rear mounted turbo

[CMF_smj]

Hi, just read practical pefromance car mag for this month and a guy with a pug 205 gti has put a garrett turbo where his rear silencer used to be!! apparently its quite driveable and by the time the forced air has got back to the business end of the car its been cooled reasonably well, my question is, could this work on a k11???? i have aquired two silvia turbo units which are in good condition, i work for a water jet and laser cutting company with access to machine tools and manufacturing equipment, so the fabrication of actually dangling a turbo off an exhaust hanger is fairly easily achievable, as well as attaching it to the exhaust, however when this forced air arrives back in my engine bay staring at my throttle body, what do i do then!!!!????? i guess i need to introduce a bucket load more petrol than normal to cope with the extra air, how do i go about this, also would a low mileage healthy engine cope with a small amount of charged air, not looking for a million psi, just fancy doing it to say its been done, any thoughts(polite ones preferably) thanks

 

[CMF_frank2]

smj

it would be an interesting project !
i would think you would get a fair bit of lag tho, and you would need some long oil feed pipes, you might get away with bigger injectors if you kept it below about 5psi and kept your eye on the a/f/r guage

frank

 

[CMF_nz_aj]

Does this Pug have the exhaust exiting the motor at the front of the car (like the K11), or next to the firewall (like old Austin Mini, Toyota Echo/Vitz/Yaris etc)?

The amount of lag it would have would not be pleasurable to drive. Wait for it, wait for it...
Depending on the setup, the lag may cause big tuning issues.

Typically you want to keep the paths between the exhaust manifold & turbo, and turbo & inlet manifold, as short as possible.
Of these, keeping the turbo close to the exhaust is more important, so that you don't loose too much heat.

Some front drive cars mount the turbo to the side of the head above the gearbox, especially if the turbo is large & wont fit in the front. e.g. EVLGTI N14. This allows equal length runners between head & turbo.

 

[CMF_fred]

seems a fad thing to do. makes the engine bay appear n/a. all that extra plumbing and possible lag not real elegant solution. But hay why not, its not been done b4 on a micra. would you run 4-2-1 extractors with small dia tubing back to the turbo, cut a hole in the boot for the air filter? need a whole heap of design issues to overcome but you have access to a bunch of tools and toys that very few ppl have.

 

[CMF_micrat]

the oil return from the turbo to the sump would be interesting to set up. a scavenge pump to suck the oil back to the sump would be necessary.

 

[CMF_sikK11]

you need a pump to pump the oil back. It has been done alot and the lag issues you all speak of is not a big deal apparently. Very similiar to running a big front mount so i have been told. I though about doing this my mech actually brought it up but i have had to put it all on hold. If done properly is very easy and worthwhile to do.

 

[CMF_turbo march-rolling shell]

bahahahahaha. awesome.

 

[CMF_smj]

thanks for all your responses, i like the way you all come up with positive things about rear mount turbo, my idea was more why can't i do it???? rather than how much power can i make, the guy who did the peugeot 205 gti can be found here www.balancemotorsport.co.uk , my thoughts on oil lubrication was to make up a small(or big or medium!!!) sump housed in the boot, with an electric pump to pump oil down in to and through the turbo, a small motorbike oil cooler or old austin mini one could sit somewhere nicely up underneath the car out the way in the cold air to keep the oil cool, and to keep the turbo cool i was going to......................let one of you answer that one for me!!!!!!!!!!!, i have no idea what i am doing, and will probably end up with a broken engine, or if it does work a broken car when i forget to change to almera brakes, but its something that needs to be done! will bigger injectors give more fuel because they are bigger, or do they need to be worked by a trick ecu????? thanks