exhaust turbos

12th July 2010, 11:30

what do people think of these i came across them the other day.. but i am not too sure!

http://www.balancemotorsport.co.uk/p...=turbocharging

12th July 2010, 11:36

Are they serious?

12th July 2010, 11:37

haha i am not sure!

12th July 2010, 11:41

They work. Obviously not as well as a turbo close to the manifold but then some of that is balanced by not having to run an intercooler, and not lowering compression.
If you want a solution to give a few extra horses it works, but its not a solution for massive power. Its very popular in the US
Read their results...

http://www.balancemotorsport.co.uk/m...ry=Project+Car

12th July 2010, 12:04

as previously said by kam, it works and gives decent gains.

12th July 2010, 12:10

I'd run one just cause it looks a bit nuts
wonder what it sounds like

12th July 2010, 12:12

how come there isn't many people running this system if they give descent gains ?

12th July 2010, 12:28

Quote:

Originally Posted by Caino

how come there isn't many people running this system if they give descent gains ?

i was guna say the same thing, how comes you dont see it about that much?

12th July 2010, 12:29

It doesn't sound that great tbh after clicking kams link and watching the video at the bottom of the page and it also looks 'sluggish' off the line....Any idea how much these are? couldn't find a price on the site

12th July 2010, 12:42

that looks brilliant i would of thought it would be good to run a intercooler for the fact of the turbo is hot anyway and will heat the cool side up.

and what about road water being throwen on it and being sucked up into the turbo?

12th July 2010, 13:07

i couldnt find a price either i am interested in it now as they do gain abit of power...

12th July 2010, 13:11

Well if u fitted one im sure the heat would ignite all the un-burnt fuel in the system....tbh i dont think i would use one

12th July 2010, 13:14

if you look at the 350z on there websit it runs a fmic, i cant see where the intake is though I hope its not under the car

£1500 for the 205 kit surely that can be adapted to fit the saxo easily enough

12th July 2010, 16:34

u think thats mad i know saxo's arent rear wheel drive but i'd love to fit one of these to a 200sx http://www.tunersgroup.com/TunerWire...urbonique.html

12th July 2010, 16:55

had another look through the pics on thier site and it looks like the air filter is located under the car

12th July 2010, 19:16

Quote:

Originally Posted by Caino

how come there isn't many people running this system if they give descent gains ?

because the conventional style works better.

12th July 2010, 20:48

Surely this is laggy as fuck

12th July 2010, 21:38

Friend of mine (loudnproud over on 106oc) was looking at doing it to his XSi to save space in the bay, but there's a lot to consider when you do it. Stuff like pipe routing etc.

12th July 2010, 21:44

how many people guna go over a speedbump and smash it on that and rip it off..
keep it in the bay, stick with the way you know imo

14th July 2010, 13:12

Quote:

Originally Posted by samueljonburgess

i was guna say the same thing, how comes you dont see it about that much?

Simple answer because although it works brilliantly everytime someone posts rear mounts on the internet the same comments come up....

Lag - intake volumes similar to front mount due to small diameter tubing, and smaller diameter exhaust pipe and correctly sized turbo ensure lag is minimal. Ultimately you can make a rear mount work at the low end of the rev range with quick spool or for a bigger hit at the top end - just like a front mount. There is more lag when the exhaust is cold and no doubt heat wrap would improve this.

Speedbumps - the turbo is no lower than the exhaust silencer and last time I checked when wheels go over a speedbump the body shell rises

Air intake - yes it's out in the open yes it's at the back - it experiences similar conditions to a low mounted front cold air feed

Puddles - loads of these installs running in the USA and puddles have so far proved no more dangerous than you would expect. For example Cats run very hot and often get a soaking when mounted underneath the car and they stay together.

In the video the car is running just 156 hp, the start is on a hill and traction is poor off the start. Here is a clip of the car with 176hp taking off it nearly hits the top of second gear (approx 60mph) in 5 seconds

Here is a clip on a private road of acceleration in 3rd and 4th (tacho not working) with only 156hp. Lag doesn't appear to be an issue... (this clip requires quicktime to view )

thanks for the hits to the site. I expect you'll find rear mounts will take off when the EU makes our MOT like the German one where you won't be able to have any visible engine mods - bolt on and off system?

