Turbo Plumbing, actuator, pipe work, dump valve, bleed valve
Turbo Mini Forums

I have recently been helping a chum build a Imp Turbo engine and he asked me if I could sketch out the basics of the turbo plumbing, so I did and I liked them so much I though I would share them.

I am happy to make changes if there are improvements to be made, but no crappy comments on the fact that it has 4 exhaust ports, or the oil feed is from the wrong side. They are generic pictures intended for guidance.

There are 3 different versions.

Plumbing with a Carburettor



Plumbing with Multiple TBs



And Plumbing with Single TB

Edited by Ben H on 19th Aug, 2012.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

Good diagrams.

However, the fuel regulator works differently on the injection setups.

Fuel goes in one end of the fuel rail and then the regulator sits the other end, controlling pressure by returning what is not used.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

That was one area I was debating if I should have the regulator or not. There are various different ways of doing it, and I doubt that a rising rate regulator is used often. The fact that I have shown the fuel rail as a dead end should give you a clue of how it is working there. Your description is perhaps more conventional though.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

Informative.You show,on the last diagram,the dump valve between the I/C and the plenum,which is the way I have done it, purely as a matter of convenience -space considerations. In a recent thread Rod S suggested I should put it before the intercooler and,whilst I respect his opinion and greater experience, I dont see what difference its likely to make.
Any comment, please?.

Hi
Dump valve will last longer on the "cold side" of the I/C and possibly reduce lag a little on gear shifts. Oem always seem to fit them hot side?
Cheers
Gavin :)

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As Gavin says, OEM seem to fit them "hot side" (it certainly is on my daily and is still the original at 120k miles so the materials must generally be OK for the temperatures), but remember, I made my suggestion when you were changing to a recirculating valve - Ben's diagrams are for atmospheric valves.

I suspect the fact that OEMs use the hot side for a recirculating valve is mainly down to simpler (ie, shorter) plumbing.

In turn, that "might" mean they can get away with a slightly smaller valve.... the recirculation path is certainly much shorter that way.

Schrödinger's cat - so which one am I ???

Obliged again for the explanation. As I said, I used the cold side merely because it was convenient and happily it is also the shortest recirculating path. Looks like I might have got one thing right this time ! Onward and upward.

Nice drawings.

I'm not a fan of all the Tee Pieces for the boost gauge, regulator and ECU, personally I'd use individual pipe for each of them but that's me.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

Remember holes weigh less than tee pieces. LOL.

one thing for the individual throttle bodies one, shouldn't the vacuum line be linked over all 4 bodies?

sort of 4 into one jobbie to give a decen vacuum reading rather than just the weak one from one cylinder?

or am i talking shit?

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1/4mile in 13.2sec @ 111 terminal on 15psi

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

thats cool. diagrams are great and now there is also lots of info below them on different set-ups/options!

perfect!

Just changed the title to help the search.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

it could be added to Rob's index tread maybe make it easier to find

http://www.turbominis.co.uk/forums/index.p...1013&lastpost=1

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A good idea, Rob can you sort it?

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

awesome thats cleared thinks up for me

Jack Jones

on the throttle bodied diagrams the boost gauge is T'd into the line from plenumn to regulator but on the carb it's taken from the inlet manifold. is it like that for a reason or can i just T it in? thanks

i have couple questions, sorry if they are silly

looking on first pic.
pipe coming from boost controller and written vent to air, so i need just leave it open?

and pipe which goes from boost gauge to picture (Megaso..) what does it mean? where i need to connect that pipe?


Thank you for help!

Nothing special!

Sparkle,

The reason the boost is taken from the plenum and not the manifold on the throttle bodies is that the MAP signal from just on throttle body is not very good. You can link all throttle bodies together with small pipes to overcome this if you like.

Chominsh,
Yes, just vent to air the same as a bleed valve. Some other MBCs connect up differently though so read their install instructions.

The megasquirt is the ignition control so it needs a MAP signal which in this case is the same as the boost gauge.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

In your case rather than the megasquirt you will probably be running to the distributor.

ok, Thank you :)

so if i don't have that megasquirt, i do not need that pipe? just pipe goes to gauge and connection wire to connection?

Edited by chominsh on 1st Apr, 2010.

Nothing special!

there is a vacum advance (boost retard?) can on the side of the distributor, but it is probably connected to the manifold already.

yea it is! so i do not need that pipe? or need to make there t-pice?

Nothing special!