Jump to content
SAU Community

Rb25 Forward Facing Throttle Bodie


ydr030
 Share

Recommended Posts

cut it off at the original position and weld in a bit of flat plate to make it flat the whole way down the side, cut a big hole in the 'front' of the plenum, maybe add a small section of pipe, weld it on again

Link to comment
Share on other sites

I have read that this can upset thew flow of air into the engine, the factory manifold is designed to flow air from the side and evenly into the cylinders, when you put the throttle body on the front it will allow too much air into the front cylinders and too little in the rear, so you run rich one end and lean the other... so baisically, do some reaserch before starting :D

Link to comment
Share on other sites

I have actually purchased a factory plenum with this mod and fitted it to my car - there is no change in performance (good or bad) that I have noticed if running most stock items. It makes the engine bay look so much cleaner and installing a FMIC means you dont have to cut your fan down either..

good fun sorting out the accelerator cable though :down:

Link to comment
Share on other sites

were did u get u get that factory front facing plenum from? n ne pics?

I mean it is the factory style plenum, however someone has already done what VB- said above and gave it the chop and move treatment. I can post a pic when I get home if still want to see..

Link to comment
Share on other sites

thanx 4 help,

i got to be careful here cos in other forums i have come across the other way, so dont take ofence ! vb that was d plan just not sure wat u do bout the coolant lines running thro throttle bodie ? do u just blok off ?

and travo no better throttle response ? thats really the only reason i want to do it.

Link to comment
Share on other sites

thanx 4 help,

i got to be careful here cos in other forums i have come across the other way, so dont take ofence ! vb that was d plan just not sure wat u do bout the coolant lines running thro throttle bodie ? do u just blok off ?

and travo no better throttle response ? thats really the only reason i want to do it.

Actually yes - throttle response, very good increase from about 60km+ (thats best place i noticed it and the reason i did it... god how i forget that?)

Coolant line is not needed if you move the TB up the front of the plenum. just disconnect and join the coolant lines together. I'll throw a pick up of mine shortly.

Link to comment
Share on other sites

Theres a company in the uk that do this conversion, most people i`ve spoken to have said you get better gains that a greddy style plenum, mainly in bottom end torque i think. I can`t find the pictures on there website, but if you google image search thor plenum rb25 there`s a few pics

here http://images.google.co.uk/images?ndsp=18&...tart=0&sa=N

hope this helps

Link to comment
Share on other sites

um, I've seen a few stock plenums converted into front facing, but that one is amazing... perfect job...

so when are you getting a new plenum...?

so what are you doing with this one? *hint, hint*

cause that one really looks good...

Link to comment
Share on other sites

Heres 3 pleniums ive made all have worked very well first one was with the standard tb and the other two i used XE falcoon tb's, my car is making 287rwkw on 13psi on stock rb25 turbo bottom end with 9.5 comp, with the plenium in the last two pics, also using the XE/XF tb you can remove the standard idle air control and use the air bypass in the throttle body, i will be making more of the pleniums in the first two pics for mates as they work well and cut out about 1.5 m of cooler piping

http://tinypic.com/view.php?pic=2q8d9js&s=3

http://tinypic.com/view.php?pic=33crg4p&s=3

http://tinypic.com/view.php?pic=29gmt14&s=3

http://tinypic.com/view.php?pic=vdlaon&s=3

Link to comment
Share on other sites

Hey Mikka33

All you have to do is remove the standard idle air control, just disconnect the wiring, plate up the holes and your ready to rock and roll, dont wory about the wiring you unplug, it doesnt have anything to do with the ecu

Hey Venom, can you elaborate on the sentence above?

Currenlty have the FORWARD FACING set up with standard throttle body but looking to change to xe/xf

Cheers..

Link to comment
Share on other sites

weld it onto the intake pipe coming from the outlet from the fmic to the throttle body..

*note this was on a fmic, with the typical setup with the pipe coming through the driver side guard to the plenum. this allows the bov to be hidden from plain sight.

Link to comment
Share on other sites

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



  • Similar Content

  • Latest Posts

    • I am going to chime in here and say that is very bad advice for a built motor, making decent power of 400kW+ Especially if the rings have been gapped on the looser side. The more power you make the heavier you need your oil to be to be able to maintain that suspension between the moving parts, if not you'll have journals and bearings making love and grenade a motor. Remember that all moving parts inside the motor aren't ball bearing and are journal bearings and require oil to separate the surfaces from contacting.
    • Yeah I noticed this just now. No doubt she will be running smoother next start😂🤣😂
    • ENR34 manual transmission transfer cases are 33100-23U00 which is shared with all of the R32/R33 GT-Rs and GTS-4s. And the C34 Stagea. Do not bother with automatics, that is a huge effort to swap and the car will be worse for it. And an automatic transfer case does not have the right housing for the shifter which comes out the back of the transmission and goes through the transfer case. I already posted my response on reddit but if you didn't see it there here it is: You have almost certainly damaged the transfer case, the only question is how badly. Nobody can tell you how bad without more information. If you have a giant hole in the transfer case pissing out all the transfer case fluid then you need a new one. If it's not that bad then the only question is whether you burned up the clutches. Drain the transfer case oil and inspect for metal on the drain plug magnet. Small black filings are normal. Big chunks of metal or a ton of black fuzzies not so much. Fluid should be nice and red. Any other color isn't great. If the color is reasonably red and there's not a bunch of clutch material discoloring it or anything like that you probably got away with insubstantial excess wear not worth trying to fix. If you have to rebuild or replace the transfer case keep in mind you have to pull the transmission to get it off.
    • As promised………… the first start. Rough and a few bugs to work out. Still she lives att.1cnTUvrWxiOZUFbg0S43m1VFUdDhxGBq3UU53bvtkww.mp4
    • Can I suggest a 15W50 oil is too heavy. Its a brand new engine - you should be able to run something like a 10W30. Shove some steel wool into your catch can  - more technically "oil/air separator" - so that the oil vapour has something to condense on.
×
×
  • Create New...