14th July 2010, 14:01

how do you get the oil to return to the sump from the turbo?
the turbo is so low .
one of the primary things with turbo,s is that there must be no restrcition in the oil return flow
,thats why ALL turbo equipped cars have them mounted so it is a gravity return ,and much larger dia pipe than the supply line,
so the oil does not back up in turbo and cause a back pressure which will cause seals to leak

14th July 2010, 14:12

Quote:

Originally Posted by axsaxoman

how do you get the oil to return to the sump from the turbo?
the turbo is so low .
one of the primary things with turbo,s is that there must be no restrcition in the oil return flow
,thats why ALL turbo equipped cars have them mounted so it is a gravity return ,and much larger dia pipe than the supply line,
so the oil does not back up in turbo and cause a back pressure which will cause seals to leak

oil is returned via an electric scavenge pump.

The turbo is low as the car is very low at the back. The plan was to move the front suspension pickup points to enable to the front to be lowered but never got round to it.

14th July 2010, 15:39

looks like a loda crap turbo lag smash it over bumps etc. might as well do it right to begin with

14th July 2010, 15:57

Quote:

Originally Posted by stevyj

looks like a loda crap turbo lag smash it over bumps etc. might as well do it right to begin with

The 205 has loads of space behind the rear beam, It looks low but its higher than the bottom of the chassis and the fuel tank. Rally cars get numerous bits fitted here such as powersteering pumps, fuel swirl pot tanks, batteries and whatever else you want out the way and protected.

14th July 2010, 16:15

yea i heard these give pretty big gains (obv not like a proper manifold turbo), especially if you have the right bore exhaust and a decat for maximum back pressure

14th July 2010, 16:19

this just looks wrong to me :/

14th July 2010, 16:30

im confused, i thought turbo's go directly into the engine, so how would a turbo work at the end of cycle where the exhausts go? does it simply push the exhaust gases out quicker??? x

14th July 2010, 16:34

Quote:

Originally Posted by bibbles

im confused, i thought turbo's go directly into the engine, so how would a turbo work at the end of cycle where the exhausts go? does it simply push the exhaust gases out quicker??? x

A normal turbo has a turbine inside that spins when the exhaust gasses pass through it , the turbo would be situated on the exhaust manifold, so if you fit a turbo further down the exhaust you will get a similar operation but less boost due to the exhaust pressure being lower at the tail pipe than at the manifold

14th July 2010, 16:51

like nuts, may be a stupid question, but could you run a dump valve off it too?

14th July 2010, 17:18

wouldnt have thought so with it being a low pressure turbo, not sure if 7psi is enough to operate a dumpvalve

14th July 2010, 17:40

ahhh, i dont know much at all bout turbo

14th July 2010, 17:43

looks intersting, would love one on my sierra

14th July 2010, 17:50

Quote:

Originally Posted by timmythechef

like nuts, may be a stupid question, but could you run a dump valve off it too?

maybe get a turbo with an external wastegate for a bit of noise?

14th July 2010, 19:08

or a diesel one lol

14th July 2010, 19:30

i dont know much about turbos but would it work if you had the conventional turbo in the engine bay and then that exhaust turbo at the back??

14th July 2010, 19:33

My question would be why? There appears to be no advantages if anything a few extra problems yet it costs similar to a more conventional setup.

14th July 2010, 19:36

Space is the main issue.

14th July 2010, 19:40

saw this on youtube on a corvette awhile back,

heres a great video which explains it all http://www.youtube.com/watch?v=13cvNXQOCjo

14th July 2010, 20:04

I normally laugh at concepts like this where people bodge together turbo coinversions however, im not laughing this time, it actually looks like a decent idea and a neat peice of kit.

Sure it wont give massive gains but as a simple bolt on bolt off conversion they could actually be onto something. And I could imagen it sounding absolutly mental aswell.

Also plently of space behind the torsion beam on a saxo, not sure where the intake would be routed though, the only realistic place would be alongside the exhust and thats a bad idea for reasons i dont even need to mention.

and that 205gti is running 0.5bar aswell, pretty impressive concidering.

17th July 2010, 09:51

i have seen these fitted to a few cars now, they do work and can give you a canny gain.
i think the main advantage is not having to spent a mint on a turbo manifold etc.

but they much have a canny turbo lag, it will have a canny distance to travel back to the inlet! lol

17th July 2010, 13:17

this is popular in america, i think the done thing is to hire a car for the week and fit one to that lol

17th July 2010, 22:55

Quote:

Originally Posted by LeeM

this is popular in america, i think the done thing is to hire a car for the week and fit one to that lol

'It was like that when I got it!'

18th July 2010, 19:59

mmm twin turbo saxo!! (engine bay and backbox)