Gtr Plenum

[skidkid]

Has anybody seen or fitted a GTR plenum to an RB25 with a throttlebody mounted at inlet. Thinking of do this mod to make inlet track shorter. Can I buy adapters to mount up to RB25 head? I have an EB T/body. Maybe I should buy a coulpe of GTR turbos, afms and ex. manifolds as well. I have just fitted an SAF-C so I should be able to tune to suit turbos. Could I use 1 Z32 afm or do I still need 2 afms. Would std comp. work with 2 afms?? Any real advantage with these mods?

[CruiseLiner]

none of that is gonna bolt on and for the hassle id just get a rb26 as its gonna cost ya abit in fabricating all those adaptors. stock plenum is good for bulk power anyway and just do the 180 degree bend pipework instead and 2 gtr turbos r a waste of time, just put on a big single instead saving all the messing with adaptors. i wouldnt be tuning it with an safc with twin turbos if it was me. spend the money on more useful mods like manifold/single turbo, intercooler, injectors, etc.

thats my 2c worth

Edited July 25, 2006 by CruiseLiner

[GoldZilla]

Don't forget the RB26 uses six individual throttles. There are GT-R style plenums availabe for the 25 with just the one throttle body spot at the front where the inlet is on an RB26 one, but they're not cheap...

Here's one available from Unique Autosports:

Also available in a kit with intercooler:

$1,150 for the plenum only, or $3,200 for the kit with FMIC and plumbing.

Check out http://www.nismo.com.au

[stasis]

Don't forget the RB26 uses six individual throttles. There are GT-R style plenums availabe for the 25 with just the one throttle body spot at the front where the inlet is on an RB26 one, but they're not cheap...

Here's one available from Unique Autosports:

Also available in a kit with intercooler:

$1,150 for the plenum only, or $3,200 for the kit with FMIC and plumbing.

Check out http://www.nismo.com.au

WOW 3.2k!! is it worth it?!

[CruiseLiner]

WOW 3.2k!! is it worth it?!

1/2 way to a rb26 engine, plus sell your rb25 for 3k and you could have a 26 almost. just gotta spend another million to make the 26 run in the stagea

if people make 400rwhp+ with stock plenum then why waste 2k on it when u could buy other gear that will make it 10 times faster.

[GoldZilla]

Exactly, so I wouldn't bother. Looks good, and makes the plumbing a lot neater, but there are no real gains to be made as far as power is concerned. Might reduce lag due to the shorter intake path, and being able to use a larger throttle body would be good, but the standard one is okay for most applications as it is...

[Ska]

Yeap everything that has been posted here has been posted 50ty billion times in the general section.

The plenum alone will only add bling, and the stock plenum is good for 400+hp so it would be a very expensive mod for little or no performance improvement, well at least on a RB25, havent read much on wether this improves performance on RB26..?

[slo-a31]

i've fitted the gtr inlet and exhaust maniolds to an rb25

they all fit but theirs 4 holes (2 inlet,2 exh)that need to be drilled and taped (head needs to be welded first).

[skidkid]

slo-a31 what about any real power gain? How much has conversion cost so far? Any pics?

[CruiseLiner]

if u want a ff plenum buy a greddy one for $900 and save adapting something that aint made for your engine, plus the fact the heads gotta come off to weld up the holes he mentions, and facing the head because it would get warped abit from welding it. twin turbos is not even worth bothering about when 1 single can make the same power and more and half the pipework, twice the room to work with and u dont need 2 dump pipes and all the water lines and associated stuff. it seriously is a not worthwhile idea when u could have a highmount gt30 for around the same cost and 1/10 of the stuffing around.

PM sydneykid and i bet he says exacty the same thing. i know twin turbos sounds good to tell people, but i think id rather say i got twice the power for the same money. gtr turbos are rubbish ceramic wheels anyway so u would need n1's or 2530s to go anywhere, and try 2k for a gt30, and $600 for a gate and $200 for water/oil lines compared to the exhuast manifold fitting work, n1 or 2530s are an easy $3500 minimum and then water lines to fit, twin dump pipes, inlet piping.

each to there own i just dont like people wasting money for the sake of saying its twin turbo. would u rather have 250rwkw max with stock gtr turbos or 300rwkw+ with a gt30 and it all bolts on?

Edited July 26, 2006 by CruiseLiner