Front Facing Plenum And Manifold

[loymclure]

Got an email back from japparts.com.au they quoted me a nice tidy price on a aftermarket plenum and manifold package $700 + 45 shipping to canberra.

http://www.japparts.com.au/products/Intake/index.htm

Just a few questions.

What is the difference between top mount and low mount turbo manifold besides the obviese fact one will fit into the stock position and the other is mounted slightly higher?

Has any one tried one of these plenums or manifolds, if so whats the quality like?

How hard is it to install these badboys your self?

any help would be greatly apreciated.

cheers clint.

[captinsane]

High mount exh mani/turbo: if you go to high mount you will ned to get all new lines to ur turbo, new dumps, etc etc... i believe it adds close to 1grand on the cost of a turbo/exh manifold to get installed cause of new lines etc if you get it done boy others

Intake plenum: i don't know - the crossover pipe is anoying, but from what i hear there are no great kw gfains over going new plenums, and i'd want it tested on a flow bench to nmake sure that i wasn't leaning out any cyclinders cause of a dodgy ebay rip off design.

[GoldZilla]

Very true, the standard plenum is more than efficient enough to handle a decent increase in power, so unless you're aiming for 350+awkW, then the only real advantage of the front-facing throttle on the plenum is the shorter inlet tract from the intercooler.

Like captinsane has said, if you were to go with a high-mount, then the extra expenses involved would probably outweigh the benefits on a bang-for-your-bucks scale.

[loymclure]

i was looking at the front facing plenum in order to shorten the pipe from the intercooler so i wouldnt have to go through that much pain to get it fitted but sounds like its exactly the same amount of trouble.

So if i get a new manifoild but a low mount one i should still be able to use all my old lines etc?

[Brycey]

the intake/plenums on that site look like a greddy copies.. does anyone know how these (copys) perform? the greddys are suppose to be ace but i haven’t heard much about the copys

i have a plazmaman plenum in my RB25 240z project, it cuts out over a meter of the pipes required for FMIC. cuts the a fair bit of lag, delivers cooler air to the engine (compared to standard plenum FMIC setup) also tidys up the engine bay quite a bit.

as for high mount exhaust manifold, i think its just a easier way to make all the individual cylinder to turbo exhaust pipes all the same length.. and to also show off the turbo a bit more

[loymclure]

http://www.skylinesaustralia.com/forums/in...20copy&st=0

this was sposed to be the tester forum but unsure how far they got with actually testing it, there is how ever alot of awsome info on the desription of the ebay greddy copy ones have a read you might come across somin good

[captinsane]

truth is that i would love one... but the cost of a front facing pklenum when i could spend it on something else, with the possibility of it being a crappy write off and srewing me around is not worth it for now... not for my stagea and the power target i have anyway. And the cost of going high mount, cannot be justified. I'd rather spend the money on a VG30 high flow turbo which mounts up to the stock flange, stays out of sight so no bad attention from coppas, and i'm not wasting money on stuff i don't need (again, keeping the practicability and stock power figures in mind) as i would be probably not going past 300awkw by the time i am finished and completed (unless i go rb30/26 when i am rich and a rockstar - hi5 for awesome )

[loymclure]

F*ck it they look to be "OK" quality tell ya all what ill buy one and put it in and will post up my findings with those three mods.

new low mount manifold, the front facing plenum and the FMIC and ill see if i can write up some fitting instructions with pics.

cheers all and stay tuned.

[25GTT]

F*ck it they look to be "OK" quality tell ya all what ill buy one and put it in and will post up my findings with those three mods.

new low mount manifold, the front facing plenum and the FMIC and ill see if i can write up some fitting instructions with pics.

cheers all and stay tuned.

Nice, even though this is the stag section I would be interested on your finding as I have always wondered the same as well for my 33 gtst. Keep us in the loop as to the outcome and how it goes, perhaps in a "how to section" could save MANY members thousands of $$$ should it all go ok.

Good work!

[wolverine]

how about the simpler solution that is cheaper and worked for Gibson?

[Brycey]

theres still alot of pipe work there that isn’t needed

this is considered to be the "cheaper" option, works just as well as any front facing plenums or manifolds

if anyone cant tell whats been done, the TB outlet has been chopped and welded to the front of the plenum. pretty cool

also in that topic about the greddy intake, heres a comment on the copy’s

hey, guys those copy things are cheap but is shit. I bought those few month ago, u need to get some1 to tidy the surface, especially the face that attach to the engine block, is damn rough all around u can c little tiny hole on the top or too much on the bottom. It 100% need to be tidy up b4 u fit, as i tried to save that hundred buck and fitted and start, fuel and air leaking from the intake. Finally i told myself, do it once , do it right so bought the genuine greddy, u can tell the different.

Edited June 4, 2007 by Brycey

[wolverine]

a quick search on SAU will show that there is more than reasonable doubt about the effectiveness of cutting and shutting the factory plenum.

fred gibson was no mug. perhaps the better distribution of air is worth the 50cm of pipework.

[yokotas13]

the simple reason you get a topmount mani

to get a big ass turbo

you are limited to the size on teh stock manifold...i could only get so big of a turbo and not worry about spacers, or going topmount

other than that, its bling.

[captinsane]

absolutely... i wouldn't worry about the front facing plenum too much - cross over pipes still seem to work ok for these blokes (see pic attached), and the longer runners coming off the cross over manifold (as opposed to shorter runners off the side mounts on both the RB26 and 25) are supposed to give more production in torque (not that the 25 produces more torque than the 26, hell no it's a completely different engine farkin). Sure, they have a high mount intake mani, but they have spent 4+ grand on their turbo set up too it hasn't been in order to create bling cheaply or anything, it is purely practical, and a purely sexy rb25 at that also

the photo is taken from the "car season" drift team's rwd S2 stagea

[loymclure]

not just Bling,

It also has the advantage of cleaning up a bit of clutter over your engine, the one thing i real realy wanna know is does the pipe running from your front facing plenum to your intercooler get in the way of getting to your oil filter every time you have to do a service ? or does it block any thing els?

[yokotas13]

just get a relocation kit

[loymclure]

just get a relocation kit

what does this kit do for me?

[GoldZilla]

It moves your oild filter mount up onto your strut tower so that it's easier to reach when you do your oil and filter changes. Can be bought with or without an oil cooler. Most oil cooler kits come with the relocation kit included (not sure if all do, though).

[loymclure]

It moves your oild filter mount up onto your strut tower so that it's easier to reach when you do your oil and filter changes. Can be bought with or without an oil cooler. Most oil cooler kits come with the relocation kit included (not sure if all do, though).

cheers mate sounds like a plan any idea on what cooler kits do come with this relocation kit?

[yokotas13]

your best bet is to get hte Greddy relocation kit

And then get a UNIVERSAL oil cooler

and run your own lines

Summit racing has them for reference.

you can use a donor from many cars, including Mitsu Galant and others.

costs around 230 USD total