27 replies to this topic

[Turbo Phil]

If this is for your Metro surely there's no reason to go this route ? You have more than enough engine bay space & don't have to cut the bulkhead.

Phil.

[rally515]

http://passionford.c...nted-turbo.html

[Gremlin]

No complicated inefficient manifolds to make and no red hot turbo's to get burnt by when working in the engine bay

[Turbo Phil]

No complicated inefficient manifolds to make and no red hot turbo's to get burnt by when working in the engine bay

 

No, but you'll have an even more inefficient installation under your boot.

 

Phil.

[Gremlin]

Yeah I suppose, out of the way though. Be a bit weird if you ever only read like 1 page of someone's build thread and they said so I started taking off the rear subframe by taking off the turbo!

[cradley-heathen]

dont worry Turbo Phil, im not thinking of doing it to the metro, it was just that i was doing some research yesterday on the net and came across this thread when i was looking up remote mount turbos.

[welshdan]

there is enough to come to grips with a straight forward turbo install, especially if you are new to this. no point making things difficult for yourself for something that really is pointless.

 

it will take long enough to get a conventional install in an running, no doubt with many problems on the way.

[coopdog]

No complicated inefficient manifolds to make and no red hot turbo's to get burnt by when working in the engine bay

 
No, but you'll have an even more inefficient installation under your boot.
 
Phil.

Oi Phil get off the internet and finish my head!!

:L

[Pickup76]

My old mini with Suzuki Swift GTI engine and rear mount turbo:






Just did it that way because I could but it did work very well.

Edited by Pickup76, 25 April 2014 - 04:21 PM.

[Gremlin]

Can I ask what you did with the oil feed/drain?

[Pickup76]

I had a sandwich plate under the oil filter with some oil pipe running down to the turbo for the feed. Then i had a scavenge pump on the return feeding back into the sump just bellow the block. I had a fuse blow whilst driving and the scavenge stopped which i didnt reslise until the oil started passing the turbo seals and turned it into a smoke machine! Normally closed relay switching a warning light from the scavenge pump power is essential.

[Captain Mainwaring]

Nice,  like that.... have you considered an oil drain in the inlet tract? I can see issues with it sloppering up otherwise - something like a simple spring NRV with minimal back pressure would be fine, something that shut as soon as the turbo picked up boost.

 

I could see a situation where you could get a great glob of gunge and oil blown up to the engine if you don't have provision for a drain down.

Edited by Captain Mainwaring, 28 April 2014 - 06:39 AM.

[Captain Mainwaring]

with my limited knowledge of turboness i cant see why it would work any less efficiently than having it up at the front. the full exhaust pressure is still going through the turbo regardless of if its at the front or the back im sure.

my only concern was that it may have more lag due to the length of the pipework going back up to the front to the carb, but i dont know?

otherwise i kinda think the advantages outweight the disadvantages?

 

 

For what it's worth, it isn't pressure, it's volume that matters. as the exhaust gases cool, their volume decreases and as such then the velocity through the turbocharger scroll decreases with a corresponding loss of boost. It's a very good case for fully lagging the pipework from manifold to turbo, as during cold weather operation there will be a reasonably substantial loss of boost due to cooling and loss of volume of the exhaust gases.

 

Might also be worth looking at whether an intercooler is required, and also the diameter  of the pipework from the turbo to the charge cooler - looks a bit on the small side to me. There is a balance (how you calculate it I don't know) with keeping the amount of fresh air in the inlet tract to a minimum to avoid lag and surge and having a big enough pipe to avoid charge heating due to back pressure,