This may have been covered before but I was just looking into all the info on here about turbos and the trd sc. Im kinda puzzled because it seems every turbo kit produces more power per PSI then the TRD SC. Plus a huge lack of TQ from the SC. Is this because the way TRD tuned the re-flash vs. aftermarket ECU's or a uni-chip just the way they are tuned? From my understanding it seems that all the current turbo setups, ZPI, Turbonetics, Dezod, seem to to have very safe tunes so way isnt the sc produsing more power?

Thanks for any info!

 

IMO, the supercharger produces what TRD wants it to produce. Plus, it's an entirely different type of system.

Someone correct me on this b/c I'm probably wrong, but the way I understand it, with the type of SC we have, it's going to take away a small amount of power just to turn the SC since it's on the same belt system as the rest of the engine. Where-as a turbo system is using exhaust gases to compress the air.

 

you're right, it is going to SAP away some power, but not a whole lot.
the main difference between the TRD supercharger and most turbo kits, is that most turbos are producing maximum boost at nearly 2.5K RPM, while the supercharger is designed to make maximum boost at redline.

Making boost in a linear function is going to be safer for the engine, instead of slamming all of that extra boost into the engine at once.

TRD used this design because it is generally easier on the engine, therefore, they are able to warranty it.

So like i said, the main difference is the Turbines design, and when max boost hits.

However, there is a basic equation on how to calculate horsepower.

For every 1psi, add 9.8 horsepower [turbo application]

and for a supercharger, add about 8.5-9 horsepower per psi, since you are losing a fraction of the power through belts.

but of course, as most real tuners know, the real world is different from simple equations. These numbers should only be used as ballpark numbers.