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Rb25Det Front Face Plenum

linerlover

By linerlover,
in Engines & Forced Induction

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linerlover Rookie

linerlover

Posted
Posted

So I have just bought another r33 liner series 2 and I'd soon like to upgrade the factory plenum to a front facing greddy style. I'm a cnc machinist and have the skills and access to machines to make most adaptors that I think I'd need to change the plenum whith out having to do any aftermarket upgrades such as afm and computer. Just for the moment id like to keep the stock computer running. So my questions are what things will I find that need to be changed or replaced when changing my plenum. Eg throttle body, injectors / rail, bov etc.

For the moment the main purpose is so I can setup a fmic without having the stupid crossover piping that is mostly required when doing a fmic. I don't want to use one of those fmic that have both pipes on the passenger side like factory.

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https://www.sau.com.au/forums/topic/441669-rb25det-front-face-plenum/
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89CAL Grand Master

89CAL

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Posted

I like mine because it tidies up the bay so much. Not sure about with a stock computer. It would possibly be either unsafe or too rich and run like a pig anyway. Theres also the question of leaning out the back 2 cylinders. Im not saying it does or doesnt happen but ive got my link g4 adding a bit more fuel to cyls 5 and 6

There is a huge thread about installing one and what you will need. Think it is in the forced induction section anyway

LaurelPWR Rising Star

LaurelPWR

Posted
Posted

I ran a greddy copy with a standard ecu no problems at all... Even had it on the dyno to do a power run before any major power modifications were started and all stats were sweet as far as I could tell. I'm no tuner tho by any means so don't take my words as the be all and end all haha I'm just saying I had no problems running one with standard ecu. My car had a 3 inch exhaust and front mount as well at the time...

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Proven to make siet all gains with low to mild powered RB motors..

That RB20 Propaganda fella Roy proved it on the dyno.. save money, buy awesome turbo, buy awesome injectors, buy awesome ECU and rip skids

linerlover Rookie

linerlover

Posted
  • Author
Posted (edited)

Fair call if you think it's pointless but I'm keen to tidy up the engine bay also. If an adapter was used for the factory throttle body, what else is needed? Do the injectors fit? What about the fuel rail? I saw something about std injectors needed a bigger o-ring to fit in the plenum properly. I want to know what I'm in for if and when I buy the stuff. If anyone can show a link to these threads as I'd like to read up on them a bit

Thanks guys

Edited by linerlover
89CAL Grand Master

89CAL

Posted
Posted

Injectors and rail fit fine, minor mods need to be made to the rail piping in some cases

I told you, there is a thread on here somewhere that shows you everything you need to do. Very in depth, and very detailed

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