Jump to content
SAU Community

Recommended Posts

it's been proven before that you don't need the plenum changed unless you are flowing enough air for over 450hp.. also as mentioned before, it is a bastard of a job to do yourself and very expensive to make someone else do it for you (unless you know people in the trade who feel that they need a huge headache)

LOL GTST!

Your making it out like its rebuilding a motor! Its about 2 hours of welding & 2 hours of precision cutting & filling.

Its not that hard to do, provided you can weld aluminium. Lining it all up is the hardest part.

WLD747, ask around at Jap wreckers. youl pick one up cheap enough. Remember you dont need any of the bullshit stuff, (THorttles, linkages. etc) just the plenum.

Cheers guys,

Trev

I don't think GTST (Tolga from memory) is having a go at you.

Rather he's saying that any forward facing plenum on an RB25 is a lot of work installing because you have to eff around with FMIC pipes, injectors, rails etc. etc.

If you have the motor out, well fine but for a in car install, all the shite on the right side has to come out and some cutting of the metal under the washer bottle.

People do it for looks often and fair enough.

T.

Hi

I have a GTR plenum on my r32...

I bought the car with it on, my mates dad did the job, and i bought the car off him.

going by what he has told me...

BITCH! of a job, took him about 2 months to do, this was obviously not consistant more a weekend thing and he did it all himslef. it is not running 6 throttle bodies.

In my opinion the benifit is great, the car has got heaps of top end power but due to the short runners it loses power down low. The original idea was to twin turbo the rb20 but he ran out of time/money and didn't go ahead with it.

I have owned the car for a bout a year now and haven't had a problem, the only thng is I need more boost to take full benifi of the plenum..

PM me if you want to see some pics of the engine bay.

thanks Tony.

That is what I was getting at.

the picture above is with the engine out of the car so I guess it would be easier.

I also wanted to make a point that on an RB20 or RB25, you would have to have changed a WHOLE host of other parts, and be making HUGE power before the standard plenums become the restriction.

there is nothing wrong with the stock plenum, just it becomes more of a cosmetic change rather than performance. But reducing i/c piping helps!.

So why not run fmic pipes back under the coola past the air filter to the stock plenum?ceramic coat & heat wrap the pipes in the engine bay?wouldnt this be a good enough setup so you get less heat soak due to less piping in the bay as well??/ (i know there are shorter runs to a GTR plenum but theres money to be saved here for other mods especially when you dont know if the change is for looks or performance)but as far as iv heard the stock plenum is reliable for 450hp.Is this true?Tell us whats the power your chasing.Is it for a future engine upgrade?surely a setup like this would run cool enough for those figures.And while ur at it why not get a vented bonnet to keep those temps under controll.... :flamer:

So why not run fmic pipes back under the coola past the air filter to the stock plenum?ceramic coat & heat wrap the pipes in the engine bay?wouldnt this be a good enough setup so you get less heat soak due to less piping in the bay as well??/ (i know there are shorter runs to a GTR plenum but theres money to be saved here for other mods especially when you dont know if the change is for looks or performance)but as far as iv heard the stock plenum is reliable for 450hp.Is this true?Tell us whats the power your chasing.Is it for a future engine upgrade?surely a setup like this would run cool enough for those figures.And while ur at it why not get a vented bonnet to keep those temps under controll.... :flamer:

Many coolers do run back underneath and not over the top.

ARC and Apex do this.

Heat soak is not really all that important with FMIC as the gas velocity does not allow much heat to transfer.

Oh and I do have both an ARC cooler and vented bonnet :rofl:

I think again HPI and Ben Ellis set the standard with 292rwkW with the standard plenum and he's not the only one.

T.

My car has the stock plenum modified to face forwards instead of going over the motor, al-la gtr plenum, but sits at the stock hight and doesn't get in the way of anything.

