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Anyone here ever done this to any car theyve owned? Im curious about it for the foresters and so cheap!
Squires Turbo Systems - Universal
Squires Turbo Systems - Universal
What I meant is hot gases. On my Cummins I am boosting 40 p.s.i because my EGT's went from 750 deg F to 1100 deg F:icon_wink: So easy to bump up the fuel on those 12V Cummins!!!:rock:^ i though the turbo spooled up based on pressure, not on heat ... can anyone verify this
Hot air has more energy. More energy means higher velocity. Higher velocity means faster spool. Cooler charge air means slower spool. You have the same volume of air getting to the turbo, but it's cold and slow by the time it gets there. Poor response is the recipe you are following. Subaru made a significant effort to reduce pre-turbo piping on the '10 LGT to the result of MUCH improved spool. Short exhaust before the turbo is fact for having high response.I understand the naysayers... but here are my points of discussion...
The theory of this type of system makes sense to me and im open for your intelligent ideas. Im no efi tuning/turbo guru but if you are feel free to chime in...
1. Air:
The exhaust gases have to reach the turbine to spool it, be it cooler/hotter, whether is 5 ft of header tubing or 10 ft downstream. You could heat wrap the exhaust if youre worried about loosing that much velocity, besides cooler turbo temps equal longevity right?
Seeing all the piping involved in say a FMIC setup would just about equal the length of the STS setup give or take a foot so lag would be relative...
You would need a REMARKABLY small turbine side to compensate for the lack of exhaust velocity. A turbine that small isn't going to be capable of spinning a compressor large enough to efficiently fill the charge pipe and force air to the motor. The "small turbine big compressor" idea falls on its face. There is more to turbo sizing than that.2. Turbocharger:
If you were to DIY, this is where you could pick your ideal turbo to give you the proper size per application needed. I dont think youd want anymore than 6-8 psi on a NA motor in the first place so normal low RPM driveability would be desired over top end track car prowess...
Not as easy as that, if you want it to be reliable, but you CAN use a PP6 and an RRFPR if you want to ghetto it into working, and not optimize power.3. Fuel/Tuning:
Now for me,this is where it gets tricky....couldnt you just use a RRFPR along with some piggy back system? plug in a like MY XT Ecu and tune from there...Im just shooting out ideas. Add some meth/water injection to be safe with pump gas....
Remote turbo mounting on a small displacement motor isn't going to do a lot. I would rekon a guess that you wouldn't be able to produce more than 3 or 4psi using a turbo that provides even modestly respectable spool. It just wouldn't be worth it.4. Engine damage:
Im sure if you go crazy boosting any 2.5NA motor something is gonna fail...but I have an engine and tranny for life guarantee when I bought my car....not saying If I overboosted my engine and killed it I would just unbolt all the parts and tow it to the shop, but you never know....:icon_wink: