silent running

Looking at various pictures of FMIC pipework, they all seem to circulate boost 'anticlockwise' when looking down at the engine from the front. They do a 180 degree bend out of the turbo go through the offside wing, through the IC, up past the battery then another 90 degree turn into the throttle body.

Now that got me to thinking...seeing as the aim in any intercooler plumbing installation is to keep bore as big as poss and bends and joints to the minimum, is seems a bit silly to have the 180 bend straight out of the turbo.

Why not have the boost circulate the other way round - i.e. exactly the same plumbing except you'd have a nice long straight run out of the turbo and still only a 90 degree bend into the throttle body.

I can't imagine it can be down to heat management. OK the turbo is the hot corner of the engine bay, so maybe it makes sense to keep the plumbing closest to the throttle body on the cold nearside of the engine bay. But I can't imagine there's that serious a temperature difference between the sides of the engine bay that it's worth the big 180 turn immediately out of the turbo? It seems a pointless design. Perhaps is it that someone just tossed a coin to decide it years ago and every FMIC has copied the same plumbing layout ever since? Are there any makes of FMIC that go clockwise?

Neilo

my hybrid goes clockwise.......think the classic version dont though.

Timothy Morphy

The hybrid on my classic goes anti-clockwise. You would still need a bend in the pipe coming from the turbo if running clockwise so as to clear the engine/fuell lines etc,not 180deg mind!. Also, as you have mentioned the last place you want the pipework to run past before the inlet is the very hot turbo, as it has no time to cool.

Tim

P1 FEK

iTrader: (1)

I have a Blitz FMIC and pipework from a version 8 fitted to my P1 and that runs clockwise. I've used some heat wrap on the pipe past the turbo to prevent heat soak and all works fine, inlet charge temps are nice and low.

rabskyline

here is my old greddy set up on my 94 wrx type ra !

silent running

Where?

Thanks for the comments guys. Interesting to see that some go clockwise and some go anticlockwise. Although I can see that it's best to keep the 'end' of the circuit away from the hot corner of the engine, tbh, it's not THAT hot. After all, we all know that the turbine side of the turbo hits hundreds of degrees centigrade quite easily, yet you can put your hand pretty close quite easily. The radiant heat is shielded and the convected heat doesn't amount to much more than would come off the gearbox and engine anyway. If this wasn't so, you'd not have the brake and clutch reservoirs there.

I suppose the best way would be to have a reversed inlet manifold really.

Austrian Impreza

iTrader: (9)

Bringing this thread back to life!

Is it possible to route the Hybrid FMIC pipes counterclockwise without any hassle?
Did anyone do this?
Why aren´t the kits sold with counterclockwise pipework, as it is a good idea and keeps temps down before the throttlebody!

bigdaveallan

iTrader: (7)

My intercooler pipework goes clockwise. Intercooler is a pro alloy version. Here is a pic.

Austrian Impreza

iTrader: (9)

there are quite many 90° bends as well as the pipework is directed very near to the turbo!

joz8968

iTrader: (13)

This set-up pretty much ticks all the boxes!

http://www.aisimports.co.uk/images/stock/1699_pr3.JPG

* Turbo to IC pipe comes off the 'correct' side of the compressor nozzle and pipe is reasonably straight but very short.
* Reversed inlet manifold's angled plenum keeps IC to TB pipe very short and straight.
* Inlet air reasonably distanced from turbo.

Austrian Impreza

iTrader: (9)

That´s the way to go!

For my streetcar it´s a bit overkill, so please let me know if someone did rotate the flowdirection with a Hybrid FMIC to flow counterclockwise?

silent running

It could be done. Would just need the two end pipes to be changed. The compressor outlet would be easy enough -just a straight pipe across the engine bay to join up with the existing bit that's there already. Then a basic L shape to join the throttle body on, and go the other way.

Austrian Impreza

iTrader: (9)

Does it have any effect?
Guys in Germany said that the 180°bend will be very bad for flow from the turbo away...