vtraudt

I haven't found a lot of profound information on rear mounted turbos, their pros and cons (keep the bs for yourself please). Most I found is biased (STS promotion, direct or indirect).

What DIY experience is available?
What to watch out?

I am soon starting my first "homemadeturbo" project and front or rear mounted is one of the first strategic decisions to be made.

Volker

chrisg

I don't have any hands on experance with rear mounted, but I have been told there could be oiling issues and boost issues with the long lines to the front.

cmr333

i have seen a rear mounted turbo on a rx8 here in fl that was pretty nice. it does need a external oil pump to transfer oil so far back, but with the long charge pipes going under the car an intercooler is not necessary. A nice medium sized front mount would help alot with really low ait's. lag isnt much a big deal either as long as you can do the math to get everything sized up right. i think its a pretty cool thing if a conventional setup isnt available or impossible.

martirw

i say go for it it cant be that bad

TurboRiv

I ran across some info on a '89 z24 cavalier build. RMT Z24 I also found a thread on the build on a gm f-body site Another Remote Mount Turbo System - Third Generation F-Body Message Boards There was a lot of info between the two. Finding a pump to return the oil to the pan seems to be main issue. I found some bio-diesel people modifying small block Chevy pumps to electric inline pumps here DIY, How to make a SBC veg-oil pump for cheap - Forums I was planning to use a pump like this for my car, but it will be awhile till i can say how it works. still gathering parts and planning build.

Turbo News

OP, what car are you trying to do a rear mounted turbo setup on?

Also, the oil issues can be remedied as long as the system is properly thought out. Boost should not be an issue, the only thing you should have to watch for is the clearances for the piping, making sure it does not impact anything... as well as using proper high pressure oil lines that are covered from the elements...

taiajam

some disadvantages are:

turbo LAG due to the colder exaustgases.
Turbolag caused by the very long intake pipes.
oil drain needs a extra pump.
airfilter is under the car.
the turbo can get wet and crack when you drive throug water on the road.


advantages.
no turbo manifold.
no downpipe, just a short pipe as exaust.
Cool spinning sound from the turbo. (Jet-sound)
easyer to fab to your exaustsystem.
no need for drilling a oilreturn in your oilpan

Turbo News

I think the low ground clearances would also affect the "fab" ability of the install...

darkhorizon

Turbolag caused by the very long intake pipes.

There is actually no lag caused by a long chargepipe.. its all about the exhaust setup screwing you.

The real issue with STS's is the oiling... you have to make sure its perfect or you will have issues.

r_senik

do it...so youll be different..other than that i dont know much bout rear turbo's