What's Better For Your Engine - TC or SC???

What is better for any type of lexus, in general, concerning less wear on the engine?

go with supercharger, smoother, more reliable. and sounds great

if you want reliability, then go for superchargers.
if you power is all you care, go for turbos. you can drop an Aristo twin turbo engine in there.

are you 2 serious... a turbo is proven more reliable... ford has even said that there supercharged cars/trucks need a special tune-up after a certain amount of miles...
superchargers put stress on the engine... power is taken from the engine to tuen the pulley, resulting in stress..

a turbocharger uses exhaust gas and takes no power from the engine... turbochargers are very reliable kept under 7-9psi and properly cooled to keep for dentonation...

turbochargers are very reliable kept under 7-9psi and properly cooled to keep for dentonation...


But what is the chance of having a turbo boosting less than 10 psi?
Even most stock turbo vehicles boosts higher than that.
And most people does not know how to take care of a turbo.
How often would you see people with turbo volvos and saabs that had installed turbo timers?or the owner sits in the car for a few minutes before shutting off the engine and leave the car?

But what is the chance of having a turbo boosting less than 10 psi?
Even most stock turbo vehicles boosts higher than that.
And most people does not know how to take care of a turbo.
How often would you see people with turbo volvos and saabs that had installed turbo timers?or the owner sits in the car for a few minutes before shutting off the engine and leave the car?


I would have to agree with the proper care statement, almost nobody that has a stock car with a turbo even knows the benefits of letting the vehicle run for a couple of minutes prior to shut off to properly cool the turbo/bearings.

but again most stock vehicles run 10-12 psi and have lower compression ratios to account for the increased cylinder pressures. people that are adding turbos and blowing up their engines are not installing dished pistons with 8.0-9.0:1 compression ratios and properly adjusting timing and upgrading ignition components. if these are left out or not done with higher boost levels s/c or turbo the engine will fail!

and again turbos and superchargers have pro's and cons pick which ever one is right for you by price and component quality!

you can drop an Aristo twin turbo engine in there.


You can but its not needed to go twin turbo.

go with a supercharger for boost at lower rpms and turbo at higher rpms. IOM supercharger is more reliable, turbos have that dam turbo lag.

it is a known fact that superchargers (roots or centrefugal) cause excessive wear on motors. specifically the crankshaft bearings (due to being pully driven). any well maintained turbo motor can outlast a supercharged one. but the key phrase there is well maintained.

But what is the chance of having a turbo boosting less than 10 psi?
Even most stock turbo vehicles boosts higher than that.
And most people does not know how to take care of a turbo.
How often would you see people with turbo volvos and saabs that had installed turbo timers?or the owner sits in the car for a few minutes before shutting off the engine and leave the car?

Yeah thats the point, stock turbo engine ussually boost at 10-15 psi. Thats because their designed for that turbo in mind.
That were the prob. with a n/a engine. The're not made for turbos. Esp an IS300, with its high compression, and VVT-I cams. At least change the pistons and put forged pistons (low compression, flat top pistons). Oh yeah a turbo timer will help.

Ive help out with a turbo on a 02 IS300. The owner has chewed up 2 head gaskets (hks). Booting over 11 psi. The IS300 isnt made to be turbo. If you are going to turbo the car, I suggest fuel upgrades, pressure reg, high flow fuel injectors, high flow fuel pump, etc.

I suggest a S/C. Like the "AREA 51" S/C. To help with the wear on the crank, I suggest a lightweight pulley kit, all around. You'll get like 250 HP with the s/c. Plus you get that cool supercharger whine.!!

Also you cant compare Ford engineering with Toyota engineering!!!!! :icon16: :icon16:
Say what you want, but thats the sorry truth.

Sorry for the continous Ranting. :evillol: