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Birth Of An Rb25

2rismo

By 2rismo,
in Motorsport Builds

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BezerkR32 Veteran

BezerkR32

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Yes, very nice. You will definately need those with the heavy GTR.... What are you doing with the old ones? Might be suited to very light GTST....

my car might be closer than ive made out...got some nice brakes for the circuit car today too Stewie...How does 375mm 6 spot AP's grab ya.
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BezerkR32 Veteran

BezerkR32

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did you take your medication today Jas?

With all those tight bends it will be interesting to see the pressure differential between your turbo (making the boost) and the plenum (pressure going into the head)
FineLine Grand Master

FineLine

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Im not knocking it dude, and I can easily see it is the only path for it, just interested in how it will affect the pressure.

Sorry, it's my engineering background nit picking.

If mine is anything to go by it wont affect pressure at all. I have some crazier bends than adrian owing to me wanting to do things a certain way and it certainly has no problems throwing up 500 plus ponies at the treads.

Once boost is made the whole system is under constant pressure so i fail to see how bends can have too much effect.

JAS-25T Grand Master

JAS-25T

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If mine is anything to go by it wont affect pressure at all. I have some crazier bends than adrian owing to me wanting to do things a certain way and it certainly has no problems throwing up 500 plus ponies at the treads.

Once boost is made the whole system is under constant pressure so i fail to see how bends can have too much effect.

Are you saying that you have the same pressure at the turbo as at the plenum? and no pressue drop?

Having a big volume of air going through those pipes with bends or reducers does affect airflow.

Especially under boost.

Although, for this application it may not be so important, i.e. 10secs at full throttle.

Think of why restrictors, aka washers, are used to control airflow in turbo cars in plenty of classes of motorsport to slow down the airflow.

also think of things like match porting exhaust manifolds or intake manifolds/plenums instead of leaving the sizes different?

2 stroke exhausts with expansion chambers are another example?

Should I continue?

Anyway, as Adrian has pointed out already, the piping runs are dictated by the space available. It's quite clear that this is the case.

Slide Grand Master

Slide

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And when you run out of boost to throw in it you can always get a fist full of Maccas straws, connect them together, run them from a hole in the intake and blow into it from the drivers seat, i know you can build some pressure Adzy boy :laugh:

You would blow half of the Viet pro's out of their knickers, literally. Ha, pity you cost more, my bottom still hurts lol

2rismo Grand Master

2rismo

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And when you run out of boost to throw in it you can always get a fist full of Maccas straws, connect them together, run them from a hole in the intake and blow into it from the drivers seat, i know you can build some pressure Adzy boy :laugh:

You would blow half of the Viet pro's out of their knickers, literally. Ha, pity you cost more, my bottom still hurts lol

BWAAAAHAHAHAHAHAHAHAHAHAHAHAHAHHA......<big breath in>....BWAAAHAHAAHAHAHAHAHAHAH!!!!!!!!!!

2rismo Grand Master

2rismo

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Had the radiator serviced and a new cap fitted. It was more blocked than I thought so it should be all good now. Mounted and wired up the 2 x Maradyne thermo fans using both the factory switch and a manual override so I can have them on even if the engine thinks they're not needed. Also wired up the low-oil pressure switch and light and the Tech Edge Wideband unit and display. The backlight on the display is really good and dead-easy to read. Very impressed.

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