I'm not entirely sure if it flows better or is better but it looks good and makes fmic piping a hell of alot easier, it will look even better with a good polish. Hope that helps, but i dont have a scanner to get pics... oh well :rofl:

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


  • Similar Content

  • Latest Posts

    • Nah, if I need to fit people in a car I'll just use the Mrs car, the MX5 is perfect for what I need as a fun little sports car for fun on the street As for getting in and out of the MX5, I have no issues as I am a short arse who does lots of mobility training 🥷 If anything, I have been looking at Daihatsu Hi-Jets for a work hack, I helped one of my mates move some stuff with one recently that he picked up from Just Jap, it was a little ripper and plenty big enough for what we needed, it would also be super handy for me as I do alot of gardening, and plan on having some veggie patches and native gardens in the place I buy next year when I retire I did alot landscape gardening and growing veggies prior to my current job, and loved it, and that is a hobby that can keep me sane in my retirement, and as such, the little 300kg load capacity would be more than enough for what I need it to move around I have been looking at utes for just this purpose for a while now, and a near new 2024 Hi-Jet can be had for under $30k And I would rather look at a quirky little Hi-Jet than pretty much any other little ute, well, apart from a Brumby, I love the little Brumby, and weirdly have never owned one yet I was going to buy a heap of raffle tickets to try and win the Brumby that MCM built for Subaru Australia, but sadly I totally missed the raffle, I even filled in some form to be told when the raffle started so I could buy tickets, but to my dismay I was never contacted and found out I missed it when I was randomly googling Brumbys last year... #conspiracy  Maybe I should just buy a Brumby for a little "work hack".....LOL I use to be indecisive, but now I'm not sure
    • Well.... it's not just "de-oxygenating". If you do that you just have, most likely, ethane. So you still need to do a synthesis step to combine a number of ethanes/ethanols to make circa-8-chain hydrocarbons. And of course you don't want straight chain HCs, because n-octane actually has a negative octane rating (ie, it's worse even than the n-heptane which sets the zero on the octane scale!), so you have to do some tricky catalytic chemistry to synthesise branched HCs. That's all doable - but it doesn't come for free. And.... it starts with ethanol, which is an agricultural product, and there will almost certainly never be enough of that as a base stock to replace the liquid fuels that are in use. You really wouldn't want to be planning to be using any more ethanol for fuels than is currently already used (in E10, E85s, etc). And ideally you'd be looking to reduce such usage, as it is largely wasteful, particularly in the stupid-ole'US-of-A where the corn lobby has organised it so that it's actually primary production corn that is used to make a lot of the ethanol, not by-products and waste, like it is (mostly) elsewhere. So, what I said about needing free-ish energy probably still applies. True synth fuels would be made from H2 and CO2, in a near reversal of the combustion process. In fact, given that the H2 would be split from water first, it actually is a complete reversal of the combustion process. But...energy intensive. The human race burns something like 1 cubic MILE of crude oil, after it has been made into various fuels. Every year. That's a simply stupendous amount of energy. Just assume that the density is 900 kg/m3, and that the calorific value is 45 MJ/kg, then that is 165.9 x10^12 MJ of energy. Or more than 10^19 Joules. You get a maximum of 1 kJ/s per square meter solar radiation falling on the planet's surface, and so if you halve that for daylight, and halve it again for average weather (highly optimistic) and then take ~25% for the very best efficiency of solar panels, then you need about 85.7 billion square metres of solar panels to generate enough electricity to replace that liquid fuel energy consumption. Each panel is about 1m2. That's a rather large number of panels. We also burn about a cubic mile of coal. We also use hydroelectric power. We also use nuclear. We also use a number of other sources, both "renewable" and not. You can kind of ignore the renewable ones (except for hydro, because it will all end up getting subsumed into pumped hydro for storing other renewables, and so it won't be the standalone renewable that it originally was), so we end up needing a multiple of the ground area number that I just arrived at.
    • Corvette thread then? Don't say I didn't predict the future again. "I love the little MX5, I do, but I just want something a little easier to get in/out of, a little more cushy and some power would be nice - I miss the V8 Rumble... I found this clean red C5 for sale recently and..." I'll do you a great deal on the next step, which is one of those but you can fit people in it, too.
    • What about renewable diesel and/or gasoline? I see some projects spinning up like de-oxygenating ethanol to make drop-in compatible bio-gasoline especially in CA. I still think the future is EVs and we should've all gone full throttle on nuclear power after the 1973 oil crisis like France. Despite 15 years of work in CA to reduce the CO2 intensity of generation with renewables our electric grid is still far worse than even "low carbon" nuclear power. ICE is pretty cool when you aren't depending on the stupid thing to be practical and reliable and cheap as possible to get you to work every day. It's kind of like mechanical watches or vacuum tube amps.
    • I just rolled over "my" first 10k km in the MX5 Every time I go anywhere it always ends up in a adventure to look at houses and find some random country roads I've been on leave since early November but unfortunately need to go back to work on 19 January Luckily though I still have a fair chunk of leave left to burn until.... Not that I'm counting 😁
×
×
  • Create New...