran

XRATED

Posted
Posted

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 Proficient

sky017

Posted
  • Author
Posted

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 Mentor

zoidbergmerc

Posted
Posted

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!

205536_1673009067913_1318014972_31385937_6989746_n.jpg

PM-R33 Grand Master

PM-R33

Posted
Posted

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).

XRATED Veteran

XRATED

Posted
Posted

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!

205536_1673009067913_1318014972_31385937_6989746_n.jpg

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

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • The Bogan
      NC MX5

      By The Bogan · Posted

      Version 1 aluminium airbox is.......not acceptable No pics as I "didn't like the look.....alot" Even after all my "CAD", and measurements, the leg near the fusebox just didn't sit right as it ended up about 10mm long and made the angle of the dangle look wrong, the height was a little short as well, meh, I wasn't that confident that Version 1 was going to be an instant winner I might give Version 2 another go, there's plenty of aluminium at work, but, after having in on and off a few times, and laying in the old OEM airbox without the new pod filter and MAF, there may be an option to modify the OEM air box and still use the Autoexe front cover and filter.... maybe This >  Needs to fit in here, but using the panel, and not the pod, the MAF will need to fit in the airbox though> I'm thinking as the old OEM box and Autoexe cover that is sitting in the shed is just sitting around doing nothing, and they are relatively abundant and cheap to replace if I mess it up and need another, it may well fit with some modifications to how the Autoexe brackets mounts to the rad support, and some dremiling to move it get in there, should give me some more room for activities, as I don't want to move the MAF and affect the tune Sealing the hole it requires to stick it in the air box is simple, a tight fit and some pinch weld will seal it up tight  I am calling this a later problem though
    • Dose Pipe Sutututu
      Ethanol Content Sensor - Always at 11%?

      By Dose Pipe Sutututu · Posted

      and it ends up being already priced in as though you're just on 91RON without any ethanol. Car will lose a bit of economy as the short and long term fuel trims bring down the AFR back to stoich or whatever it is for cruise/idle for the engine.  
    • soviet_merlin
      Ethanol Content Sensor - Always at 11%?

      By soviet_merlin · Posted

      Oh, you are right. But, in Australia E10 is based on 91RON fuel and ends up being 94RON. Hence it being the cheaper option for economy cars. The more performance oriented cars go for the 98RON fuel that has no ethanol mixed in. The only step up we have left then at some petrol stations is E85.
    • niZmO_Man
      Lock up the old for sale / wtb threads.

      By niZmO_Man · Posted

      There is a warning that "this thread is super old" but they ignore that anyway...
    • TurboTapin
      Ethanol Content Sensor - Always at 11%?

      By TurboTapin · Posted

      With 10% Ethanol, we're talking 2-3% fuel consumption difference. The emissions reductions and octane boost in my opinion far outweigh this almost non existent loss.    My tanks sitting at 80%. Luckily that should go down fast as I'm on vacation again for the next two weeks. 
×
×
  • Create New...