Making An R34 Gtt Plenum Forward Facing

[KiwiRS4T]

Gibson solution:

[GTSBoy]

I wouldn't use the Gibson solution (or any variation on it) without putting some turning vanes into the elbow. That bend is just so tight that the flow will crowd the outside of the turn and badly bias the flow entering the plenum. Turning vanes would prevent that, and are not an enormous hassle to get right.

[scotty nm35]

Worked ok for them.^^

There is a fair bit of pipe before the plenum opens up, through the throttle. I doubt it would make much difference to distribution. The VQ25det plenum has a 180 bend right before the runners and works fine. That said, I agree you want to soften any tight bend you can to improve flow.

[GTSBoy]

I don't know of anyone who has seen the inside of the Gibson elbow. Knowing how far ahead of everyone else they were back then, I wouldn't be surprised to see at least one turning vane in that elbow!

[scotty nm35]

There are no vanes in the bend, I just asked.

[R31Nismoid]

Well if I go exhaust manifold I will definately see a big improvement for money spent

To be honest, you really wont.

Be nice if I didnt have to, looking at getting a hypergear ATR43 SS2 BUT Stao said 280kw is the max from standard ex manifold and internal gate.

Well people have made 300rwkw-320rwkw using Garrett-IW turbos (IW = internal wastegate)

Not the most ideal setup, but certainly the most cost efficient if you are dead set on a number... So i must say...

Lose the 300rwkw "I must have it" in your brain, settle for 270-280rwkw and just get a bolt-on hi-flow, stay totally safe from Police and look factory. Win-Win IMO

Otherwise you'll be spending upwards of $2000 more and I tell you now, for the extra 20rwkw - you won't really notice it/justify the cost.

The way i see it - either go for 350rwkw and justify the $2000+ spent or settle for 280rwkw.

Plus there is everything from brakes, clutch, diff, exhaust etc etc that needs attention and I can say with certainty, you've not really touched those areas

[jase_c]

probably a good call Nismoid, 300 was just the number i was aiming for but not hell bent on it so i can always get the turbo and put it on and get the rest later on. No clutch, its an auto which is even more $$ when looking at that power.

Can anyone confirm hi mount manifolds and FFP=illegal in QLD?

Edited June 18, 2013 by jase_c

[GTSBoy]

Can anyone confirm hi mount manifolds and FFP=illegal in QLD?

It's not what's "legal" and what's "illegal". It is actually possible to get anything engineered. In Victoria, if you were to put such stuff on your car a cop would have an orgasm the minute he opened your bonnet. If you had papers saying it was engineered, he'd have to wipe himself off and go bother someone else. But getting an engineer in Victoria to approve such mods might be getting harder these days.

QLD is less of a problem. The cops will still want to defect you for big highmounts and FFPs and so one because they are clearly a MASSIVE modification of the vehicle's stock emissions control systems. You might get more leniency from a QLD cop, and you might get an easier time getting a mod plate for it. But it is still absolutely true that without any engineering at all, it is not road legal to put such stuff on your car.

I put an RB25 into my R32 recently. Despite it being possible to ride around in SA in a car that has failed roadworthy in every state in Australia (other than SA) because we have no annual checks, I had to present my car and the engine in a 100% roadworthy condition. One of these conditions was that the factory turbo, inlet systems, ECU, valve timing systems, etc were all present and working. My certificate of exemption (from the original granting of road legal status represented by my import compliance plate) states that these conditions must remain true. If I am to have any mods at all (to the turbo, boost control, etc etc) then they all have to be engineered and run back over the pits at Regency. QLD is different in the details, but the intent of their rules is the same. Standard = good, modified = baaaaad!

[jase_c]

But really how many guys out there with high mounts or FFP's would have them engineered? Something else to think about tho before commiting myself

[Marcus89]

But really how many guys out there with high mounts or FFP's would have them engineered? Something else to think about tho before commiting myself

Not a whole heap but what's the point in the end? Particularly in terms of FFP they have been shown to be a mostly pointless exercise.

Exhaust manifold go the low mount for less hassles but even better do as others have said and get a hi flow.

In my car I have a FMIC, larger turbo, boost controller amongst other potentially defectable things but everytime a cop pops my bonnet they lose interest straight away cause it looks mostly standard

[jase_c]

Already have a hi flow, I am going a larger turbo

Edited June 18, 2013 by jase_c

[Marcus89]

What power do you have currently then? if your pushing 270/280 there isn't much point going for 300 unless you aim bigger like 320

[jase_c]

240kw

[Dose Pipe Sutututu]

hope your auto box is up for the power

[scotty nm35]

It should last a little while with a shift kit as long as it's got a big cooler...

[jase_c]

Its not happy, but I have another one coming thats good and have my MV autos shift kit to go in it.

[mick-r34gtt-]

Just wondering if anyone has tried getting a ftp for the rb20det and remove the bottom part of it and making a plate up (lazer cut) to fit the rb25det NEO as that's what I'm looking into! Does anyone has the measurement of the ffp rb20det the aftermarket one?

[mick-r34gtt-]

Ffp not ftp....