Quote:
Originally Posted by jaf89f
"According to one report, Toyota is also prepping a TRD supercharger for the 2.0-liter engine." - From the short article posted by GoingToFast
That will be awesome, wonder how long it will be after the first model is up for sale that the TRD version with supercharger will be out.
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The Toyobaru's engine (
4U-GSE and
FA20 are Toyota and Subaru's monikers, respectively) has a
high compression ratio at 12.5:1 which could potentially present a problem to
non-intercooled supercharging. However, the ESS Tuning Stage I SuperCharger kit for the E92 M3 is a very good example of how it can be done without any problems. In fact, the
S65 V8 engine from BMW has also a
high compression ratio at 12.0:1, and yet, even without intercooling it manages to deliver (on stock internals):
Horsepower on 91AKI/95RON: 535 SAE (30% gain over stock)
Horsepower on 93AKI/98RON: 550 SAE (33% gain over stock)
Torque on 91AKI/95RON: 370ft/lbs
Torque on 93AKI/98RON: 380ft/lbs
with a boost pressure of ONLY
5 PSI (0.3 bar)!
In the Toyobaru, 30-33% power gain over stock translates into 256 - 262hp! So, it means that using a boost pressure in the vicinity of 5.0 - 5.5psi the Toyobaru can do it away with the need for an intercooler and all the associated pipework, hence all the space constraints!!!
Just to give you a taste of the thing (ESS Tuning Stage II E92 M3 SuperCharger kit w/ intercooler, boost pressure @ 6.5psi)...
ESS Tuning Stage I E92 M3 SuperCharger kit w/o intercooler, boost pressure @ 5psi:
